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chore(doc): 中文文档文件上传补充说明 #256

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Sep 14, 2021
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chore(doc): 中文文档文件上传补充说明 #256

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4 changes: 2 additions & 2 deletions README_zh-CN.md
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Expand Up @@ -818,12 +818,12 @@ request('/api/v1/some/api', { getResponse: true }).then(({ data, response }) =>

### 文件上传

使用 FormData() 构造函数时，浏览器会自动识别并添加请求头 `"Content-Type: multipart/form-data"`, 且参数依旧是表单提交时那种键值对，因此不需要开发者手动设置 **Content-Type**
使用 FormData() 构造函数时，需要制定`requestType: "form"`，然后浏览器会自动识别并添加请求头 `"Content-Type: multipart/form-data"`，且参数依旧是表单提交时那种键值对，因此不需要开发者手动设置请求头 **Content-Type**，否则可能接口会报 500 的错误。

```javascript
const formData = new FormData();
formData.append('file', file);
request('/api/v1/some/api', { method: 'post', data: formData });
request('/api/v1/some/api', { method: 'post', requestType: "form", data: formData });
```

如果希望获取自定义头部信息，需要在服务器设置 [Access-Control-Expose-Headers](https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Headers/Access-Control-Expose-Headers),然后可按照上述方式获取自定义头部信息。
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