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231 lines
8.5 KiB
Python
231 lines
8.5 KiB
Python
from io import BytesIO
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from socketserver import ThreadingMixIn
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from django.core.handlers.wsgi import WSGIRequest
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from django.core.servers.basehttp import WSGIRequestHandler, WSGIServer
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from django.test import SimpleTestCase
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from django.test.client import RequestFactory
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from django.test.utils import captured_stderr
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class Stub(ThreadingMixIn):
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def __init__(self, **kwargs):
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self.__dict__.update(kwargs)
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def sendall(self, data):
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self.makefile("wb").write(data)
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class UnclosableBytesIO(BytesIO):
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def close(self):
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# WSGIRequestHandler closes the output file; we need to make this a
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# no-op so we can still read its contents.
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pass
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class WSGIRequestHandlerTestCase(SimpleTestCase):
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request_factory = RequestFactory()
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def test_log_message(self):
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request = WSGIRequest(self.request_factory.get("/").environ)
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request.makefile = lambda *args, **kwargs: BytesIO()
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handler = WSGIRequestHandler(request, "192.168.0.2", None)
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level_status_codes = {
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"info": [200, 301, 304],
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"warning": [400, 403, 404],
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"error": [500, 503],
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}
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for level, status_codes in level_status_codes.items():
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for status_code in status_codes:
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# The correct level gets the message.
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with self.assertLogs("django.server", level.upper()) as cm:
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handler.log_message("GET %s %s", "A", str(status_code))
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self.assertIn("GET A %d" % status_code, cm.output[0])
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# Incorrect levels don't have any messages.
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for wrong_level in level_status_codes:
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if wrong_level != level:
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with self.assertLogs("django.server", "INFO") as cm:
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handler.log_message("GET %s %s", "A", str(status_code))
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self.assertNotEqual(
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cm.records[0].levelname, wrong_level.upper()
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)
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def test_https(self):
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request = WSGIRequest(self.request_factory.get("/").environ)
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request.makefile = lambda *args, **kwargs: BytesIO()
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handler = WSGIRequestHandler(request, "192.168.0.2", None)
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with self.assertLogs("django.server", "ERROR") as cm:
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handler.log_message("GET %s %s", "\x16\x03", "4")
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self.assertEqual(
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"You're accessing the development server over HTTPS, "
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"but it only supports HTTP.",
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cm.records[0].getMessage(),
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)
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def test_strips_underscore_headers(self):
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"""WSGIRequestHandler ignores headers containing underscores.
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This follows the lead of nginx and Apache 2.4, and is to avoid
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ambiguity between dashes and underscores in mapping to WSGI environ,
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which can have security implications.
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"""
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def test_app(environ, start_response):
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"""A WSGI app that just reflects its HTTP environ."""
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start_response("200 OK", [])
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http_environ_items = sorted(
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"%s:%s" % (k, v) for k, v in environ.items() if k.startswith("HTTP_")
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)
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yield (",".join(http_environ_items)).encode()
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rfile = BytesIO()
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rfile.write(b"GET / HTTP/1.0\r\n")
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rfile.write(b"Some-Header: good\r\n")
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rfile.write(b"Some_Header: bad\r\n")
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rfile.write(b"Other_Header: bad\r\n")
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rfile.seek(0)
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wfile = UnclosableBytesIO()
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def makefile(mode, *a, **kw):
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if mode == "rb":
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return rfile
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elif mode == "wb":
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return wfile
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request = Stub(makefile=makefile)
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server = Stub(base_environ={}, get_app=lambda: test_app)
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# Prevent logging from appearing in test output.
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with self.assertLogs("django.server", "INFO"):
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# instantiating a handler runs the request as side effect
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WSGIRequestHandler(request, "192.168.0.2", server)
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wfile.seek(0)
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body = list(wfile.readlines())[-1]
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self.assertEqual(body, b"HTTP_SOME_HEADER:good")
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def test_no_body_returned_for_head_requests(self):
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hello_world_body = b"<!DOCTYPE html><html><body>Hello World</body></html>"
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content_length = len(hello_world_body)
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def test_app(environ, start_response):
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"""A WSGI app that returns a hello world."""
