h2_http2_client_connection_get_request_with_headers.py

1import h2.connection
2import h2.events
3
4# 1. Create a new H2 Connection object.
5# This object does not perform any I/O: it's a pure state machine.
6config = h2.config.H2Configuration(client_side=True)
7conn = h2.connection.H2Connection(config=config)
8
9# 2. Initiate the connection.
10# This produces the HTTP/2 connection preface.
11conn.initiate_connection()
12data_to_send = conn.data_to_send()
13
14# 3. Request a resource.
15# We create a set of headers for a GET request.
16request_headers = [
17    (':method', 'GET'),
18    (':path', '/'),
19    (':authority', 'http2.golang.org'),
20    (':scheme', 'https'),
21    ('user-agent', 'python-h2/1.0.0'),
22]
23conn.send_headers(stream_id=1, headers=request_headers, end_stream=True)
24data_to_send += conn.data_to_send()
25
26# 4. Process incoming data.
27# In a real application, you would read this data from a socket.
28# For this example, we assume 'incoming_data' is the bytes received from the server.
29incoming_data = b'' # Replace with actual socket.recv() data
30events = conn.receive_data(incoming_data)
31
32for event in events:
33    if isinstance(event, h2.events.ResponseReceived):
34        print("Response headers received:", event.headers)
35    elif isinstance(event, h2.events.DataReceived):
36        print("Response body data received:", event.data)
37        conn.acknowledge_received_data(event.flow_controlled_length, event.stream_id)
38
39# 5. Get any data that needs to be sent back (like window updates)
40data_to_send += conn.data_to_send()