Ossianaa / node-libcurl

node-libcurl is a request library that mimics chrome ja3 fingerprints

node-libcurl

Different with Nodejs fetch api

• The fingerprint can be customized to look like chrome or firefox ,it modified the BoringSSL extension, set the custom cipher suite with Libcurl

---

Attention by custom ja3 fingerprint!!!

• ssl support for node-libcurl is provided by boringssl
• boringssl does not provided the following support
• 1. extension support group only support [P-256, P-384, P-521, X25519], but the library was modified to provide dummy support groups, like [ffdhe2048, ffdhe3072] (ja3 is 256,257). if you use them, it may cause an SSL connection error. This depends on whether the server selects these two support groups
• 2. ec_point_format (ja3 is ...,0-1-2) only support 0 (uncompressed)
• 3. extensions only support (ja3)[0, 65037, 23, 65281, 10, 11, 35, 16, 5, 13, 13172, 18, 30032, 14, 51, 45, 42, 43, 44, 57, 65445, 27, 34, 17513, 28, 41]

---

Build Status

Platform	Support
Windows (x64)	Yes
Windows (x86)	No
Windows (arm)	No
Ubuntu (x86_64)	Yes
MacOS (x86_64)	Yes
MacOS (arm64)	No

---

How to build

npm i -g @ossiana/node-libcurl

---

Use Sample

import

import { LibCurl, fetch, requests } from '@ossiana/node-libcurl'

browser fetch style

fetch("https://xxx.io/api/graphql/").then(e => e.json())

requests style

const session = requests.session();

session.setCookie('ua', '123=/1a', '.baidu.com', '/');

const res = await session.get('https://www.baidu.com', {
    headers: {
        "user-Agent": "1"
    }
});
console.log(res.headersMap);
console.log(session.getCookiesMap().get('ua'));
console.log(res.text);

winhttp style

const curl = new LibCurl();
curl.open('POST', 'https://xxx.io/api/graphql/');
curl.setRequestHeaders(`Host: xxx.io
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Content-Type: application/octet-stream
Referer: https://xxx.io/
Accept-Encoding: gzip, deflate, br
Accept-Language: zh-CN,zh;q=0.9
`);
curl.send(new Uint8Array([1, 255, 188]))
    .then(e => {
        console.log(curl.getResponseString());
    });