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diff --git a/files/zh-cn/web/api/response/arraybuffer/index.html b/files/zh-cn/web/api/response/arraybuffer/index.html new file mode 100644 index 0000000000..48ec4e65a2 --- /dev/null +++ b/files/zh-cn/web/api/response/arraybuffer/index.html @@ -0,0 +1,150 @@ +--- +title: Response.arrayBuffer() +slug: Web/API/Response/arrayBuffer +translation_of: Web/API/Response/arrayBuffer +tags: + - API + - ArrayBuffer + - Fetch + - Method + - Reference + - Response +browser-compat: api.Response.arrayBuffer +--- +<p>{{APIRef("Fetch")}}{{ SeeCompatTable() }}</p> + +<p> {{domxref("Response")}}上的<strong><code>方法 arrayBuffer()</code></strong> 接受一个 {{domxref("Response")}} 流, 并等待其读取完成. 它返回一个 promise 实例, 并 resolve 一个 {{domxref("ArrayBuffer")}} 对象.</p> + +<h2 id="语法">语法</h2> + +<pre class="brush: js">response.arrayBuffer().then(function(buffer) { + // do something with buffer +)};</pre> + +<h3 id="参数">参数</h3> + +<p>无。</p> + +<h3 id="返回值">返回值</h3> + +<p>A promise that resolves with an {{domxref("ArrayBuffer")}}.</p> + +<h2 id="例子">例子</h2> + +<p>In our <a href="https://github.com/mdn/fetch-examples/tree/gh-pages/fetch-array-buffer">fetch array buffer example</a> (run <a href="http://mdn.github.io/fetch-examples/fetch-array-buffer/">fetch array buffer live</a>), we have a Play button. When pressed, the <code>getData()</code> function is run.</p> + +<p>In <code>getData()</code> we create a new request using the {{domxref("Request.Request")}} constructor, then use it to fetch an OGG music track. We also use {{domxref("AudioContext.createBufferSource")}} to create an audio buffer source. When the fetch is successful, we read an {{domxref("ArrayBuffer")}} out of the response using <code>arrayBuffer()</code>, decode the audio data using {{domxref("AudioContext.decodeAudioData")}}, set the decoded data as the audio buffer source's buffer (<code>source.buffer</code>), then connect the source up to the {{domxref("AudioContext.destination")}}.</p> + +<p>Once <code>getData()</code> has finished running, we start the audio source playing with <code>start(0)</code>, then disable the play button so it can't be clicked again when it is already playing (this would cause an error.)</p> + +<pre class="brush: js">function getData() { + source = audioCtx.createBufferSource(); + + var myRequest = new Request('viper.ogg'); + + fetch(myRequest).then(function(response) { + response.arrayBuffer().then(function(buffer) { + audioCtx.decodeAudioData(buffer, function(decodedData) { + source.buffer = decodedData; + source.connect(audioCtx.destination); + }); + }); + }); +}; + +// wire up buttons to stop and play audio + +play.onclick = function() { + getData(); + source.start(0); + play.setAttribute('disabled', 'disabled'); +}</pre> + +<h2 id="标准">标准</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">标准</th> + <th scope="col">状态</th> + <th scope="col">备注</th> + </tr> + <tr> + <td>{{SpecName('Fetch','#dom-body-arraybuffer','arrayBuffer()')}}</td> + <td>{{Spec2('Fetch')}}</td> + <td> </td> + </tr> + </tbody> +</table> + +<h2 id="浏览器兼容性">浏览器兼容性</h2> + +<p>{{ CompatibilityTable() }}</p> + +<div id="compat-desktop"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Chrome</th> + <th>Firefox (Gecko)</th> + <th>Internet Explorer</th> + <th>Opera</th> + <th>Safari (WebKit)</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{ CompatChrome(41) }}<sup>[1]</sup><br> + {{ CompatChrome(42) }}<br> + </td> + <td>34<sup>[1]</sup><br> + {{ CompatGeckoDesktop(39)}}</td> + <td>{{ CompatNo }}</td> + <td> + <p>28<sup>[1]</sup><br> + 29</p> + </td> + <td>{{ CompatNo }}</td> + </tr> + </tbody> +</table> +</div> + +<div id="compat-mobile"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Android</th> + <th>Firefox Mobile (Gecko)</th> + <th>Firefox OS (Gecko)</th> + <th>IE Phone</th> + <th>Opera Mobile</th> + <th>Safari Mobile</th> + <th>Chrome for Android</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{ CompatNo }}</td> + <td>{{ CompatNo }}</td> + <td>{{ CompatNo }}</td> + <td>{{ CompatNo }}</td> + <td>{{ CompatNo }}</td> + <td>{{ CompatNo }}</td> + <td>{{ CompatNo }}</td> + </tr> + </tbody> +</table> +</div> + +<p>[1] In Chrome 42, Firefox 34 and Opera 28 support for <code>arrayBuffer()</code> was hidden behind a preference.</p> + +<h2 id="参考">参考</h2> + +<ul> + <li><a href="/en-US/docs/Web/API/ServiceWorker_API">ServiceWorker API</a></li> + <li><a href="/en-US/docs/Web/HTTP/Access_control_CORS">HTTP access control (CORS)</a></li> + <li><a href="/en-US/docs/Web/HTTP">HTTP</a></li> +</ul> + +<div id="sVim-command" class="hidden">-- NORMAL --</div> |