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  25.     <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></nav>  <ul class="sidebar-links"><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>初识 TypeScript</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>TypeScript 常用语法</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 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"><span>ts-axios 基础功能实现</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>ts-axios 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 open"><span>ts-axios 配置化实现</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/blog/pages/937e4de6b81edeca/" class="sidebar-link">合并配置的设计与实现</a></li><li><a href="/blog/pages/f5b627bfebba87fc/" class="sidebar-link">请求和响应配置化</a></li><li><a href="/blog/pages/7b49658c26f613bf/" aria-current="page" class="active sidebar-link">扩展 create 静态接口</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header level2"><a href="/blog/pages/7b49658c26f613bf/#需求分析" class="sidebar-link">需求分析</a></li><li class="sidebar-sub-header level2"><a href="/blog/pages/7b49658c26f613bf/#静态方法扩展" class="sidebar-link">静态方法扩展</a></li><li class="sidebar-sub-header level2"><a href="/blog/pages/7b49658c26f613bf/#demo-编写" class="sidebar-link">demo 编写</a></li></ul></li></ul></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 配置化实现" data-v-06970110>ts-axios 配置化实现</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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">扩展 create 静态接口<!----></h1>  <div class="theme-vdoing-content content__default"><h1 id="扩展-axios-create-静态接口"><a href="#扩展-axios-create-静态接口" class="header-anchor">#</a> 扩展 axios.create 静态接口</h1> <h2 id="需求分析"><a href="#需求分析" class="header-anchor">#</a> 需求分析</h2> <p>目前为止，我们的 axios 都是一个单例，一旦我们修改了 axios 的默认配置，会影响所有的请求。我们希望提供了一个 <code>axios.create</code> 的静态接口允许我们创建一个新的 <code>axios</code> 实例，同时允许我们传入新的配置和默认配置合并，并做为新的默认配置。</p> <p>举个例子：</p> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token keyword">const</span> instance <span class="token operator">=</span> axios<span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    26. 

  26.   transformRequest<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token punctuation">(</span><span class="token keyword">function</span><span class="token punctuation">(</span>data<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    27. 

  27.     <span class="token keyword">return</span> qs<span class="token punctuation">.</span><span class="token function">stringify</span><span class="token punctuation">(</span>data<span class="token punctuation">)</span>
    28. 

  28.   <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token operator">...</span><span class="token punctuation">(</span>axios<span class="token punctuation">.</span>defaults<span class="token punctuation">.</span>transformRequest <span class="token keyword">as</span> AxiosTransformer<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>
    29. 

  29.   transformResponse<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token operator">...</span><span class="token punctuation">(</span>axios<span class="token punctuation">.</span>defaults<span class="token punctuation">.</span>transformResponse <span class="token keyword">as</span> AxiosTransformer<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span>data<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    30. 

  30.     <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">typeof</span> data <span class="token operator">===</span> <span class="token string">'object'</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    31. 

  31.       data<span class="token punctuation">.</span>b <span class="token operator">=</span> <span class="token number">2</span>
    32. 

  32.     <span class="token punctuation">}</span>
    33. 

  33.     <span class="token keyword">return</span> data
    34. 

  34.   <span class="token punctuation">}</span><span class="token punctuation">]</span>
    35. 

  35. <span class="token punctuation">}</span><span class="token punctuation">)</span>
    36. 

  36. 

  37. <span class="token function">instance</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    38. 

  38.   url<span class="token operator">:</span> <span class="token string">'/config/post'</span><span class="token punctuation">,</span>
    39. 

  39.   method<span class="token operator">:</span> <span class="token string">'post'</span><span class="token punctuation">,</span>
    40. 

  40.   data<span class="token operator">:</span> <span class="token punctuation">{</span>
    41. 

  41.     a<span class="token operator">:</span> <span class="token number">1</span>
    42. 

  42.   <span class="token punctuation">}</span>
    43. 

  43. <span class="token punctuation">}</span><span class="token punctuation">)</span>
    44. 

  44. </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></div></div><h2 id="静态方法扩展"><a href="#静态方法扩展" class="header-anchor">#</a> 静态方法扩展</h2> <p>由于 <code>axios</code> 扩展了一个静态接口，因此我们先来修改接口类型定义。</p> <p><code>types/index.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">interface</span> <span class="token class-name">AxiosStatic</span> <span class="token keyword">extends</span> <span class="token class-name">AxiosInstance</span><span class="token punctuation">{</span>
    45. 

  45.   <span class="token function">create</span><span class="token punctuation">(</span>config<span class="token operator">?</span><span class="token operator">:</span> AxiosRequestConfig<span class="token punctuation">)</span><span class="token operator">:</span> AxiosInstance
    46. 

  46. <span class="token punctuation">}</span>
    47. 

  47. </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></div></div><p><code>create</code> 函数可以接受一个 <code>AxiosRequestConfig</code> 类型的配置，作为默认配置的扩展，也可以接受不传参数。</p> <p>接着我们来实现 <code>axios.create</code> 静态方法。</p> <p><code>axios.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">createInstance</span><span class="token punctuation">(</span>config<span class="token operator">:</span> AxiosRequestConfig<span class="token punctuation">)</span><span class="token operator">:</span> AxiosStatic <span class="token punctuation">{</span>
    48. 

