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+---
+title: Cache.put()
+slug: Web/API/Cache/put
+translation_of: Web/API/Cache/put
+---
+<p>{{APIRef("Service Workers API")}}{{SeeCompatTable}}</p>
+
+<p><span class="seoSummary">{{domxref("Cache")}} 接口的  <strong><code>put()</code></strong> 方法 允许将键/值对添加到当前的 {{domxref("Cache")}} 对象中.</span></p>
+
+<p><span class="seoSummary">通常，你只想 </span>{{domxref("GloblFetch.fetch","fetch()")}} 一个或多个请求，然后直接添加结果到cache中。这种情况下，最好使用 {{domxref("Cache.add","Cache.add()")}}/{{domxref("Cache.addAll","Cache.addAll()")}}，因为它们是一个或者多个这些操作的便捷方法。</p>
+
+<pre class="brush: js">fetch(url).then(function(response) {
+  if (!response.ok) {
+    throw new TypeError('Bad response status');
+  }
+  return cache.put(url, response);
+})
+
+</pre>
+
+<div class="note">
+<p><strong>注意</strong>: <code>put()</code> 将覆盖先前存储在匹配请求的cache中的任何键/值对。</p>
+</div>
+
+<div class="note">
+<p><strong>注意</strong>: {{domxref("Cache.add")}}/{{domxref("Cache.addAll")}} 不会缓存 <code>Response.status</code> 值不在200范围内的响应，而 {{domxref("Cache.put")}} 允许你存储任何请求/响应对。因此，{{domxref("Cache.add")}}/{{domxref("Cache.addAll")}} 不能用于不透明的响应，而 {{domxref("Cache.put")}} 可以。</p>
+</div>
+
+<div class="note">
+<p><strong>注意</strong>: 当响应主体完全写入磁盘时，初始Cache执行 (在 Blink 和 Gecko中) resolve {{domxref("Cache.add")}}、{{domxref("Cache.addAll")}} 和 {{domxref("Cache.put")}} promise.  更新的规范版本中声明：即使响应主体仍在流式传输，一旦条目被记录到数据库中，浏览器就可以 resolve promise.</p>
+</div>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">cache.put(request, response).then(function() {
+  // request/response pair has been added to the cache
+});
+</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>request</dt>
+ <dd>The {{domxref("Request")}} you want to add to the cache.</dd>
+ <dt>response</dt>
+ <dd>The {{domxref("Response")}} you want to match up to the request.</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<p>A {{jsxref("Promise")}} that resolves with void.</p>
+
+<div class="note">
+<p><strong>Note</strong>: The promise will reject with a <code>TypeError</code> if the URL scheme is not <code>http</code> or <code>https</code>.</p>
+</div>
+
+<h2 id="示例" style="line-height: 30px; font-size: 2.14285714285714rem;">示例</h2>
+
+<p>This example is from the MDN <a href="https://github.com/mdn/sw-test/">sw-test example</a> (see <a href="https://mdn.github.io/sw-test/">sw-test running live</a>). Here we wait for a {{domxref("FetchEvent")}} to fire. We construct a custom response like so:</p>
+
+<ol>
+ <li>Check whether a match for the request is found in the {{domxref("CacheStorage")}} using {{domxref("CacheStorage.match","CacheStorage.match()")}}. If so, serve that.</li>
+ <li>If not, open the <code>v1</code> cache using <code>open()</code>, put the default network request in the cache using {{domxref("Cache.put","Cache.put()")}} and return a clone of the default network request using <code>return response.clone()</code>. Clone is needed because <code>put()</code> consumes the response body.</li>
+ <li>If this fails (e.g., because the network is down), return a fallback response.</li>
+</ol>
+
+<pre class="brush: js">var response;
+var cachedResponse = caches.match(event.request).catch(function() {
+  return fetch(event.request);
+}).then(function(r) {
+  response = r;
+  caches.open('v1').then(function(cache) {
+    cache.put(event.request, response);
+  });
+  return response.clone();
+}).catch(function() {
+  return caches.match('/sw-test/gallery/myLittleVader.jpg');
+});</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('Service Workers', '#cache', 'Cache')}}</td>
+   <td>{{Spec2('Service Workers')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+
+
+<p>{{Compat("api.Cache.put")}}</p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker_API/Using_Service_Workers">Using Service Workers</a></li>
+ <li>{{domxref("Cache")}}</li>
+ <li>{{domxref("WorkerGlobalScope.caches")}}</li>
+</ul>