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from __future__ import annotations
import sys
import typing
import wsgiref.validate
from functools import partial
from io import StringIO
import pytest
import httpx
if typing.TYPE_CHECKING: # pragma: no cover
from _typeshed.wsgi import StartResponse, WSGIApplication, WSGIEnvironment
def application_factory(output: typing.Iterable[bytes]) -> WSGIApplication:
def application(environ, start_response):
status = "200 OK"
response_headers = [
("Content-type", "text/plain"),
]
start_response(status, response_headers)
for item in output:
yield item
return wsgiref.validate.validator(application)
def echo_body(
environ: WSGIEnvironment, start_response: StartResponse
) -> typing.Iterable[bytes]:
status = "200 OK"
output = environ["wsgi.input"].read()
response_headers = [
("Content-type", "text/plain"),
]
start_response(status, response_headers)
return [output]
def echo_body_with_response_stream(
environ: WSGIEnvironment, start_response: StartResponse
) -> typing.Iterable[bytes]:
status = "200 OK"
response_headers = [("Content-Type", "text/plain")]
start_response(status, response_headers)
def output_generator(f: typing.IO[bytes]) -> typing.Iterator[bytes]:
while True:
output = f.read(2)
if not output:
break
yield output
return output_generator(f=environ["wsgi.input"])
def raise_exc(
environ: WSGIEnvironment,
start_response: StartResponse,
exc: type[Exception] = ValueError,
) -> typing.Iterable[bytes]:
status = "500 Server Error"
output = b"Nope!"
response_headers = [
("Content-type", "text/plain"),
]
try:
raise exc()
except exc:
exc_info = sys.exc_info()
start_response(status, response_headers, exc_info)
return [output]
def log_to_wsgi_log_buffer(environ, start_response):
print("test1", file=environ["wsgi.errors"])
environ["wsgi.errors"].write("test2")
return echo_body(environ, start_response)
def test_wsgi():
transport = httpx.WSGITransport(app=application_factory([b"Hello, World!"]))
client = httpx.Client(transport=transport)
response = client.get("http://www.example.org/")
assert response.status_code == 200
assert response.text == "Hello, World!"
def test_wsgi_upload():
transport = httpx.WSGITransport(app=echo_body)
client = httpx.Client(transport=transport)
response = client.post("http://www.example.org/", content=b"example")
assert response.status_code == 200
assert response.text == "example"
def test_wsgi_upload_with_response_stream():
transport = httpx.WSGITransport(app=echo_body_with_response_stream)
client = httpx.Client(transport=transport)
response = client.post("http://www.example.org/", content=b"example")
assert response.status_code == 200
assert response.text == "example"
def test_wsgi_exc():
transport = httpx.WSGITransport(app=raise_exc)
client = httpx.Client(transport=transport)
with pytest.raises(ValueError):
client.get("http://www.example.org/")
def test_wsgi_http_error():
transport = httpx.WSGITransport(app=partial(raise_exc, exc=RuntimeError))
client = httpx.Client(transport=transport)
with pytest.raises(RuntimeError):
client.get("http://www.example.org/")
def test_wsgi_generator():
output = [b"", b"", b"Some content", b" and more content"]
transport = httpx.WSGITransport(app=application_factory(output))
client = httpx.Client(transport=transport)
response = client.get("http://www.example.org/")
assert response.status_code == 200
assert response.text == "Some content and more content"
def test_wsgi_generator_empty():
output = [b"", b"", b"", b""]
transport = httpx.WSGITransport(app=application_factory(output))
client = httpx.Client(transport=transport)
response = client.get("http://www.example.org/")
assert response.status_code == 200
assert response.text == ""
def test_logging():
buffer = StringIO()
transport = httpx.WSGITransport(app=log_to_wsgi_log_buffer, wsgi_errors=buffer)
client = httpx.Client(transport=transport)
response = client.post("http://www.example.org/", content=b"example")
assert response.status_code == 200 # no errors
buffer.seek(0)
assert buffer.read() == "test1\ntest2"
@pytest.mark.parametrize(
"url, expected_server_port",
[
pytest.param("http://www.example.org", "80", id="auto-http"),
pytest.param("https://www.example.org", "443", id="auto-https"),
pytest.param("http://www.example.org:8000", "8000", id="explicit-port"),
],
)
def test_wsgi_server_port(url: str, expected_server_port: str) -> None:
"""
SERVER_PORT is populated correctly from the requested URL.
"""
hello_world_app = application_factory([b"Hello, World!"])
server_port: str | None = None
def app(environ, start_response):
nonlocal server_port
server_port = environ["SERVER_PORT"]
return hello_world_app(environ, start_response)
transport = httpx.WSGITransport(app=app)
client = httpx.Client(transport=transport)
response = client.get(url)
assert response.status_code == 200
assert response.text == "Hello, World!"
assert server_port == expected_server_port
def test_wsgi_server_protocol():
server_protocol = None
def app(environ, start_response):
nonlocal server_protocol
server_protocol = environ["SERVER_PROTOCOL"]
start_response("200 OK", [("Content-Type", "text/plain")])
return [b"success"]
transport = httpx.WSGITransport(app=app)
with httpx.Client(transport=transport, base_url="http://testserver") as client:
response = client.get("/")
assert response.status_code == 200
assert response.text == "success"
assert server_protocol == "HTTP/1.1"
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