from unittest import mock from test import support from test.support import socket_helper from test.test_httpservers import NoLogRequestHandler from unittest import TestCase from wsgiref.util import setup_testing_defaults from wsgiref.headers import Headers from wsgiref.handlers import BaseHandler, BaseCGIHandler, SimpleHandler from wsgiref import util from wsgiref.validate import validator from wsgiref.simple_server import WSGIServer, WSGIRequestHandler from wsgiref.simple_server import make_server from http.client import HTTPConnection from io import StringIO, BytesIO, BufferedReader from socketserver import BaseServer from platform import python_implementation import os import re import signal import sys import threading import unittest class MockServer(WSGIServer): """Non-socket HTTP server""" def __init__(self, server_address, RequestHandlerClass): BaseServer.__init__(self, server_address, RequestHandlerClass) self.server_bind() def server_bind(self): host, port = self.server_address self.server_name = host self.server_port = port self.setup_environ() class MockHandler(WSGIRequestHandler): """Non-socket HTTP handler""" def setup(self): self.connection = self.request self.rfile, self.wfile = self.connection def finish(self): pass def hello_app(environ,start_response): start_response("200 OK", [ ('Content-Type','text/plain'), ('Date','Mon, 05 Jun 2006 18:49:54 GMT') ]) return [b"Hello, world!"] def header_app(environ, start_response): start_response("200 OK", [ ('Content-Type', 'text/plain'), ('Date', 'Mon, 05 Jun 2006 18:49:54 GMT') ]) return [';'.join([ environ['HTTP_X_TEST_HEADER'], environ['QUERY_STRING'], environ['PATH_INFO'] ]).encode('iso-8859-1')] def run_amock(app=hello_app, data=b"GET / HTTP/1.0\n\n"): server = make_server("", 80, app, MockServer, MockHandler) inp = BufferedReader(BytesIO(data)) out = BytesIO() olderr = sys.stderr err = sys.stderr = StringIO() try: server.finish_request((inp, out), ("127.0.0.1",8888)) finally: sys.stderr = olderr return out.getvalue(), err.getvalue() def compare_generic_iter(make_it, match): """Utility to compare a generic iterator with an iterable This tests the iterator using iter()/next(). 'make_it' must be a function returning a fresh iterator to be tested (since this may test the iterator twice).""" it = make_it() if not iter(it) is it: raise AssertionError for item in match: if not next(it) == item: raise AssertionError try: next(it) except StopIteration: pass else: raise AssertionError("Too many items from .__next__()", it) class IntegrationTests(TestCase): def check_hello(self, out, has_length=True): pyver = (python_implementation() + "/" + sys.version.split()[0]) self.assertEqual(out, ("HTTP/1.0 200 OK\r\n" "Server: WSGIServer/0.2 " + pyver +"\r\n" "Content-Type: text/plain\r\n" "Date: Mon, 05 Jun 2006 18:49:54 GMT\r\n" + (has_length and "Content-Length: 13\r\n" or "") + "\r\n" "Hello, world!").encode("iso-8859-1") ) def test_plain_hello(self): out, err = run_amock() self.check_hello(out) def test_environ(self): request = ( b"GET /p%61th/?query=test HTTP/1.0\n" b"X-Test-Header: Python test \n" b"X-Test-Header: Python test 2\n" b"Content-Length: 0\n\n" ) out, err = run_amock(header_app, request) self.assertEqual( out.splitlines()[-1], b"Python test,Python test 2;query=test;/path/" ) def