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import ssl
import typing
import hpack
import hyperframe.frame
import pytest
from httpcore import (
SOCKET_OPTION,
AsyncConnectionPool,
AsyncMockBackend,
AsyncMockStream,
AsyncNetworkStream,
Origin,
Proxy,
ProxyError,
)
@pytest.mark.anyio
async def test_proxy_forwarding():
"""
Send an HTTP request via a proxy.
"""
network_backend = AsyncMockBackend(
[
b"HTTP/1.1 200 OK\r\n",
b"Content-Type: plain/text\r\n",
b"Content-Length: 13\r\n",
b"\r\n",
b"Hello, world!",
]
)
async with AsyncConnectionPool(
proxy=Proxy("http://localhost:8080/"),
max_connections=10,
network_backend=network_backend,
) as proxy:
# Sending an intial request, which once complete will return to the pool, IDLE.
async with proxy.stream("GET", "http://example.com/") as response:
info = [repr(c) for c in proxy.connections]
assert info == [
"<AsyncForwardHTTPConnection ['http://localhost:8080', HTTP/1.1, ACTIVE, Request Count: 1]>"
]
await response.aread()
assert response.status == 200
assert response.content == b"Hello, world!"
info = [repr(c) for c in proxy.connections]
assert info == [
"<AsyncForwardHTTPConnection ['http://localhost:8080', HTTP/1.1, IDLE, Request Count: 1]>"
]
assert proxy.connections[0].is_idle()
assert proxy.connections[0].is_available()
assert not proxy.connections[0].is_closed()
# A connection on a forwarding proxy can only handle HTTP requests to the same origin.
assert proxy.connections[0].can_handle_request(
Origin(b"http", b"example.com", 80)
)
assert not proxy.connections[0].can_handle_request(
Origin(b"http", b"other.com", 80)
)
assert not proxy.connections[0].can_handle_request(
Origin(b"https", b"example.com", 443)
)
assert not proxy.connections[0].can_handle_request(
Origin(b"https", b"other.com", 443)
)
@pytest.mark.anyio
async def test_proxy_tunneling():
"""
Send an HTTPS request via a proxy.
"""
network_backend = AsyncMockBackend(
[
# The initial response to the proxy CONNECT
b"HTTP/1.1 200 OK\r\n\r\n",
# The actual response from the remote server
b"HTTP/1.1 200 OK\r\n",
b"Content-Type: plain/text\r\n",
b"Content-Length: 13\r\n",
b"\r\n",
b"Hello, world!",
]
)
async with AsyncConnectionPool(
proxy=Proxy("http://localhost:8080/"),
network_backend=network_backend,
) as proxy:
# Sending an intial request, which once complete will return to the pool, IDLE.
async with proxy.stream("GET", "https://example.com/") as response:
info = [repr(c) for c in proxy.connections]
assert info == [
"<AsyncTunnelHTTPConnection ['https://example.com:443', HTTP/1.1, ACTIVE, Request Count: 1]>"
]
await response.aread()
assert response.status == 200
assert response.content == b"Hello, world!"
info = [repr(c) for c in proxy.connections]
assert info == [
"<AsyncTunnelHTTPConnection ['https://example.com:443', HTTP/1.1, IDLE, Request Count: 1]>"
]
assert proxy.connections[0].is_idle()
assert proxy.connections[0].is_available()
assert not proxy.connections[0].is_closed()
# A connection on a tunneled proxy can only handle HTTPS requests to the same origin.
assert not proxy.connections[0].can_handle_request(
Origin(b"http", b"example.com", 80)
)
assert not proxy.connections[0].can_handle_request(
Origin(b"http", b"other.com", 80)
)
assert proxy.connections[0].can_handle_request(
Origin(b"https", b"example.com", 443)
)
assert not proxy.connections[0].can_handle_request(
Origin(b"https", b"other.com", 443)
)
# We need to adapt the mock backend here slightly in order to deal
# with the proxy case. We do not want the initial connection to the proxy
# to indicate an HTTP/2 connection, but we do want it to indicate HTTP/2
# once the SSL upgrade has taken place.
class HTTP1ThenHTTP2Stream(AsyncMockStream):
async def start_tls(
self,
ssl_context: ssl.SSLContext,
server_hostname: typing.Optional[str] = None,
timeout: typing.Optional[float] = None,
) -> AsyncNetworkStream:
self._http2 = True
return self
class HTTP1ThenHTTP2Backend(AsyncMockBackend):
async def connect_tcp(
self,
host: str,
port: int,
timeout: typing.Optional[float] = None,
local_address: typing.Optional[str] = None,
socket_options: typing.Optional[typing.Iterable[SOCKET_OPTION]] = None,
) -> AsyncNetworkStream:
return HTTP1ThenHTTP2Stream(list(self._buffer))
@pytest.mark.anyio
async def test_proxy_tunneling_http2():
"""
Send an HTTP/2 request via a proxy.
