hiproxy/src/helpers/createPacFile.js

hiproxy - lightweight and powerful proxy tool for front-end developer based on Node.js.

/**
 * @file 创建自动代理配置文件
 * @author zdying
 */

'use strict';

var fs = require('fs');
var path = require('path');
var dirtool = require('../helpers/dirTool');

module.exports = function createPacFile (proxyPort, localIP, domains, pacFilePath) {
  // if (!domains || Object.keys(domains).length === 0) {
  //   return Promise.reject(new Error('domain list is empty, can not create `proxy.pac` file.'));
  // }

  /** ** 这个方法是生成到proxy.pac中的，hiproxy不会调用 ****/
  /* eslint-disable */
  /* istanbul ignore next */
  function FindProxyForURL (url, host) {
    host = host.toLowerCase();

    // alert('host ::: ' + host);
    // alert('host in DOMAINS ::: ' + host in DOMAINS);

    if (host in DOMAINS) {
      // alert('return PROXY: ' + PROXY);
      return PROXY;
    }

    if (!host.match(EXCLUDE_REG) && SYS_PROXY) {
      // alert('return SYS_PROXY: ' + SYS_PROXY);
      return SYS_PROXY;
    } else {
      // alert('return DIRECT :::' + DIRECT);
      return DIRECT;
    }
  }
  /* eslint-enable */

  // 系统代理地址，如果设置了系统代理，不在hiipack代理范围内的，走这个代理
  var sysProxy = global.args ? global.args.sysProxy : ''; // config.get('system_proxy');
  // 不需要代理的域名
  var proxyExclude = ''; // config.get('proxy_exclude');

  if (!proxyExclude) {
    proxyExclude = 'localhost,::1,127.0.0.1';
  }

  // 处理proxyExclude中的特殊字符和通配符
  var regText = proxyExclude
    .replace(/\s*,\s*/g, '|')
    .replace(/\./g, '\\.')
    .replace(/\*/g, '.*');

  var txt = [
    'var SYS_PROXY = "' + (sysProxy ? 'PROXY ' + sysProxy : '') + '";\n',
    'var PROXY = "PROXY ' + localIP + ':' + proxyPort + '";\n',
    'var DIRECT = "DIRECT";\n',
    'var EXCLUDE_REG = /' + regText + '/;\n',
    'var DOMAINS = ' + JSON.stringify(domains, null, 4) + ';\n\n',

    FindProxyForURL.toString().replace(/^\s{8}/mg, '')
  ];

  pacFilePath = pacFilePath || path.resolve(dirtool.getHiproxyDir(), 'proxy.pac');

  return new Promise(function (resolve, reject) {
    fs.writeFile(pacFilePath, txt.join('\n'), function (err) {
      if (err) {
        log.error(err);
        reject(err);
      } else {
        log.debug('Proxy pac file create success: ', pacFilePath);
        resolve(pacFilePath);
      }
    });
  });
};