docs: add changelog for 5.2.4

Closes #21999

PR Close #22016

.circleci/config.yml

@@ -62,7 +62,7 @@ jobs:
       # Use bazel query so that we explicitly ask for all buildable targets to be built as well
       # This avoids waiting for a build command to finish before running the first test
       # See https://github.com/bazelbuild/bazel/issues/4257
-      - run: bazel query --output=label '//modules/... union //packages/... union //tools/... union @angular//...' | xargs bazel test --config=ci
+      - run: bazel query --output=label '//modules/... union //packages/... union //tools/...' | xargs bazel test --config=ci
 
       - save_cache:
           key: *cache_key

.github/angular-robot.yml

@@ -13,9 +13,33 @@ merge:
     # text to show when some checks are failing
     failureText: "The following checks are failing:"
 
+  # the g3 status will be added to your pull requests if they include files that match the patterns
+  g3Status:
+    # set to true to disable
+    disabled: false
+    # the name of the status
+    context: "google3"
+    # text to show when the status is pending
+    pendingDesc: "Googler: test this change in google3 http://go/angular-g3sync"
+    # text to show when the status is success
+    successDesc: "Does not affect google3"
+    # list of patterns to check for the files changed by the PR
+    # this list must be manually kept in sync with google3/third_party/javascript/angular2/copy.bara.sky
+    include:
+      - "BUILD.bazel"
+      - "LICENSE"
+      - "WORKSPACE"
+      - "modules/**"
+      - "packages/**"
+    # list of patterns to ignore for the files changed by the PR
+    exclude:
+      - "packages/language-service/**"
+      - "**/.gitignore"
+      - "**/.gitkeep"
+
   # comment that will be added to a PR when there is a conflict, leave empty or set to false to disable
-  mergeConflictComment: "Hello? Don't want to hassle you. Sure you're busy. But this PR has some merge conflicts that you probably ought to resolve.
-\nThat is... if you want it to be merged someday..."
+  mergeConflictComment: "Hi @{{PRAuthor}}! This PR has merge conflicts due to recent upstream merges.
+\nPlease help to unblock it by resolving these conflicts. Thanks!"
 
   # label to monitor
   mergeLabel: "PR action: merge"
@@ -32,6 +56,7 @@ merge:
     # list of labels that a PR shouldn't have, checked after the required labels with a regexp
     forbiddenLabels:
       - "PR target: TBD"
+      - "PR action: cleanup"
       - "cla: no"
 
     # list of PR statuses that need to be successful
@@ -44,9 +69,24 @@ merge:
     # the comment that will be added when the merge label is added despite failing checks, leave empty or set to false to disable
     # {{MERGE_LABEL}} will be replaced by the value of the mergeLabel option
     # {{PLACEHOLDER}} will be replaced by the list of failing checks
-    mergeRemovedComment: "I see that you just added the `{{MERGE_LABEL}}` label. It won't do anything good though, because the following checks are still failing:
-  \n{{PLACEHOLDER}}
-  \n
-  \n**If you want your PR to be merged, it has to pass all the CI checks.**
-  \n
-  \nIf you can't get the PR to a green state due to flakes or broken master, please try rebasing to master and/or restarting the CI job. If that fails and you believe that the issue is not due to your change, please contact the caretaker and ask for help."
+  mergeRemovedComment: "I see that you just added the `{{MERGE_LABEL}}` label, but the following checks are still failing:
+\n{{PLACEHOLDER}}
+\n
+\n**If you want your PR to be merged, it has to pass all the CI checks.**
+\n
+\nIf you can't get the PR to a green state due to flakes or broken master, please try rebasing to master and/or restarting the CI job. If that fails and you believe that the issue is not due to your change, please contact the caretaker and ask for help."
+
+# options for the triage plugin
+triage:
+  # number of the milestone to apply when the issue is triaged
+  defaultMilestone: 82,
+  # arrays of labels that determine if an issue is triaged
+  triagedLabels:
+    -
+      - "type: bug"
+      - "severity"
+      - "freq"
+      - "comp:"
+    -
+      - "type: feature"
+      - "comp:"

.pullapprove.yml

@@ -44,6 +44,7 @@ groups:
   all:
     users: all
     required: 1
+    rejection_value: -999
     # In this group, your self-approval does not count
     author_approval:
       auto: false
@@ -92,6 +93,7 @@ groups:
       - alexeagle #primary
       - chuckjaz
       - IgorMinar #fallback
+      - mhevery
       - vikerman #fallback
 
   build-and-ci:

.travis.yml

@@ -1,7 +1,5 @@
 language: node_js
-# Work-around for https://github.com/travis-ci/travis-ci/issues/8836#issuecomment-356362524.
-# (Restore `sudo: false` once that is resolved.)
-sudo: required
+sudo: false
 dist: trusty
 node_js:
   - '8.9.1'

BUILD.bazel

@@ -24,9 +24,7 @@ filegroup(
         "typescript",
         "zone.js",
         "tsutils",
-        "@types/jasmine",
-        "@types/node",
-        "@types/source-map",
+        "@types",
         "tsickle",
         "hammerjs",
         "protobufjs",

CHANGELOG.md

@@ -1,3 +1,52 @@
+<a name="5.2.4"></a>
+## [5.2.4](https://github.com/angular/angular/compare/5.2.3...5.2.4) (2018-02-07)
+
+
+### Bug Fixes
+
+* **common:** don't convert null to a string when flushing a mock request ([#21417](https://github.com/angular/angular/issues/21417)) ([c4fb696](https://github.com/angular/angular/commit/c4fb696)), closes [#20744](https://github.com/angular/angular/issues/20744)
+* **core:** fix [#20582](https://github.com/angular/angular/issues/20582), don't need to wrap zone in location change listener ([#22007](https://github.com/angular/angular/issues/22007)) ([ce51ea9](https://github.com/angular/angular/commit/ce51ea9))
+* **core:** fix proper propagation of subscriptions in EventEmitter ([#22016](https://github.com/angular/angular/issues/22016)) ([c6645e7](https://github.com/angular/angular/commit/c6645e7)), closes [#21999](https://github.com/angular/angular/issues/21999)
+* **core:** should check Zone existance when scheduleMicroTask ([#20656](https://github.com/angular/angular/issues/20656)) ([aa9ba7f](https://github.com/angular/angular/commit/aa9ba7f))
+
+
+
+<a name="5.2.3"></a>
+## [5.2.3](https://github.com/angular/angular/compare/5.2.2...5.2.3) (2018-01-31)
+
+
+### Bug Fixes
+
+* **common:** allow HttpInterceptors to inject HttpClient ([#19809](https://github.com/angular/angular/issues/19809)) ([ed2b717](https://github.com/angular/angular/commit/ed2b717)), closes [#18224](https://github.com/angular/angular/issues/18224)
+* **common:** generate closure-locale data file with exported plural functions ([#21873](https://github.com/angular/angular/issues/21873)) ([c2f5ed5](https://github.com/angular/angular/commit/c2f5ed5)), closes [#21870](https://github.com/angular/angular/issues/21870)
+* **core:** fix retrieving the binding name when an expression changes ([#21814](https://github.com/angular/angular/issues/21814)) ([81d64d6](https://github.com/angular/angular/commit/81d64d6)), closes [#21735](https://github.com/angular/angular/issues/21735) [#21788](https://github.com/angular/angular/issues/21788)
+* **forms:** allow FormBuilder to create controls with any formState type ([#20917](https://github.com/angular/angular/issues/20917)) ([56f3e18](https://github.com/angular/angular/commit/56f3e18)), closes [#20368](https://github.com/angular/angular/issues/20368)
+* **forms:** inserting and removing controls should work in re-bound form arrays ([#21822](https://github.com/angular/angular/issues/21822)) ([fad99cc](https://github.com/angular/angular/commit/fad99cc)), closes [#21501](https://github.com/angular/angular/issues/21501)
+* **language-service:** ensure correct paths are passed to TypeScript ([#21812](https://github.com/angular/angular/issues/21812)) ([250c8da](https://github.com/angular/angular/commit/250c8da))
+* **language-service:** spell diagnostics correctly ([#21812](https://github.com/angular/angular/issues/21812)) ([778e6e7](https://github.com/angular/angular/commit/778e6e7))
+* **router:** remove [@internal](https://github.com/internal) tag on ParamInheritanceType ([#21773](https://github.com/angular/angular/issues/21773)) ([35a0721](https://github.com/angular/angular/commit/35a0721)), closes [#21456](https://github.com/angular/angular/issues/21456)
+
+
+
+<a name="5.2.2"></a>
+## [5.2.2](https://github.com/angular/angular/compare/5.2.1...5.2.2) (2018-01-25)
+
+
+### Bug Fixes
+
+* **common:** A null value should remove the style on IE ([#21679](https://github.com/angular/angular/issues/21679)) ([c12ea3a](https://github.com/angular/angular/commit/c12ea3a)), closes [#21064](https://github.com/angular/angular/issues/21064)
+* **common:** don't remove special characters when extracting CLDR data ([#21626](https://github.com/angular/angular/issues/21626)) ([a62c186](https://github.com/angular/angular/commit/a62c186))
+* **common:** extract plural function from i18n locale data files for TS 2.6 ([#21626](https://github.com/angular/angular/issues/21626)) ([71f9eaa](https://github.com/angular/angular/commit/71f9eaa)), closes [#21608](https://github.com/angular/angular/issues/21608)
+* **common:** fallback to last defined value for named date and time formats ([#21299](https://github.com/angular/angular/issues/21299)) ([982eb7b](https://github.com/angular/angular/commit/982eb7b)), closes [#21282](https://github.com/angular/angular/issues/21282)
+* **compiler:** add support for marker tags in xliff serializers ([#21250](https://github.com/angular/angular/issues/21250)) ([02352bc](https://github.com/angular/angular/commit/02352bc)), closes [#21078](https://github.com/angular/angular/issues/21078)
+* **compiler:** Don't strip `/*# sourceURL ... */` ([#16088](https://github.com/angular/angular/issues/16088)) ([de6c644](https://github.com/angular/angular/commit/de6c644))
+* **compiler:** fix ICU select messages to use male/female/other ([#21713](https://github.com/angular/angular/issues/21713)) ([8e44577](https://github.com/angular/angular/commit/8e44577))
+* **compiler-cli:** do not fold errors past calls in the collector ([#21708](https://github.com/angular/angular/issues/21708)) ([52970c0](https://github.com/angular/angular/commit/52970c0))
+* **compiler-cli:** do not lower expressions in non-modules ([#21649](https://github.com/angular/angular/issues/21649)) ([ba4ea82](https://github.com/angular/angular/commit/ba4ea82))
+* **router:** don't use ParamsInheritanceStrategy in declarations ([#21574](https://github.com/angular/angular/issues/21574)) ([8b3fbb5](https://github.com/angular/angular/commit/8b3fbb5)), closes [#21456](https://github.com/angular/angular/issues/21456)
+
+
+
 <a name="5.2.1"></a>
 ## [5.2.1](https://github.com/angular/angular/compare/5.2.0...5.2.1) (2018-01-17)
 

CONTRIBUTING.md

@@ -72,7 +72,7 @@ Before you submit your Pull Request (PR) consider the following guidelines:
 1. Search [GitHub](https://github.com/angular/angular/pulls) for an open or closed PR
   that relates to your submission. You don't want to duplicate effort.
 1. Please sign our [Contributor License Agreement (CLA)](#cla) before sending PRs.
-  We cannot accept code without this.
+  We cannot accept code without this. Make sure you sign with the primary email address of the Git identity that has been granted access to the Angular repository.
 1. Fork the angular/angular repo.
 1. Make your changes in a new git branch:
 
@@ -259,6 +259,19 @@ changes to be accepted, the CLA must be signed. It's a quick process, we promise
 * For corporations we'll need you to
   [print, sign and one of scan+email, fax or mail the form][corporate-cla].
 
+<hr>
+
+  If you have more than one Git identity, you must make sure that you sign the CLA using the primary email address associated with the ID that has been granted access to the Angular repository. Git identities can be associated with more than one email address, and only one is primary. Here are some links to help you sort out multiple Git identities and email addresses:
+
+  * https://help.github.com/articles/setting-your-commit-email-address-in-git/
+  * https://stackoverflow.com/questions/37245303/what-does-usera-committed-with-userb-13-days-ago-on-github-mean
+  * https://help.github.com/articles/about-commit-email-addresses/
+  * https://help.github.com/articles/blocking-command-line-pushes-that-expose-your-personal-email-address/ 
+
+  Note that if you have more than one Git identity, it is important to verify that you are logged in with the same ID with which you signed the CLA, before you commit changes. If not, your PR will fail the CLA check.  
+
+<hr>
+
 
 [angular-group]: https://groups.google.com/forum/#!forum/angular
 [coc]: https://github.com/angular/code-of-conduct/blob/master/CODE_OF_CONDUCT.md

WORKSPACE

@@ -1,11 +1,11 @@
-workspace(name = "angular_src")
+workspace(name = "angular")
 
 load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
 
 git_repository(
     name = "build_bazel_rules_nodejs",
     remote = "https://github.com/bazelbuild/rules_nodejs.git",
-    tag = "0.3.1",
+    commit = "230d39a391226f51c03448f91eb61370e2e58c42",
 )
 
 load("@build_bazel_rules_nodejs//:defs.bzl", "check_bazel_version", "node_repositories")
@@ -16,19 +16,13 @@ node_repositories(package_json = ["//:package.json"])
 git_repository(
     name = "build_bazel_rules_typescript",
     remote = "https://github.com/bazelbuild/rules_typescript.git",
-#    tag = "0.7.1+",
-    commit = "89d2c75066bea3d9c942f29dd1d2ea543c58d6d5"
+    commit = "eb3244363e1cb265c84e723b347926f28c29aa35"
 )
 
-load("@build_bazel_rules_typescript//:setup.bzl", "ts_setup_workspace")
+load("@build_bazel_rules_typescript//:defs.bzl", "ts_setup_workspace")
 
 ts_setup_workspace()
 
-local_repository(
-    name = "angular",
-    path = "packages/bazel",
-)
-
 local_repository(
     name = "rxjs",
     path = "node_modules/rxjs/src",

aio/README.md

@@ -4,7 +4,7 @@ Everything in this folder is part of the documentation project. This includes
 
 * the web site for displaying the documentation
 * the dgeni configuration for converting source files to rendered files that can be viewed in the web site.
-* the tooling for setting up examples for development; and generating plunkers and zip files from the examples.
+* the tooling for setting up examples for development; and generating live-example and zip files from the examples.
 
 ## Developer tasks
 
@@ -13,7 +13,7 @@ You should run all these tasks from the `angular/aio` folder.
 Here are the most important tasks you might need to use:
 
 * `yarn` - install all the dependencies.
-* `yarn setup` - install all the dependencies, boilerplate, plunkers, zips and run dgeni on the docs.
+* `yarn setup` - install all the dependencies, boilerplate, stackblitz, zips and run dgeni on the docs.
 * `yarn setup-local` - same as `setup`, but use the locally built Angular packages for aio and docs examples boilerplate.
 
