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请求配置

{
  // `url` 是用于请求的服务器URL
  url: '/user',

  // `method` 是在发出请求时使用的请求方法
  method: 'get', // default

  // `baseURL` 将会作为 `url`的前缀 ，除非 `url` 是绝对路径
  // 设置baseURL以传递相对url是很方便的。
  // 对当前实例有效
  baseURL: 'https://some-domain.com/api/',

  // `transformRequest` allows changes to the request data before it is sent to the server
  // This is only applicable for request methods 'PUT', 'POST', and 'PATCH'
  // The last function in the array must return a string or an ArrayBuffer
  transformRequest: [function (data) {
    // Do whatever you want to transform the data

    return data;
  }],

  // `transformResponse` allows changes to the response data to be made before
  // it is passed to then/catch
  transformResponse: [function (data) {
    // Do whatever you want to transform the data

    return data;
  }],

  // `headers` are custom headers to be sent
  headers: {'X-Requested-With': 'XMLHttpRequest'},

  // `params` 是要用请求发送的URL参数 如url?id=12345
  params: {
    ID: 12345
  },

  // `paramsSerializer` is an optional function in charge of serializing `params`
  // (e.g. https://www.npmjs.com/package/qs, http://api.jquery.com/jquery.param/)
  paramsSerializer: function(params) {
    return Qs.stringify(params, {arrayFormat: 'brackets'})
  },

  // `data` 是作为请求主体发送的数据，也就真正想要上传的数据
  // 只适用于请求方法 'PUT', 'POST', 和 'PATCH'
  // 当没有 `transformRequest` 被设置时, 必须是一个字符串，数组缓冲区或者哈希
  data: {
    firstName: 'Fred'
  },

  // `timeout` specifies the number of milliseconds before the request times out.
  // If the request takes longer than `timeout`, the request will be aborted.
  timeout: 1000,

  // `withCredentials` indicates whether or not cross-site Access-Control requests
  // should be made using credentials
  withCredentials: false, // default

  // `adapter` allows custom handling of requests which makes testing easier.
  // Call `resolve` or `reject` and supply a valid response (see [response docs](#response-api)).
  adapter: function (resolve, reject, config) {
    /* ... */
  },

  // `auth` indicates that HTTP Basic auth should be used, and supplies credentials.
  // This will set an `Authorization` header, overwriting any existing
  // `Authorization` custom headers you have set using `headers`.
  auth: {
    username: 'janedoe',
    password: 's00pers3cret'
  }

  // `responseType` indicates the type of data that the server will respond with
  // options are 'arraybuffer', 'blob', 'document', 'json', 'text'
  responseType: 'json', // default

  // `xsrfCookieName` is the name of the cookie to use as a value for xsrf token
  xsrfCookieName: 'XSRF-TOKEN', // default

  // `xsrfHeaderName` is the name of the http header that carries the xsrf token value
  xsrfHeaderName: 'X-XSRF-TOKEN', // default

  // `progress` allows handling of progress events for 'POST' and 'PUT uploads'
  // as well as 'GET' downloads
  progress: function(progressEvent) {
    // Do whatever you want with the native progress event
  }
}

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