Hotax/src/utils/request.js

import fetch from 'dva/fetch';
import { message } from 'antd';
import { routerRedux } from 'dva/router';
import store from '../index';

const codeMessage = {
  200: '服务器成功返回请求的数据。',
  201: '新建或修改数据成功。',
  202: '一个请求已经进入后台排队（异步任务）。',
  204: '删除数据成功。',
  400: '发出的请求有错误，服务器没有进行新建或修改数据的操作。',
  401: '用户没有权限（令牌、用户名、密码错误）。',
  403: '用户得到授权，但是访问是被禁止的。',
  404: '发出的请求针对的是不存在的记录，服务器没有进行操作。',
  406: '请求的格式不可得。',
  410: '请求的资源被永久删除，且不会再得到的。',
  422: '当创建一个对象时，发生一个验证错误。',
  500: '服务器发生错误，请检查服务器。',
  502: '网关错误。',
  503: '服务不可用，服务器暂时过载或维护。',
  504: '网关超时。',
};
function checkHttpStatus(response) {
  if (response.status >= 200 && response.status < 300) {
    return response;
  }
  const errortext = codeMessage[response.status] || response.statusText;
  message.error(`请求错误 ${response.url}: ${errortext}`);
  const error = new Error(errortext);
  error.name = response.status;
  error.response = response;
  throw error;
}
function checkContentStatus(data) {
  if (!data.success) {
    const errortext = codeMessage[data.code] || data.message;
    if (data.code < 10002 || data.code >= 10005) {
      message.error(errortext);
    }
    const error = new Error(errortext);
    error.name = data.code;
    error.response = data;
    throw error;
  }
  return data;
}

/**
 * Requests a URL, returning a promise.
 *
 * @param  {string} url       The URL we want to request
 * @param  {object} [options] The options we want to pass to "fetch"
 * @return {object}           An object containing either "data" or "err"
 */

export default function request(url, options) {
  const defaultOptions = {
    credentials: 'include',
  };
  const newOptions = { ...defaultOptions, ...options };
  if (newOptions.method === 'POST' || newOptions.method === 'PUT' || newOptions.method === 'DELETE') {
    if (!(newOptions.body instanceof FormData)) {
      newOptions.headers = {
        Accept: 'application/json',
        'Content-Type': 'application/json; charset=utf-8',
        ...newOptions.headers,
      };
      // newOptions.body is Object
      if (newOptions.body instanceof Object) {
        newOptions.body = JSON.stringify(newOptions.body);
      }
    } else {
      newOptions.headers = {
        Accept: 'application/json',
        'Content-Type': 'multipart/form-data',
        ...newOptions.headers,
      };
    }
  }
  return fetch(url, newOptions)
    .then(checkHttpStatus)
    .then((response) => {
      if (response.status === 204) {
        return response.text();
      }
      return response.json();
    })
    .then(checkContentStatus)
    .catch((e) => {
      const { dispatch } = store;
      const status = e.name;
      if (status === 401) {
        dispatch({
          type: 'login/logout',
        });
      }
      if (status === 403) {
        dispatch(routerRedux.push('/exception/403'));
      }
      if (status <= 504 && status >= 500) {
        dispatch(routerRedux.push('/exception/500'));
      }
      if (status >= 404 && status < 422) {
        dispatch(routerRedux.push('/exception/404'));
      }
      if (status >= 10002 && status < 10005) {
        dispatch(routerRedux.push('/user/login'));
      }
      return e.response;
    });
}