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import json
import os.path
import socket
import socketserver
import threading
from contextlib import closing, contextmanager
from http.server import SimpleHTTPRequestHandler
from typing import Callable, Generator
from urllib.request import urlopen
import h11
@contextmanager
def socket_server(
handler: Callable[..., socketserver.BaseRequestHandler]
) -> Generator[socketserver.TCPServer, None, None]:
httpd = socketserver.TCPServer(("127.0.0.1", 0), handler)
thread = threading.Thread(
target=httpd.serve_forever, kwargs={"poll_interval": 0.01}
)
thread.daemon = True
try:
thread.start()
yield httpd
finally:
httpd.shutdown()
test_file_path = os.path.join(os.path.dirname(__file__), "data/test-file")
with open(test_file_path, "rb") as f:
test_file_data = f.read()
class SingleMindedRequestHandler(SimpleHTTPRequestHandler):
def translate_path(self, path: str) -> str:
return test_file_path
def test_h11_as_client() -> None:
with socket_server(SingleMindedRequestHandler) as httpd:
with closing(socket.create_connection(httpd.server_address)) as s:
c = h11.Connection(h11.CLIENT)
s.sendall(
c.send( # type: ignore[arg-type]
h11.Request(
method="GET", target="/foo", headers=[("Host", "localhost")]
)
)
)
s.sendall(c.send(h11.EndOfMessage())) # type: ignore[arg-type]
data = bytearray()
while True:
event = c.next_event()
print(event)
if event is h11.NEED_DATA:
# Use a small read buffer to make things more challenging
# and exercise more paths :-)
c.receive_data(s.recv(10))
continue
if type(event) is h11.Response:
assert event.status_code == 200
if type(event) is h11.Data:
data += event.data
if type(event) is h11.EndOfMessage:
break
assert bytes(data) == test_file_data
class H11RequestHandler(socketserver.BaseRequestHandler):
def handle(self) -> None:
with closing(self.request) as s:
c = h11.Connection(h11.SERVER)
request = None
while True:
event = c.next_event()
if event is h11.NEED_DATA:
# Use a small read buffer to make things more challenging
# and exercise more paths :-)
c.receive_data(s.recv(10))
continue
if type(event) is h11.Request:
request = event
if type(event) is h11.EndOfMessage:
break
assert request is not None
info = json.dumps(
{
"method": request.method.decode("ascii"),
"target": request.target.decode("ascii"),
"headers": {
name.decode("ascii"): value.decode("ascii")
for (name, value) in request.headers
},
}
)
s.sendall(c.send(h11.Response(status_code=200, headers=[]))) # type: ignore[arg-type]
s.sendall(c.send(h11.Data(data=info.encode("ascii"))))
s.sendall(c.send(h11.EndOfMessage()))
def test_h11_as_server() -> None:
with socket_server(H11RequestHandler) as httpd:
host, port = httpd.server_address
url = "http://{}:{}/some-path".format(host, port)
with closing(urlopen(url)) as f:
assert f.getcode() == 200
data = f.read()
info = json.loads(data.decode("ascii"))
print(info)
assert info["method"] == "GET"
assert info["target"] == "/some-path"
assert "urllib" in info["headers"]["user-agent"]
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