 * `yarn build` - create a production build of the application (after installing dependencies, boilerplate, etc).
@@ -32,7 +32,7 @@ Here are the most important tasks you might need to use:
 
 * `yarn boilerplate:add` - generate all the boilerplate code for the examples, so that they can be run locally. Add the option `--local` to use your local version of Angular contained in the "dist" folder.
 * `yarn boilerplate:remove` - remove all the boilerplate code that was added via `yarn boilerplate:add`.
-* `yarn generate-plunkers` - generate the plunker files that are used by the `live-example` tags in the docs.
+* `yarn generate-stackblitz` - generate the stackblitz files that are used by the `live-example` tags in the docs.
 * `yarn generate-zips` - generate the zip files from the examples. Zip available via the `live-example` tags in the docs.
 
 * `yarn example-e2e` - run all e2e tests for examples
@@ -105,8 +105,7 @@ The general setup is as follows:
 * Open a terminal, ensure the dependencies are installed; run an initial doc generation; then start the doc-viewer:
 
 ```bash
-yarn
-yarn docs
+yarn setup
 yarn start
 ```
 

aio/content/examples/.gitignore

@@ -76,8 +76,8 @@ aot-compiler/**/*.factory.d.ts
 # universal
 !universal/webpack.server.config.js
 
-# plunkers
-*plnkr.no-link.html
+# stackblitz
+*stackblitz.no-link.html
 
 # ngUpgrade testing
 !upgrade-phonecat-*/**/karma.conf.js

aio/content/examples/ajs-quick-reference/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "AngularJS to Angular Quick Reference",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js",

aio/content/examples/animations/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "Angular Animations",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js"

aio/content/examples/architecture/stackblitz.json

@@ -1,9 +1,9 @@
 {
   "description": "Intro to Angular",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js",
-    "!app/hero-list.component.1.*"
-  ]
+    "!**/*.[1].*"
+  ],
+  "file": "src/app/app.module.ts"
 }

aio/content/examples/attribute-directives/src/app/dummy.module.1.ts

@@ -1,4 +1,4 @@
-// Not used. Keep away from plunker
+// Not used. Keep away from stackblitz
 // Keeps ATLS from complaining about undeclared directives.
 import { NgModule } from '@angular/core';
 import { BrowserModule } from '@angular/platform-browser';

aio/content/examples/attribute-directives/stackblitz.json

@@ -1,10 +1,9 @@
 {
   "description": "Attribute Directive",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js",
-    "!app/*.[0,1,2,3].*"
+    "!**/*.[1,2,3].*"
   ],
   "tags": ["attribute", "directive"]
 }

aio/content/examples/bootstrapping/stackblitz.json

@@ -1,11 +1,10 @@
 {
   "description": "Bootstrapping",
-  "basePath": "src/",
   "files": [
     "!**/*.d.ts",
     "!**/*.js",
     "!**/*.[1,2].*"
   ],
-  "open": "app/app.component.ts",
+  "file": "src/app/app.component.ts",
   "tags": ["ngmodules"]
 }

aio/content/examples/component-interaction/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "Component Communication Cookbook samples",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js"

aio/content/examples/component-styles/src/app/hero-details.component.css

@@ -1,5 +1,6 @@
 /* #docregion import */
-@import 'hero-details-box.css';
+/* The AOT compiler needs the `./` to show that this is local */
+@import './hero-details-box.css';
 /* #enddocregion import */
 
 /* #docregion host */

aio/content/examples/component-styles/src/app/hero-team.component.ts

@@ -5,7 +5,8 @@ import { Hero } from './hero';
 @Component({
   selector: 'app-hero-team',
   template: `
-    <link rel="stylesheet" href="assets/hero-team.component.css">
+    <!-- We must use a relative URL so that the AOT compiler can find the stylesheet -->
+    <link rel="stylesheet" href="../assets/hero-team.component.css">
     <h3>Team</h3>
     <ul>
       <li *ngFor="let member of hero.team">

aio/content/examples/component-styles/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "Component Styles",
-  "basePath": "src/",
   "files": [
     "!**/*.d.ts",
     "!**/*.js",

aio/content/examples/dependency-injection-in-action/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "Dependency Injection",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js",

aio/content/examples/dependency-injection/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "Dependency Injection",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js",

aio/content/examples/displaying-data/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "Displaying Data",
-  "basePath": "src/",
   "files": [
     "!**/*.d.ts",
     "!**/*.js",

aio/content/examples/docs-style-guide/second.plnkr.json

@@ -1,9 +0,0 @@
-{
-  "description": "Second authors style guide plunker (non-executing)",
-  "basePath": "src/",
-  "files": [
-    "index.2.html"
-  ],
-  "main": "index.2.html",
-  "tags": ["author", "style guide"]
-}

aio/content/examples/docs-style-guide/second.stackblitz.json

@@ -0,0 +1,8 @@
+{
+  "description": "Second authors style guide stackblitz (non-executing)",
+  "files": [
+    "src/index.2.html"
+  ],
+  "main": "src/index.2.html",
+  "tags": ["author", "style guide"]
+}

aio/content/examples/docs-style-guide/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "Authors style guide",
-  "basePath": "src/",
   "files": [
     "!**/*.d.ts",
     "!**/*.js",

aio/content/examples/dynamic-component-loader/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "Dynamic Component Loader",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js"

aio/content/examples/dynamic-form/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "Dynamic Form",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js",

aio/content/examples/feature-modules/stackblitz.json

@@ -1,11 +1,10 @@
 {
   "description": "Feature Modules",
-  "basePath": "src/",
   "files": [
     "!**/*.d.ts",
     "!**/*.js",
     "!**/*.[1,2].*"
   ],
-  "open": "app/app.component.ts",
+  "file": "src/app/app.component.ts",
   "tags": ["feature modules"]
 }

aio/content/examples/form-validation/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "Validation",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js"

aio/content/examples/forms/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "Forms",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js"

aio/content/examples/hierarchical-dependency-injection/stackblitz.json

@@ -1,6 +1,5 @@
 {
   "description": "Hierarchical Dependency Injection",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js"

aio/content/examples/http/e2e-spec.ts

@@ -1,138 +0,0 @@
-'use strict'; // necessary for es6 output in node
-
-import { browser, element, by } from 'protractor';
-
-describe('Server Communication', function () {
-
-  beforeAll(function () {
-    browser.get('');
-  });
-
-  describe('Tour of Heroes (Observable)', function () {
-
-    let initialHeroCount = 4;
-    let newHeroName = 'Mr. IQ';
-    let heroCountAfterAdd = 5;
-
-    let heroListComp = element(by.tagName('hero-list'));
-    let addButton = heroListComp.element(by.tagName('button'));
-    let heroTags = heroListComp.all(by.tagName('li'));
-    let heroNameInput = heroListComp.element(by.tagName('input'));
-
-    it('should exist', function() {
-      expect(heroListComp).toBeDefined('<hero-list> must exist');
-    });
-
-    it('should display ' + initialHeroCount + ' heroes after init', function () {
-      expect(heroTags.count()).toBe(initialHeroCount);
-    });
-
-    it('should not add hero with empty name', function () {
-      expect(addButton).toBeDefined('"Add Hero" button must be defined');
-      addButton.click().then(function() {
-        expect(heroTags.count()).toBe(initialHeroCount, 'No new hero should be added');
-      });
-    });
-
-    it('should add a new hero to the list', function () {
-      expect(heroNameInput).toBeDefined('<input> for hero name must exist');
-      expect(addButton).toBeDefined('"Add Hero" button must be defined');
-      heroNameInput.sendKeys(newHeroName);
-      addButton.click().then(function() {
-        expect(heroTags.count()).toBe(heroCountAfterAdd, 'A new hero should be added');
-        let newHeroInList = heroTags.get(heroCountAfterAdd - 1).getText();
-        expect(newHeroInList).toBe(newHeroName, 'The hero should be added to the end of the list');
-      });
-    });
-  });
-
-  describe('Wikipedia Demo', function () {
-
-    it('should initialize the demo with empty result list', function () {
-      let myWikiComp = element(by.tagName('my-wiki'));
-      expect(myWikiComp).toBeDefined('<my-wiki> must exist');
-      let resultList = myWikiComp.all(by.tagName('li'));
-      expect(resultList.count()).toBe(0, 'result list must be empty');
-    });
-
-    describe('Fetches after each keystroke', function () {
-      it('should fetch results after "B"', function(done: any) {
-        testForRefreshedResult('B', done);
-      });
-
-      it('should fetch results after "Ba"', function(done: any) {
-        testForRefreshedResult('a', done);
-      });
-
-      it('should fetch results after "Bas"', function(done: any) {
-        testForRefreshedResult('s', done);
-      });
-
-      it('should fetch results after "Basic"', function(done: any) {
-        testForRefreshedResult('ic', done);
-      });
-    });
-
-    function testForRefreshedResult(keyPressed: string, done: () => void) {
-      testForResult('my-wiki', keyPressed, false, done);
-    }
-  });
-
-  describe('Smarter Wikipedia Demo', function () {
-
-    it('should initialize the demo with empty result list', function () {
-      let myWikiSmartComp = element(by.tagName('my-wiki-smart'));
-      expect(myWikiSmartComp).toBeDefined('<my-wiki-smart> must exist');
-      let resultList = myWikiSmartComp.all(by.tagName('li'));
-      expect(resultList.count()).toBe(0, 'result list must be empty');
-    });
-
-    it('should fetch results after "Java"', function(done: any) {
-      testForNewResult('Java', done);
-    });
-
-    it('should fetch results after "JavaS"', function(done: any) {
-      testForStaleResult('S', done);
-    });
-
-    it('should fetch results after "JavaSc"', function(done: any) {
-      testForStaleResult('c', done);
-    });
-
-    it('should fetch results after "JavaScript"', function(done: any) {
-      testForStaleResult('ript', done);
-    });
-
-
-    function testForNewResult(keyPressed: string, done: () => void) {
-      testForResult('my-wiki-smart', keyPressed, false, done);
-    }
-
-    function testForStaleResult(keyPressed: string, done: () => void) {
-      testForResult('my-wiki-smart', keyPressed, true, done);
-    }
-
-  });
-
-  function testForResult(componentTagName: string, keyPressed: string, hasListBeforeSearch: boolean, done: () => void) {
-    let searchWait = 1000; // Wait for wikipedia but not so long that tests timeout
-    let wikiComponent = element(by.tagName(componentTagName));
-    expect(wikiComponent).toBeDefined('<' + componentTagName + '> must exist');
-    let searchBox = wikiComponent.element(by.tagName('input'));
-    expect(searchBox).toBeDefined('<input> for search must exist');
-
-    searchBox.sendKeys(keyPressed).then(function () {
-      let resultList = wikiComponent.all(by.tagName('li'));
-
-      if (hasListBeforeSearch) {
-        expect(resultList.count()).toBeGreaterThan(0, 'result list should not be empty before search');
-      }
-
-      setTimeout(function() {
-        expect(resultList.count()).toBeGreaterThan(0, 'result list should not be empty after search');
-        done();
-      }, searchWait);
-    });
-  }
-
-});

aio/content/examples/http/e2e/app.e2e-spec.ts

@@ -0,0 +1,139 @@
+import { browser, element, by, ElementFinder } from 'protractor';
+import { resolve } from 'path';
+
+const page = {
+  configClearButton: element.all(by.css('app-config > div button')).get(2),
+  configErrorButton: element.all(by.css('app-config > div button')).get(3),
+  configErrorMessage: element(by.css('app-config p')),
+  configGetButton: element.all(by.css('app-config > div button')).get(0),
+  configGetResponseButton: element.all(by.css('app-config > div button')).get(1),
+  configSpan: element(by.css('app-config span')),
+  downloadButton: element.all(by.css('app-downloader button')).get(0),
+  downloadClearButton: element.all(by.css('app-downloader button')).get(1),
+  downloadMessage: element(by.css('app-downloader p')),
+  heroesListAddButton: element.all(by.css('app-heroes > div button')).get(0),
+  heroesListInput: element(by.css('app-heroes > div input')),
+  heroesListSearchButton: element.all(by.css('app-heroes > div button')).get(1),
+  heroesListItems: element.all(by.css('app-heroes ul li')),
+  logClearButton: element(by.css('app-messages button')),
+  logList: element(by.css('app-messages ol')),
+  logListItems: element.all(by.css('app-messages ol li')),
+  searchInput: element(by.css('app-package-search input#name')),
+  searchListItems: element.all(by.css('app-package-search li')),
+  uploadInput: element(by.css('app-uploader input')),
+  uploadMessage: element(by.css('app-uploader p'))
+};
+
+let checkLogForMessage = (message: string) => {
+  expect(page.logList.getText()).toContain(message);
+};
+
+describe('Http Tests', function() {
+  beforeEach(() => {
+    browser.get('');
+  });
+
+  describe('Heroes', () => {
+    it('retrieves the list of heroes at startup', () => {
+      expect(page.heroesListItems.count()).toBe(4);
+      expect(page.heroesListItems.get(0).getText()).toContain('Mr. Nice');
+      checkLogForMessage('GET "api/heroes"');
+    });
+
+    it('makes a POST to add a new hero', () => {
+      page.heroesListInput.sendKeys('Magneta');
+      page.heroesListAddButton.click();
+      expect(page.heroesListItems.count()).toBe(5);
+      checkLogForMessage('POST "api/heroes"');
+    });
+
+    it('makes a GET to search for a hero', () => {
+      page.heroesListInput.sendKeys('Celeritas');
+      page.heroesListSearchButton.click();
+      checkLogForMessage('GET "api/heroes?name=Celeritas"');
+    });
+  });
+
+  describe('Messages', () => {
+    it('can clear the logs', () => {
+      expect(page.logListItems.count()).toBe(1);
+      page.logClearButton.click();
+      expect(page.logListItems.count()).toBe(0);
+    });
+  });
+
+  describe('Configuration', () => {
+    it('can fetch the configuration JSON file', () => {
+      page.configGetButton.click();
+      checkLogForMessage('GET "assets/config.json"');
+      expect(page.configSpan.getText()).toContain('Heroes API URL is "api/heroes"');
+      expect(page.configSpan.getText()).toContain('Textfile URL is "assets/textfile.txt"');
+    });
+
+    it('can fetch the configuration JSON file with headers', () => {
+      page.configGetResponseButton.click();
+      checkLogForMessage('GET "assets/config.json"');
+      expect(page.configSpan.getText()).toContain('Response headers:');
+      expect(page.configSpan.getText()).toContain('content-type: application/json; charset=UTF-8');
+    });
+
+    it('can clear the configuration log', () => {
+      page.configGetResponseButton.click();
+      expect(page.configSpan.getText()).toContain('Response headers:');
+      page.configClearButton.click();
+      expect(page.configSpan.isPresent()).toBeFalsy();
+    });
+
+    it('throws an error for a non valid url', () => {
+      page.configErrorButton.click();
+      checkLogForMessage('GET "not/a/real/url"');
+      expect(page.configErrorMessage.getText()).toContain('"Something bad happened; please try again later."');
+    });
+  });
+
+  describe('Download', () => {
+    it('can download a txt file and show it', () => {
+      page.downloadButton.click();
+      checkLogForMessage('DownloaderService downloaded "assets/textfile.txt"');
+      checkLogForMessage('GET "assets/textfile.txt"');
+      expect(page.downloadMessage.getText()).toContain('Contents: "This is the downloaded text file "');
+    });
+
+    it('can clear the log of the download', () => {
+      page.downloadButton.click();
+      expect(page.downloadMessage.getText()).toContain('Contents: "This is the downloaded text file "');
+      page.downloadClearButton.click();
+      expect(page.downloadMessage.isPresent()).toBeFalsy();
+    });
+  });
+
+  describe('Upload', () => {
+    it('can upload a file', () => {
+      const filename = 'app.po.ts';
+      const url = resolve(__dirname, filename);
+      page.uploadInput.sendKeys(url);
+      checkLogForMessage('POST "/upload/file" succeeded in');
+      expect(page.uploadMessage.getText()).toContain(
+        `File "${filename}" was completely uploaded!`);
+    });
+  });
+
+  describe('PackageSearch', () => {
+    it('can search for npm package and find in cache', () => {
+      const packageName = 'angular';
+      page.searchInput.sendKeys(packageName);
+      checkLogForMessage(
+        'Caching response from "https://npmsearch.com/query?q=angular"');
+      expect(page.searchListItems.count()).toBeGreaterThan(1, 'angular items');
+
+      page.searchInput.clear();
+      page.searchInput.sendKeys(' ');
+      expect(page.searchListItems.count()).toBe(0, 'search empty');
+
+      page.searchInput.clear();
+      page.searchInput.sendKeys(packageName);
+      checkLogForMessage(
+        'Found cached response for "https://npmsearch.com/query?q=angular"');
+    });
+  });
+});

