https://github.com/lexiforest/curl_cffi

Python binding for curl-impersonate fork via cffi. A http client that can impersonate browser tls/ja3/http2 fingerprints.
https://github.com/lexiforest/curl_cffi

akamai-fingerprint curl curl-impersonate fingerprinting http http-client http2-fingerprint https ja3 ja3-fingerprint tls-fingerprint web-scraping

Last synced: about 13 hours ago
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Python binding for curl-impersonate fork via cffi. A http client that can impersonate browser tls/ja3/http2 fingerprints.

Host: GitHub
URL: https://github.com/lexiforest/curl_cffi
Owner: lexiforest
License: mit
Created: 2022-03-10T02:39:23.000Z (about 3 years ago)
Default Branch: main
Last Pushed: 2025-04-07T03:51:21.000Z (16 days ago)
Last Synced: 2025-04-14T18:59:43.418Z (8 days ago)
Topics: akamai-fingerprint, curl, curl-impersonate, fingerprinting, http, http-client, http2-fingerprint, https, ja3, ja3-fingerprint, tls-fingerprint, web-scraping
Language: Python
Homepage: https://curl-cffi.readthedocs.io/
Size: 1.39 MB
Stars: 3,434
Watchers: 35
Forks: 319
Open Issues: 51
Metadata Files:
- Readme: README.md
- Funding: FUNDING.yml
- License: LICENSE

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README

        # curl_cffi

![PyPI - Downloads](https://img.shields.io/pypi/dm/curl-cffi)

![PyPI - Python Version](https://img.shields.io/pypi/pyversions/curl_cffi)

[![PyPI version](https://badge.fury.io/py/curl-cffi.svg)](https://badge.fury.io/py/curl-cffi)

[![Generic badge](https://img.shields.io/badge/Telegram%20Group-join-blue?logo=telegram)](https://t.me/+lL9n33eZp480MGM1)

[![Generic badge](https://img.shields.io/badge/Discord-join-purple?logo=blue)](https://discord.gg/kJqMHHgdn2)

[Documentation](https://curl-cffi.readthedocs.io)

Python binding for [curl-impersonate fork](https://github.com/lexiforest/curl-impersonate)

via [cffi](https://cffi.readthedocs.io/en/latest/). For commercial support, visit [impersonate.pro](https://impersonate.pro).

Unlike other pure python http clients like `httpx` or `requests`, `curl_cffi` can

impersonate browsers' TLS/JA3 and HTTP/2 fingerprints. If you are blocked by some

website for no obvious reason, you can give `curl_cffi` a try.

Python 3.9 is the minimum supported version since v0.10.

## Sponsors

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## Features

- Supports JA3/TLS and http2 fingerprints impersonation, including recent browsers and custome fingerprints.

- Much faster than requests/httpx, on par with aiohttp/pycurl, see [benchmarks](https://github.com/lexiforest/curl_cffi/tree/main/benchmark).

- Mimics requests API, no need to learn another one.

- Pre-compiled, so you don't have to compile on your machine.

- Supports `asyncio` with proxy rotation on each request.

- Supports http 2.0, which requests does not.

- Supports websocket.

||requests|aiohttp|httpx|pycurl|curl_cffi|

|---|---|---|---|---|---|

|http/2|❌|❌|✅|✅|✅|

|http/3|❌|❌|❌|☑️¹|✅²|

|sync|✅|❌|✅|✅|✅|

|async|❌|✅|✅|❌|✅|

|websocket|❌|✅|❌|❌|✅|

|fingerprints|❌|❌|❌|❌|✅|

|speed|🐇|🐇🐇|🐇|🐇🐇|🐇🐇|

Notes:

1. For pycurl, you need a http/3 enabled libcurl to make it work, while curl_cffi packages libcurl-impersonate inside Python wheels.

2. Since v0.11.0b1.

## Install

    pip install curl_cffi --upgrade

This should work on Linux, macOS and Windows out of the box.

If it does not work on you platform, you may need to compile and install `curl-impersonate`

first and set some environment variables like `LD_LIBRARY_PATH`.

To install beta releases:

    pip install curl_cffi --upgrade --pre

To install unstable version from GitHub:

    git clone https://github.com/lexiforest/curl_cffi/

    cd curl_cffi

    make preprocess

    pip install .

## Usage

`curl_cffi` comes with a low-level `curl` API and a high-level `requests`-like API.

### requests-like

v0.9:

```py

from curl_cffi import requests

r = requests.get("https://tls.browserleaks.com/json", impersonate="chrome")

```

v0.10:

```python

import curl_cffi

# Notice the impersonate parameter

r = curl_cffi.get("https://tls.browserleaks.com/json", impersonate="chrome")

print(r.json())

# output: {..., "ja3n_hash": "aa56c057ad164ec4fdcb7a5a283be9fc", ...}

# the js3n fingerprint should be the same as target browser

# To keep using the latest browser version as `curl_cffi` updates,

# simply set impersonate="chrome" without specifying a version.

# Other similar values are: "safari" and "safari_ios"

r = curl_cffi.get("https://tls.browserleaks.com/json", impersonate="chrome")

# Randomly choose a browser version based on current market share in real world

# from: https://caniuse.com/usage-table

# NOTE: this is a pro feature.

r = curl_cffi.get("https://example.com", impersonate="realworld")

# To pin a specific version, use version numbers together.

r = curl_cffi.get("https://tls.browserleaks.com/json", impersonate="chrome124")

# To impersonate other than browsers, bring your own ja3/akamai strings

# See examples directory for details.

r = curl_cffi.get("https://tls.browserleaks.com/json", ja3=..., akamai=...)

# http/socks proxies are supported

proxies = {"https": "http://localhost:3128"}

r = curl_cffi.get("https://tls.browserleaks.com/json", impersonate="chrome", proxies=proxies)

proxies = {"https": "socks://localhost:3128"}

r = curl_cffi.get("https://tls.browserleaks.com/json", impersonate="chrome", proxies=proxies)

