// {app_root}/config/plugin.js
exports.httpProxy = {
  enable: true,
  package: '@eggjs/http-proxy',
};

/**
 * @param {String} host - target host.
 * @param {Object} [options] - options for request, see https://github.com/node-modules/urllib
 * @param {Boolean} [options.withCredentials] - if true, will send cookie when cors
 * @param {Function} [options.rewrite] - rewrite target url obj
 */
await ctx.proxyRequest(host, options);

// current url: http://eggjs.org/api/user -> http://github.com/api/user
await ctx.proxyRequest('github.com');

// current url: http://eggjs.org/api/user -> http://github.com/egg/eggjs/api/user
await ctx.proxyRequest('github.com', {
  rewrite(urlObj) {
    urlObj.pathname = '/egg/eggjs/api/user';
    return urlObj;
  },
});

await ctx.proxyRequest('github.com', {

  streaming: false,

  async beforeResponse(proxyResult) {
    proxyResult.headers.addition = 'true';
    // streaming=false should modify `data`, otherwise use stream to handler proxyResult.res yourself
    proxyResult.data = proxyResult.data.replace('github.com', 'www.github.com');
    return proxyResult;
  },
});

// {app_root}/config/config.default.js
exports.httpProxy = {

};