aio/content/examples/http/example-config.json

@@ -0,0 +1,3 @@
+{
+  "projectType": "testing"
+}

aio/content/examples/http/specs.stackblitz.json

@@ -0,0 +1,18 @@
+{
+  "description": "Http Guide Testing",
+  "files":[
+    "src/app/heroes/heroes.service.ts",
+    "src/app/heroes/heroes.service.spec.ts",
+
+    "src/app/http-error-handler.service.ts",
+    "src/app/message.service.ts",
+    "src/testing/*.ts",
+
+    "src/styles.css",
+    "src/test.css",
+    "src/main-specs.ts",
+    "src/index-specs.html"
+  ],
+  "main": "src/index-specs.html",
+  "tags": ["http", "testing"]
+}

aio/content/examples/http/src/app/app.component.html

@@ -0,0 +1,24 @@
+<h1>HTTP Sample</h1>
+<div>
+  <input type="checkbox" id="heroes" [checked]="toggleHeroes" (click)="toggleHeroes()">
+  <label for="heroes">Heroes</label>
+
+  <input type="checkbox" id="config" [checked]="showConfig" (click)="toggleConfig()">
+  <label for="config">Config</label>
+
+  <input type="checkbox" id="downloader" [checked]="showDownloader" (click)="toggleDownloader()">
+  <label for="downloader">Downloader</label>
+
+  <input type="checkbox" id="uploader" [checked]="showUploader" (click)="toggleUploader()">
+  <label for="uploader">Uploader</label>
+
+  <input type="checkbox" id="search" [checked]="showSearch" (click)="toggleSearch()">
+  <label for="search">Search</label>
+</div>
+
+<app-heroes *ngIf="showHeroes"></app-heroes>
+<app-messages></app-messages>
+<app-config *ngIf="showConfig"></app-config>
+<app-downloader *ngIf="showDownloader"></app-downloader>
+<app-uploader *ngIf="showUploader"></app-uploader>
+<app-package-search *ngIf="showSearch"></app-package-search>

aio/content/examples/http/src/app/app.component.ts

@@ -1,13 +1,19 @@
-// #docregion
-import { Component }         from '@angular/core';
+import { Component } from '@angular/core';
 
 @Component({
-  selector: 'my-app',
-  template: `
-    <hero-list></hero-list>
-    <hero-list-promise></hero-list-promise>
-    <my-wiki></my-wiki>
-    <my-wiki-smart></my-wiki-smart>
-  `
+  selector: 'app-root',
+  templateUrl: './app.component.html'
 })
-export class AppComponent { }
+export class AppComponent {
+  showHeroes = true;
+  showConfig = true;
+  showDownloader = true;
+  showUploader = true;
+  showSearch = true;
+
+  toggleHeroes() { this.showHeroes = !this.showHeroes; }
+  toggleConfig() { this.showConfig = !this.showConfig; }
+  toggleDownloader() { this.showDownloader = !this.showDownloader; }
+  toggleUploader() { this.showUploader = !this.showUploader; }
+  toggleSearch() { this.showSearch = !this.showSearch; }
+ }

aio/content/examples/http/src/app/app.module.1.ts

@@ -1,23 +0,0 @@
-// #docregion
-import { NgModule }      from '@angular/core';
-import { BrowserModule } from '@angular/platform-browser';
-import { FormsModule }   from '@angular/forms';
-import { HttpModule, JsonpModule } from '@angular/http';
-
-import { AppComponent } from './app.component';
-
-@NgModule({
-  imports: [
-    BrowserModule,
-    FormsModule,
-    HttpModule,
-    JsonpModule
-  ],
-  declarations: [ AppComponent ],
-  bootstrap:    [ AppComponent ]
-})
-export class AppModule {
-}
-
-
-

aio/content/examples/http/src/app/app.module.ts

@@ -1,46 +1,89 @@
 // #docplaster
-// #docregion
-import { NgModule }      from '@angular/core';
-import { BrowserModule } from '@angular/platform-browser';
-import { FormsModule }   from '@angular/forms';
-import { HttpModule, JsonpModule } from '@angular/http';
+// #docregion sketch
+import { NgModule }         from '@angular/core';
+import { BrowserModule }    from '@angular/platform-browser';
+// #enddocregion sketch
+import { FormsModule }      from '@angular/forms';
+// #docregion sketch
+import { HttpClientModule } from '@angular/common/http';
+// #enddocregion sketch
+import { HttpClientXsrfModule } from '@angular/common/http';
 
+import { HttpClientInMemoryWebApiModule } from 'angular-in-memory-web-api';
+import { InMemoryDataService }  from './in-memory-data.service';
 
-import { InMemoryWebApiModule }     from 'angular-in-memory-web-api';
-import { HeroData }                 from './hero-data';
-import { requestOptionsProvider }   from './default-request-options.service';
+import { RequestCache, RequestCacheWithMap } from './request-cache.service';
 
-import { AppComponent }             from './app.component';
+import { AppComponent }         from './app.component';
+import { AuthService }          from './auth.service';
+import { ConfigComponent }      from './config/config.component';
+import { DownloaderComponent }  from './downloader/downloader.component';
+import { HeroesComponent }      from './heroes/heroes.component';
+import { HttpErrorHandler }     from './http-error-handler.service';
+import { MessageService }       from './message.service';
+import { MessagesComponent }    from './messages/messages.component';
+import { PackageSearchComponent } from './package-search/package-search.component';
+import { UploaderComponent }    from './uploader/uploader.component';
 
-import { HeroListComponent }        from './toh/hero-list.component';
-import { HeroListPromiseComponent } from './toh/hero-list.component.promise';
-
-import { WikiComponent }      from './wiki/wiki.component';
-import { WikiSmartComponent } from './wiki/wiki-smart.component';
+import { httpInterceptorProviders } from './http-interceptors/index';
+// #docregion sketch
 
 @NgModule({
+// #docregion xsrf
   imports: [
+// #enddocregion xsrf
     BrowserModule,
+// #enddocregion sketch
     FormsModule,
-    HttpModule,
-    JsonpModule,
-    // #docregion in-mem-web-api
-    InMemoryWebApiModule.forRoot(HeroData)
-    // #enddocregion in-mem-web-api
+// #docregion sketch
+    // import HttpClientModule after BrowserModule.
+// #docregion xsrf
+    HttpClientModule,
+// #enddocregion sketch
+    HttpClientXsrfModule.withOptions({
+      cookieName: 'My-Xsrf-Cookie',
+      headerName: 'My-Xsrf-Header',
+    }),
+// #enddocregion xsrf
+
+    // The HttpClientInMemoryWebApiModule module intercepts HTTP requests
+    // and returns simulated server responses.
+    // Remove it when a real server is ready to receive requests.
+    HttpClientInMemoryWebApiModule.forRoot(
+      InMemoryDataService, {
+        dataEncapsulation: false,
+        passThruUnknownUrl: true,
+        put204: false // return entity after PUT/update
+      }
+    )
+// #docregion sketch, xsrf
   ],
+// #enddocregion xsrf
   declarations: [
     AppComponent,
-    HeroListComponent,
-    HeroListPromiseComponent,
-    WikiComponent,
-    WikiSmartComponent
+// #enddocregion sketch
+    ConfigComponent,
+    DownloaderComponent,
+    HeroesComponent,
+    MessagesComponent,
+    UploaderComponent,
+    PackageSearchComponent,
+// #docregion sketch
   ],
-// #docregion provide-default-request-options
-  providers: [ requestOptionsProvider ],
-// #enddocregion provide-default-request-options
+// #enddocregion sketch
+// #docregion interceptor-providers
+  providers: [
+    // #enddocregion interceptor-providers
+    AuthService,
+    HttpErrorHandler,
+    MessageService,
+    { provide: RequestCache, useClass: RequestCacheWithMap },
+    // #docregion interceptor-providers
+    httpInterceptorProviders
+  ],
+// #enddocregion interceptor-providers
+// #docregion sketch
   bootstrap: [ AppComponent ]
 })
 export class AppModule {}
-
-
-
+// #enddocregion sketch

aio/content/examples/http/src/app/auth.service.ts

@@ -0,0 +1,9 @@
+import { Injectable } from '@angular/core';
+
+/** Mock client-side authentication/authorization service */
+@Injectable()
+export class AuthService {
+  getAuthorizationToken() {
+    return 'some-auth-token';
+  }
+}

aio/content/examples/http/src/app/config/config.component.html

@@ -0,0 +1,18 @@
+<h3>Get configuration from JSON file</h3>
+<div>
+  <button (click)="clear(); showConfig()">get</button>
+  <button (click)="clear(); showConfigResponse()">getResponse</button>
+  <button (click)="clear()">clear</button>
+  <button (click)="clear(); makeError()">error</button>
+  <span *ngIf="config">
+    <p>Heroes API URL is "{{config.heroesUrl}}"</p>
+    <p>Textfile URL is "{{config.textfile}}"</p>
+    <div *ngIf="headers">
+      Response headers:
+      <ul>
+        <li *ngFor="let header of headers">{{header}}</li>
+      </ul>
+    </div>
+  </span>
+</div>
+<p *ngIf="error" class="error">{{error | json}}</p>

aio/content/examples/http/src/app/config/config.component.ts

@@ -0,0 +1,78 @@
+// #docplaster
+// #docregion
+import { Component } from '@angular/core';
+import { Config, ConfigService } from './config.service';
+import { MessageService } from '../message.service';
+
+@Component({
+  selector: 'app-config',
+  templateUrl: './config.component.html',
+  providers: [ ConfigService ],
+  styles: ['.error {color: red;}']
+})
+export class ConfigComponent {
+  error: any;
+  headers: string[];
+  // #docregion v2
+  config: Config;
+
+  // #enddocregion v2
+  constructor(private configService: ConfigService) {}
+
+  clear() {
+    this.config = undefined;
+    this.error = undefined;
+    this.headers = undefined;
+  }
+
+  // #docregion v1, v2, v3
+  showConfig() {
+    this.configService.getConfig()
+  // #enddocregion v1, v2
+      .subscribe(
+        data => this.config = { ...data }, // success path
+        error => this.error = error // error path
+      );
+  }
+  // #enddocregion v3
+
+  showConfig_v1() {
+    this.configService.getConfig_1()
+  // #docregion v1, v1_callback
+      .subscribe(data => this.config = {
+          heroesUrl: data['heroesUrl'],
+          textfile:  data['textfile']
+      });
+  // #enddocregion v1_callback
+  }
+  // #enddocregion v1
+
+  showConfig_v2() {
+    this.configService.getConfig()
+  // #docregion v2, v2_callback
+      // clone the data object, using its known Config shape
+      .subscribe(data => this.config = { ...data });
+  // #enddocregion v2_callback
+  }
+  // #enddocregion v2
+
+// #docregion showConfigResponse
+  showConfigResponse() {
+    this.configService.getConfigResponse()
+      // resp is of type `HttpResponse<Config>`
+      .subscribe(resp => {
+        // display its headers
+        const keys = resp.headers.keys();
+        this.headers = keys.map(key =>
+          `${key}: ${resp.headers.get(key)}`);
+
+        // access the body directly, which is typed as `Config`.
+        this.config = { ... resp.body };
+      });
+  }
+// #enddocregion showConfigResponse
+  makeError() {
+    this.configService.makeIntentionalError().subscribe(null, error => this.error = error );
+  }
+}
+// #enddocregion

aio/content/examples/http/src/app/config/config.service.ts

@@ -0,0 +1,100 @@
+// #docplaster
+// #docregion , proto
+import { Injectable } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+// #enddocregion proto
+import { HttpErrorResponse, HttpResponse } from '@angular/common/http';
+
+// #docregion rxjs-imports
+import { Observable } from 'rxjs/Observable';
+import { ErrorObservable } from 'rxjs/observable/ErrorObservable';
+import { catchError, retry } from 'rxjs/operators';
+// #enddocregion rxjs-imports
+
+// #docregion config-interface
+export interface Config {
+  heroesUrl: string;
+  textfile: string;
+}
+// #enddocregion config-interface
+// #docregion proto
+
+@Injectable()
+export class ConfigService {
+  // #enddocregion proto
+  // #docregion getConfig_1
+  configUrl = 'assets/config.json';
+
+  // #enddocregion getConfig_1
+  // #docregion proto
+  constructor(private http: HttpClient) { }
+  // #enddocregion proto
+
+  // #docregion getConfig, getConfig_1, getConfig_2, getConfig_3
+  getConfig() {
+  // #enddocregion getConfig_1, getConfig_2, getConfig_3
+    return this.http.get<Config>(this.configUrl)
+      .pipe(
+        retry(3), // retry a failed request up to 3 times
+        catchError(this.handleError) // then handle the error
+      );
+  }
+  // #enddocregion getConfig
+
+  getConfig_1() {
+  // #docregion getConfig_1
+    return this.http.get(this.configUrl);
+  }
+  // #enddocregion getConfig_1
+
+  getConfig_2() {
+    // #docregion getConfig_2
+    // now returns an Observable of Config
+    return this.http.get<Config>(this.configUrl);
+  }
+  // #enddocregion getConfig_2
+
+  getConfig_3() {
+    // #docregion getConfig_3
+    return this.http.get<Config>(this.configUrl)
+      .pipe(
+        catchError(this.handleError)
+      );
+  }
+  // #enddocregion getConfig_3
+
+  // #docregion getConfigResponse
+  getConfigResponse(): Observable<HttpResponse<Config>> {
+    return this.http.get<Config>(
+      this.configUrl, { observe: 'response' });
+  }
+  // #enddocregion getConfigResponse
+
+  // #docregion handleError
+  private handleError(error: HttpErrorResponse) {
+    if (error.error instanceof ErrorEvent) {
+      // A client-side or network error occurred. Handle it accordingly.
+      console.error('An error occurred:', error.error.message);
+    } else {
+      // The backend returned an unsuccessful response code.
+      // The response body may contain clues as to what went wrong,
+      console.error(
+        `Backend returned code ${error.status}, ` +
+        `body was: ${error.error}`);
+    }
+    // return an ErrorObservable with a user-facing error message
+    return new ErrorObservable(
+      'Something bad happened; please try again later.');
+  };
+  // #enddocregion handleError
+
+  makeIntentionalError() {
+    return this.http.get('not/a/real/url')
+      .pipe(
+        catchError(this.handleError)
+      );
+  }
+
+// #docregion proto
+}
+// #enddocregion proto

