You cant do that for a couple of reasons. The first is that Apache/mod_wsgi is often multi process and so your code would get executed in multiple process at same time. Since only one process can acquire listener port, all but that one will fail.
Second, you can not run blocking operations like srv.serve_forever() in global scope of WSGI script file import. You shouldn't even do that specific one in raw request handler either. The only way you could do something like that is to start a separate thread within the process and do it within the thread. That way you will not block the request handler thread. Even if you do the latter, you will still have multi process issue. Only solution to that is use Windows, or if on UNIX use daemon mode and delegate application to run in a single process daemon process group. Graham 2009/12/25 Kaktus621 <[email protected]>: > Hello, > > some days ago i have isntalled the wsgi module into my apache and the > simple Hello, World application runs fine. The next step I did want to > do is to make a TCP server that is listening on a certain port (e.g. > 621). Because of this, I modified the Hello World application to the > following code: > > ###### > > def application(environ, start_response): > status = '200 OK' > output = 'Hello World!' > > response_headers = [('Content-type', 'text/plain'), > ('Content-Length', str(len(output)))] > start_response(status, response_headers) > > return [output] > > from wsgiref.simple_server import make_server > srv = make_server('localhost', 621, application) > srv.serve_forever() > > ###### > > But now the script won't run anymore, here is the error.log of the > apache: > > ###### > > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] mod_wsgi > (pid=5612): Target WSGI script '/var/www/python/test.wsgi' cannot be > loaded as Python module. > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] mod_wsgi > (pid=5612): Exception occurred processing WSGI script '/var/www/python/ > test.wsgi'. > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] Traceback > (most recent call last): > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] File "/var/ > www/python/test.wsgi", line 12, in <module> > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] srv = > make_server('localhost', 621, application) > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] File "/usr/ > lib/python2.6/wsgiref/simple_server.py", line 181, in make_server > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] server = > server_class((host, port), handler_class) > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] File "/usr/ > lib/python2.6/SocketServer.py", line 400, in __init__ > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] > self.server_bind() > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] File "/usr/ > lib/python2.6/wsgiref/simple_server.py", line 50, in server_bind > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] > HTTPServer.server_bind(self) > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] File "/usr/ > lib/python2.6/BaseHTTPServer.py", line 108, in server_bind > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] > SocketServer.TCPServer.server_bind(self) > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] File "/usr/ > lib/python2.6/SocketServer.py", line 411, in server_bind > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] > self.socket.bind(self.server_address) > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] File > "<string>", line 1, in bind > [Thu Dec 24 19:38:19 2009] [error] [client 192.168.178.2] error: > [Errno 13] Permission denied > > ###### > > Do you know why this is happening? Is there another way to create such > a server or to grant the module to create sockets? Thank you in advance > > -- > > You received this message because you are subscribed to the Google Groups > "modwsgi" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/modwsgi?hl=en. > > > -- You received this message because you are subscribed to the Google Groups "modwsgi" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/modwsgi?hl=en.
