JSProxyPool

JSProxyPool is a lightweight and simple NodeJS library that handles the management of a pool of proxies.

• It handles the db access on its own, fully transparent to the client.
• Fully compatible to changes and tweaks to match any pool using application.

Features

• Fully compatible with various databases. [will be explained later]
• Simple to use and ultra reliable
• set a resting interval for a proxy to prevent overuse of a single proxy.

DB compatibility

DataAccess folder contains classes for every database. for now only MongoDB is implemented, but feel free to create your own implementation for other databases.

To implement a new database access all you need to do is implement the following functions and it will work like a charm:

getProxy

/* Gets a proxy from the database */
getProxy (options, callback);

Gets a proxy from the database

options:

maxLastUsedTime (timestamp): Returns only proxies that were used before param value. active (boolean): Whether to return active proxies or inactive proxies

The method calls the callback function with error as first parameter and the proxy object as second.

getProxies

/* Gets a list of proxies from the database */
getProxies (maxLastUsedTime, count, callback);

Gets a list of proxies from the database.

options:

count (number): The amount of proxies to get. maxLastUsedTime (timestamp): Returns only proxies that were used before param value. active (boolean): Whether to return active proxies or inactive proxies soryby (object): As documented here

The method calls the callback function with error as first parameter and the proxies array object as second.

addProxy

/* Adds a new proxy to the database */
addProxy (proxy, callback);

Adds a new proxy to the database. The method calls the callback function with error as first parameter and the proxy object that was just added as second.

updateProxy

/* Updates the given proxy with given args. */
updateProxy (proxy, newProps, callback);

Updates the given proxy with given args. Proxy must contain _address (string) & _port (number) properties in order to identify the proxy in the db. newProps (object) will contain the properties to update and their new value (ex: { _active:true }) The method calls the callback function with error as first parameter and the proxy object that was just updated as second.

isProxyExists

/* Adds a new proxy to the database */
isProxyExists (proxy, callback);

Checks if the proxy exists in the db. The method calls the callback function with error as first parameter and the proxy object from the db, if exists.

Installation

To add the library to your project just run the npm command:

$ npm install proxy-pool

Proxy Pool Usage

First require the proxy-pool library:

var jsProxyPool = require("proxy-pool");

The ProxyPool constructor gets a ProxyPoolConfiguration instance as parameter. ProxyPoolConfiguration contains all the configurations and constants the pool needs to operate.

To create a configuration instance you should first create a data access instance that is used to access the desired db. The configuration instance constructor gets the data access instance and a number that represents the number of seconds the proxy should rest after it made a request (this is used to not overuse a single proxy).

var mongoDbDataAccess = new jsProxyPool.MongoAccess("myMongoDbConnectionString", "myProxiesCollectionName");
var poolConfig = new jsProxyPool.ProxyPoolConfiguration(mongoDbDataAccess, 20*1000 /* Rest time in milliseconds */);
var pool = new jsProxyPool.ProxyPool(poolConfig);

addProxy

Adds a new 'Proxy' object to the pool

First create a proxy object to add:

var proxy = new jsProxyPool.Proxy('[address]', '[port]');

Then call addProxy:

pool.addProxy (proxy,function (error, proxy){
    if (error){
        /* Code to be executed on error */
        return;
    }
    /* Code to be executed after proxy was added */
});

getProxy

Gets a new 'Proxy' that is ready to use

pool.getProxy({},function (error, proxy){
    if (error){
        /* Code to be executed on error */
        return;
    }
    /* Code to be executed when we got a proxy from the pool */
});

This method automatically calls updateProxy to update _lastUsedTime set that this proxy was just used to make a request.

getProxies

Gets an array of Proxies that are ready to use.

pool.getProxies({},function (error, proxies){
    if (error){
        /* Code to be executed on error */
        return;
    }
    /* Code to be executed when we got an array of proxies from the pool */
});

reportProxyActivity [DEPRECATED]

Updates the proxy active state according to the active parameter. Call this function if the proxy is not working any more.

pool.reportProxyActivity(proxy,active);

Helpers

If you don't have any proxies to fill the pool with, it is recommended to refer Refill-Proxy-Pool library in order to fill the pool with free proxies.

Simple NodeJS code that uses HMA-Proxy-Scraper and Xroxy-Proxy-Scraper to scrape free proxies and insert them to the JSProxyPool db.

License

MIT

Feel free to fork and contribute :)