aio/content/examples/http/src/app/default-request-options.service.ts

@@ -1,16 +0,0 @@
-// #docregion
-import { Injectable } from '@angular/core';
-import { BaseRequestOptions, RequestOptions } from '@angular/http';
-
-@Injectable()
-export class DefaultRequestOptions extends BaseRequestOptions {
-
-  constructor() {
-    super();
-
-    // Set the default 'Content-Type' header
-    this.headers.set('Content-Type', 'application/json');
-  }
-}
-
-export const requestOptionsProvider = { provide: RequestOptions, useClass: DefaultRequestOptions };

aio/content/examples/http/src/app/downloader/downloader.component.html

@@ -0,0 +1,4 @@
+<h3>Download the textfile</h3>
+<button (click)="download()">Download</button>
+<button (click)="clear()">clear</button>
+<p *ngIf="contents">Contents: "{{contents}}"</p>

aio/content/examples/http/src/app/downloader/downloader.component.ts

@@ -0,0 +1,23 @@
+import { Component } from '@angular/core';
+import { DownloaderService } from './downloader.service';
+
+@Component({
+  selector: 'app-downloader',
+  templateUrl: './downloader.component.html',
+  providers: [ DownloaderService ]
+})
+export class DownloaderComponent {
+  contents: string;
+  constructor(private downloaderService: DownloaderService) {}
+
+  clear() {
+    this.contents = undefined;
+  }
+
+  // #docregion download
+  download() {
+    this.downloaderService.getTextFile('assets/textfile.txt')
+      .subscribe(results => this.contents = results);
+  }
+  // #enddocregion download
+}

aio/content/examples/http/src/app/downloader/downloader.service.ts

@@ -0,0 +1,39 @@
+import { Injectable } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+
+import { tap } from 'rxjs/operators';
+
+import { MessageService } from '../message.service';
+
+@Injectable()
+export class DownloaderService {
+  constructor(
+    private http: HttpClient,
+    private messageService: MessageService) { }
+
+  // #docregion getTextFile
+  getTextFile(filename: string) {
+    // The Observable returned by get() is of type Observable<string>
+    // because a text response was specified.
+    // There's no need to pass a <string> type parameter to get().
+    return this.http.get(filename, {responseType: 'text'})
+      .pipe(
+        tap( // Log the result or error
+          data => this.log(filename, data),
+          error => this.logError(filename, error)
+        )
+      );
+  }
+  // #enddocregion getTextFile
+
+  private log(filename: string, data: string) {
+    const message = `DownloaderService downloaded "${filename}" and got "${data}".`;
+    this.messageService.add(message);
+  }
+
+  private logError(filename: string, error: any) {
+    const message = `DownloaderService failed to download "${filename}"; got error "${error.message}".`;
+    console.error(message);
+    this.messageService.add(message);
+  }
+}

aio/content/examples/http/src/app/hero-data.ts

@@ -1,13 +0,0 @@
-// #docregion
-import { InMemoryDbService } from 'angular-in-memory-web-api';
-export class HeroData implements InMemoryDbService {
-  createDb() {
-    let heroes = [
-      { id: 1, name: 'Windstorm' },
-      { id: 2, name: 'Bombasto' },
-      { id: 3, name: 'Magneta' },
-      { id: 4, name: 'Tornado' }
-    ];
-    return {heroes};
-  }
-}

aio/content/examples/http/src/app/heroes.json

@@ -1,8 +0,0 @@
-{
-  "data": [
-    { "id": 1, "name": "Windstorm" },
-    { "id": 2, "name": "Bombasto" },
-    { "id": 3, "name": "Magneta" },
-    { "id": 4, "name": "Tornado" }
-  ]
-}

aio/content/examples/http/src/app/heroes/hero.ts

@@ -1,4 +1,4 @@
-export class User {
+export interface Hero {
   id: number;
   name: string;
 }

aio/content/examples/http/src/app/heroes/heroes.component.css

@@ -0,0 +1,89 @@
+/* HeroesComponent's private CSS styles */
+.heroes {
+  margin: 0 0 2em 0;
+  list-style-type: none;
+  padding: 0;
+  width: 15em;
+}
+.heroes li {
+  position: relative;
+  cursor: pointer;
+  background-color: #EEE;
+  margin: .5em;
+  padding: .3em 0;
+  height: 1.6em;
+  border-radius: 4px;
+  width: 19em;
+}
+
+.heroes li:hover {
+  color: #607D8B;
+  background-color: #DDD;
+  left: .1em;
+}
+
+.heroes a {
+  color: #888;
+  text-decoration: none;
+  position: relative;
+  display: block;
+  width: 250px;
+}
+
+.heroes a:hover {
+  color:#607D8B;
+}
+
+.heroes .badge {
+  display: inline-block;
+  font-size: small;
+  color: white;
+  padding: 0.8em 0.7em 0 0.7em;
+  background-color: #607D8B;
+  line-height: 1em;
+  position: relative;
+  left: -1px;
+  top: -4px;
+  height: 1.8em;
+  min-width: 16px;
+  text-align: right;
+  margin-right: .8em;
+  border-radius: 4px 0 0 4px;
+}
+
+.button {
+  background-color: #eee;
+  border: none;
+  padding: 5px 10px;
+  border-radius: 4px;
+  cursor: pointer;
+  cursor: hand;
+  font-family: Arial;
+}
+
+button:hover {
+  background-color: #cfd8dc;
+}
+
+button.delete {
+  position: relative;
+  left: 24em;
+  top: -32px;
+  background-color: gray !important;
+  color: white;
+  display: inherit;
+  padding: 5px 8px;
+  width: 2em;
+}
+
+input {
+  font-size: 100%;
+  margin-bottom: 2px;
+  width: 11em;
+}
+
+.heroes input {
+  position: relative;
+  top: -3px;
+  width: 12em;
+}

aio/content/examples/http/src/app/heroes/heroes.component.html

@@ -0,0 +1,32 @@
+<h3>Heroes</h3>
+<!-- #docregion add -->
+<div>
+  <label>Hero name:
+    <input #heroName />
+  </label>
+  <!-- (click) passes input value to add() and then clears the input -->
+  <button (click)="add(heroName.value); heroName.value=''">
+    add
+  </button>
+  <button (click)="search(heroName.value)">
+    search
+  </button>
+</div>
+<!-- #enddocregion add -->
+
+<!-- #docregion list -->
+<ul class="heroes">
+  <li *ngFor="let hero of heroes">
+    <a (click)="edit(hero)">
+      <span class="badge">{{ hero.id || -1 }}</span>
+      <span *ngIf="hero!==editHero">{{hero.name}}</span>
+      <input *ngIf="hero===editHero" [(ngModel)]="hero.name"
+        (blur)="update()" (keyup.enter)="update()">
+    </a>
+    <!-- #docregion delete -->
+    <button class="delete" title="delete hero"
+    (click)="delete(hero)">x</button>
+    <!-- #enddocregion delete -->
+  </li>
+</ul>
+<!-- #enddocregion list -->

aio/content/examples/http/src/app/heroes/heroes.component.ts

@@ -0,0 +1,76 @@
+import { Component, OnInit } from '@angular/core';
+
+import { Hero } from './hero';
+import { HeroesService } from './heroes.service';
+
+@Component({
+  selector: 'app-heroes',
+  templateUrl: './heroes.component.html',
+  providers: [ HeroesService ],
+  styleUrls: ['./heroes.component.css']
+})
+export class HeroesComponent implements OnInit {
+  heroes: Hero[];
+  editHero: Hero; // the hero currently being edited
+
+  constructor(private heroesService: HeroesService) { }
+
+  ngOnInit() {
+    this.getHeroes();
+  }
+
+  getHeroes(): void {
+    this.heroesService.getHeroes()
+      .subscribe(heroes => this.heroes = heroes);
+  }
+
+  add(name: string): void {
+    this.editHero = undefined;
+    name = name.trim();
+    if (!name) { return; }
+
+    // The server will generate the id for this new hero
+    const newHero: Hero = { name } as Hero;
+    // #docregion add-hero-subscribe
+    this.heroesService.addHero(newHero)
+      .subscribe(hero => this.heroes.push(hero));
+    // #enddocregion add-hero-subscribe
+  }
+
+  delete(hero: Hero): void {
+    this.heroes = this.heroes.filter(h => h !== hero);
+    // #docregion delete-hero-subscribe
+    this.heroesService.deleteHero(hero.id).subscribe();
+    // #enddocregion delete-hero-subscribe
+    /*
+    // #docregion delete-hero-no-subscribe
+    // oops ... subscribe() is missing so nothing happens
+    this.heroesService.deleteHero(hero.id);
+    // #enddocregion delete-hero-no-subscribe
+    */
+  }
+
+  edit(hero) {
+    this.editHero = hero;
+  }
+
+  search(searchTerm: string) {
+    this.editHero = undefined;
+    if (searchTerm) {
+      this.heroesService.searchHeroes(searchTerm)
+        .subscribe(heroes => this.heroes = heroes);
+    }
+  }
+
+  update() {
+    if (this.editHero) {
+      this.heroesService.updateHero(this.editHero)
+        .subscribe(hero => {
+          // replace the hero in the heroes list with update from server
+          const ix = hero ? this.heroes.findIndex(h => h.id === hero.id) : -1;
+          if (ix > -1) { this.heroes[ix] = hero; }
+        });
+      this.editHero = undefined;
+    }
+  }
+}

aio/content/examples/http/src/app/heroes/heroes.service.spec.ts

@@ -0,0 +1,156 @@
+import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';
+
+// Other imports
+import { TestBed } from '@angular/core/testing';
+import { HttpClient, HttpResponse } from '@angular/common/http';
+
+import { Hero } from './hero';
+import { HeroesService } from './heroes.service';
+import { HttpErrorHandler } from '../http-error-handler.service';
+import { MessageService } from '../message.service';
+
+describe('HeroesService', () => {
+  let httpClient: HttpClient;
+  let httpTestingController: HttpTestingController;
+  let heroService: HeroesService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      // Import the HttpClient mocking services
+      imports: [ HttpClientTestingModule ],
+      // Provide the service-under-test and its dependencies
+      providers: [
+        HeroesService,
+        HttpErrorHandler,
+        MessageService
+      ]
+    });
+
+    // Inject the http, test controller, and service-under-test
+    // as they will be referenced by each test.
+    httpClient = TestBed.get(HttpClient);
+    httpTestingController = TestBed.get(HttpTestingController);
+    heroService = TestBed.get(HeroesService);
+  });
+
+  afterEach(() => {
+    // After every test, assert that there are no more pending requests.
+    httpTestingController.verify();
+  });
+
+  /// HeroService method tests begin ///
+
+  describe('#getHeroes', () => {
+    let expectedHeroes: Hero[];
+
+    beforeEach(() => {
+      heroService = TestBed.get(HeroesService);
+      expectedHeroes = [
+        { id: 1, name: 'A' },
+        { id: 2, name: 'B' },
+       ] as Hero[];
+    });
+
+    it('should return expected heroes (called once)', () => {
+
+      heroService.getHeroes().subscribe(
+        heroes => expect(heroes).toEqual(expectedHeroes, 'should return expected heroes'),
+        fail
+      );
+
+      // HeroService should have made one request to GET heroes from expected URL
+      const req = httpTestingController.expectOne(heroService.heroesUrl);
+      expect(req.request.method).toEqual('GET');
+
+      // Respond with the mock heroes
+      req.flush(expectedHeroes);
+    });
+
+    it('should be OK returning no heroes', () => {
+
+      heroService.getHeroes().subscribe(
+        heroes => expect(heroes.length).toEqual(0, 'should have empty heroes array'),
+        fail
+      );
+
+      const req = httpTestingController.expectOne(heroService.heroesUrl);
+      req.flush([]); // Respond with no heroes
+    });
+
+    // This service reports the error but finds a way to let the app keep going.
+    it('should turn 404 into an empty heroes result', () => {
+
+      heroService.getHeroes().subscribe(
+        heroes => expect(heroes.length).toEqual(0, 'should return empty heroes array'),
+        fail
+      );
+
+      const req = httpTestingController.expectOne(heroService.heroesUrl);
+
+      // respond with a 404 and the error message in the body
+      const msg = 'deliberate 404 error';
+      req.flush(msg, {status: 404, statusText: 'Not Found'});
+    });
+
+    it('should return expected heroes (called multiple times)', () => {
+
+      heroService.getHeroes().subscribe();
+      heroService.getHeroes().subscribe();
+      heroService.getHeroes().subscribe(
+        heroes => expect(heroes).toEqual(expectedHeroes, 'should return expected heroes'),
+        fail
+      );
+
+      const requests = httpTestingController.match(heroService.heroesUrl);
+      expect(requests.length).toEqual(3, 'calls to getHeroes()');
+
+      // Respond to each request with different mock hero results
+      requests[0].flush([]);
+      requests[1].flush([{id: 1, name: 'bob'}]);
+      requests[2].flush(expectedHeroes);
+    });
+  });
+
+  describe('#updateHero', () => {
+    // Expecting the query form of URL so should not 404 when id not found
+    const makeUrl = (id: number) => `${heroService.heroesUrl}/?id=${id}`;
+
+    it('should update a hero and return it', () => {
+
+      const updateHero: Hero = { id: 1, name: 'A' };
+
+      heroService.updateHero(updateHero).subscribe(
+        data => expect(data).toEqual(updateHero, 'should return the hero'),
+        fail
+      );
+
+      // HeroService should have made one request to PUT hero
+      const req = httpTestingController.expectOne(heroService.heroesUrl);
+      expect(req.request.method).toEqual('PUT');
+      expect(req.request.body).toEqual(updateHero);
+
+      // Expect server to return the hero after PUT
+      const expectedResponse = new HttpResponse(
+        { status: 200, statusText: 'OK', body: updateHero });
+      req.event(expectedResponse);
+    });
+
+    // This service reports the error but finds a way to let the app keep going.
+    it('should turn 404 error into return of the update hero', () => {
+      const updateHero: Hero = { id: 1, name: 'A' };
+
+      heroService.updateHero(updateHero).subscribe(
+        data => expect(data).toEqual(updateHero, 'should return the update hero'),
+        fail
+      );
+
+      const req = httpTestingController.expectOne(heroService.heroesUrl);
+
+      // respond with a 404 and the error message in the body
+      const msg = 'deliberate 404 error';
+      req.flush(msg, {status: 404, statusText: 'Not Found'});
+    });
+  });
+
+  // TODO: test other HeroService methods
+});

