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项目初始化</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>ts-axios 基础功能实现</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/blog/pages/1313dae575f6dddf/" class="sidebar-link">处理请求 url 参数</a></li><li><a href="/blog/pages/887cd0918e2543d8/" class="sidebar-link">处理请求 body 数据</a></li><li><a href="/blog/pages/35c0ec1bb0b0faaf/" class="sidebar-link">处理请求 header</a></li><li><a href="/blog/pages/a57debe141e1e4f4/" aria-current="page" class="active sidebar-link">获取响应数据</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header level2"><a href="/blog/pages/a57debe141e1e4f4/#需求分析" class="sidebar-link">需求分析</a></li><li class="sidebar-sub-header level2"><a href="/blog/pages/a57debe141e1e4f4/#定义接口类型" class="sidebar-link">定义接口类型</a></li><li class="sidebar-sub-header level2"><a href="/blog/pages/a57debe141e1e4f4/#实现获取响应数据逻辑" class="sidebar-link">实现获取响应数据逻辑</a></li><li class="sidebar-sub-header level2"><a href="/blog/pages/a57debe141e1e4f4/#demo-编写" class="sidebar-link">demo 编写</a></li></ul></li><li><a href="/blog/pages/927161662ca32c24/" class="sidebar-link">处理响应 header</a></li><li><a href="/blog/pages/922cb4268499dc3f/" class="sidebar-link">处理响应 data</a></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 异常情况处理</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 接口扩展</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 拦截器实现</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 配置化实现</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 取消功能实现</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 更多功能实现</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 单元测试</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 部署与发布</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <div><main class="page"><div class="theme-vdoing-wrapper "><div class="articleInfo-wrap" data-v-06970110><div class="articleInfo" data-v-06970110><ul class="breadcrumbs" data-v-06970110><li data-v-06970110><a href="/blog/" title="首页" class="iconfont icon-home router-link-active" data-v-06970110></a></li> <li data-v-06970110><a href="/blog/note/typescript-axios/#《TypeScript 从零实现 axios》" data-v-06970110>《TypeScript 从零实现 axios》</a></li><li data-v-06970110><a href="/blog/note/typescript-axios/#ts-axios 基础功能实现" data-v-06970110>ts-axios 基础功能实现</a></li></ul> <div class="info" data-v-06970110><div title="作者" class="author iconfont icon-touxiang" data-v-06970110><a href="javascript:;" data-v-06970110>HuangYi</a></div> <div title="创建时间" class="date iconfont icon-riqi" data-v-06970110><a href="javascript:;" data-v-06970110>2020-01-05</a></div> <!----></div></div></div> <!----> <div class="content-wrapper"><div class="right-menu-wrapper"><div class="right-menu-margin"><div class="right-menu-title">目录</div> <div class="right-menu-content"></div></div></div> <h1><img src="data:image/png;base64,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">获取响应数据<!----></h1> <div class="theme-vdoing-content content__default"><h1 id="获取响应数据"><a href="#获取响应数据" class="header-anchor">#</a> 获取响应数据</h1> <h2 id="需求分析"><a href="#需求分析" class="header-anchor">#</a> 需求分析</h2> <p>在前面的章节中，我们发送的请求都可以从网络层面接收到服务端返回的数据，但是代码层面并没有做任何关于返回数据的处理。我们希望能处理服务端响应的数据，并支持 Promise 链式调用的方式，如下：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token function">axios</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
- method<span class="token operator">:</span> <span class="token string">'post'</span><span class="token punctuation">,</span>
- url<span class="token operator">:</span> <span class="token string">'/base/post'</span><span class="token punctuation">,</span>
- data<span class="token operator">:</span> <span class="token punctuation">{</span>
- a<span class="token operator">:</span> <span class="token number">1</span><span class="token punctuation">,</span>
- b<span class="token operator">:</span> <span class="token number">2</span>
- <span class="token punctuation">}</span>
- <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token punctuation">(</span>res<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
- <span class="token builtin">console</span><span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>res<span class="token punctuation">)</span>
- <span class="token punctuation">}</span><span class="token punctuation">)</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br></div></div><p>我们可以拿到 <code>res</code> 对象，并且我们希望该对象包括：服务端返回的数据 <code>data</code>，HTTP 状态码<code>status</code>，状态消息 <code>statusText</code>，响应头 <code>headers</code>、请求配置对象 <code>config</code> 以及请求的 <code>XMLHttpRequest</code> 对象实例 <code>request</code>。</p> <h2 id="定义接口类型"><a href="#定义接口类型" class="header-anchor">#</a> 定义接口类型</h2> <p>根据需求，我们可以定义一个 <code>AxiosResponse</code> 接口类型，如下：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token keyword">export</span> <span class="token keyword">interface</span> <span class="token class-name">AxiosResponse</span> <span class="token punctuation">{</span>
