more link tweaking

src/site/docs/tutorials/fetchdata/index.markdown

 ---
 layout: default
 title: "Fetch Data Dynamically"
 description: "Use HttpRequest to fetch data from a file or a server."
 has-permalinks: true
 tutorial:
   id: fetchdata
-next: forms
+next: forms/
 next-title: "Get Input from a Form"
-prev: custom-elements
+prev: custom-elements/
 prev-title: "Define a Custom DOM Tag"
 ---
 
 {% capture whats_the_point %}
 
 * Data on the web is often formatted in JSON.
 * JSON is text based and human readable.
 * The dart:json library provides support for JSON.
 * Use HttpRequest to dynamically load data.
 
@@ skipping 26 matching lines @@
 {% endcapture %}
 
 {% capture content %}
 
 <div class="tute-target-title">
 <h1>{{page.title}}</h1>
 <h3>Get data from a file or server.</h3>
 </div>
 
 Web applications often use
-<a href="http://www.json.org" target="_blank">JSON</a> (JavaScript Object Notation)
+<a href="http://www.json.org/" target="_blank">JSON</a> (JavaScript Object Notation)
 to pass data between clients and servers.
 Data can be _serialized_ into a JSON string,
 which is then passed between a client and server,
 and revived as an object at its destination.
 This target shows you how to use functions in the
-<a href="http://api.dartlang.org/dart_json.html"
+<a href="https://api.dartlang.org/dart_json.html"
    target="_blank">dart:json</a>
 library to produce and consume JSON data.
 Because JSON data is typically loaded dynamically,
 this target also shows how a web app
 can use an HTTP request to get data from an HTTP server.
 For web apps,
 HTTP requests are served by the browser in which the app is running,
 and thus are subject to the browser's security restrictions.
 
 * [About JSON](#about-json)
@@ skipping 13 matching lines @@
 can be serialized and represented by strings.
 
 **Try it!**
 The app running below, `its_all_about_you`,
 displays the JSON string for data of various types.
 Change the values of the input elements
 and check out the JSON format for each data type.
 
 <iframe class="running-app-frame"
         style="height:500px;width:700px;"
-        src="http://dart-lang.github.com/dart-tutorials-samples/web/target09/its_all_about_you/web/out/its_all_about_you.html">
+        src="http://dart-lang.github.io/dart-tutorials-samples/web/target09/its_all_about_you/web/out/its_all_about_you.html">
 </iframe>
 
 The complete source code is available on github:
 <a href="https://github.com/dart-lang/dart-tutorials-samples/tree/master/web/target09/its_all_about_you"
    target="_blank">its_all_about_you</a>.
 Because this application uses the Web UI package,
 you need to compile as described in
-<a href="/docs/tutorials/web_ui/">Target 6: Get Started with Web UI</a>.
+<a href="/docs/tutorials/web-ui/">Target 6: Get Started with Web UI</a>.
 
 The dart:json library contains two top-level functions
 for working with JSON strings:
 
 | dart:json function | Description |
 |---|---|
-| <a href="http://api.dartlang.org/dart_json.html" target="_blank">parse()</a> | Builds Dart objects from a string containing JSON data. |
-| <a href="http://api.dartlang.org/dart_json.html" target="_blank">stringify()</a> |  Serializes a Dart object into a JSON string. |
+| <a href="https://api.dartlang.org/dart_json.html" target="_blank">parse()</a> | Builds Dart objects from a string containing JSON data. |
+| <a href="https://api.dartlang.org/dart_json.html" target="_blank">stringify()</a> |  Serializes a Dart object into a JSON string. |
 {: .table}
 
 The parse() and stringify() functions can handle these Dart types automatically:
 <ul>
 <li> num</li>
 <li> String</li>
 <li> bool</li>
 <li> null</li>
 <li> List</li>
 <li> Map</li>
@@ skipping 142 matching lines @@
 which uses headers in an HTTP request
 to ask for and receive permission.
 CORS is server-specific and not yet widely used.
 </aside>
 