aio/content/examples/http/src/app/heroes/heroes.service.ts

@@ -0,0 +1,99 @@
+// #docplaster
+import { Injectable } from '@angular/core';
+import { HttpClient, HttpParams } from '@angular/common/http';
+// #docregion http-options
+import { HttpHeaders } from '@angular/common/http';
+
+// #enddocregion http-options
+
+import { Observable } from 'rxjs/Observable';
+import { of } from 'rxjs/observable/of';
+import { catchError } from 'rxjs/operators';
+
+import { Hero } from './hero';
+import { HttpErrorHandler, HandleError } from '../http-error-handler.service';
+
+// #docregion http-options
+const httpOptions = {
+  headers: new HttpHeaders({
+    'Content-Type':  'application/json',
+    'Authorization': 'my-auth-token'
+  })
+};
+// #enddocregion http-options
+
+@Injectable()
+export class HeroesService {
+  heroesUrl = 'api/heroes';  // URL to web api
+  private handleError: HandleError;
+
+  constructor(
+    private http: HttpClient,
+    httpErrorHandler: HttpErrorHandler) {
+    this.handleError = httpErrorHandler.createHandleError('HeroesService');
+  }
+
+  /** GET heroes from the server */
+  getHeroes (): Observable<Hero[]> {
+    return this.http.get<Hero[]>(this.heroesUrl)
+      .pipe(
+        catchError(this.handleError('getHeroes', []))
+      );
+  }
+
+    // #docregion searchHeroes
+  /* GET heroes whose name contains search term */
+  searchHeroes(term: string): Observable<Hero[]> {
+    term = term.trim();
+
+    // Add safe, URL encoded search parameter if there is a search term
+    const options = term ?
+     { params: new HttpParams().set('name', term) } : {};
+
+    return this.http.get<Hero[]>(this.heroesUrl, options)
+      .pipe(
+        catchError(this.handleError<Hero[]>('searchHeroes', []))
+      );
+  }
+  // #enddocregion searchHeroes
+
+  //////// Save methods //////////
+
+  // #docregion addHero
+  /** POST: add a new hero to the database */
+  addHero (hero: Hero): Observable<Hero> {
+    return this.http.post<Hero>(this.heroesUrl, hero, httpOptions)
+      .pipe(
+        catchError(this.handleError('addHero', hero))
+      );
+  }
+  // #enddocregion addHero
+
+  // #docregion deleteHero
+  /** DELETE: delete the hero from the server */
+  deleteHero (id: number): Observable<{}> {
+    const url = `${this.heroesUrl}/${id}`; // DELETE api/heroes/42
+    return this.http.delete(url, httpOptions)
+      .pipe(
+        catchError(this.handleError('deleteHero'))
+      );
+  }
+  // #enddocregion deleteHero
+
+  // #docregion updateHero
+  /** PUT: update the hero on the server. Returns the updated hero upon success. */
+  updateHero (hero: Hero): Observable<Hero> {
+    // #enddocregion updateHero
+    // #docregion update-headers
+    httpOptions.headers =
+      httpOptions.headers.set('Authorization', 'my-new-auth-token');
+    // #enddocregion update-headers
+
+    // #docregion updateHero
+    return this.http.put<Hero>(this.heroesUrl, hero, httpOptions)
+      .pipe(
+        catchError(this.handleError('updateHero', hero))
+      );
+  }
+  // #enddocregion updateHero
+}

aio/content/examples/http/src/app/http-error-handler.service.ts

@@ -0,0 +1,47 @@
+import { Injectable } from '@angular/core';
+import { HttpErrorResponse } from '@angular/common/http';
+
+import { Observable } from 'rxjs/Observable';
+import { of } from 'rxjs/observable/of';
+
+import { MessageService } from './message.service';
+
+/** Type of the handleError function returned by HttpErrorHandler.createHandleError */
+export type HandleError =
+  <T> (operation?: string, result?: T) => (error: HttpErrorResponse) => Observable<T>;
+
+/** Handles HttpClient errors */
+@Injectable()
+export class HttpErrorHandler {
+  constructor(private messageService: MessageService) { }
+
+  /** Create curried handleError function that already knows the service name */
+  createHandleError = (serviceName = '') => <T>
+    (operation = 'operation', result = {} as T) => this.handleError(serviceName, operation, result);
+
+  /**
+   * Returns a function that handles Http operation failures.
+   * This error handler lets the app continue to run as if no error occurred.
+   * @param serviceName = name of the data service that attempted the operation
+   * @param operation - name of the operation that failed
+   * @param result - optional value to return as the observable result
+   */
+  handleError<T> (serviceName = '', operation = 'operation', result = {} as T) {
+
+    return (error: HttpErrorResponse): Observable<T> => {
+      // TODO: send the error to remote logging infrastructure
+      console.error(error); // log to console instead
+
+      const message = (error.error instanceof ErrorEvent) ?
+        error.error.message :
+       `server returned code ${error.status} with body "${error.error}"`;
+
+      // TODO: better job of transforming error for user consumption
+      this.messageService.add(`${serviceName}: ${operation} failed: ${message}`);
+
+      // Let the app keep running by returning a safe result.
+      return of( result );
+    };
+
+  }
+}

aio/content/examples/http/src/app/http-interceptors/auth-interceptor.ts

@@ -0,0 +1,42 @@
+// #docplaster
+import { Injectable } from '@angular/core';
+import {
+  HttpEvent, HttpInterceptor, HttpHandler, HttpRequest
+} from '@angular/common/http';
+
+import { Observable } from 'rxjs/Observable';
+
+// #docregion
+import { AuthService } from '../auth.service';
+
+@Injectable()
+export class AuthInterceptor implements HttpInterceptor {
+
+  constructor(private auth: AuthService) {}
+
+  intercept(req: HttpRequest<any>, next: HttpHandler) {
+    // Get the auth token from the service.
+    const authToken = this.auth.getAuthorizationToken();
+
+    // #enddocregion
+    /*
+    * The verbose way:
+    // #docregion
+    // Clone the request and replace the original headers with
+    // cloned headers, updated with the authorization.
+    const authReq = req.clone({
+      headers: req.headers.set('Authorization', authToken)
+    });
+    // #enddocregion
+    */
+    // #docregion set-header-shortcut
+    // Clone the request and set the new header in one step.
+    const authReq = req.clone({ setHeaders: { Authorization: authToken } });
+    // #enddocregion set-header-shortcut
+    // #docregion
+
+    // send cloned request with header to the next handler.
+    return next.handle(authReq);
+  }
+}
+// #enddocregion

aio/content/examples/http/src/app/http-interceptors/caching-interceptor.ts

@@ -0,0 +1,86 @@
+// #docplaster
+import { Injectable } from '@angular/core';
+import {
+  HttpEvent, HttpHeaders, HttpRequest, HttpResponse,
+  HttpInterceptor, HttpHandler
+} from '@angular/common/http';
+
+import { Observable } from 'rxjs/Observable';
+import { of } from 'rxjs/observable/of';
+import { startWith, tap } from 'rxjs/operators';
+
+import { RequestCache } from '../request-cache.service';
+import { searchUrl } from '../package-search/package-search.service';
+
+
+/**
+ * If request is cachable (e.g., package search) and
+ * response is in cache return the cached response as observable.
+ * If has 'x-refresh' header that is true,
+ * then also re-run the package search, using response from next(),
+ * returning an observable that emits the cached response first.
+ *
+ * If not in cache or not cachable,
+ * pass request through to next()
+ */
+// #docregion v1
+@Injectable()
+export class CachingInterceptor implements HttpInterceptor {
+  constructor(private cache: RequestCache) {}
+
+  intercept(req: HttpRequest<any>, next: HttpHandler) {
+    // continue if not cachable.
+    if (!isCachable(req)) { return next.handle(req); }
+
+    const cachedResponse = this.cache.get(req);
+    // #enddocregion v1
+    // #docregion intercept-refresh
+    // cache-then-refresh
+    if (req.headers.get('x-refresh')) {
+      const results$ = sendRequest(req, next, this.cache);
+      return cachedResponse ?
+        results$.pipe( startWith(cachedResponse) ) :
+        results$;
+    }
+    // cache-or-fetch
+    // #docregion v1
+    return cachedResponse ?
+      of(cachedResponse) : sendRequest(req, next, this.cache);
+    // #enddocregion intercept-refresh
+  }
+}
+// #enddocregion v1
+
+
+/** Is this request cachable? */
+function isCachable(req: HttpRequest<any>) {
+  // Only GET requests are cachable
+  return req.method === 'GET' &&
+    // Only npm package search is cachable in this app
+    -1 < req.url.indexOf(searchUrl);
+}
+
+// #docregion send-request
+/**
+ * Get server response observable by sending request to `next()`.
+ * Will add the response to the cache on the way out.
+ */
+function sendRequest(
+  req: HttpRequest<any>,
+  next: HttpHandler,
+  cache: RequestCache): Observable<HttpEvent<any>> {
+
+  // No headers allowed in npm search request
+  const noHeaderReq = req.clone({ headers: new HttpHeaders() });
+
+  return next.handle(noHeaderReq).pipe(
+    tap(event => {
+      // There may be other events besides the response.
+      if (event instanceof HttpResponse) {
+        cache.put(req, event); // Update the cache.
+      }
+    })
+  );
+}
+// #enddocregion send-request
+

aio/content/examples/http/src/app/http-interceptors/ensure-https-interceptor.ts

@@ -0,0 +1,20 @@
+import { Injectable } from '@angular/core';
+import {
+  HttpEvent, HttpInterceptor, HttpHandler, HttpRequest
+} from '@angular/common/http';
+
+import { Observable } from 'rxjs/Observable';
+
+@Injectable()
+export class EnsureHttpsInterceptor implements HttpInterceptor {
+  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
+    // #docregion excerpt
+    // clone request and replace 'http://' with 'https://' at the same time
+    const secureReq = req.clone({
+      url: req.url.replace('http://', 'https://')
+    });
+    // send the cloned, "secure" request to the next handler.
+    return next.handle(secureReq);
+    // #enddocregion excerpt
+  }
+}

aio/content/examples/http/src/app/http-interceptors/index.ts

@@ -0,0 +1,34 @@
+// #docplaster
+// #docregion interceptor-providers
+/* "Barrel" of Http Interceptors */
+import { HTTP_INTERCEPTORS } from '@angular/common/http';
+
+// #enddocregion interceptor-providers
+import { AuthInterceptor } from './auth-interceptor';
+import { CachingInterceptor } from './caching-interceptor';
+import { EnsureHttpsInterceptor } from './ensure-https-interceptor';
+import { LoggingInterceptor } from './logging-interceptor';
+// #docregion interceptor-providers
+import { NoopInterceptor } from './noop-interceptor';
+// #enddocregion interceptor-providers
+import { TrimNameInterceptor } from './trim-name-interceptor';
+import { UploadInterceptor } from './upload-interceptor';
+
+// #docregion interceptor-providers
+
+/** Http interceptor providers in outside-in order */
+export const httpInterceptorProviders = [
+  // #docregion noop-provider
+  { provide: HTTP_INTERCEPTORS, useClass: NoopInterceptor, multi: true },
+  // #enddocregion noop-provider, interceptor-providers
+
+  { provide: HTTP_INTERCEPTORS, useClass: EnsureHttpsInterceptor, multi: true },
+  { provide: HTTP_INTERCEPTORS, useClass: TrimNameInterceptor, multi: true },
+  { provide: HTTP_INTERCEPTORS, useClass: AuthInterceptor, multi: true },
+  { provide: HTTP_INTERCEPTORS, useClass: LoggingInterceptor, multi: true },
+  { provide: HTTP_INTERCEPTORS, useClass: UploadInterceptor, multi: true },
+  { provide: HTTP_INTERCEPTORS, useClass: CachingInterceptor, multi: true },
+
+  // #docregion interceptor-providers
+];
+// #enddocregion interceptor-providers

aio/content/examples/http/src/app/http-interceptors/logging-interceptor.ts

@@ -0,0 +1,39 @@
+import { Injectable } from '@angular/core';
+import {
+  HttpEvent, HttpInterceptor, HttpHandler,
+  HttpRequest, HttpResponse
+} from '@angular/common/http';
+
+import { Observable } from 'rxjs/Observable';
+// #docregion excerpt
+import { finalize, tap } from 'rxjs/operators';
+import { MessageService } from '../message.service';
+
+@Injectable()
+export class LoggingInterceptor implements HttpInterceptor {
+  constructor(private messenger: MessageService) {}
+
+  intercept(req: HttpRequest<any>, next: HttpHandler) {
+    const started = Date.now();
+    let ok: string;
+
+    // extend server response observable with logging
+    return next.handle(req)
+      .pipe(
+        tap(
+          // Succeeds when there is a response; ignore other events
+          event => ok = event instanceof HttpResponse ? 'succeeded' : '',
+          // Operation failed; error is an HttpErrorResponse
+          error => ok = 'failed'
+        ),
+        // Log when response observable either completes or errors
+        finalize(() => {
+          const elapsed = Date.now() - started;
+          const msg = `${req.method} "${req.urlWithParams}"
+             ${ok} in ${elapsed} ms.`;
+          this.messenger.add(msg);
+        })
+      );
+  }
+}
+// #enddocregion excerpt

aio/content/examples/http/src/app/http-interceptors/noop-interceptor.ts

@@ -0,0 +1,16 @@
+import { Injectable } from '@angular/core';
+import {
+  HttpEvent, HttpInterceptor, HttpHandler, HttpRequest
+} from '@angular/common/http';
+
+import { Observable } from 'rxjs/Observable';
+
+/** Pass untouched request through to the next request handler. */
+@Injectable()
+export class NoopInterceptor implements HttpInterceptor {
+
+  intercept(req: HttpRequest<any>, next: HttpHandler):
+    Observable<HttpEvent<any>> {
+    return next.handle(req);
+  }
+}