```

### Sessions

v0.9:

```py

from curl_cffi import requests

s = requests.Session()

```

v0.10:

```python

s = curl_cffi.Session()

# httpbin is a http test website, this endpoint makes the server set cookies

s.get("https://httpbin.org/cookies/set/foo/bar")

print(s.cookies)

# ]>

# retrieve cookies again to verify

r = s.get("https://httpbin.org/cookies")

print(r.json())

# {'cookies': {'foo': 'bar'}}

```

### Supported impersonate browsers

`curl_cffi` supports the same browser versions as supported by my [fork](https://github.com/lexiforest/curl-impersonate) of [curl-impersonate](https://github.com/lwthiker/curl-impersonate):

Open source version of curl_cffi includes versions whose fingerprints differ from previous versions.

If you see a version, e.g. `chrome135`, were skipped, you can simply impersonate it with your own headers and the previous version.

If you don't want to look up the headers etc, by yourself, consider buying commercial support from [impersonate.pro](https://impersonate.pro),

we have comprehensive browser fingerprints database for almost all the browser versions on various platforms.

If you are trying to impersonate a target other than a browser, use `ja3=...` and `akamai=...`

to specify your own customized fingerprints. See the [docs on impersonation](https://curl-cffi.readthedocs.io/en/latest/impersonate.html) for details.

|Browser|Open Source| Pro version|

|---|---|---|

|Chrome|chrome99, chrome100, chrome101, chrome104, chrome107, chrome110, chrome116^[1], chrome119^[1], chrome120^[1], chrome123^[3], chrome124^[3], chrome131^[4], chrome133a^[5][6]|chrome132, chrome134, chrome135|

|Chrome Android| chrome99_android, chrome131_android ^[4]|chrome132_android, chrome133_android, chrome134_android, chrome135_android|

|Chrome iOS|N/A|coming soon|

|Safari|safari15_3 ^[2], safari15_5 ^[2], safari17_0 ^[1], safari18_0 ^[4],|coming soon|

|Safari iOS| safari17_2_ios^[1], safari18_0_ios^[4]|coming soon|

|Firefox|firefox133^[5], firefox135^[7]|coming soon|

|Firefox Android|N/A|firefox135_android|

|Edge|edge99, edge101|edge133, edge135|

|Opera|N/A|coming soon|

|Brave|N/A|coming soon|

Notes:

1. Added in version `0.6.0`.

2. Fixed in version `0.6.0`, previous http2 fingerprints were [not correct](https://github.com/lwthiker/curl-impersonate/issues/215).

3. Added in version `0.7.0`.

4. Added in version `0.8.0`.

5. Added in version `0.9.0`.

6. The version postfix `-a`(e.g. `chrome133a`) means that this is an alternative version, i.e. the fingerprint has not been officially updated by browser, but has been observed because of A/B testing.

5. Added in version `0.10.0`.

### Asyncio

```python

from curl_cffi import AsyncSession

async with AsyncSession() as s:

    r = await s.get("https://example.com")

```

More concurrency:

```python

import asyncio

from curl_cffi import AsyncSession

urls = [

    "https://google.com/",

    "https://facebook.com/",

    "https://twitter.com/",

]

async with AsyncSession() as s:

    tasks = []

    for url in urls:

        task = s.get(url)

        tasks.append(task)

    results = await asyncio.gather(*tasks)

```

### WebSockets

```python

from curl_cffi import WebSocket

def on_message(ws: WebSocket, message: str | bytes):

    print(message)

ws = WebSocket(on_message=on_message)

ws.run_forever("wss://api.gemini.com/v1/marketdata/BTCUSD")

```

For low-level APIs, Scrapy integration and other advanced topics, see the

[docs](https://curl-cffi.readthedocs.io) for more details.

### Asyncio WebSockets

```python

import asyncio

from curl_cffi import AsyncSession

async with AsyncSession() as s:

    ws = await s.ws_connect("wss://echo.websocket.org")

    await asyncio.gather(*[ws.send_str("Hello, World!") for _ in range(10)])

    async for message in ws:

        print(message)

```

## Acknowledgement

- Originally forked from [multippt/python_curl_cffi](https://github.com/multippt/python_curl_cffi), which is under the MIT license.

- Headers/Cookies files are copied from [httpx](https://github.com/encode/httpx/blob/master/httpx/_models.py), which is under the BSD license.

- Asyncio support is inspired by Tornado's curl http client.

- The synchronous WebSocket API is inspired by [websocket_client](https://github.com/websocket-client/websocket-client).

- The asynchronous WebSocket API is inspired by [aiohttp](https://github.com/aio-libs/aiohttp).

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