free-proxy_checker

NodeJS library WITHOUT any external dependencies to:
- download free proxies;
- check if free HTTP/SOCKS4/SOCKS5 proxies are working/up.

Proxy testing protocol

$3

To test HTTP proxies, the library makes an HTTP CONNECT request to the proxy host/IP and port.
If the request doesn't generate an error/timeout and if the status code is 200, we consider the proxy is UP.
We do that to ignore proxies that are up but that ignore/block our request.

$3

To test SOCKS proxies, we establish create a TCP socket using net.Socket and try to establish a connection with the proxy.
If the connection is successful (no error and no timeout), we consider the proxy is UP.

Library installation

``
npm install free-proxy-checker
`

Library usage

You can find examples in the /examples directory.

Downloading and testing free proxies

`javascript
const {ProxyChecker, ProxyScrapeDownloader, FoxtoolsDownloader, FreeProxyListDownloader, downloadAllProxies} = require('free-proxy-checker');

(async () => {
// We can download proxies from a particular proxy provider, e.g. proxyscrape, foxtools, freeproxylist and my proxy
const proxyScrapeDownloader = new ProxyScrapeDownloader();
const proxyScrapeProxies = await proxyScrapeDownloader.download();

const foxtoolsDownloader = new FoxtoolsDownloader();
const foxtoolsProxies = await foxtoolsDownloader.download();

// We can also download all proxies from all proxy providers at once
const allProxies = await downloadAllProxies();

// Then, we can check the availability of the proxies we downloaded
// The verbose: true option enables you to see the testing progress and have a time estimate
const proxyChecker = new ProxyChecker(allProxies, {
concurrency: 25,
timeout: 7500,
verbose: true
})

await proxyChecker.checkProxies();
const proxiesUp = proxyChecker.getProxiesUp();
console.log(There are ${proxiesUp.length} proxies UP:);
console.log(proxiesUp);
})();
`

Testing if proxies are UP/DOWN


The code snippet below shows how you can create HttpProxy and SocksProxy to create proxy instances, and pass them to a ProxyChecker to verify their availability.

`javascript
const {HttpProxy, SocksProxy, ProxyChecker} = require('free-proxy-checker');


(async () => {
const proxies = [];
proxies.push(new HttpProxy('112.6.117.178', '8085'));
proxies.push(new SocksProxy('5.153.140.180', '4145'));


const proxyChecker = new ProxyChecker(proxies, {
concurrency: 15,
timeout: 7500,
verbose: 30
})

await proxyChecker.checkProxies();
let proxiesUp = proxyChecker.getProxiesUp();
console.log(There are ${proxiesUp.length} proxies UP:);
console.log(proxiesUp);
})();
``

Remarks

For the moment the library is really basic, it only checks if a proxy is UP/DOWN.
It doesn't store any data about latency.
Feel free to open an issue if you have a feature request.
I may add it to the library if I feel like it's relevant.

Related projects

https://niek.github.io/free-proxy-list/: A page that leverages the free-proxy-checker library to display a list of available proxies.
Results are updated every hour.