power_sensor/jscore/utils/request.js

import SyncStorage from 'sync-storage';
import {Alert} from 'react-native';

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。',
};

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;
  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 default function request(url, option) {
  const options = {
    //expirys: true,
    ...option,
  };

  const defaultOptions = {
    //credentials: 'include',
    headers: {},
  };
  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 = JSON.stringify(newOptions.body);
    } else {
      // newOptions.body is FormData
      newOptions.headers = {
        Accept: 'application/json',
        ...newOptions.headers,
      };
    }
  }

  const baseURL = SyncStorage.get('baseURL');
  url = baseURL + url;
  console.log(url)

  let credential = SyncStorage.get('credential');
  if(credential) {
    newOptions.headers = {
      ...newOptions.headers,
      Authorization:`JWT ${credential.token}`,
    };
  };

  return fetch(url, newOptions)
    .then(checkStatus)
    //.then(response => cachedSave(response, hashcode))
    .then(response => {
      // DELETE and 204 do not return data by default
      // using .json will report an error.
      if (newOptions.method === 'DELETE' || response.status === 204) {
        return response.text();
      }
      const resp = response.json();
      if (resp.code === 1001){
        //  resp.code是未定义，不会执行此处
        this.props.dispatch(NavigationActions.navigate({ routeName: 'Login' }));
        return;
      }
      return resp;
    })
    .catch(e => {
      const status = e.name;
      if (status == 'TypeError' || status == 400) {
        Alert.alert('无效的服务器地址，请重新登录！');
      }
      if (status == 404) {
        Alert.alert('请求的操作不存在！');
      }
      if (status == 500) {
        Alert.alert('远程错误！');
      }
    });
}