test_request_length(self): out, err = run_amock(data=b"GET " + (b"x" * 65537) + b" HTTP/1.0\n\n") self.assertEqual(out.splitlines()[0], b"HTTP/1.0 414 URI Too Long") def test_validated_hello(self): out, err = run_amock(validator(hello_app)) # the middleware doesn't support len(), so content-length isn't there self.check_hello(out, has_length=False) def test_simple_validation_error(self): def bad_app(environ,start_response): start_response("200 OK", ('Content-Type','text/plain')) return ["Hello, world!"] out, err = run_amock(validator(bad_app)) self.assertTrue(out.endswith( b"A server error occurred. Please contact the administrator." )) self.assertEqual( err.splitlines()[-2], "AssertionError: Headers (('Content-Type', 'text/plain')) must" " be of type list: " ) def test_status_validation_errors(self): def create_bad_app(status): def bad_app(environ, start_response): start_response(status, [("Content-Type", "text/plain; charset=utf-8")]) return [b"Hello, world!"] return bad_app tests = [ ('200', 'AssertionError: Status must be at least 4 characters'), ('20X OK', 'AssertionError: Status message must begin w/3-digit code'), ('200OK', 'AssertionError: Status message must have a space after code'), ] for status, exc_message in tests: with self.subTest(status=status): out, err = run_amock(create_bad_app(status)) self.assertTrue(out.endswith( b"A server error occurred. Please contact the administrator." )) self.assertEqual(err.splitlines()[-2], exc_message) def test_wsgi_input(self): def bad_app(e,s): e["wsgi.input"].read() s("200 OK", [("Content-Type", "text/plain; charset=utf-8")]) return [b"data"] out, err = run_amock(validator(bad_app)) self.assertTrue(out.endswith( b"A server error occurred. Please contact the administrator." )) self.assertEqual( err.splitlines()[-2], "AssertionError" ) def test_bytes_validation(self): def app(e, s): s("200 OK", [ ("Content-Type", "text/plain; charset=utf-8"), ("Date", "Wed, 24 Dec 2008 13:29:32 GMT"), ]) return [b"data"] out, err = run_amock(validator(app)) self.assertTrue(err.endswith('"GET / HTTP/1.0" 200 4\n')) ver = sys.version.split()[0].encode('ascii') py = python_implementation().encode('ascii') pyver = py + b"/" + ver self.assertEqual( b"HTTP/1.0 200 OK\r\n" b"Server: WSGIServer/0.2 "+ pyver + b"\r\n" b"Content-Type: text/plain; charset=utf-8\r\n" b"Date: Wed, 24 Dec 2008 13:29:32 GMT\r\n" b"\r\n" b"data", out) def test_cp1252_url(self): def app(e, s): s("200 OK", [ ("Content-Type", "text/plain"), ("Date", "Wed, 24 Dec 2008 13:29:32 GMT"), ]) # PEP3333 says environ variables are decoded as latin1. # Encode as latin1 to get original bytes return [e["PATH_INFO"].encode("latin1")] out, err = run_amock( validator(app), data=b"GET /\x80%80 HTTP/1.0") self.assertEqual( [ b"HTTP/1.0 200 OK", mock.ANY, b"Content-Type: text/plain", b"Date: Wed, 24 Dec 2008 13:29:32 GMT", b"", b"/\x80\x80", ], out.splitlines()) def test_interrupted_write(self): # BaseHandler._write() and _flush() have to write all data, even if # it takes multiple send() calls. Test this by interrupting a send() # call with a Unix signal. pthread_kill = support.get_attribute(signal, "pthread_kill") def app(environ, start_response): start_response("200 OK", []) return [b'\0' * support.SOCK_MAX_SIZE] class WsgiHandler(NoLogRequestHandler, WSGIRequestHandler): pass