rn-web-cli/tmpl/project/server/express/react/fetch/wrap-fetch.js

React Native for Web

/**
 * 名称：fetch包裹工具
 * 日期：2016-11-09
 * 描述：包裹fetch 设置baseUrl
 */

module.exports = (fetch, proxy) => {
  if (typeof global === 'undefined') {
    window.global = window
  }
  const myfetch = (url, config) => {
    let isRelative = !/^(http:|https:)/.test(url.trim());
    url = isRelative ? url : (global.fetch.baseUri || '') + url
    if (proxy && !isRelative) {
      config = config || {}
      config.headers = config.headers || {}
      config.headers.___originUrl__ = url
      return fetch('/fetch', config)
    } else {
      return fetch(url, config)
    }
  }
  global.fetch = myfetch
  global.Response = myfetch.Response = fetch.Response
  global.Headers = myfetch.Headers = fetch.Headers
  global.Request = myfetch.Request = fetch.Request
  return global.fetch
}