pywsgi: fix logging when bound on unix socket

Thanks to Chris Meyers (#295), Eugene Pankov (#300).

Added examples: unixsocket_server.py and unixsocket_client.py that help reproduce the issue.

examples/unixsocket_client.py

+import socket
+
+s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+s.connect("./unixsocket_server.py.sock")
+s.send('GET / HTTP/1.0\r\n\r\n')
+data = s.recv(1024)
+print 'received %s bytes' % len(data)
+print data
+s.close()

examples/unixsocket_server.py

+import os
+from gevent.pywsgi import WSGIServer
+from gevent import socket
+
+
+def application(environ, start_response):
+    start_response('200 OK', [])
+    return []
+
+
+if __name__ == '__main__':
+    listener = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+    sockname = './' + os.path.basename(__file__) + '.sock'
+    if os.path.exists(sockname):
+        os.remove(sockname)
+    listener.bind(sockname)
+    listener.listen(1)
+    WSGIServer(listener, application).serve_forever()

gevent/pywsgi.py

@@ -466,8 +466,9 @@ class WSGIHandler(object):
             delta = '%.6f' % (self.time_finish - self.time_start)
         else:
             delta = '-'
+        client_address = self.client_address[0] if isinstance(self.client_address, tuple) else self.client_address
         return '%s - - [%s] "%s" %s %s %s' % (
-            self.client_address[0],
+            client_address or '-',
             now,
             self.requestline,
             (getattr(self, 'status', None) or '000').split()[0],

greentest/test__examples.py

@@ -6,7 +6,7 @@ import util
 
 
 cwd = '../examples/'
-ignore = ['wsgiserver.py', 'wsgiserver_ssl.py', 'webproxy.py', 'webpy.py']
+ignore = ['wsgiserver.py', 'wsgiserver_ssl.py', 'webproxy.py', 'webpy.py', 'unixsocket_server.py', 'unixsocket_client.py']
 if sys.platform == 'win32':
     ignore += ['geventsendfile.py', 'psycopg2_pool.py']
 ignore += [x[14:] for x in glob.glob('test__example_*.py')]