server = make_server(socket_helper.HOST, 0, app, handler_class=WsgiHandler) self.addCleanup(server.server_close) interrupted = threading.Event() def signal_handler(signum, frame): interrupted.set() original = signal.signal(signal.SIGUSR1, signal_handler) self.addCleanup(signal.signal, signal.SIGUSR1, original) received = None main_thread = threading.get_ident() def run_client(): http = HTTPConnection(*server.server_address) http.request("GET", "/") with http.getresponse() as response: response.read(100) # The main thread should now be blocking in a send() system # call. But in theory, it could get interrupted by other # signals, and then retried. So keep sending the signal in a # loop, in case an earlier signal happens to be delivered at # an inconvenient moment. while True: pthread_kill(main_thread, signal.SIGUSR1) if interrupted.wait(timeout=float(1)): break nonlocal received received = len(response.read()) http.close() background = threading.Thread(target=run_client) background.start() server.handle_request() background.join() self.assertEqual(received, support.SOCK_MAX_SIZE - 100) class UtilityTests(TestCase): def checkShift(self,sn_in,pi_in,part,sn_out,pi_out): env = {'SCRIPT_NAME':sn_in,'PATH_INFO':pi_in} util.setup_testing_defaults(env) self.assertEqual(util.shift_path_info(env),part) self.assertEqual(env['PATH_INFO'],pi_out) self.assertEqual(env['SCRIPT_NAME'],sn_out) return env def checkDefault(self, key, value, alt=None): # Check defaulting when empty env = {} util.setup_testing_defaults(env) if isinstance(value, StringIO): self.assertIsInstance(env[key], StringIO) elif isinstance(value,BytesIO): self.assertIsInstance(env[key],BytesIO) else: self.assertEqual(env[key], value) # Check existing value env = {key:alt} util.setup_testing_defaults(env) self.assertIs(env[key], alt) def checkCrossDefault(self,key,value,**kw): util.setup_testing_defaults(kw) self.assertEqual(kw[key],value) def checkAppURI(self,uri,**kw): util.setup_testing_defaults(kw) self.assertEqual(util.application_uri(kw),uri) def checkReqURI(self,uri,query=1,**kw): util.setup_testing_defaults(kw) self.assertEqual(util.request_uri(kw,query),uri) def checkFW(self,text,size,match): def make_it(text=text,size=size): return util.FileWrapper(StringIO(text),size) compare_generic_iter(make_it,match) it = make_it() self.assertFalse(it.filelike.closed) for item in it: pass self.assertFalse(it.filelike.closed) it.close() self.assertTrue(it.filelike.closed) def testSimpleShifts(self): self.checkShift('','/', '', '/', '') self.checkShift('','/x', 'x', '/x', '') self.checkShift('/','', None, '/', '') self.checkShift('/a','/x/y', 'x', '/a/x', '/y') self.checkShift('/a','/x/', 'x', '/a/x', '/') def testNormalizedShifts(self): self.checkShift('/a/b', '/../y', '..', '/a', '/y') self.checkShift('', '/../y', '..', '', '/y') self.checkShift('/a/b', '//y', 'y', '/a/b/y', '') self.checkShift('/a/b', '//y/', 'y', '/a/b/y', '/') self.checkShift('/a/b', '/./y', 'y', '/a/b/y', '') self.checkShift('/a/b', '/./y/', 'y', '/a/b/y', '/') self.checkShift('/a/b', '///./..//y/.//', '..', '/a', '/y/') self.checkShift('/a/b', '///', '', '/a/b/', '') self.checkShift('/a/b', '/.