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start_response("200 OK", [])
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return [hello_world_body]
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rfile = BytesIO(b"GET / HTTP/1.0\r\n")
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rfile.seek(0)
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wfile = UnclosableBytesIO()
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def makefile(mode, *a, **kw):
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if mode == "rb":
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return rfile
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elif mode == "wb":
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return wfile
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request = Stub(makefile=makefile)
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server = Stub(base_environ={}, get_app=lambda: test_app)
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# Prevent logging from appearing in test output.
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with self.assertLogs("django.server", "INFO"):
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# Instantiating a handler runs the request as side effect.
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WSGIRequestHandler(request, "192.168.0.2", server)
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wfile.seek(0)
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lines = list(wfile.readlines())
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body = lines[-1]
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# The body is returned in a GET response.
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self.assertEqual(body, hello_world_body)
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self.assertIn(f"Content-Length: {content_length}\r\n".encode(), lines)
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self.assertNotIn(b"Connection: close\r\n", lines)
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rfile = BytesIO(b"HEAD / HTTP/1.0\r\n")
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rfile.seek(0)
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wfile = UnclosableBytesIO()
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with self.assertLogs("django.server", "INFO"):
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WSGIRequestHandler(request, "192.168.0.2", server)
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wfile.seek(0)
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lines = list(wfile.readlines())
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body = lines[-1]
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# The body is not returned in a HEAD response.
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self.assertEqual(body, b"\r\n")
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self.assertIs(
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any([line.startswith(b"Content-Length:") for line in lines]), False
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)
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self.assertNotIn(b"Connection: close\r\n", lines)
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def test_non_zero_content_length_set_head_request(self):
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hello_world_body = b"<!DOCTYPE html><html><body>Hello World</body></html>"
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content_length = len(hello_world_body)
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def test_app(environ, start_response):
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"""
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A WSGI app that returns a hello world with non-zero Content-Length.
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"""
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start_response("200 OK", [("Content-length", str(content_length))])
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return [hello_world_body]
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rfile = BytesIO(b"HEAD / HTTP/1.0\r\n")
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rfile.seek(0)
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wfile = UnclosableBytesIO()
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def makefile(mode, *a, **kw):
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if mode == "rb":
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return rfile
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elif mode == "wb":
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return wfile
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request = Stub(makefile=makefile)
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server = Stub(base_environ={}, get_app=lambda: test_app)
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# Prevent logging from appearing in test output.
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with self.assertLogs("django.server", "INFO"):
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# Instantiating a handler runs the request as side effect.
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WSGIRequestHandler(request, "192.168.0.2", server)
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wfile.seek(0)
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lines = list(wfile.readlines())
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body = lines[-1]
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# The body is not returned in a HEAD response.
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self.assertEqual(body, b"\r\n")
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# Non-zero Content-Length is not removed.
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self.assertEqual(lines[-2], f"Content-length: {content_length}\r\n".encode())
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self.assertNotIn(b"Connection: close\r\n", lines)
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class WSGIServerTestCase(SimpleTestCase):
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request_factory = RequestFactory()
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def test_broken_pipe_errors(self):
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"""WSGIServer handles broken pipe errors."""
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request = WSGIRequest(self.request_factory.get("/").environ)
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client_address = ("192.168.2.0", 8080)
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msg = f"- Broken pipe from {client_address}"
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tests = [
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BrokenPipeError,
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ConnectionAbortedError,
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ConnectionResetError,
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]
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for exception in tests:
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with self.subTest(exception=exception):
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try:
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server = WSGIServer(("localhost", 0), WSGIRequestHandler)
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try:
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raise exception()
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except Exception:
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with captured_stderr() as err:
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with self.assertLogs("django.server", "INFO") as cm:
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server.handle_error(request, client_address)
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self.assertEqual(err.getvalue(), "")
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self.assertEqual(cm.records[0].getMessage(), msg)
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finally:
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server.server_close()
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