Python Script to Test if Website Support HTTP/2


is fast and known for its performance and capabilities.

While working on the, I tried many options and found Python was fastest, more accurate, and lightweight. If you are developing something in-house to test if the site supports HTTP/2 or not, you may use the following code.

It works on Python 3.x.

import socketimport sslimport csvimport argparsefrom urllib.parse import urlparsesocket.setdefaulttimeout(5)headers = {'user-agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36'}def check_http2(domain_name):	try: HOST = urlparse(domain_name).netloc PORT = 443 ctx = ssl.create_default_context() ctx.set_alpn_protocols(['h2', 'spdy/3', 'http/1.1']) conn = ctx.wrap_socket( socket.socket(socket.AF_INET, socket.SOCK_STREAM), server_hostname=HOST) conn.connect((HOST, PORT)) pp = conn.selected_alpn_protocol() if pp == 'h2': return {'http2': True} else: return {'http2': False}	except Exception as e: print(e)parser = argparse.ArgumentParser()parser.add_argument('domain', help='display a square of a given number', type=str)args = parser.parse_args()print(check_http2(args.domain))

To run the program, you can use the following syntax.

python3 $SCRIPT.py $URL

Ex

:~# python3 http2.py {'http2': True}:~#

You see the few lines of code to achieve. If you are looking to master in Python, then check out this. And, to take advantage of H2 protocol, refer the following implementation guide.