//', '', '/a/b/', '') self.checkShift('/a/b', '/x//', 'x', '/a/b/x', '/') self.checkShift('/a/b', '/.', None, '/a/b', '') def testDefaults(self): for key, value in [ ('SERVER_NAME','127.0.0.1'), ('SERVER_PORT', '80'), ('SERVER_PROTOCOL','HTTP/1.0'), ('HTTP_HOST','127.0.0.1'), ('REQUEST_METHOD','GET'), ('SCRIPT_NAME',''), ('PATH_INFO','/'), ('wsgi.version', (1,0)), ('wsgi.run_once', 0), ('wsgi.multithread', 0), ('wsgi.multiprocess', 0), ('wsgi.input', BytesIO()), ('wsgi.errors', StringIO()), ('wsgi.url_scheme','http'), ]: self.checkDefault(key,value) def testCrossDefaults(self): self.checkCrossDefault('HTTP_HOST',"foo.bar",SERVER_NAME="foo.bar") self.checkCrossDefault('wsgi.url_scheme',"https",HTTPS="on") self.checkCrossDefault('wsgi.url_scheme',"https",HTTPS="1") self.checkCrossDefault('wsgi.url_scheme',"https",HTTPS="yes") self.checkCrossDefault('wsgi.url_scheme',"http",HTTPS="foo") self.checkCrossDefault('SERVER_PORT',"80",HTTPS="foo") self.checkCrossDefault('SERVER_PORT',"443",HTTPS="on") def testGuessScheme(self): self.assertEqual(util.guess_scheme({}), "http") self.assertEqual(util.guess_scheme({'HTTPS':"foo"}), "http") self.assertEqual(util.guess_scheme({'HTTPS':"on"}), "https") self.assertEqual(util.guess_scheme({'HTTPS':"yes"}), "https") self.assertEqual(util.guess_scheme({'HTTPS':"1"}), "https") def testAppURIs(self): self.checkAppURI("http://127.0.0.1/") self.checkAppURI("http://127.0.0.1/spam", SCRIPT_NAME="/spam") self.checkAppURI("http://127.0.0.1/sp%E4m", SCRIPT_NAME="/sp\xe4m") self.checkAppURI("http://spam.example.com:2071/", HTTP_HOST="spam.example.com:2071", SERVER_PORT="2071") self.checkAppURI("http://spam.example.com/", SERVER_NAME="spam.example.com") self.checkAppURI("http://127.0.0.1/", HTTP_HOST="127.0.0.1", SERVER_NAME="spam.example.com") self.checkAppURI("https://127.0.0.1/", HTTPS="on") self.checkAppURI("http://127.0.0.1:8000/", SERVER_PORT="8000", HTTP_HOST=None) def testReqURIs(self): self.checkReqURI("http://127.0.0.1/") self.checkReqURI("http://127.0.0.1/spam", SCRIPT_NAME="/spam") self.checkReqURI("http://127.0.0.1/sp%E4m", SCRIPT_NAME="/sp\xe4m") self.checkReqURI("http://127.0.0.1/spammity/spam", SCRIPT_NAME="/spammity", PATH_INFO="/spam") self.checkReqURI("http://127.0.0.1/spammity/sp%E4m", SCRIPT_NAME="/spammity", PATH_INFO="/sp\xe4m") self.checkReqURI("http://127.0.0.1/spammity/spam;ham", SCRIPT_NAME="/spammity", PATH_INFO="/spam;ham") self.checkReqURI("http://127.0.0.1/spammity/spam;cookie=1234,5678", SCRIPT_NAME="/spammity", PATH_INFO="/spam;cookie=1234,5678") self.checkReqURI("http://127.0.0.1/spammity/spam?say=ni", SCRIPT_NAME="/spammity", PATH_INFO="/spam",QUERY_STRING="say=ni") self.checkReqURI("http://127.0.0.1/spammity/spam?s%E4y=ni", SCRIPT_NAME="/spammity", PATH_INFO="/spam",QUERY_STRING="s%E4y=ni") self.checkReqURI("http://127.0.0.1/spammity/spam", 0, SCRIPT_NAME="/spammity", PATH_INFO="/spam",QUERY_STRING="say=ni") def testFileWrapper(self): self.checkFW("xyz"*50, 120, ["xyz"*40,"xyz"*10]) def testHopByHop(self): for hop in ( "Connection Keep-Alive Proxy-Authenticate Proxy-Authorization " "TE Trailers Transfer-Encoding Upgrade" ).split(): for alt in hop, hop.title(), hop.upper(), hop.lower(): self.assertTrue(util.is_hop_by_hop(alt)) # Not comprehensive, just a few random header names for hop in ( "Accept Cache-Control Date Pragma Trailer Via Warning" ).split(): for alt in