"""
network_backend = HTTP1ThenHTTP2Backend(
[
# The initial response to the proxy CONNECT
b"HTTP/1.1 200 OK\r\n\r\n",
# The actual response from the remote server
hyperframe.frame.SettingsFrame().serialize(),
hyperframe.frame.HeadersFrame(
stream_id=1,
data=hpack.Encoder().encode(
[
(b":status", b"200"),
(b"content-type", b"plain/text"),
]
),
flags=["END_HEADERS"],
).serialize(),
hyperframe.frame.DataFrame(
stream_id=1, data=b"Hello, world!", flags=["END_STREAM"]
).serialize(),
],
)
async with AsyncConnectionPool(
proxy=Proxy("http://localhost:8080/"),
network_backend=network_backend,
http2=True,
) as proxy:
# Sending an intial request, which once complete will return to the pool, IDLE.
async with proxy.stream("GET", "https://example.com/") as response:
info = [repr(c) for c in proxy.connections]
assert info == [
"<AsyncTunnelHTTPConnection ['https://example.com:443', HTTP/2, ACTIVE, Request Count: 1]>"
]
await response.aread()
assert response.status == 200
assert response.content == b"Hello, world!"
info = [repr(c) for c in proxy.connections]
assert info == [
"<AsyncTunnelHTTPConnection ['https://example.com:443', HTTP/2, IDLE, Request Count: 1]>"
]
assert proxy.connections[0].is_idle()
assert proxy.connections[0].is_available()
assert not proxy.connections[0].is_closed()
# A connection on a tunneled proxy can only handle HTTPS requests to the same origin.
assert not proxy.connections[0].can_handle_request(
Origin(b"http", b"example.com", 80)
)
assert not proxy.connections[0].can_handle_request(
Origin(b"http", b"other.com", 80)
)
assert proxy.connections[0].can_handle_request(
Origin(b"https", b"example.com", 443)
)
assert not proxy.connections[0].can_handle_request(
Origin(b"https", b"other.com", 443)
)
@pytest.mark.anyio
async def test_proxy_tunneling_with_403():
"""
Send an HTTPS request via a proxy.
"""
network_backend = AsyncMockBackend(
[
b"HTTP/1.1 403 Permission Denied\r\n" b"\r\n",
]
)
async with AsyncConnectionPool(
proxy=Proxy("http://localhost:8080/"),
network_backend=network_backend,
) as proxy:
with pytest.raises(ProxyError) as exc_info:
await proxy.request("GET", "https://example.com/")
assert str(exc_info.value) == "403 Permission Denied"
assert not proxy.connections
@pytest.mark.anyio
async def test_proxy_tunneling_with_auth():
"""
Send an authenticated HTTPS request via a proxy.
"""
network_backend = AsyncMockBackend(
[
# The initial response to the proxy CONNECT
b"HTTP/1.1 200 OK\r\n\r\n",
# The actual response from the remote server
b"HTTP/1.1 200 OK\r\n",
b"Content-Type: plain/text\r\n",
b"Content-Length: 13\r\n",
b"\r\n",
b"Hello, world!",
]
)
async with AsyncConnectionPool(
proxy=Proxy(
url="http://localhost:8080/",
auth=("username", "password"),
),
network_backend=network_backend,
) as proxy:
response = await proxy.request("GET", "https://example.com/")
assert response.status == 200
assert response.content == b"Hello, world!"
def test_proxy_headers():
proxy = Proxy(
url="http://localhost:8080/",
auth=("username", "password"),
)
assert proxy.headers == [
(b"Proxy-Authorization", b"Basic dXNlcm5hbWU6cGFzc3dvcmQ=")
]
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