README

Proxy Checker is a PHP library that allows you to quickly check a list of proxies.

• fast (thanks to asynchronous requests)
• simple (PSR-7 based)
• supports many protocols
• customizable (full control over request / response checking)

Installation

composer require retrowaver/proxy-checker

How it works?

ProxyChecker constructor takes 2 mandatory arguments:

• PSR-7 Request
• object that implements ResponseCheckerInterface

When checkProxies() is called, it attempts to send that request using every proxy, and then calls checkResponse() of provided ResponseCheckerInterface implementation, which ultimately decides whether proxy is valid or not.

Depending on how much control you want, you can use built-in ResponseCheckerBuilder for a quick start (see below) or make a custom class.

1. Basic usage

Step 1. Make proxy array

Make proxy array manually:

use Retrowaver\ProxyChecker\Entity\Proxy;

$proxies = [
    (new Proxy)
        ->setIp('127.0.0.1')
        ->setPort(1080)
        ->setProtocol('http'),
    (new Proxy)
        ->setIp('192.168.1.1')
        ->setPort(8080)
        ->setProtocol('http')
];

... or use built-in simple importer:

use Retrowaver\ProxyChecker\Import\SimpleImporter;

$importer = new SimpleImporter;

$lines = file('path-to-file-with-proxies.txt'); // ip:port format
$proxies = $importer->import($lines, 'http');

Step 2. Prepare a request

Prepare a PSR-7 request that will be send using proxies.

use GuzzleHttp\Psr7\Request;

$request = new Request('GET', 'http://example.com');

Step 3. Prepare ResponseChecker

You can use built-in ResponseCheckerBuilder:

use Retrowaver\ProxyChecker\ResponseChecker\ResponseCheckerBuilder;

$responseChecker = (new ResponseCheckerBuilder)
    ->bodyContains('some string on target website')
;

or write a custom ResponseCheckerInterface implementation:

use Psr\Http\Message\ResponseInterface;
use Retrowaver\ProxyChecker\Entity\ProxyInterface;

class CustomResponseChecker implements ResponseCheckerInterface
{
    public function checkResponse(
        ResponseInterface $response,
        ProxyInterface $proxy
    ): bool {
        if (...) {
            // proxy not valid
            return false;
        }

        // valid proxy
        return true;
    }
}

$responseChecker = new CustomResponseChecker;

Step 4. Create ProxyChecker and check proxies

use Retrowaver\ProxyChecker\ProxyChecker;

$proxyChecker = new ProxyChecker($request, $responseChecker);

$validProxies = $proxyChecker->checkProxies($proxies);

2. Additional info

Options reference

ProxyChecker accepts optional parameters $options and $requestOptions:

• $options
  • concurrency - max concurrent request (default 50)
• $requestOptions are Guzzle request options that are passed to Guzzle client while sending a request. Currently there's only one default value: 'timeout' => 20

Supported protocols

PHP Proxy Checker should work with http, https, socks4, socks4a, socks5 and socks5h proxies (see https://curl.haxx.se/libcurl/c/CURLOPT_PROXY.html for descriptions).