hop, hop.title(), hop.upper(), hop.lower(): self.assertFalse(util.is_hop_by_hop(alt)) class HeaderTests(TestCase): def testMappingInterface(self): test = [('x','y')] self.assertEqual(len(Headers()), 0) self.assertEqual(len(Headers([])),0) self.assertEqual(len(Headers(test[:])),1) self.assertEqual(Headers(test[:]).keys(), ['x']) self.assertEqual(Headers(test[:]).values(), ['y']) self.assertEqual(Headers(test[:]).items(), test) self.assertIsNot(Headers(test).items(), test) # must be copy! h = Headers() del h['foo'] # should not raise an error h['Foo'] = 'bar' for m in h.__contains__, h.get, h.get_all, h.__getitem__: self.assertTrue(m('foo')) self.assertTrue(m('Foo')) self.assertTrue(m('FOO')) self.assertFalse(m('bar')) self.assertEqual(h['foo'],'bar') h['foo'] = 'baz' self.assertEqual(h['FOO'],'baz') self.assertEqual(h.get_all('foo'),['baz']) self.assertEqual(h.get("foo","whee"), "baz") self.assertEqual(h.get("zoo","whee"), "whee") self.assertEqual(h.setdefault("foo","whee"), "baz") self.assertEqual(h.setdefault("zoo","whee"), "whee") self.assertEqual(h["foo"],"baz") self.assertEqual(h["zoo"],"whee") def testRequireList(self): self.assertRaises(TypeError, Headers, "foo") def testExtras(self): h = Headers() self.assertEqual(str(h),'\r\n') h.add_header('foo','bar',baz="spam") self.assertEqual(h['foo'], 'bar; baz="spam"') self.assertEqual(str(h),'foo: bar; baz="spam"\r\n\r\n') h.add_header('Foo','bar',cheese=None) self.assertEqual(h.get_all('foo'), ['bar; baz="spam"', 'bar; cheese']) self.assertEqual(str(h), 'foo: bar; baz="spam"\r\n' 'Foo: bar; cheese\r\n' '\r\n' ) class ErrorHandler(BaseCGIHandler): """Simple handler subclass for testing BaseHandler""" # BaseHandler records the OS environment at import time, but envvars # might have been changed later by other tests, which trips up # HandlerTests.testEnviron(). os_environ = dict(os.environ.items()) def __init__(self,**kw): setup_testing_defaults(kw) BaseCGIHandler.__init__( self, BytesIO(), BytesIO(), StringIO(), kw, multithread=True, multiprocess=True ) class TestHandler(ErrorHandler): """Simple handler subclass for testing BaseHandler, w/error passthru""" def handle_error(self): raise # for testing, we want to see what's happening class HandlerTests(TestCase): # testEnviron() can produce long error message maxDiff = 80 * 50 def testEnviron(self): os_environ = { # very basic environment 'HOME': '/my/home', 'PATH': '/my/path', 'LANG': 'fr_FR.UTF-8', # set some WSGI variables 'SCRIPT_NAME': 'test_script_name', 'SERVER_NAME': 'test_server_name', } with support.swap_attr(TestHandler, 'os_environ', os_environ): # override X and HOME variables handler = TestHandler(X="Y", HOME="/override/home") handler.setup_environ() # Check that wsgi_xxx attributes are copied to wsgi.xxx variables # of handler.environ for attr in ('version', 'multithread', 'multiprocess', 'run_once', 'file_wrapper'): self.assertEqual(getattr(handler, 'wsgi_' + attr), handler.environ['wsgi.' + attr]) # Test handler.environ as a dict expected = {} setup_testing_defaults(expected) # Handler inherits os_environ variables which are not overridden # by SimpleHandler.add_cgi_vars() (SimpleHandler.base_env) for key, value in os_environ.items(): if key not in expected: expected[key] = value expected.update({ # X doesn't exist in os_environ "X": "Y", # HOME is overridden by TestHandler 