aio/content/examples/http/src/app/http-interceptors/trim-name-interceptor.ts

@@ -0,0 +1,24 @@
+import { Injectable } from '@angular/core';
+import {
+  HttpEvent, HttpInterceptor, HttpHandler, HttpRequest
+} from '@angular/common/http';
+
+import { Observable } from 'rxjs/Observable';
+
+@Injectable()
+export class TrimNameInterceptor implements HttpInterceptor {
+  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
+    const body = req.body;
+    if (!body || !body.name ) {
+      return next.handle(req);
+    }
+    // #docregion excerpt
+    // copy the body and trim whitespace from the name property
+    const newBody = { ...body, name: body.name.trim() };
+    // clone request and set its body
+    const newReq = req.clone({ body: newBody });
+    // send the cloned request to the next handler.
+    return next.handle(newReq);
+    // #enddocregion excerpt
+  }
+}

aio/content/examples/http/src/app/http-interceptors/upload-interceptor.ts

@@ -0,0 +1,62 @@
+import { Injectable } from '@angular/core';
+import {
+  HttpEvent, HttpInterceptor, HttpHandler,
+  HttpRequest, HttpResponse,
+  HttpEventType, HttpProgressEvent
+} from '@angular/common/http';
+
+import { Observable } from 'rxjs/Observable';
+import { of } from 'rxjs/observable/of';
+
+/** Simulate server replying to file upload request */
+@Injectable()
+export class UploadInterceptor implements HttpInterceptor {
+  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
+    if (req.url.indexOf('/upload/file') === -1) {
+      return next.handle(req);
+    }
+    const delay = 300; // Todo: inject delay?
+    return createUploadEvents(delay);
+  }
+}
+
+/** Create simulation of upload event stream */
+function createUploadEvents(delay: number) {
+  // Simulate XHR behavior which would provide this information in a ProgressEvent
+  const chunks = 5;
+  const total = 12345678;
+  const chunkSize = Math.ceil(total / chunks);
+
+  return new Observable<HttpEvent<any>>(observer => {
+    // notify the event stream that the request was sent.
+    observer.next({type: HttpEventType.Sent});
+
+    uploadLoop(0);
+
+    function uploadLoop(loaded: number) {
+      // N.B.: Cannot use setInterval or rxjs delay (which uses setInterval)
+      // because e2e test won't complete. A zone thing?
+      // Use setTimeout and tail recursion instead.
+        setTimeout(() => {
+          loaded += chunkSize;
+
+          if (loaded >= total) {
+            const doneResponse = new HttpResponse({
+              status: 201, // OK but no body;
+            });
+            observer.next(doneResponse);
+            observer.complete();
+            return;
+          }
+
+          const progressEvent: HttpProgressEvent = {
+            type: HttpEventType.UploadProgress,
+            loaded,
+            total
+          };
+          observer.next(progressEvent);
+          uploadLoop(loaded);
+        }, delay);
+    }
+  });
+}

aio/content/examples/http/src/app/in-memory-data.service.ts

@@ -0,0 +1,13 @@
+import { InMemoryDbService } from 'angular-in-memory-web-api';
+
+export class InMemoryDataService implements InMemoryDbService {
+  createDb() {
+    const heroes = [
+      { id: 11, name: 'Mr. Nice' },
+      { id: 12, name: 'Narco' },
+      { id: 13, name: 'Bombasto' },
+      { id: 14, name: 'Celeritas' },
+    ];
+    return {heroes};
+  }
+}

aio/content/examples/http/src/app/message.service.ts

@@ -0,0 +1,14 @@
+import { Injectable } from '@angular/core';
+
+@Injectable()
+export class MessageService {
+  messages: string[] = [];
+
+  add(message: string) {
+    this.messages.push(message);
+  }
+
+  clear() {
+    this.messages = [];
+  }
+}

aio/content/examples/http/src/app/messages/messages.component.html

@@ -0,0 +1,8 @@
+<div *ngIf="messageService.messages.length">
+  <h3>Messages</h3>
+  <button class="clear" (click)="messageService.clear()">clear</button>
+  <br>
+  <ol>
+    <li *ngFor='let message of messageService.messages'> {{message}} </li>
+  </ol>
+</div>

aio/content/examples/http/src/app/messages/messages.component.ts

@@ -0,0 +1,10 @@
+import { Component } from '@angular/core';
+import { MessageService } from '../message.service';
+
+@Component({
+  selector: 'app-messages',
+  templateUrl: './messages.component.html'
+})
+export class MessagesComponent {
+  constructor(public messageService: MessageService) {}
+}

aio/content/examples/http/src/app/package-search/package-search.component.html

@@ -0,0 +1,17 @@
+<!-- #docplaster -->
+<h3>Search Npm Packages</h3>
+<p><i>Searches when typing stops. Caches for 30 seconds.</i></p>
+<!-- #docregion search -->
+<input (keyup)="search($event.target.value)" id="name" placeholder="Search"/>
+<!-- #enddocregion search -->
+<input type="checkbox" id="refresh" [checked]="withRefresh" (click)="toggleRefresh()">
+<label for="refresh">with refresh</label>
+<!-- #docregion search -->
+
+<ul>
+  <li *ngFor="let package of packages$ | async">
+    <b>{{package.name}} v.{{package.version}}</b> -
+    <i>{{package.description}}</i>
+  </li>
+</ul>
+<!-- #enddocregion search -->

aio/content/examples/http/src/app/package-search/package-search.component.ts

@@ -0,0 +1,39 @@
+import { Component, OnInit } from '@angular/core';
+
+import { Observable } from 'rxjs/Observable';
+import { Subject } from 'rxjs/Subject';
+import { debounceTime, distinctUntilChanged, switchMap } from 'rxjs/operators';
+
+import { NpmPackageInfo, PackageSearchService } from './package-search.service';
+
+@Component({
+  selector: 'app-package-search',
+  templateUrl: './package-search.component.html',
+  providers: [ PackageSearchService ]
+})
+export class PackageSearchComponent implements OnInit {
+  // #docregion debounce
+  withRefresh = false;
+  packages$: Observable<NpmPackageInfo[]>;
+  private searchText$ = new Subject<string>();
+
+  search(packageName: string) {
+    this.searchText$.next(packageName);
+  }
+
+  ngOnInit() {
+    this.packages$ = this.searchText$.pipe(
+      debounceTime(500),
+      distinctUntilChanged(),
+      switchMap(packageName =>
+        this.searchService.search(packageName, this.withRefresh))
+    );
+  }
+
+  constructor(private searchService: PackageSearchService) { }
+
+  // #enddocregion debounce
+
+  toggleRefresh() { this.withRefresh = ! this.withRefresh; }
+
+}

aio/content/examples/http/src/app/package-search/package-search.service.ts

@@ -0,0 +1,62 @@
+import { Injectable } from '@angular/core';
+import { HttpClient, HttpHeaders, HttpParams } from '@angular/common/http';
+
+import { Observable } from 'rxjs/Observable';
+import { of } from 'rxjs/observable/of';
+import { catchError, map } from 'rxjs/operators';
+
+import { HttpErrorHandler, HandleError } from '../http-error-handler.service';
+
+export interface NpmPackageInfo {
+  name: string;
+  version: string;
+  description: string;
+}
+
+export const searchUrl = 'https://npmsearch.com/query';
+
+const httpOptions = {
+  headers: new HttpHeaders({
+    'x-refresh':  'true'
+  })
+};
+
+function createHttpOptions(packageName: string, refresh = false) {
+    // npm package name search api
+    // e.g., http://npmsearch.com/query?q=dom'
+    const params = new HttpParams({ fromObject: { q: packageName } });
+    const headerMap = refresh ? {'x-refresh': 'true'} : {};
+    const headers = new HttpHeaders(headerMap) ;
+    return { headers, params };
+}
+
+@Injectable()
+export class PackageSearchService {
+  private handleError: HandleError;
+
+  constructor(
+    private http: HttpClient,
+    httpErrorHandler: HttpErrorHandler) {
+    this.handleError = httpErrorHandler.createHandleError('HeroesService');
+  }
+
+  search (packageName: string, refresh = false): Observable<NpmPackageInfo[]> {
+    // clear if no pkg name
+    if (!packageName.trim()) { return of([]); }
+
+    const options = createHttpOptions(packageName, refresh);
+
+    // TODO: Add error handling
+    return this.http.get(searchUrl, options).pipe(
+      map((data: any) => {
+        return data.results.map(entry => ({
+            name: entry.name[0],
+            version: entry.version[0],
+            description: entry.description[0]
+          } as NpmPackageInfo )
+        );
+      }),
+      catchError(this.handleError('search', []))
+    );
+  }
+}

aio/content/examples/http/src/app/request-cache.service.ts

@@ -0,0 +1,60 @@
+import { Injectable } from '@angular/core';
+import { HttpRequest, HttpResponse } from '@angular/common/http';
+
+import { MessageService } from './message.service';
+
+export interface RequestCacheEntry {
+  url: string;
+  response: HttpResponse<any>;
+  lastRead: number;
+}
+
+// #docregion request-cache
+export abstract class RequestCache {
+  abstract get(req: HttpRequest<any>): HttpResponse<any> | undefined;
+  abstract put(req: HttpRequest<any>, response: HttpResponse<any>): void
+}
+// #enddocregion request-cache
+
+const maxAge = 30000; // maximum cache age (ms)
+
+@Injectable()
+export class RequestCacheWithMap implements RequestCache {
+
+  cache = new Map<string, RequestCacheEntry>();
+
+  constructor(private messenger: MessageService) { }
+
+  get(req: HttpRequest<any>): HttpResponse<any> | undefined {
+    const url = req.urlWithParams;
+    const cached = this.cache.get(url);
+
+    if (!cached) {
+      return undefined;
+    }
+
+    const isExpired = cached.lastRead < (Date.now() - maxAge);
+    const expired = isExpired ? 'expired ' : '';
+    this.messenger.add(
+      `Found ${expired}cached response for "${url}".`);
+    return isExpired ? undefined : cached.response;
+  }
+
+  put(req: HttpRequest<any>, response: HttpResponse<any>): void {
+    const url = req.urlWithParams;
+    this.messenger.add(`Caching response from "${url}".`);
+
+    const entry = { url, response, lastRead: Date.now() };
+    this.cache.set(url, entry);
+
+    // remove expired cache entries
+    const expired = Date.now() - maxAge;
+    this.cache.forEach(entry => {
+      if (entry.lastRead < expired) {
+        this.cache.delete(entry.url);
+      }
+    });
+
+    this.messenger.add(`Request cache size: ${this.cache.size}.`);
+  }
+}

aio/content/examples/http/src/app/toh/hero-list.component.html

@@ -1,11 +0,0 @@
-<!-- #docregion -->
-<h1>Tour of Heroes ({{mode}})</h1>
-<h3>Heroes:</h3>
-<ul>
-  <li *ngFor="let hero of heroes">{{hero.name}}</li>
-</ul>
-
-<label>New hero name: <input #newHeroName /></label>
-<button (click)="addHero(newHeroName.value); newHeroName.value=''">Add Hero</button>
-
-<p class="error" *ngIf="errorMessage">{{errorMessage}}</p>

aio/content/examples/http/src/app/toh/hero-list.component.promise.ts

@@ -1,40 +0,0 @@
-// #docregion
-// Promise Version
-import { Component, OnInit } from '@angular/core';
-import { Hero }              from './hero';
-import { HeroService }       from './hero.service.promise';
-
-@Component({
-  selector: 'hero-list-promise',
-  templateUrl: './hero-list.component.html',
-  providers: [ HeroService ],
-  styles: ['.error {color:red;}']
-})
-// #docregion component
-export class HeroListPromiseComponent implements OnInit {
-  errorMessage: string;
-  heroes: Hero[];
-  mode = 'Promise';
-
-  constructor (private heroService: HeroService) {}
-
-  ngOnInit() { this.getHeroes(); }
-
-  // #docregion methods
-  getHeroes() {
-    this.heroService.getHeroes()
-                     .then(
-                       heroes => this.heroes = heroes,
-                       error =>  this.errorMessage = <any>error);
-  }
-
-  addHero (name: string) {
-    if (!name) { return; }
-    this.heroService.addHero(name)
-                     .then(
-                       hero  => this.heroes.push(hero),
-                       error =>  this.errorMessage = <any>error);
-  }
-  // #enddocregion methods
-}
-// #enddocregion component

aio/content/examples/http/src/app/toh/hero-list.component.ts

@@ -1,44 +0,0 @@
-// #docregion
-// Observable Version
-import { Component, OnInit } from '@angular/core';
-import { Hero }              from './hero';
-import { HeroService }       from './hero.service';
-
-@Component({
-  selector: 'hero-list',
-  templateUrl: './hero-list.component.html',
-  providers: [ HeroService ],
-  styles: ['.error {color:red;}']
-})
-// #docregion component
-export class HeroListComponent implements OnInit {
-  errorMessage: string;
-  heroes: Hero[];
-  mode = 'Observable';
-
-  constructor (private heroService: HeroService) {}
-
-  ngOnInit() { this.getHeroes(); }
-
-  // #docregion methods
-  // #docregion getHeroes
-  getHeroes() {
-    this.heroService.getHeroes()
-                     .subscribe(
-                       heroes => this.heroes = heroes,
-                       error =>  this.errorMessage = <any>error);
-  }
-  // #enddocregion getHeroes
-
-  // #docregion addHero
-  addHero(name: string) {
-    if (!name) { return; }
-    this.heroService.create(name)
-                     .subscribe(
-                       hero  => this.heroes.push(hero),
-                       error =>  this.errorMessage = <any>error);
-  }
-  // #enddocregion addHero
-  // #enddocregion methods
-}
-// #enddocregion component

aio/content/examples/http/src/app/toh/hero.service.promise.ts

@@ -1,60 +0,0 @@
-// #docplaster
-// #docregion
-// Promise Version
-import { Injectable }              from '@angular/core';
-import { Http, Response }          from '@angular/http';
-import { Headers, RequestOptions } from '@angular/http';
-
-// #docregion rxjs-imports
-import 'rxjs/add/operator/toPromise';
-// #enddocregion rxjs-imports
-
-import { Hero } from './hero';
-
-@Injectable()
-export class HeroService {
-  // URL to web api
-  private heroesUrl = 'app/heroes';
-
-  constructor (private http: Http) {}
-
-  // #docregion methods
-  getHeroes (): Promise<Hero[]> {
-    return this.http.get(this.heroesUrl)
-                    .toPromise()
-                    .then(this.extractData)
-                    .catch(this.handleError);
-  }
-
-  addHero (name: string): Promise<Hero> {
-    let headers = new Headers({ 'Content-Type': 'application/json' });
-    let options = new RequestOptions({ headers: headers });
-
-    return this.http.post(this.heroesUrl, { name }, options)
-               .toPromise()
-               .then(this.extractData)
-               .catch(this.handleError);
-  }
-
-  private extractData(res: Response) {
-    let body = res.json();
-    return body.data || { };
-  }
-
-  private handleError (error: Response | any) {
-    // In a real world app, we might use a remote logging infrastructure
-    let errMsg: string;
-    if (error instanceof Response) {
-      const body = error.json() || '';
-      const err = body.error || JSON.stringify(body);
-      errMsg = `${error.status} - ${error.statusText || ''} ${err}`;
-    } else {
-      errMsg = error.message ? error.message : error.toString();
-    }
-    console.error(errMsg);
-    return Promise.reject(errMsg);
-  }
-
-// #enddocregion methods
-}
-// #enddocregion

