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Fixed "Address already in use" from liveserver.

Our WSGIServer rewrapped the socket errors from server_bind into
WSGIServerExceptions, which is used later on to provide nicer
error messages in runserver and used by the liveserver to see if
the port is already in use. But wrapping server_bind isn't enough since
it only binds to the socket, socket.listen (which is called from
server_activate) could also raise "Address already in use".

Instead of overriding server_activate too I chose to just catch socket
errors, which seems to make more sense anyways and should be more robust
against changes in wsgiref.
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commit 2ca00faa913754cd5860f6e1f23c8da2529c691a 1 parent bebb449
@apollo13 apollo13 authored
15 django/core/management/commands/
@@ -1,12 +1,13 @@
from optparse import make_option
from datetime import datetime
+import errno
import os
import re
import sys
import socket
from import BaseCommand, CommandError
-from django.core.servers.basehttp import run, WSGIServerException, get_internal_wsgi_application
+from django.core.servers.basehttp import run, get_internal_wsgi_application
from django.utils import autoreload
naiveip_re = re.compile(r"""^(?:
@@ -117,16 +118,16 @@ def inner_run(self, *args, **options):
handler = self.get_handler(*args, **options)
run(self.addr, int(self.port), handler,
ipv6=self.use_ipv6, threading=threading)
- except WSGIServerException as e:
+ except socket.error as e:
# Use helpful error messages instead of ugly tracebacks.
- 13: "You don't have permission to access that port.",
- 98: "That port is already in use.",
- 99: "That IP address can't be assigned-to.",
+ errno.EACCES: "You don't have permission to access that port.",
+ errno.EADDRINUSE: "That port is already in use.",
+ errno.EADDRNOTAVAIL: "That IP address can't be assigned-to.",
- error_text = ERRORS[e.args[0].args[0]]
- except (AttributeError, KeyError):
+ error_text = ERRORS[e.errno]
+ except KeyError:
error_text = str(e)
self.stderr.write("Error: %s" % error_text)
# Need to use an OS exit because sys.exit doesn't work in a thread
9 django/core/servers/
@@ -58,10 +58,6 @@ def get_internal_wsgi_application():
-class WSGIServerException(Exception):
- pass
class ServerHandler(simple_server.ServerHandler, object):
error_status = str("500 INTERNAL SERVER ERROR")
@@ -114,10 +110,7 @@ def __init__(self, *args, **kwargs):
def server_bind(self):
"""Override server_bind to store the server name."""
- try:
- super(WSGIServer, self).server_bind()
- except Exception as e:
- six.reraise(WSGIServerException, WSGIServerException(e), sys.exc_info()[2])
+ super(WSGIServer, self).server_bind()
9 django/test/
@@ -8,6 +8,7 @@
import os
import posixpath
import re
+import socket
import sys
import threading
import unittest
@@ -21,8 +22,7 @@
from import call_command
from import no_style
from import flush
-from django.core.servers.basehttp import (WSGIRequestHandler, WSGIServer,
- WSGIServerException)
+from django.core.servers.basehttp import WSGIRequestHandler, WSGIServer
from django.core.urlresolvers import clear_url_caches, set_urlconf
from django.db import connection, connections, DEFAULT_DB_ALIAS, transaction
from django.db.models.loading import cache
@@ -1028,10 +1028,9 @@ def run(self):
self.httpd = WSGIServer(
(, port), QuietWSGIRequestHandler)
- except WSGIServerException as e:
+ except socket.error as e:
if (index + 1 < len(self.possible_ports) and
- hasattr(e.args[0], 'errno') and
- e.args[0].errno == errno.EADDRINUSE):
+ e.errno == errno.EADDRINUSE):
# This port is already in use, so we go on and try with
# the next one in the list.
4 tests/servers/
@@ -5,10 +5,10 @@
from __future__ import unicode_literals
import os
+import socket
from django.core.exceptions import ImproperlyConfigured
from django.test import LiveServerTestCase
-from django.core.servers.basehttp import WSGIServerException
from django.test.utils import override_settings
from django.utils.http import urlencode
from django.utils.six.moves.urllib.error import HTTPError
@@ -71,7 +71,7 @@ def setUpClass(cls):
cls.raises_exception('localhost', ImproperlyConfigured)
# The host must be valid
- cls.raises_exception('blahblahblah:8081', WSGIServerException)
+ cls.raises_exception('blahblahblah:8081', socket.error)
# The list of ports must be in a valid format
cls.raises_exception('localhost:8081,', ImproperlyConfigured)

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