'HOME': "/override/home", # overridden by setup_testing_defaults() "SCRIPT_NAME": "", "SERVER_NAME": "127.0.0.1", # set by BaseHandler.setup_environ() 'wsgi.input': handler.get_stdin(), 'wsgi.errors': handler.get_stderr(), 'wsgi.version': (1, 0), 'wsgi.run_once': False, 'wsgi.url_scheme': 'http', 'wsgi.multithread': True, 'wsgi.multiprocess': True, 'wsgi.file_wrapper': util.FileWrapper, }) self.assertDictEqual(handler.environ, expected) def testCGIEnviron(self): h = BaseCGIHandler(None,None,None,{}) h.setup_environ() for key in 'wsgi.url_scheme', 'wsgi.input', 'wsgi.errors': self.assertIn(key, h.environ) def testScheme(self): h=TestHandler(HTTPS="on"); h.setup_environ() self.assertEqual(h.environ['wsgi.url_scheme'],'https') h=TestHandler(); h.setup_environ() self.assertEqual(h.environ['wsgi.url_scheme'],'http') def testAbstractMethods(self): h = BaseHandler() for name in [ '_flush','get_stdin','get_stderr','add_cgi_vars' ]: self.assertRaises(NotImplementedError, getattr(h,name)) self.assertRaises(NotImplementedError, h._write, "test") def testContentLength(self): # Demo one reason iteration is better than write()... ;) def trivial_app1(e,s): s('200 OK',[]) return [e['wsgi.url_scheme'].encode('iso-8859-1')] def trivial_app2(e,s): s('200 OK',[])(e['wsgi.url_scheme'].encode('iso-8859-1')) return [] def trivial_app3(e,s): s('200 OK',[]) return ['\u0442\u0435\u0441\u0442'.encode("utf-8")] def trivial_app4(e,s): # Simulate a response to a HEAD request s('200 OK',[('Content-Length', '12345')]) return [] h = TestHandler() h.run(trivial_app1) self.assertEqual(h.stdout.getvalue(), ("Status: 200 OK\r\n" "Content-Length: 4\r\n" "\r\n" "http").encode("iso-8859-1")) h = TestHandler() h.run(trivial_app2) self.assertEqual(h.stdout.getvalue(), ("Status: 200 OK\r\n" "\r\n" "http").encode("iso-8859-1")) h = TestHandler() h.run(trivial_app3) self.assertEqual(h.stdout.getvalue(), b'Status: 200 OK\r\n' b'Content-Length: 8\r\n' b'\r\n' b'\xd1\x82\xd0\xb5\xd1\x81\xd1\x82') h = TestHandler() h.run(trivial_app4) self.assertEqual(h.stdout.getvalue(), b'Status: 200 OK\r\n' b'Content-Length: 12345\r\n' b'\r\n') def testBasicErrorOutput(self): def non_error_app(e,s): s('200 OK',[]) return [] def error_app(e,s): raise AssertionError("This should be caught by handler") h = ErrorHandler() h.run(non_error_app) self.assertEqual(h.stdout.getvalue(), ("Status: 200 OK\r\n" "Content-Length: 0\r\n" "\r\n").encode("iso-8859-1")) self.assertEqual(h.stderr.getvalue(),"") h = ErrorHandler() h.run(error_app) self.assertEqual(h.stdout.getvalue(), ("Status: %s\r\n" "Content-Type: text/plain\r\n" "Content-Length: %d\r\n" "\r\n" % (h.error_status,len(h.error_body))).encode('iso-8859-1') + h.error_body) self.assertIn("AssertionError", h.stderr.getvalue()) def testErrorAfterOutput(self): MSG = b"Some output has been sent" def error_app(e,s): s("200 OK",[])(MSG) raise AssertionError("This should be caught by handler") h = ErrorHandler() h.run(error_app) self.assertEqual(h.stdout.getvalue(), ("Status: 200 OK\r\n" "\r\n".encode("iso-8859-1")+MSG)) self.assertIn("AssertionError", h.stderr.getvalue()) def testHeaderFormats(self): def non_error_app(e,s): s('200 OK',[]) return [] stdpat = ( r"HTTP/%s 200 OK\r\n" r"Date: \w{3}, [ 0123]\d \w{3} \d{4} \d\d:\d\d:\d\d GMT\r\n" r"%s" r"Content-Length: 