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✏️ test_wsgiref.py
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from unittest import TestCase from wsgiref.util import setup_testing_defaults from wsgiref.headers import Headers from wsgiref.handlers import BaseHandler, BaseCGIHandler from wsgiref import util from wsgiref.validate import validator from wsgiref.simple_server import WSGIServer, WSGIRequestHandler from wsgiref.simple_server import make_server from StringIO import StringIO from SocketServer import BaseServer import os import re import sys from test import support 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 ["Hello, world!"] def run_amock(app=hello_app, data="GET / HTTP/1.0\n\n"): server = make_server("", 80, app, MockServer, MockHandler) inp, out, err, olderr = StringIO(data), StringIO(), StringIO(), sys.stderr sys.stderr = err 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 2.1/2.2+ iterator with an iterable If running under Python 2.2+, this tests the iterator using iter()/next(), as well as __getitem__. 'make_it' must be a function returning a fresh iterator to be tested (since this may test the iterator twice).""" it = make_it() n = 0 for item in match: if not it[n]==item: raise AssertionError n+=1 try: it[n] except IndexError: pass else: raise AssertionError("Too many items from __getitem__",it) try: iter, StopIteration except NameError: pass else: # Only test iter mode under 2.2+ it = make_it() if not iter(it) is it: raise AssertionError for item in match: if not it.next()==item: raise AssertionError try: it.next() except StopIteration: pass else: raise AssertionError("Too many items from .next()",it) class IntegrationTests(TestCase): def check_hello(self, out, has_length=True): self.assertEqual(out, "HTTP/1.0 200 OK\r\n" "Server: WSGIServer/0.1 Python/"+sys.version.split()[0]+"\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!" ) def test_plain_hello(self): out, err = run_amock() self.check_hello(out) def test_request_length(self): out, err = run_amock(data="GET " + ("x" * 65537) + " HTTP/1.0\n\n") self.assertEqual(out.splitlines()[0], "HTTP/1.0 414 Request-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( "A server error occurred. Please contact the administrator." )) self.assertEqual( err.splitlines()[-2], "AssertionError: Headers (('Content-Type', 'text/plain')) must" " be of type list: <type 'tuple'>" ) 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) 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', StringIO("")), ('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(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.has_key, 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, StringIO(''), StringIO(), 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 overriden # 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 overriden by TestHandler 'HOME': "/override/home", # overriden 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']] def trivial_app2(e,s): s('200 OK',[])(e['wsgi.url_scheme']) return [] 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") h = TestHandler() h.run(trivial_app2) self.assertEqual(h.stdout.getvalue(), "Status: 200 OK\r\n" "\r\n" "http") 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") 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%s" % (h.error_status,len(h.error_body),h.error_body)) self.assertNotEqual(h.stderr.getvalue().find("AssertionError"), -1) def testErrorAfterOutput(self): MSG = "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"+MSG) self.assertNotEqual(h.stderr.getvalue().find("AssertionError"), -1) 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" ) 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(),"") else: self.assertTrue( re.match(stdpat%(version,sw), h.stdout.getvalue()), (stdpat%(version,sw), 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 test_main(): support.run_unittest(__name__) if __name__ == "__main__": test_main()
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