aio/content/examples/http/src/app/toh/hero.service.ts

@@ -1,80 +0,0 @@
-// #docplaster
-// #docregion
-// Observable Version
-// #docregion v1
-import { Injectable }              from '@angular/core';
-import { Http, Response }          from '@angular/http';
-// #enddocregion v1
-// #docregion import-request-options
-import { Headers, RequestOptions } from '@angular/http';
-// #enddocregion import-request-options
-// #docregion v1
-
-// #docregion rxjs-imports
-import { Observable } from 'rxjs/Observable';
-import 'rxjs/add/operator/catch';
-import 'rxjs/add/operator/map';
-// #enddocregion rxjs-imports
-
-import { Hero } from './hero';
-
-@Injectable()
-export class HeroService {
-  // #docregion endpoint
-  private heroesUrl = 'api/heroes';  // URL to web API
-  // #enddocregion endpoint
-
-  // #docregion ctor
-  constructor (private http: Http) {}
-  // #enddocregion ctor
-
-  // #docregion methods, error-handling, http-get
-  getHeroes(): Observable<Hero[]> {
-    return this.http.get(this.heroesUrl)
-                    .map(this.extractData)
-                    .catch(this.handleError);
-  }
-  // #enddocregion error-handling, http-get, v1
-
-  // #docregion create, create-sig
-  create(name: string): Observable<Hero> {
-  // #enddocregion create-sig
-    let headers = new Headers({ 'Content-Type': 'application/json' });
-    let options = new RequestOptions({ headers: headers });
-
-    return this.http.post(this.heroesUrl, { name }, options)
-                    .map(this.extractData)
-                    .catch(this.handleError);
-  }
-  // #enddocregion create
-
-  // #docregion v1, extract-data
-  private extractData(res: Response) {
-    let body = res.json();
-    return body.data || { };
-  }
-  // #enddocregion extract-data
-  // #docregion error-handling
-
-  private handleError (error: Response | any) {
-    // In a real world app, you might use a remote logging infrastructure
-    let errMsg: string;
-    if (error instanceof Response) {
-      const body = error.json() || '';
-      const err = body.error || JSON.stringify(body);
-      errMsg = `${error.status} - ${error.statusText || ''} ${err}`;
-    } else {
-      errMsg = error.message ? error.message : error.toString();
-    }
-    console.error(errMsg);
-    return Observable.throw(errMsg);
-  }
-  // #enddocregion error-handling, methods
-}
-// #enddocregion
-
-/*
-  // #docregion endpoint-json
-  private heroesUrl = 'app/heroes.json'; // URL to JSON file
-  // #enddocregion endpoint-json
-*/

aio/content/examples/http/src/app/toh/hero.ts

@@ -1,6 +0,0 @@
-// #docregion
-export class Hero {
-  constructor(
-    public id: number,
-    public name: string) { }
-}

aio/content/examples/http/src/app/uploader/uploader.component.html

@@ -0,0 +1,12 @@
+<h3>Upload file</h3>
+<form enctype="multipart/form-data" method="post">
+  <div>
+    <label for="picked">Choose file to upload</label>
+    <div>
+      <input type="file" id="picked" #picked
+        (click)="message=''"
+        (change)="onPicked(picked)">
+    </div>
+  </div>
+  <p *ngIf="message">{{message}}</p>
+</form>

aio/content/examples/http/src/app/uploader/uploader.component.ts

@@ -0,0 +1,25 @@
+import { Component } from '@angular/core';
+import { UploaderService } from './uploader.service';
+
+@Component({
+  selector: 'app-uploader',
+  templateUrl: './uploader.component.html',
+  providers: [ UploaderService ]
+})
+export class UploaderComponent {
+  message: string;
+
+  constructor(private uploaderService: UploaderService) {}
+
+  onPicked(input: HTMLInputElement) {
+    const file = input.files[0];
+    if (file) {
+      this.uploaderService.upload(file).subscribe(
+        msg => {
+          input.value = null;
+          this.message = msg;
+        }
+      );
+    }
+  }
+}

aio/content/examples/http/src/app/uploader/uploader.service.ts

@@ -0,0 +1,105 @@
+import { Injectable } from '@angular/core';
+import {
+  HttpClient, HttpEvent, HttpEventType, HttpProgressEvent,
+  HttpRequest, HttpResponse, HttpErrorResponse
+} from '@angular/common/http';
+
+import { of } from 'rxjs/observable/of';
+import { catchError, last, map, tap } from 'rxjs/operators';
+
+import { MessageService } from '../message.service';
+
+@Injectable()
+export class UploaderService {
+  constructor(
+    private http: HttpClient,
+    private messenger: MessageService) {}
+
+  // If uploading multiple files, change to:
+  // upload(files: FileList) {
+  //   const formData = new FormData();
+  //   files.forEach(f => formData.append(f.name, f));
+  //   new HttpRequest('POST', '/upload/file', formData, {reportProgress: true});
+  //   ...
+  // }
+
+  upload(file: File) {
+    if (!file) { return; }
+
+    // COULD HAVE WRITTEN:
+    // return this.http.post('/upload/file', file, {
+    //   reportProgress: true,
+    //   observe: 'events'
+    // }).pipe(
+
+    // Create the request object that POSTs the file to an upload endpoint.
+    // The `reportProgress` option tells HttpClient to listen and return
+    // XHR progress events.
+    // #docregion upload-request
+    const req = new HttpRequest('POST', '/upload/file', file, {
+      reportProgress: true
+    });
+    // #enddocregion upload-request
+
+    // #docregion upload-body
+    // The `HttpClient.request` API produces a raw event stream
+    // which includes start (sent), progress, and response events.
+    return this.http.request(req).pipe(
+      map(event => this.getEventMessage(event, file)),
+      tap(message => this.showProgress(message)),
+      last(), // return last (completed) message to caller
+      catchError(this.handleError(file))
+    );
+    // #enddocregion upload-body
+  }
+
+  // #docregion getEventMessage
+  /** Return distinct message for sent, upload progress, & response events */
+  private getEventMessage(event: HttpEvent<any>, file: File) {
+    switch (event.type) {
+      case HttpEventType.Sent:
+        return `Uploading file "${file.name}" of size ${file.size}.`;
+
+      case HttpEventType.UploadProgress:
+        // Compute and show the % done:
+        const percentDone = Math.round(100 * event.loaded / event.total);
+        return `File "${file.name}" is ${percentDone}% uploaded.`;
+
+      case HttpEventType.Response:
+        return `File "${file.name}" was completely uploaded!`;
+
+      default:
+        return `File "${file.name}" surprising upload event: ${event.type}.`;
+    }
+  }
+  // #enddocregion getEventMessage
+
+  /**
+   * Returns a function that handles Http upload failures.
+   * @param file - File object for file being uploaded
+   *
+   * When no `UploadInterceptor` and no server,
+   * you'll end up here in the error handler.
+   */
+  private handleError(file: File) {
+    const userMessage = `${file.name} upload failed.`;
+
+    return (error: HttpErrorResponse) => {
+      // TODO: send the error to remote logging infrastructure
+      console.error(error); // log to console instead
+
+      const message = (error.error instanceof Error) ?
+        error.error.message :
+       `server returned code ${error.status} with body "${error.error}"`;
+
+      this.messenger.add(`${userMessage} ${message}`);
+
+      // Let app keep running but indicate failure.
+      return of(userMessage);
+    };
+  }
+
+  private showProgress(message: string) {
+    this.messenger.add(message);
+  }
+}

aio/content/examples/http/src/app/wiki/wiki-smart.component.ts

@@ -1,47 +0,0 @@
-/* tslint:disable: member-ordering forin */
-// #docplaster
-// #docregion
-import { Component, OnInit } from '@angular/core';
-
-// #docregion rxjs-imports
-import { Observable } from 'rxjs/Observable';
-import 'rxjs/add/operator/debounceTime';
-import 'rxjs/add/operator/distinctUntilChanged';
-import 'rxjs/add/operator/switchMap';
-
-// #docregion import-subject
-import { Subject } from 'rxjs/Subject';
-// #enddocregion import-subject
-
-import { WikipediaService } from './wikipedia.service';
-
-@Component({
-  selector: 'my-wiki-smart',
-  template: `
-    <h1>Smarter Wikipedia Demo</h1>
-    <p>Search when typing stops</p>
-    <input #term (keyup)="search(term.value)"/>
-    <ul>
-      <li *ngFor="let item of items | async">{{item}}</li>
-    </ul>`,
-  providers: [ WikipediaService ]
-})
-export class WikiSmartComponent implements OnInit {
-  items: Observable<string[]>;
-
-  constructor (private wikipediaService: WikipediaService) {}
-
-  // #docregion subject
-  private searchTermStream = new Subject<string>();
-  search(term: string) { this.searchTermStream.next(term); }
-  // #enddocregion subject
-
-  ngOnInit() {
-    // #docregion observable-operators
-    this.items = this.searchTermStream
-      .debounceTime(300)
-      .distinctUntilChanged()
-      .switchMap((term: string) => this.wikipediaService.search(term));
-    // #enddocregion observable-operators
-  }
-}

aio/content/examples/http/src/app/wiki/wiki.component.ts

@@ -1,26 +0,0 @@
-// #docregion
-import { Component }        from '@angular/core';
-import { Observable }       from 'rxjs/Observable';
-
-import { WikipediaService } from './wikipedia.service';
-
-@Component({
-  selector: 'my-wiki',
-  template: `
-    <h1>Wikipedia Demo</h1>
-    <p>Search after each keystroke</p>
-    <input #term (keyup)="search(term.value)"/>
-    <ul>
-      <li *ngFor="let item of items | async">{{item}}</li>
-    </ul>`,
-  providers: [ WikipediaService ]
-})
-export class WikiComponent {
-  items: Observable<string[]>;
-
-  constructor (private wikipediaService: WikipediaService) { }
-
-  search (term: string) {
-    this.items = this.wikipediaService.search(term);
-  }
-}

aio/content/examples/http/src/app/wiki/wikipedia.service.1.ts

@@ -1,26 +0,0 @@
-// Create the query string by hand
-// #docregion
-import { Injectable } from '@angular/core';
-import { Jsonp }      from '@angular/http';
-
-import 'rxjs/add/operator/map';
-
-@Injectable()
-export class WikipediaService {
-  constructor(private jsonp: Jsonp) { }
-
-  // TODO: Add error handling
-  search(term: string) {
-
-    let wikiUrl = 'http://en.wikipedia.org/w/api.php';
-
-    // #docregion query-string
-    let queryString =
-      `?search=${term}&action=opensearch&format=json&callback=JSONP_CALLBACK`;
-
-    return this.jsonp
-               .get(wikiUrl + queryString)
-               .map(response => <string[]> response.json()[1]);
-    // #enddocregion query-string
-  }
-}

aio/content/examples/http/src/app/wiki/wikipedia.service.ts

@@ -1,30 +0,0 @@
-// #docregion
-import { Injectable } from '@angular/core';
-import { Jsonp, URLSearchParams } from '@angular/http';
-
-import 'rxjs/add/operator/map';
-
-@Injectable()
-export class WikipediaService {
-  constructor(private jsonp: Jsonp) {}
-
-  search (term: string) {
-
-    let wikiUrl = 'http://en.wikipedia.org/w/api.php';
-
-    // #docregion search-parameters
-    let params = new URLSearchParams();
-    params.set('search', term); // the user's search value
-    params.set('action', 'opensearch');
-    params.set('format', 'json');
-    params.set('callback', 'JSONP_CALLBACK');
-    // #enddocregion search-parameters
-
-    // #docregion call-jsonp
-    // TODO: Add error handling
-    return this.jsonp
-               .get(wikiUrl, { search: params })
-               .map(response => <string[]> response.json()[1]);
-    // #enddocregion call-jsonp
-  }
-}

aio/content/examples/http/src/assets/config.json

@@ -0,0 +1,4 @@
+{
+  "heroesUrl": "api/heroes",
+  "textfile": "assets/textfile.txt"
+}

aio/content/examples/http/src/assets/textfile.txt

@@ -0,0 +1 @@
+This is the downloaded text file

aio/content/examples/http/src/browser-test-shim.js

@@ -0,0 +1,88 @@
+// BROWSER TESTING SHIM
+// Keep it in-sync with what karma-test-shim does
+// #docregion
+/*global jasmine, __karma__, window*/
+(function () {
+
+  Error.stackTraceLimit = 0; // "No stacktrace"" is usually best for app testing.
+
+  // Uncomment to get full stacktrace output. Sometimes helpful, usually not.
+  // Error.stackTraceLimit = Infinity; //
+
+  jasmine.DEFAULT_TIMEOUT_INTERVAL = 3000;
+
+  var baseURL = document.baseURI;
+  baseURL = baseURL + baseURL[baseURL.length-1] ? '' : '/';
+
+  System.config({
+    baseURL: baseURL,
+    // Extend usual application package list with test folder
+    packages: { 'testing': { main: 'index.js', defaultExtension: 'js' } },
+
+    // Assume npm: is set in `paths` in systemjs.config
+    // Map the angular testing umd bundles
+    map: {
+      '@angular/core/testing': 'npm:@angular/core/bundles/core-testing.umd.js',
+      '@angular/common/testing': 'npm:@angular/common/bundles/common-testing.umd.js',
+      '@angular/common/http/testing': 'npm:@angular/common/bundles/common-http-testing.umd.js',
+      '@angular/compiler/testing': 'npm:@angular/compiler/bundles/compiler-testing.umd.js',
+      '@angular/platform-browser/testing': 'npm:@angular/platform-browser/bundles/platform-browser-testing.umd.js',
+      '@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic-testing.umd.js',
+      '@angular/http/testing': 'npm:@angular/http/bundles/http-testing.umd.js',
+      '@angular/router/testing': 'npm:@angular/router/bundles/router-testing.umd.js',
+      '@angular/forms/testing': 'npm:@angular/forms/bundles/forms-testing.umd.js',
+    },
+  });
+
+  System.import('systemjs.config.js')
+    // .then(importSystemJsExtras) // not in this project
+    .then(initTestBed)
+    .then(initTesting);
+
+  /** Optional SystemJS configuration extras. Keep going w/o it */
+  function importSystemJsExtras(){
+    return System.import('systemjs.config.extras.js')
+    .catch(function(reason) {
+      console.log(
+        'Note: System.import could not load "systemjs.config.extras.js" where you might have added more configuration. It is an optional file so we will continue without it.'
+      );
+      console.log(reason);
+    });
+  }
+
+  function initTestBed(){
+    return Promise.all([
+      System.import('@angular/core/testing'),
+      System.import('@angular/platform-browser-dynamic/testing')
+    ])
+
+    .then(function (providers) {
+      var coreTesting    = providers[0];
+      var browserTesting = providers[1];
+
+      coreTesting.TestBed.initTestEnvironment(
+        browserTesting.BrowserDynamicTestingModule,
+        browserTesting.platformBrowserDynamicTesting());
+    })
+  }
+
+  // Import all spec files defined in the html (__spec_files__)
+  // and start Jasmine testrunner
+  function initTesting () {
+    console.log('loading spec files: '+__spec_files__.join(', '));
+    return Promise.all(
+      __spec_files__.map(function(spec) {
+        return System.import(spec);
+      })
+    )
+    //  After all imports load,  re-execute `window.onload` which
+    //  triggers the Jasmine test-runner start or explain what went wrong
+    .then(success, console.error.bind(console));
+
+    function success () {
+      console.log('Spec files loaded; starting Jasmine testrunner');
+      window.onload();
+    }
+  }
+
+  })();

aio/content/examples/http/src/index-specs.html

@@ -0,0 +1,4 @@
+<!--
+  Intentionally empty placeholder for Stackblitz.
+  Do not need index.html in zip-download either as you should run tests with `npm test`
+ -->

aio/content/examples/http/src/index.html

@@ -1,27 +1,14 @@
-<!DOCTYPE html>
-<!-- #docregion -->
+<!doctype html>
 <html lang="en">
-  <head>
-    <title>Angular Http Demo</title>
-    <base href="/">
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-    <link rel="stylesheet" href="styles.css">
-
-    <!-- Polyfills -->
-    <script src="node_modules/core-js/client/shim.min.js"></script>
-
-    <script src="node_modules/zone.js/dist/zone.js"></script>
-    <script src="node_modules/systemjs/dist/system.src.js"></script>
-
-    <script src="systemjs.config.js"></script>
-    <script>
-      System.import('main.js').catch(function(err){ console.error(err); });
-    </script>
-  </head>
-
-  <body>
-      <my-app></my-app>
-  </body>
+<head>
+  <meta charset="utf-8">
+  <title>HttpClient Demo</title>
+  <base href="/">
 
