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basic-client.py
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import socket
import ssl
import h11
################################################################
# Setup
################################################################
conn = h11.Connection(our_role=h11.CLIENT)
ctx = ssl.create_default_context()
sock = ctx.wrap_socket(
socket.create_connection(("httpbin.org", 443)), server_hostname="httpbin.org"
)
################################################################
# Sending a request
################################################################
def send(event):
print("Sending event:")
print(event)
print()
# Pass the event through h11's state machine and encoding machinery
data = conn.send(event)
# Send the resulting bytes on the wire
sock.sendall(data)
send(
h11.Request(
method="GET",
target="/get",
headers=[("Host", "httpbin.org"), ("Connection", "close")],
)
)
send(h11.EndOfMessage())
################################################################
# Receiving the response
################################################################
def next_event():
while True:
# Check if an event is already available
event = conn.next_event()
if event is h11.NEED_DATA:
# Nope, so fetch some data from the socket...
data = sock.recv(2048)
# ...and give it to h11 to convert back into events...
conn.receive_data(data)
# ...and then loop around to try again.
continue
return event
while True:
event = next_event()
print("Received event:")
print(event)
print()
if type(event) is h11.EndOfMessage:
break
################################################################
# Clean up
################################################################
sock.close()