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Diffstat (limited to 'files/zh-cn/web/http/status/412/index.html')
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diff --git a/files/zh-cn/web/http/status/412/index.html b/files/zh-cn/web/http/status/412/index.html new file mode 100644 index 0000000000..c06e8824e9 --- /dev/null +++ b/files/zh-cn/web/http/status/412/index.html @@ -0,0 +1,47 @@ +--- +title: 412 Precondition Failed +slug: Web/HTTP/Status/412 +tags: + - Error + - HTTP + - 参考 + - 状态码 +translation_of: Web/HTTP/Status/412 +--- +<div>{{HTTPSidebar}}</div> + +<p>在 HTTP 协议中,响应状态码 <strong>412 Precondition Failed</strong>(先决条件失败)表示客户端错误,意味着对于目标资源的访问请求被拒绝。这通常发生于采用除 {{HTTPMethod("GET")}} 和 {{HTTPMethod("HEAD")}} 之外的方法进行条件请求时,由首部字段 {{HTTPHeader("If-Unmodified-Since")}} 或 {{HTTPHeader("If-None-Match")}} 规定的先决条件不成立的情况下。这时候,请求的操作——通常是上传或修改文件——无法执行,从而返回该错误状态码。</p> + +<h2 id="状态码">状态码</h2> + +<pre class="syntaxbox">412 Precondition Failed</pre> + +<h2 id="规范">规范</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">Specification</th> + <th scope="col">Title</th> + </tr> + <tr> + <td>{{RFC("7232", "412 Precondition Failed" , "4.2")}}</td> + <td>Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests</td> + </tr> + </tbody> +</table> + +<h2 id="浏览器兼容性">浏览器兼容性</h2> + +<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p> + +<p>{{Compat("http.status.412")}}</p> + +<h2 id="参见">参见</h2> + +<ul> + <li>{{HTTPStatus("304")}}</li> + <li>{{HTTPHeader("If-Unmodified-Since")}}</li> + <li>{{HTTPHeader("If-None-Match")}}</li> + <li>{{HTTPStatus("428")}}</li> +</ul> |