- data<span class="token operator">:</span> <span class="token builtin">any</span>
- status<span class="token operator">:</span> <span class="token builtin">number</span>
- statusText<span class="token operator">:</span> <span class="token builtin">string</span>
- headers<span class="token operator">:</span> <span class="token builtin">any</span>
- config<span class="token operator">:</span> AxiosRequestConfig
- request<span class="token operator">:</span> <span class="token builtin">any</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br></div></div><p>另外，<code>axios</code> 函数返回的是一个 <code>Promise</code> 对象，我们可以定义一个 <code>AxiosPromise</code> 接口，它继承于 <code>Promise<AxiosResponse></code> 这个泛型接口：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token keyword">export</span> <span class="token keyword">interface</span> <span class="token class-name">AxiosPromise</span> <span class="token keyword">extends</span> <span class="token class-name"><span class="token builtin">Promise</span><span class="token operator"><</span>AxiosResponse<span class="token operator">></span></span> <span class="token punctuation">{</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><p>这样的话，当 <code>axios</code> 返回的是 <code>AxiosPromise</code> 类型，那么 <code>resolve</code> 函数中的参数就是一个 <code>AxiosResponse</code> 类型。</p> <p>对于一个 AJAX 请求的 <code>response</code>，我们是可以指定它的响应的数据类型的，通过设置 <code>XMLHttpRequest</code> 对象的 <a href="https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/responseType" target="_blank" rel="noopener noreferrer"><code>responseType</code><span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a> 属性，于是我们可以给 <code>AxiosRequestConfig</code> 类型添加一个可选属性：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token keyword">export</span> <span class="token keyword">interface</span> <span class="token class-name">AxiosRequestConfig</span> <span class="token punctuation">{</span>
- <span class="token comment">// ...</span>
- responseType<span class="token operator">?</span><span class="token operator">:</span> XMLHttpRequestResponseType
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p><code>responseType</code> 的类型是一个 <code>XMLHttpRequestResponseType</code> 类型，它的定义是 <code>"" | "arraybuffer" | "blob" | "document" | "json" | "text"</code> 字符串字面量类型。</p> <h2 id="实现获取响应数据逻辑"><a href="#实现获取响应数据逻辑" class="header-anchor">#</a> 实现获取响应数据逻辑</h2> <p>首先我们要在 <code>xhr</code> 函数添加 <a href="https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/onreadystatechange" target="_blank" rel="noopener noreferrer"><code>onreadystatechange</code><span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a> 事件处理函数，并且让 <code>xhr</code> 函数返回的是 <code>AxiosPromise</code> 类型。</p> <p><code>xhr.ts</code>：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token keyword">function</span> <span class="token function">xhr</span><span class="token punctuation">(</span>config<span class="token operator">:</span> AxiosRequestConfig<span class="token punctuation">)</span><span class="token operator">:</span> AxiosPromise <span class="token punctuation">{</span>
- <span class="token keyword">return</span> <span class="token keyword">new</span> <span class="token class-name"><span class="token builtin">Promise</span></span><span class="token punctuation">(</span><span class="token punctuation">(</span>resolve<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
- <span class="token keyword">const</span> <span class="token punctuation">{</span> data <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">,</span> url<span class="token punctuation">,</span> method <span class="token operator">=</span> <span class="token string">'get'</span><span class="token punctuation">,</span> headers<span class="token punctuation">,</span> responseType <span class="token punctuation">}</span> <span class="token operator">=</span> config
- <span class="token keyword">const</span> request <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">XMLHttpRequest</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
- <span class="token keyword">if</span> <span class="token punctuation">(</span>responseType<span class="token punctuation">)</span> <span class="token punctuation">{</span>
- request<span class="token punctuation">.</span>responseType <span class="token operator">=</span> responseType
