Fix + test for error of assuming that sets could be added (arithmetic fail).

eventlet/wsgi.py

@@ -428,6 +428,7 @@ class Server(BaseHTTPServer.HTTPServer):
     def log_message(self, message):
         self.log.write(message + '\n')
 
+ACCEPT_SOCK = set((errno.EPIPE, errno.EBADF))
 
 def server(sock, site, 
            log=None, 
@@ -477,7 +478,7 @@ def server(sock, site,
                 try:
                     client_socket = sock.accept()
                 except socket.error, e:
-                    if getattr(e, 'errno', 0) not in BAD_SOCK + BROKEN_SOCK:
+                    if getattr(e, 'errno', 0) not in ACCEPT_SOCK:
                         raise
                 pool.execute_async(serv.process_request, client_socket)
             except (KeyboardInterrupt, SystemExit):

tests/wsgi_test.py

@@ -1,12 +1,15 @@
 import cgi
+import errno
 import os
 import socket
+import sys
 from tests import skipped, LimitedTestCase
 from unittest import main
 
 from eventlet import api
 from eventlet import util
 from eventlet import greenio
+from eventlet.green import socket as greensocket
 from eventlet import wsgi
 from eventlet import processes
 
@@ -553,6 +556,31 @@ class TestHttpd(LimitedTestCase):
         self.assertEquals(fd.read(7), 'testing')
         fd.close()
 
-        
+    def test_025_accept_errors(self):
+        api.kill(self.killer)
+        listener = greensocket.socket()
+        listener.bind(('localhost', 0))
+        # NOT calling listen, to trigger the error
+        self.port = listener.getsockname()[1]
+        self.killer = api.spawn(
+            wsgi.server,
+            listener,
+            self.site, 
+            max_size=128,
+            log=self.logfile)
+        old_stderr = sys.stderr
+        try:
+            sys.stderr = self.logfile
+            try:
+                api.connect_tcp(('localhost', self.port))
+                self.fail("Didn't expect to connect")
+            except socket.error, exc:
+                self.assertEquals(exc.errno, errno.ECONNREFUSED)
+                
+            self.assert_('Invalid argument' in self.logfile.getvalue(),
+                self.logfile.getvalue())
+        finally:
+            sys.stderr = old_stderr
+                    
 if __name__ == '__main__':
     main()