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annotate test/wsgi_liveserver.py @ 6747:d32d43e4a5ba

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wsgi can cache tracker instance enabled by feature flag. Patch by Marcus Priesch caches a loaded tracker instance and reuse it for future client sessions. It is enabled by a feature flag in wsgi.py since it arrived during the 2.2.0 beta period. The provided wsgi.py is modified to enable it. Testing is run with flag enabled and disabled. Ralf Schlatterbeck and Marcus tested it on one of their larger more complex trackers and it sped up the response time to a client request by a factor of 3 (270ms down to about 80-85ms).
author John Rouillard <rouilj@ieee.org>
date Sat, 02 Jul 2022 14:04:00 -0400
parents e9760702bf0c
children f6923d2ba9a5
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1 # -*- coding: utf-8 -*-
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2 """
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3 wsgi-liveserver provides a simple LiverServerTestCase class that can be used to
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4 help start a web server in the background to serve a WSGI compliant application
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5 for use with testing. Generally it will be used in conjuction with something
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6 like Selenium to perform a series of functional tests using a browser.
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7
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8 Licensed under the GNU GPL v3
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9
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10 Copyright (c) 2013 John Kristensen (unless explicitly stated otherwise).
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11 """
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12 import threading
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13 import socket
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14 import unittest
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15 from wsgiref.simple_server import make_server, WSGIRequestHandler
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16
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17 __author__ = 'John Kristensen'
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18 __version__ = '0.3.1'
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19 __license__ = 'GPLv3'
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20
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21
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22 class QuietHandler(WSGIRequestHandler):
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23 def log_request(*args, **kwargs):
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24 pass
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25
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26
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27 class LiveServerTestCase(unittest.TestCase):
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28
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29 port_range = (8080, 8090)
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30
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31 def create_app(self):
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32 """Create your wsgi app and return it."""
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33 raise NotImplementedError
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34
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35 def __call__(self, result=None):
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36 """
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37 Do some custom setup stuff and then hand off to TestCase to do its
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38 thing.
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39 """
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40 try:
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41 self._pre_setup()
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42 super(LiveServerTestCase, self).__call__(result)
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43 finally:
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44 self._post_teardown()
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45
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46 def url_base(self):
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47 """Return the url of the test server."""
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48 return 'http://{0}:{1}'.format(self.host, self.port)
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49
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50 def _pre_setup(self):
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51 """Setup and start the test server in the background."""
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52 self._server = None
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53
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54 self.host = 'localhost'
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55 self.port = self.port_range[0]
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56 self._thread = None
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57
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58 # Get the app
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59 self.app = self.create_app()
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60
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61 # Cycle through the port range to find a free port
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62 while self._server is None and self.port <= self.port_range[1]:
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63 try:
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64 self._server = make_server(self.host, self.port, self.app,
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65 handler_class=QuietHandler)
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66 except socket.error:
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67 self.port += 1
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68
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69 # No free port, raise an exception
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70 if self._server is None:
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71 raise socket.error('Ports {0}-{1} are all already in use'.format(
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72 *self.port_range))
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73
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74 # Start the test server in the background
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75 self._thread = threading.Thread(target=self._server.serve_forever)
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76 self._thread.start()
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77
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78 def _post_teardown(self):
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79 """Stop the test server."""
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80 if self._thread is not None:
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81 self._server.shutdown()
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82 self._server.server_close()
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83 self._thread.join()
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84 del self._server
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