request.js

import fetch from 'dva/fetch';
import config from '../config';
import { Toast } from 'antd-mobile';
import { getAccessToken } from './authority';

const codeMessage = {
  200: '数据获取成功',
  201: '操作成功',
  202: '已加入任务队列',
  204: '删除成功',
  400: '操作失败',
  401: '授权失败',
  403: '拒绝访问',
  404: '页面不存在',
  422: '数据验证失败',
  500: '服务发生异常',
  502: '服务当前不可用, 请稍后再试',
  503: '服务器开小差了, 请稍后再试',
  504: '服务访问超时, 请稍后再试',
};

const checkStatus = response => {
  if (response.status >= 200 && response.status < 300) {
    return response;
  }
  const errortext = codeMessage[response.status] || response.statusText;
  const error = new Error(errortext);
  error.name = response.status;
  error.response = response;
  error.errortext = errortext;
  throw error;
};

/**
 * Requests a URL, returning a promise.
 *
 * @param  {string} url       The URL we want to request
 * @param  {object} [option] The options we want to pass to "fetch"
 * @return {object}           An object containing either "data" or "err"
 */
export function request(url, option) {
  const options = {
    ...option,
  };
  /**
   * Produce fingerprints based on url and parameters
   * Maybe url has the same parameters
   */

  const defaultOptions = {
    credentials: 'include',
    headers: {
      Accept: 'application/json',
      'Content-Type': 'application/json; charset=utf-8',
      Authorization: `${config.authPrefix} ${getAccessToken()}`,
    }
  };

  const newOptions = { ...defaultOptions, ...options };

  if (
    newOptions.method === 'POST' ||
    newOptions.method === 'PUT' ||
    newOptions.method === 'DELETE'
  ) {
    newOptions.body = JSON.stringify(newOptions.body);
  }


  return fetch(config.baseUrl + url, newOptions)
    .then(checkStatus)
    .then(response => {
      if (newOptions.method === 'DELETE' || response.status === 204) {
        return response.text();
      }
      return response.json().then(data => data);
    }).catch(e => {
      const status = e.name;

      Toast.fail(`请求错误 ${status}: ${e.errortext}`, 2, () => {
        if (status === 401) {
          // @HACK
          /* eslint-disable no-underscore-dangle */
          window.location.href = '/go_mobile';
          return;
        }
        // environment should not be used
        if (status === 403) {
          return;
        }
        if (status <= 504 && status >= 500) {
          return
        };
        if (status >= 404 && status < 422) {
          return;
        }
      })
    });
}