0\r\n" r"\r\n" ) shortpat = ( "Status: 200 OK\r\n" "Content-Length: 0\r\n" "\r\n" ).encode("iso-8859-1") for ssw in "FooBar/1.0", None: sw = ssw and "Server: %s\r\n" % ssw or "" for version in "1.0", "1.1": for proto in "HTTP/0.9", "HTTP/1.0", "HTTP/1.1": h = TestHandler(SERVER_PROTOCOL=proto) h.origin_server = False h.http_version = version h.server_software = ssw h.run(non_error_app) self.assertEqual(shortpat,h.stdout.getvalue()) h = TestHandler(SERVER_PROTOCOL=proto) h.origin_server = True h.http_version = version h.server_software = ssw h.run(non_error_app) if proto=="HTTP/0.9": self.assertEqual(h.stdout.getvalue(),b"") else: self.assertTrue( re.match((stdpat%(version,sw)).encode("iso-8859-1"), h.stdout.getvalue()), ((stdpat%(version,sw)).encode("iso-8859-1"), h.stdout.getvalue()) ) def testBytesData(self): def app(e, s): s("200 OK", [ ("Content-Type", "text/plain; charset=utf-8"), ]) return [b"data"] h = TestHandler() h.run(app) self.assertEqual(b"Status: 200 OK\r\n" b"Content-Type: text/plain; charset=utf-8\r\n" b"Content-Length: 4\r\n" b"\r\n" b"data", h.stdout.getvalue()) def testCloseOnError(self): side_effects = {'close_called': False} MSG = b"Some output has been sent" def error_app(e,s): s("200 OK",[])(MSG) class CrashyIterable(object): def __iter__(self): while True: yield b'blah' raise AssertionError("This should be caught by handler") def close(self): side_effects['close_called'] = True return CrashyIterable() h = ErrorHandler() h.run(error_app) self.assertEqual(side_effects['close_called'], True) def testPartialWrite(self): written = bytearray() class PartialWriter: def write(self, b): partial = b[:7] written.extend(partial) return len(partial) def flush(self): pass environ = {"SERVER_PROTOCOL": "HTTP/1.0"} h = SimpleHandler(BytesIO(), PartialWriter(), sys.stderr, environ) msg = "should not do partial writes" with self.assertWarnsRegex(DeprecationWarning, msg): h.run(hello_app) self.assertEqual(b"HTTP/1.0 200 OK\r\n" b"Content-Type: text/plain\r\n" b"Date: Mon, 05 Jun 2006 18:49:54 GMT\r\n" b"Content-Length: 13\r\n" b"\r\n" b"Hello, world!", written) def testClientConnectionTerminations(self): environ = {"SERVER_PROTOCOL": "HTTP/1.0"} for exception in ( ConnectionAbortedError, BrokenPipeError, ConnectionResetError, ): with self.subTest(exception=exception): class AbortingWriter: def write(self, b): raise exception stderr = StringIO() h = SimpleHandler(BytesIO(), AbortingWriter(), stderr, environ) h.run(hello_app) self.assertFalse(stderr.getvalue()) def testDontResetInternalStateOnException(self): class CustomException(ValueError): pass # We are raising CustomException here to trigger an exception # during the execution of SimpleHandler.finish_response(), so # we can easily test that the internal state of the handler is # preserved in case of an exception. class AbortingWriter: def write(self, b): raise CustomException stderr = StringIO() environ = {"SERVER_PROTOCOL": "HTTP/1.0"} h = SimpleHandler(BytesIO(), AbortingWriter(), stderr, environ) h.run(hello_app) self.assertIn("CustomException", stderr.getvalue()) # Test that the internal state of the handler is preserved. self.assertIsNotNone(h.result) self.assertIsNotNone(h.headers) self.assertIsNotNone(h.status) self.assertIsNotNone(h.environ) if __name__ == "__main__": unittest.main()