 The SDK provides these useful classes for
 formulating URIs and making HTTP requests:
 
 | Dart code | Library | Description |
 |---|---|
-| <a href="http://api.dartlang.org/dart_uri/Uri.html" target="_blank">Uri</a> | dart:uri | An object representing a URI. |
-| <a href="http://api.dartlang.org/dart_html/HttpRequest.html" target="_blank">HttpRequest</a> |  dart:html | Client-side HTTP request object. For use in web apps. |
-| <a href="http://api.dartlang.org/dart_io/HttpRequest.html" target="_blank">HttpRequest</a> |  dart:io | Server-side HTTP request object. Does not work in web apps. |
+| <a href="https://api.dartlang.org/dart_uri/Uri.html" target="_blank">Uri</a> | dart:uri | An object representing a URI. |
+| <a href="https://api.dartlang.org/dart_html/HttpRequest.html" target="_blank">HttpRequest</a> |  dart:html | Client-side HTTP request object. For use in web apps. |
+| <a href="https://api.dartlang.org/dart_io/HttpRequest.html" target="_blank">HttpRequest</a> |  dart:io | Server-side HTTP request object. Does not work in web apps. |
 {: .table}
 
 ##Using the getString() function to load a file {#using-getString-function}
 
 One useful HTTP request your web app *can* make is a GET request
 for a data file served from the same origin as the app.
 The example below,
 `portmanteaux_simple`, includes a data file
 called `portmanteaux_simple.json` that contains a JSON-formatted list of words.
 When you click the button,
 the app makes a GET request of the server
 and loads the file.
 
 **Try it!** Click the button.
 
 <iframe class="running-app-frame"
         style="height:400px;width:300px;"
-        src="http://dart-lang.github.com/dart-tutorials-samples/web/target09/portmanteaux_simple/web/portmanteaux_simple.html">
+        src="http://dart-lang.github.io/dart-tutorials-samples/web/target09/portmanteaux_simple/web/portmanteaux_simple.html">
 </iframe>
 
 You can find the complete source code for this sample on github at
-<a href="http://github.com/dart-lang/dart-tutorials-samples/tree/master/web/target09/portmanteaux_simple/"
+<a href="https://github.com/dart-lang/dart-tutorials-samples/tree/master/web/target09/portmanteaux_simple/"
    target="_blank">portmanteaux_simple</a>.
 
 This program uses a convenience method,
 `getString()`,
 provided by the HttpRequest class
 to request the file from the server.
 
 ![Use the getString() function to make a request](images/getstringfunction.png)
 
 The getString() method uses a Future object to handle the request.
@@ skipping 62 matching lines @@
 you need to create an HttpRequest object,
 configure its header and other information,
 and use the `send()` method to make the request.
 
 This section looks at a new
 version of the portmanteaux example
 that has been rewritten
 to use an explicitly constructed HttpRequest object.
 You can find the complete source code for the modified version
 on github at
-<a href="http://github.com/dart-lang/dart-tutorials-samples/tree/master/web/target09/portmanteaux/"
+<a href="https://github.com/dart-lang/dart-tutorials-samples/tree/master/web/target09/portmanteaux/"
    target="_blank">portmanteaux</a>.
 
 ###Setting up the HttpRequest object
 
 The mouse-click handler for the button
 creates an HttpRequest object,
 configures it with a URI and callback function,
 and then sends the request.
 Let's take a look at the Dart code:
 
@@ skipping 39 matching lines @@
 the code easily converts the JSON-formatted list of words
 to a Dart list of strings,
 creates a new LIElement for each one,
 and adds it to the &lt;ul&gt; element on the page.
 
 ![Getting the response text from an HTTP GET request](images/portmanteaux-callback.png)
 
 ###Populating the UI from JSON
 
 The data file in the portmanteaux example,
-<a href="http://raw.github.com/dart-lang/dart-tutorials-samples/master/web/target09/portmanteaux/web/portmanteaux.json"
+<a href="https://github.com/dart-lang/dart-tutorials-samples/master/web/target09/portmanteaux/web/portmanteaux.json"
    target="_blank">portmanteaux.json</a>,
 contains a JSON-formatted list of strings.
 
 {% highlight dart %}
 [
   "portmanteau", "fantabulous", "spork", "smog",
   "spanglish", "gerrymander", "turducken", "stagflation",
   "Brangelina", "freeware", "oxbridge", "palimony",
   "brunch", "blog", "chortle", "Hassenpfeffer", "Schnitzelbank"
 ]
@@ skipping 12 matching lines @@
 
 Check out Chris Buckett's article,
 <a href="/articles/json-web-service/"
    target="_blank">Using Dart with JSON Web Services</a>,
 for more information and an example with source code for both
 client and server programs.
 
 {% endcapture %}
 
 {% include tutorial.html %}