- <span class="token punctuation">}</span>
- request<span class="token punctuation">.</span><span class="token function">open</span><span class="token punctuation">(</span>method<span class="token punctuation">.</span><span class="token function">toUpperCase</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> url<span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">)</span>
- request<span class="token punctuation">.</span><span class="token function-variable function">onreadystatechange</span> <span class="token operator">=</span> <span class="token keyword">function</span> <span class="token function">handleLoad</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
- <span class="token keyword">if</span> <span class="token punctuation">(</span>request<span class="token punctuation">.</span>readyState <span class="token operator">!==</span> <span class="token number">4</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
- <span class="token keyword">return</span>
- <span class="token punctuation">}</span>
- <span class="token keyword">const</span> responseHeaders <span class="token operator">=</span> request<span class="token punctuation">.</span><span class="token function">getAllResponseHeaders</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
- <span class="token keyword">const</span> responseData <span class="token operator">=</span> responseType <span class="token operator">&&</span> responseType <span class="token operator">!==</span> <span class="token string">'text'</span> <span class="token operator">?</span> request<span class="token punctuation">.</span>response <span class="token operator">:</span> request<span class="token punctuation">.</span>responseText
- <span class="token keyword">const</span> response<span class="token operator">:</span> AxiosResponse <span class="token operator">=</span> <span class="token punctuation">{</span>
- data<span class="token operator">:</span> responseData<span class="token punctuation">,</span>
- status<span class="token operator">:</span> request<span class="token punctuation">.</span>status<span class="token punctuation">,</span>
- statusText<span class="token operator">:</span> request<span class="token punctuation">.</span>statusText<span class="token punctuation">,</span>
- headers<span class="token operator">:</span> responseHeaders<span class="token punctuation">,</span>
- config<span class="token punctuation">,</span>
- request
- <span class="token punctuation">}</span>
- <span class="token function">resolve</span><span class="token punctuation">(</span>response<span class="token punctuation">)</span>
- <span class="token punctuation">}</span>
- Object<span class="token punctuation">.</span><span class="token function">keys</span><span class="token punctuation">(</span>headers<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">forEach</span><span class="token punctuation">(</span><span class="token punctuation">(</span>name<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
- <span class="token keyword">if</span> <span class="token punctuation">(</span>data <span class="token operator">===</span> <span class="token keyword">null</span> <span class="token operator">&&</span> name<span class="token punctuation">.</span><span class="token function">toLowerCase</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">===</span> <span class="token string">'content-type'</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
- <span class="token keyword">delete</span> headers<span class="token punctuation">[</span>name<span class="token punctuation">]</span>
- <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
- request<span class="token punctuation">.</span><span class="token function">setRequestHeader</span><span class="token punctuation">(</span>name<span class="token punctuation">,</span> headers<span class="token punctuation">[</span>name<span class="token punctuation">]</span><span class="token punctuation">)</span>
- <span class="token punctuation">}</span>
- <span class="token punctuation">}</span><span class="token punctuation">)</span>
- request<span class="token punctuation">.</span><span class="token function">send</span><span class="token punctuation">(</span>data<span class="token punctuation">)</span>
