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from __future__ import print_function
import sys, time, random, urllib, os, json
from subprocess import Popen, PIPE
from twisted.web.server import Site, NOT_DONE_YET
from twisted.web.resource import Resource
from twisted.internet import reactor, defer, ssl
from scrapy import twisted_version
if twisted_version < (11, 0, 0):
def deferLater(clock, delay, func, *args, **kw):
def _cancel_method():
_cancel_cb(None)
d.errback(Exception())
def _cancel_cb(result):
if cl.active():
cl.cancel()
return result
d = defer.Deferred()
d.cancel = _cancel_method
d.addCallback(lambda ignored: func(*args, **kw))
d.addBoth(_cancel_cb)
cl = clock.callLater(delay, d.callback, None)
return d
else:
from twisted.internet.task import deferLater
def getarg(request, name, default=None, type=str):
if name in request.args:
return type(request.args[name][0])
else:
return default
class LeafResource(Resource):
isLeaf = True
def deferRequest(self, request, delay, f, *a, **kw):
def _cancelrequest(_):
# silence CancelledError
d.addErrback(lambda _: None)
d.cancel()
d = deferLater(reactor, delay, f, *a, **kw)
request.notifyFinish().addErrback(_cancelrequest)
return d
class Follow(LeafResource):
def render(self, request):
total = getarg(request, "total", 100, type=int)
show = getarg(request, "show", 1, type=int)
order = getarg(request, "order", "desc")
maxlatency = getarg(request, "maxlatency", 0, type=float)
n = getarg(request, "n", total, type=int)
if order == "rand":
nlist = [random.randint(1, total) for _ in range(show)]
else: # order == "desc"
nlist = range(n, max(n - show, 0), -1)
lag = random.random() * maxlatency
self.deferRequest(request, lag, self.renderRequest, request, nlist)
return NOT_DONE_YET
def renderRequest(self, request, nlist):
s = """<html> <head></head> <body>"""
args = request.args.copy()
for nl in nlist:
args["n"] = [str(nl)]
argstr = urllib.urlencode(args, doseq=True)
s += "<a href='/follow?%s'>follow %d</a><br>" % (argstr, nl)
s += """</body>"""
request.write(s)
request.finish()
class Delay(LeafResource):
def render_GET(self, request):
n = getarg(request, "n", 1, type=float)
b = getarg(request, "b", 1, type=int)
if b:
# send headers now and delay body
request.write('')
self.deferRequest(request, n, self._delayedRender, request, n)
return NOT_DONE_YET
def _delayedRender(self, request, n):
request.write("Response delayed for %0.3f seconds\n" % n)
request.finish()
class Status(LeafResource):
def render_GET(self, request):
n = getarg(request, "n", 200, type=int)
request.setResponseCode(n)
return ""
class Raw(LeafResource):
def render_GET(self, request):
request.startedWriting = 1
self.deferRequest(request, 0, self._delayedRender, request)
return NOT_DONE_YET
render_POST = render_GET
def _delayedRender(self, request):
raw = getarg(request, 'raw', 'HTTP 1.1 200 OK\n')
request.startedWriting = 1
request.write(raw)
request.channel.transport.loseConnection()
request.finish()
class Echo(LeafResource):
def render_GET(self, request):
output = {
'headers': dict(request.requestHeaders.getAllRawHeaders()),
'body': request.content.read(),
}
return json.dumps(output)
class Partial(LeafResource):
def render_GET(self, request):
request.setHeader("Content-Length", "1024")
self.deferRequest(request, 0, self._delayedRender, request)
return NOT_DONE_YET
def _delayedRender(self, request):
request.write("partial content\n")
request.finish()
class Drop(Partial):
def _delayedRender(self, request):
abort = getarg(request, "abort", 0, type=int)
request.write("this connection will be dropped\n")
tr = request.channel.transport
try:
if abort and hasattr(tr, 'abortConnection'):
tr.abortConnection()
else:
tr.loseConnection()
finally:
request.finish()
class Root(Resource):
def __init__(self):
Resource.__init__(self)
self.putChild("status", Status())
self.putChild("follow", Follow())
self.putChild("delay", Delay())
self.putChild("partial", Partial())
self.putChild("drop", Drop())
self.putChild("raw", Raw())
self.putChild("echo", Echo())
def getChild(self, name, request):
return self
def render(self, request):
return 'Scrapy mock HTTP server\n'
class MockServer():
def __enter__(self):
from scrapy.utils.test import get_testenv
self.proc = Popen([sys.executable, '-u', '-m', 'scrapy.tests.mockserver'],
stdout=PIPE, env=get_testenv())
self.proc.stdout.readline()
def __exit__(self, exc_type, exc_value, traceback):
self.proc.kill()
self.proc.wait()
time.sleep(0.2)
if __name__ == "__main__":
root = Root()
factory = Site(root)
httpPort = reactor.listenTCP(8998, factory)
contextFactory = ssl.DefaultOpenSSLContextFactory(
os.path.join(os.path.dirname(__file__), 'keys/cert.pem'),
os.path.join(os.path.dirname(__file__), 'keys/cert.pem'),
)
httpsPort = reactor.listenSSL(8999, factory, contextFactory)
def print_listening():
httpHost = httpPort.getHost()
httpsHost = httpsPort.getHost()
print("Mock server running at http://%s:%d and https://%s:%d" % (
httpHost.host, httpHost.port, httpsHost.host, httpsHost.port))
reactor.callWhenRunning(print_listening)
reactor.run()
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