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="icon" type="image/x-icon" href="favicon.ico">
+</head>
+<body>
+  <app-root></app-root>
+</body>
 </html>

aio/content/examples/http/src/main-specs.ts

@@ -0,0 +1,44 @@
+import './testing/global-jasmine';
+import 'jasmine-core/lib/jasmine-core/jasmine-html.js';
+import 'jasmine-core/lib/jasmine-core/boot.js';
+
+declare var jasmine;
+
+import './polyfills';
+
+import 'zone.js/dist/async-test';
+import 'zone.js/dist/fake-async-test';
+import 'zone.js/dist/long-stack-trace-zone';
+import 'zone.js/dist/proxy.js';
+import 'zone.js/dist/sync-test';
+import 'zone.js/dist/jasmine-patch';
+
+import { getTestBed } from '@angular/core/testing';
+import {
+  BrowserDynamicTestingModule,
+  platformBrowserDynamicTesting
+} from '@angular/platform-browser-dynamic/testing';
+
+// Import spec files individually for Stackblitz
+import './app/heroes/heroes.service.spec.ts';
+import './testing/http-client.spec.ts';
+
+//
+bootstrap();
+
+//
+function bootstrap () {
+  if (window['jasmineRef']) {
+    location.reload();
+    return;
+  } else {
+    window.onload(undefined);
+    window['jasmineRef'] = jasmine.getEnv();
+  }
+
+  // First, initialize the Angular testing environment.
+  getTestBed().initTestEnvironment(
+    BrowserDynamicTestingModule,
+    platformBrowserDynamicTesting()
+  );
+}

aio/content/examples/http/src/test.css

@@ -0,0 +1 @@
+@import "~jasmine-core/lib/jasmine-core/jasmine.css"

aio/content/examples/http/src/testing/global-jasmine.ts

@@ -0,0 +1,3 @@
+import jasmineRequire from 'jasmine-core/lib/jasmine-core/jasmine.js';
+
+window['jasmineRequire'] = jasmineRequire;

aio/content/examples/http/src/testing/http-client.spec.ts

@@ -0,0 +1,192 @@
+// #docplaster
+// #docregion imports
+// Http testing module and mocking controller
+import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';
+
+// Other imports
+import { TestBed } from '@angular/core/testing';
+import { HttpClient, HttpErrorResponse } from '@angular/common/http';
+
+// #enddocregion imports
+import { HttpHeaders } from '@angular/common/http';
+
+interface Data {
+  name: string;
+}
+
+const testUrl = '/data';
+
+// #docregion setup
+describe('HttpClient testing', () => {
+  let httpClient: HttpClient;
+  let httpTestingController: HttpTestingController;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [ HttpClientTestingModule ]
+    });
+
+    // Inject the http service and test controller for each test
+    httpClient = TestBed.get(HttpClient);
+    httpTestingController = TestBed.get(HttpTestingController);
+  });
+  // #enddocregion setup
+  // #docregion afterEach
+  afterEach(() => {
+    // After every test, assert that there are no more pending requests.
+    httpTestingController.verify();
+  });
+  // #enddocregion afterEach
+  // #docregion setup
+  /// Tests begin ///
+  // #enddocregion setup
+  // #docregion get-test
+  it('can test HttpClient.get', () => {
+    const testData: Data = {name: 'Test Data'};
+
+    // Make an HTTP GET request
+    httpClient.get<Data>(testUrl)
+      .subscribe(data =>
+        // When observable resolves, result should match test data
+        expect(data).toEqual(testData)
+      );
+
+    // The following `expectOne()` will match the request's URL.
+    // If no requests or multiple requests matched that URL
+    // `expectOne()` would throw.
+    const req = httpTestingController.expectOne('/data');
+
+    // Assert that the request is a GET.
+    expect(req.request.method).toEqual('GET');
+
+    // Respond with mock data, causing Observable to resolve.
+    // Subscribe callback asserts that correct data was returned.
+    req.flush(testData);
+
+    // Finally, assert that there are no outstanding requests.
+    httpTestingController.verify();
+  });
+  // #enddocregion get-test
+  it('can test HttpClient.get with matching header', () => {
+    const testData: Data = {name: 'Test Data'};
+
+    // Make an HTTP GET request with specific header
+    httpClient.get<Data>(testUrl, {
+        headers: new HttpHeaders({'Authorization': 'my-auth-token'})
+      })
+      .subscribe(data =>
+        expect(data).toEqual(testData)
+      );
+
+      // Find request with a predicate function.
+    // #docregion predicate
+    // Expect one request with an authorization header
+    const req = httpTestingController.expectOne(
+      req => req.headers.has('Authorization')
+    );
+    // #enddocregion predicate
+    req.flush(testData);
+  });
+
+  it('can test multiple requests', () => {
+    let testData: Data[] = [
+      { name: 'bob' }, { name: 'carol' },
+      { name: 'ted' }, { name: 'alice' }
+    ];
+
+    // Make three requests in a row
+    httpClient.get<Data[]>(testUrl)
+      .subscribe(d => expect(d.length).toEqual(0, 'should have no data'));
+
+    httpClient.get<Data[]>(testUrl)
+      .subscribe(d => expect(d).toEqual([testData[0]], 'should be one element array'));
+
+    httpClient.get<Data[]>(testUrl)
+      .subscribe(d => expect(d).toEqual(testData, 'should be expected data'));
+
+    // #docregion multi-request
+    // get all pending requests that match the given URL
+    const requests = httpTestingController.match(testUrl);
+    expect(requests.length).toEqual(3);
+
+    // Respond to each request with different results
+    requests[0].flush([]);
+    requests[1].flush([testData[0]]);
+    requests[2].flush(testData);
+    // #enddocregion multi-request
+  });
+
+  // #docregion 404
+  it('can test for 404 error', () => {
+    const emsg = 'deliberate 404 error';
+
+    httpClient.get<Data[]>(testUrl).subscribe(
+      data => fail('should have failed with the 404 error'),
+      (error: HttpErrorResponse) => {
+        expect(error.status).toEqual(404, 'status');
+        expect(error.error).toEqual(emsg, 'message');
+      }
+    );
+
+    const req = httpTestingController.expectOne(testUrl);
+
+    // Respond with mock error
+    req.flush(emsg, { status: 404, statusText: 'Not Found' });
+  });
+  // #enddocregion 404
+
+  // #docregion network-error
+  it('can test for network error', () => {
+    const emsg = 'simulated network error';
+
+    httpClient.get<Data[]>(testUrl).subscribe(
+      data => fail('should have failed with the network error'),
+      (error: HttpErrorResponse) => {
+        expect(error.error.message).toEqual(emsg, 'message');
+      }
+    );
+
+    const req = httpTestingController.expectOne(testUrl);
+
+    // Create mock ErrorEvent, raised when something goes wrong at the network level.
+    // Connection timeout, DNS error, offline, etc
+    const errorEvent = new ErrorEvent('so sad', {
+      message: emsg,
+      // #enddocregion network-error
+      // The rest of this is optional and not used.
+      // Just showing that you could provide this too.
+      filename: 'HeroService.ts',
+      lineno: 42,
+      colno: 21
+    // #docregion network-error
+    });
+
+    // Respond with mock error
+    req.error(errorEvent);
+  });
+  // #enddocregion network-error
+
+  it('httpTestingController.verify should fail if HTTP response not simulated', () => {
+    // Sends request
+    httpClient.get('some/api').subscribe();
+
+    // verify() should fail because haven't handled the pending request.
+    expect(() => httpTestingController.verify()).toThrow();
+
+    // Now get and flush the request so that afterEach() doesn't fail
+    const req = httpTestingController.expectOne('some/api');
+    req.flush(null);
+  });
+
+  // Proves that verify in afterEach() really would catch error
+  // if test doesn't simulate the HTTP response.
+  //
+  // Must disable this test because can't catch an error in an afterEach().
+  // Uncomment if you want to confirm that afterEach() does the job.
+  // it('afterEach() should fail when HTTP response not simulated',() => {
+  //   // Sends request which is never handled by this test
+  //   httpClient.get('some/api').subscribe();
+  // });
+// #docregion setup
+});
+// #enddocregion setup

aio/content/examples/http/stackblitz.json

@@ -1,10 +1,11 @@
 {
   "description": "Http",
-  "basePath": "src/",
   "files":[
     "!**/*.d.ts",
     "!**/*.js",
-    "!**/*.[1].*"
+
+    "!src/testing/*.*",
+    "!src/index-specs.html"
   ],
-  "tags": ["http", "jsonp"]
+  "tags": ["http"]
 }

aio/content/examples/i18n/doc-files/messages.fr.xlf.html

@@ -41,29 +41,30 @@
       <!-- #enddocregion translated-plural -->
       <!-- #docregion translated-select -->
       <!-- #docregion translate-select-1 -->
-      <trans-unit id="52515023fc70c216ef291086c1962ff135a9fe13" datatype="html">
-        <source>The author is <x id="ICU" equiv-text="{gender, select, m {...} f {...} o {...}}"/></source>
-        <target>L'auteur est <x id="ICU" equiv-text="{gender, select, m {...} f {...} o {...}}"/></target>
+      </trans-unit>
+      <trans-unit id="f99f34ac9bd4606345071bd813858dec29f3b7d1" datatype="html">
+        <source>The author is <x id="ICU" equiv-text="{gender, select, male {...} female {...} other {...}}"/></source>
+        <target>L'auteur est <x id="ICU" equiv-text="{gender, select, male {...} female {...} other {...}}"/></target>
       </trans-unit>
       <!-- #enddocregion translate-select-1 -->
       <!-- #docregion translate-select-2 -->
-      <trans-unit id="4e6fd3f2bb3477e8ad2088f03257f6e1b8b515a5" datatype="html">
-        <source>{VAR_SELECT, select, m {male} f {female} o {other} }</source>
-        <target>{VAR_SELECT, select, m {un homme} f {une femme} o {autre} }</target>
+      <trans-unit id="eff74b75ab7364b6fa888f1cbfae901aaaf02295" datatype="html">
+        <source>{VAR_SELECT, select, male {male} female {female} other {other} }</source>
+        <target>{VAR_SELECT, select, male {un homme} female {une femme} other {autre} }</target>
       </trans-unit>
       <!-- #enddocregion translate-select-2 -->
       <!-- #enddocregion translated-select -->
       <!-- #docregion translate-nested -->
       <!-- #docregion translate-nested-1 -->
-      <trans-unit id="f7a55c9ef7c5b37147825a9041263305063e63e9" datatype="html">
+      <trans-unit id="972cb0cf3e442f7b1c00d7dab168ac08d6bdf20c" datatype="html">
         <source>Updated: <x id="ICU" equiv-text="{minutes, plural, =0 {...} =1 {...} other {...}}"/></source>
         <target>Mis à jour: <x id="ICU" equiv-text="{minutes, plural, =0 {...} =1 {...} other {...}}"/></target>
       </trans-unit>
       <!-- #enddocregion translate-nested-1 -->
       <!-- #docregion translate-nested-2 -->
-      <trans-unit id="80b5ac44661751e191225c0b1e000bceeeccb52c" datatype="html">
-        <source>{VAR_PLURAL, plural, =0 {just now} =1 {one minute ago} other {<x id="INTERPOLATION" equiv-text="{{minutes}}"/> minutes ago by {VAR_SELECT, select, m {male} f {female} o {other} }} }</source>
-        <target>{VAR_PLURAL, plural, =0 {à l'instant} =1 {il y a une minute} other {il y a <x id="INTERPOLATION" equiv-text="{{minutes}}"/> minutes par {VAR_SELECT, select, m {un homme} f {une femme} o {autre} }} }</target>
+      <trans-unit id="7151c2e67748b726f0864fc443861d45df21d706" datatype="html">
+        <source>{VAR_PLURAL, plural, =0 {just now} =1 {one minute ago} other {<x id="INTERPOLATION" equiv-text="{{minutes}}"/> minutes ago by {VAR_SELECT, select, male {male} female {female} other {other} }} }</source>
+        <target>{VAR_PLURAL, plural, =0 {à l'instant} =1 {il y a une minute} other {il y a <x id="INTERPOLATION" equiv-text="{{minutes}}"/> minutes par {VAR_SELECT, select, male {un homme} female {une femme} other {autre} }} }</target>
       </trans-unit>
       <!-- #enddocregion translate-nested-2 -->
       <!-- #enddocregion translate-nested -->

aio/content/examples/i18n/src/app/app.component.html

@@ -23,13 +23,13 @@
 <br><br>
 <button (click)="male()">&#9794;</button> <button (click)="female()">&#9792;</button> <button (click)="other()">&#9895;</button>
 <!--#docregion i18n-select-->
-<span i18n>The author is {gender, select, m {male} f {female} o {other}}</span>
+<span i18n>The author is {gender, select, male {male} female {female} other {other}}</span>
 <!--#enddocregion i18n-select-->
 <br><br>
 <!--#docregion i18n-nested-->
 <span i18n>Updated: {minutes, plural,
   =0 {just now}
   =1 {one minute ago}
-  other {{{minutes}} minutes ago by {gender, select, m {male} f {female} o {other}}}}
+  other {{{minutes}} minutes ago by {gender, select, male {male} female {female} other {other}}}}
 </span>
 <!--#enddocregion i18n-nested-->