- <span class="token punctuation">}</span><span class="token punctuation">)</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br></div></div><p>注意，我们这里还判断了如果 <code>config</code> 中配置了 <code>responseType</code>，我们把它设置到 <code>request.responseType</code> 中。在 <code>onreadystatechange</code> 事件函数中，我们构造了 <code>AxiosResponse</code> 类型的 <code>reponse</code> 对象，并把它 <code>resolve</code> 出去。</p> <p>修改了 <code>xhr</code> 函数，我们同样也要对应修改 <code>axios</code> 函数：</p> <p><code>index.ts</code>：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token keyword">function</span> <span class="token function">axios</span><span class="token punctuation">(</span>config<span class="token operator">:</span> AxiosRequestConfig<span class="token punctuation">)</span><span class="token operator">:</span> AxiosPromise <span class="token punctuation">{</span>
- <span class="token function">processConfig</span><span class="token punctuation">(</span>config<span class="token punctuation">)</span>
- <span class="token keyword">return</span> <span class="token function">xhr</span><span class="token punctuation">(</span>config<span class="token punctuation">)</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>这样我们就实现了 <code>axios</code> 函数的 Promise 化。</p> <h2 id="demo-编写"><a href="#demo-编写" class="header-anchor">#</a> demo 编写</h2> <p>我们在 <code>examples/base/app.ts</code> 文件中添加 2 段代码：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token function">axios</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
- method<span class="token operator">:</span> <span class="token string">'post'</span><span class="token punctuation">,</span>
- url<span class="token operator">:</span> <span class="token string">'/base/post'</span><span class="token punctuation">,</span>
- data<span class="token operator">:</span> <span class="token punctuation">{</span>
- a<span class="token operator">:</span> <span class="token number">1</span><span class="token punctuation">,</span>
- b<span class="token operator">:</span> <span class="token number">2</span>
- <span class="token punctuation">}</span>
- <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token punctuation">(</span>res<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
- <span class="token builtin">console</span><span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>res<span class="token punctuation">)</span>
- <span class="token punctuation">}</span><span class="token punctuation">)</span>
- <span class="token function">axios</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
- method<span class="token operator">:</span> <span class="token string">'post'</span><span class="token punctuation">,</span>
- url<span class="token operator">:</span> <span class="token string">'/base/post'</span><span class="token punctuation">,</span>
- responseType<span class="token operator">:</span> <span class="token string">'json'</span><span class="token punctuation">,</span>
- data<span class="token operator">:</span> <span class="token punctuation">{</span>
- a<span class="token operator">:</span> <span class="token number">3</span><span class="token punctuation">,</span>
- b<span class="token operator">:</span> <span class="token number">4</span>
- <span class="token punctuation">}</span>
- <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token punctuation">(</span>res<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
- <span class="token builtin">console</span><span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>res<span class="token punctuation">)</span>
- <span class="token punctuation">}</span><span class="token punctuation">)</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br></div></div><p>我们打开浏览器运行 demo，看一下结果，发现我们可以正常 log 出这个 <code>res</code> 变量，它包含 <code>AxiosResponse</code> 类型中定义的那些属性，不过我们发现 2 个小问题：第一个是 <code>headers</code> 属性是一个字符串，我们需要把它解析成对象类型；第二个是在第一个请求中，得到的数据是一个 JSON 字符串，我们也需要把它转换成对象类型。</p> <p>那么下一小节，我们将来解决第一个问题，对于响应的 <code>header</code> 做处理。</p></div></div> <div class="page-edit"><div class="edit-link"><a href="https://github.com/heBody/blog/edit/master/docs/《TypeScript 从零实现 axios》/04.ts-axios 基础功能实现/04.获取响应数据.md" target="_blank" rel="noopener noreferrer">编辑</a> <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></div> <div class="tags"><a href="/blog/tags/?tag=TypeScript" title="标签">#TypeScript</a></div> <div class="last-updated"><span class="prefix">上次更新:</span> <span class="time">2022/12/14, 19:36:42</span></div></div> <div class="page-nav-wapper"><div class="page-nav-centre-wrap"><a href="/blog/pages/35c0ec1bb0b0faaf/" class="page-nav-centre page-nav-centre-prev"><div class="tooltip">处理请求 header</div></a> <a href="/blog/pages/927161662ca32c24/" class="page-nav-centre page-nav-centre-next"><div class="tooltip">处理响应 header</div></a></div> <div class="page-nav"><p class="inner"><span class="prev">
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