This module provides a simple API for using HTTP proxies in a NodeJS application.

For example, when you make many HTTP requests (specially in the SEO world ;-)), you need to make them through a group of proxies. The goal of this package is to simplify your code for managing a list of proxies : load proxies, get ramdomly one proxy, check proxies, ...

Install

npm install simple-proxies

##Structure of the txt proxy file

Each line of the file should respect the one of following structure :

• host:port:username:password
• host:port
• comment with #
• blank line

Using proxies in your own app

There are 2 components :

• ProxyFileLoader : load proxies from a txt file & store them into a JS object.
• ProxyChecker : check if proxies are valid & not banned by Google.

An example with Axios

import * as proxyLoader from '../lib/proxyfileloader.js'
import axios from 'axios'

// Change the config if you want to use a specific txt file
// This is not necessary if you plan to use proxies.txt on the current folder
const config = proxyLoader.config().setProxyFile('yourfile.txt')
const proxyList = await proxyLoader.loadProxyFile(config)

// Make a request with one proxy
const response = await axios({ uri: 'http://www.xxx.com', proxy: proxyList.getProxy().getConnectionParams() })

API

Load the default proxy file

import * as proxyLoader from 'simple-proxies/lib/proxyfileloader'
const proxyList = await proxyLoader.loadDefaultProxies();
const proxies = proxyList.getProxies();

By default, the list of proxies are in a file called proxies.txt and it should be in the root folder of your project.

Read proxies from a specific txt file

import * as proxyLoader from 'simple-proxies/lib/proxyfileloader'
var config = proxies
  .config()
  .setProxyFile('filename.txt')
  .setCheckProxies(false);

const proxyList = await proxyLoader.loadProxyFile(config)

The config can be used to personalize how the proxies have to be managed. See FileConfig in model.js to get all options.

The object model

After loading the proxies from a file or from a db, you receive a ProxyList object which contains an array of Proxy objects.

Get all Proxies

var proxies = proxyList.getProxies()
proxies.map(proxy => console.log(proxy)) // return an array of proxies : {host, port, valid, userName, password}

Get one proxy

var proxy = proxyList.getProxy()

console.log(proxy.getUrl()) //return the complete URL of the proxy : http://username:pwd@host:port
console.log(proxy.userName)
console.log(proxy.password)
console.log(proxy.host)
console.log(proxy.port)
console.log(proxy.valid)

This method loops on the proxy list on each call.

Get one proxy randomly

var proxy = proxyList.pick()

console.log(proxy.getUrl()) //return the complete URL of the proxy : http://username:pwd@host:port
console.log(proxy.userName)
console.log(proxy.password)
console.log(proxy.host)
console.log(proxy.port)
console.log(proxy.valid)

See the model.js to get a complete overview of the API provided by this model.

Check the proxies

Anywhere in your code or in a cron, you can check if the proxies are still valid by using the proxy checker. This component uses a ProxyList to make the check.

import * as checher from 'simple-proxies/lib/proxychecker'
import * as proxyLoader from 'simple-proxies/lib/proxyfileloader'

const proxyList =  await proxyLoader.loadDefaultProxies();
var config = checker.config().setGoogleAdress('http://www.google.be');
await checker.checkAllProxies(proxyList, config, function(error) {
//the proxies in proxyList should be updated (valid or not valid)

The config can be used to personalize how the proxies has to be checked. See CheckConfig in model.js to get all options.