Try to detect HTTP proxy and warn about it.

swift-bench test results could be altered when using HTTP proxy server.
This patch add warning when HTTP proxy has been detected.

Change-Id: Id818203345914efee37852e96541c259de6ae555

swiftbench/bench.py

@@ -30,7 +30,7 @@ from eventlet.green.httplib import CannotSendRequest
 
 import swiftclient as client
 
-from swiftbench.utils import config_true_value
+from swiftbench.utils import config_true_value, using_http_proxy
 
 try:
     import simplejson as json
@@ -199,6 +199,9 @@ class Bench(object):
         self.auth_version = conf.auth_version
         self.logger.info("Auth version: %s" % self.auth_version)
         if self.use_proxy:
+            if using_http_proxy(self.auth_url):
+                logger.warn("Auth is going through HTTP proxy server. This "
+                            "could affect test result")
             url, token = client.get_auth(self.auth_url, self.user, self.key,
                                          auth_version=self.auth_version)
             self.token = token
@@ -213,6 +216,10 @@ class Bench(object):
             self.url = conf.url
             self.ip, self.port = self.url.split('/')[2].split(':')
 
+        if using_http_proxy(self.url):
+            logger.warn("Communication with Swift server is going through "
+                        "HTTP proxy server. This could affect test result")
+
         self.object_size = int(conf.object_size)
         self.object_sources = conf.object_sources
         self.lower_object_size = int(conf.lower_object_size)

swiftbench/utils.py

@@ -15,6 +15,11 @@
 
 import sys
 from ConfigParser import ConfigParser, RawConfigParser
+try:
+    from urllib import getproxies, proxy_bypass
+except ImportError:
+    from urllib.request import getproxies, proxy_bypass
+from urlparse import urlparse
 
 # Used when reading config values
 TRUE_VALUES = set(('true', '1', 'yes', 'on', 't', 'y'))
@@ -77,3 +82,12 @@ def config_true_value(value):
     """
     return value is True or \
         (isinstance(value, basestring) and value.lower() in TRUE_VALUES)
+
+
+def using_http_proxy(url):
+    """
+    Return True if the url will use HTTP proxy.
+    Returns False otherwise.
+    """
+    up = urlparse(url)
+    return up.scheme.lower() in getproxies() and not proxy_bypass(up.netloc)

tests/test_utils.py

@@ -104,6 +104,21 @@ log_name = %(yarr)s'''
         os.unlink(temppath)
         self.assertRaises(SystemExit, utils.readconf, temppath)
 
+    @mock.patch("swiftbench.utils.getproxies")
+    @mock.patch("swiftbench.utils.proxy_bypass")
+    def test_using_http_proxy(self, mock_proxy_bypass, mock_getproxies):
+        mock_getproxies.return_value = {'http': 'proxy', 'https': 'proxy'}
+
+        def fake_proxy_bypass(url):
+            return url == "localhost"
+        mock_proxy_bypass.side_effect = fake_proxy_bypass
+
+        self.assertTrue(utils.using_http_proxy("http://host1/"))
+        self.assertFalse(utils.using_http_proxy("http://localhost/"))
+        self.assertTrue(utils.using_http_proxy("https://host1/"))
+        self.assertFalse(utils.using_http_proxy("https://localhost/"))
+        self.assertFalse(utils.using_http_proxy("dummy://localhost/"))
+        self.assertFalse(utils.using_http_proxy("dummy://host1/"))
 
 if __name__ == '__main__':
     unittest.main()