  48.   <span class="token keyword">const</span> context <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Axios</span><span class="token punctuation">(</span>config<span class="token punctuation">)</span>
    49. 

  49.   <span class="token keyword">const</span> instance <span class="token operator">=</span> Axios<span class="token punctuation">.</span>prototype<span class="token punctuation">.</span><span class="token function">request</span><span class="token punctuation">.</span><span class="token function">bind</span><span class="token punctuation">(</span>context<span class="token punctuation">)</span>
    50. 

  50. 

  51.   <span class="token function">extend</span><span class="token punctuation">(</span>instance<span class="token punctuation">,</span> context<span class="token punctuation">)</span>
    52. 

  52. 

  53.   <span class="token keyword">return</span> instance <span class="token keyword">as</span> AxiosStatic
    54. 

  54. <span class="token punctuation">}</span>
    55. 

  55. axios<span class="token punctuation">.</span><span class="token function-variable function">create</span> <span class="token operator">=</span> <span class="token keyword">function</span> <span class="token function">create</span><span class="token punctuation">(</span>config<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    56. 

  56.   <span class="token keyword">return</span> <span class="token function">createInstance</span><span class="token punctuation">(</span><span class="token function">mergeConfig</span><span class="token punctuation">(</span>defaults<span class="token punctuation">,</span> config<span class="token punctuation">)</span><span class="token punctuation">)</span>
    57. 

  57. <span class="token punctuation">}</span>
    58. 

  58. </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></div></div><p>内部调用了 <code>createInstance</code> 函数，并且把参数 <code>config</code> 与 <code>defaults</code> 合并，作为新的默认配置。注意这里我们需要 <code>createInstance</code> 函数的返回值类型为 <code>AxiosStatic</code>。</p> <h2 id="demo-编写"><a href="#demo-编写" class="header-anchor">#</a> demo 编写</h2> <div class="language-typescript line-numbers-mode"><pre class="language-typescript"><code><span class="token keyword">const</span> instance <span class="token operator">=</span> axios<span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    59. 

  59.   transformRequest<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token punctuation">(</span><span class="token keyword">function</span><span class="token punctuation">(</span>data<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    60. 

  60.     <span class="token keyword">return</span> qs<span class="token punctuation">.</span><span class="token function">stringify</span><span class="token punctuation">(</span>data<span class="token punctuation">)</span>
    61. 

  61.   <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token operator">...</span><span class="token punctuation">(</span>axios<span class="token punctuation">.</span>defaults<span class="token punctuation">.</span>transformRequest <span class="token keyword">as</span> AxiosTransformer<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>
    62. 

  62.   transformResponse<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token operator">...</span><span class="token punctuation">(</span>axios<span class="token punctuation">.</span>defaults<span class="token punctuation">.</span>transformResponse <span class="token keyword">as</span> AxiosTransformer<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span>data<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    63. 

  63.     <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">typeof</span> data <span class="token operator">===</span> <span class="token string">'object'</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    64. 

  64.       data<span class="token punctuation">.</span>b <span class="token operator">=</span> <span class="token number">2</span>
    65. 

  65.     <span class="token punctuation">}</span>
    66. 

  66.     <span class="token keyword">return</span> data
    67. 

  67.   <span class="token punctuation">}</span><span class="token punctuation">]</span>
    68. 

  68. <span class="token punctuation">}</span><span class="token punctuation">)</span>
    69. 

  69. 

  70. <span class="token function">instance</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    71. 

  71.   url<span class="token operator">:</span> <span class="token string">'/config/post'</span><span class="token punctuation">,</span>
    72. 

  72.   method<span class="token operator">:</span> <span class="token string">'post'</span><span class="token punctuation">,</span>
    73. 

  73.   data<span class="token operator">:</span> <span class="token punctuation">{</span>
    74. 

  74.     a<span class="token operator">:</span> <span class="token number">1</span>
    75. 

  75.   <span class="token punctuation">}</span>
    76. 

  76. <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">=&gt;</span> <span class="token punctuation">{</span>
    77. 

  77.   <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>data<span class="token punctuation">)</span>
    78. 

  78. <span class="token punctuation">}</span><span class="token punctuation">)</span>
    79. 

  79. </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></div></div><p>我们对上节课的示例做了小小的修改，通过 <code>axios.create</code> 方法创建一个新的实例 <code>instance</code>，并传入了 <code>transformRequest</code> 和 <code>transformResponse</code> 的配置修改了默认配置，然后通过 <code>instance</code> 发送请求，效果和之前是一样的。</p> <p>至此我们实现了 <code>axios.create</code> 静态接口的扩展，整个 <code>ts-axios</code> 的配置化也告一段落。官方 axios 库还支持了对请求取消的能力，在发送请求前以及请求发送出去未响应前都可以取消该请求。下一章我们就来实现这个 feature。</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》/08.ts-axios 配置化实现/03.扩展 create 静态接口.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/f5b627bfebba87fc/" class="page-nav-centre page-nav-centre-prev"><div class="tooltip">请求和响应配置化</div></a> <a href="/blog/pages/fdc6da5372397430/" class="page-nav-centre page-nav-centre-next"><div class="tooltip">取消功能的设计与实现</div></a></div> <div class="page-nav"><p class="inner"><span class="prev">
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