Django ValueError:找不到路径'ws/chat//'的路由
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【中文标题】Django ValueError:找不到路径\'ws/chat//\'的路由【英文标题】:Django ValueError: No route found for path 'ws/chat//'Django ValueError:找不到路径'ws/chat//'的路由 【发布时间】:2021-06-18 23:08:31 【问题描述】:我正在使用this tutorial from youtube(这里的github链接:LINK)制作一个简单的聊天应用程序。一个潜在的问题是本教程使用 2.x 版本的 django,但我有 3.1.7,但我运行得很好并且很接近,但随后开始出现此错误:
ValueError: No route found for path 'ws/chat//'
查看我的终端时,它不断尝试重新连接,可能是因为我使用的是ReconnectingWebSocket github javascript code。当我运行 redis-cli 并输入“ping”时,我得到“PONG”作为回报,所以我认为它工作正常。
下面是我的代码:
routing.py(我认为这似乎很可能是问题所在)
from django.urls import re_path
from . import consumers
websocket_urlpatterns = [
re_path(r'ws/chat/(?P<room_name>\w+)/$', consumers.ChatConsumer.as_asgi()), #new django
]
wsgi.py:
import os
from django.core.wsgi import get_wsgi_application
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'django_project.settings')
application = get_wsgi_application()
settings.py:
WSGI_APPLICATION = 'django_project.wsgi.application'
ASGI_APPLICATION = 'django_project.asgi.application' # older version of django: 'django_project.routing.application'
# Channels redis config:
CHANNEL_LAYERS =
'default':
'BACKEND': 'channels_redis.core.RedisChannelLayer',
'CONFIG':
"hosts": [('127.0.0.1', 6379)],
,
,
views.py:
聊天/views.py
从 django.shortcuts 导入渲染 导入json 从 django.contrib.auth.decorators 导入 login_required from django.utils.safestring import mark_safe
定义索引(请求): 返回渲染(请求,'chat/index.html')
@login_required 定义房间(请求,房间名称): 返回渲染(请求,'chat/room.html', 'room_name_json':房间名 )
urls.py 从 django.urls 导入路径,包括 从 。导入视图
app_name = 'chat'
urlpatterns = [
path('chat/', views.index, name='index'),
path('chat/<str:room_name>/', views.room, name='room'),
]
room.html:
% load static %
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Chat Room</title>
</head>
<body>
<script src="% static '/reconnecting_websockets.js' %"></script>
<textarea id="chat-log" cols="100" rows="20"></textarea><br>
<input id="chat-message-input" type="text" size="100"><br>
<input id="chat-message-submit" type="button" value="Send">
room_name|json_script:"room-name"
<script>
const roomName = JSON.parse(document.getElementById('room-name').textContent);
const chatSocket = new ReconnectingWebSocket(
'ws://'
+ window.location.host
+ '/ws/chat/'
+ roomName
+ '/'
);
chatSocket.onmessage = function(e)
const data = JSON.parse(e.data);
document.querySelector('#chat-log').value += (data.message + '\n'); //grabbing the textarea with id(#) 'chat-log'
;
chatSocket.onclose = function(e)
console.error('Chat socket closed unexpectedly');
;
document.querySelector('#chat-message-input').focus();
document.querySelector('#chat-message-input').onkeyup = function(e)
if (e.keyCode === 13) // enter, return
document.querySelector('#chat-message-submit').click();
;
document.querySelector('#chat-message-submit').onclick = function(e)
const messageInputDom = document.querySelector('#chat-message-input');
const message = messageInputDom.value;
chatSocket.send(JSON.stringify(
'message': message,
'command': 'fetch_messages'
));
messageInputDom.value = ''; //reset value to empty string
;
</script>
</body>
</html>
consumers.py:
聊天/consumers.py
导入 json 从 asgiref.sync 导入 async_to_sync 从 channels.generic.websocket 导入 WebsocketConsumer 从 .models 导入消息 from django.contrib.auth.models 导入用户
类 ChatConsumer(WebsocketConsumer):
def fetch_messages(self, data):
messages = Message.last_10_messages(self)
content =
'command': 'messages',
'messages': self.messages_to_json(messages)
self.send_message(content)
def new_message(self, data):
author_user = User.objects.filter(username='admin')[0]
message = Message.objects.create(author=author_user, content=data['message'])
content =
'command': 'new_message',
'message': self.message_to_json(message)
return self.send_chat_message(content)
def messages_to_json(self, messages):
result = []
for message in messages:
result.append(self.message_to_json(message))
return result
def message_to_json(self, message):
return
'author': message.author.username,
'content': message.content,
'timestamp': str(message.timestamp)
commands =
'fetch_messages': fetch_messages,
'new_message': new_message
def connect(self):
self.room_name = self.scope['url_route']['kwargs']['room_name']
self.room_group_name = 'chat_%s' % self.room_name
# Join room group
async_to_sync(self.channel_layer.group_add)(
self.room_group_name,
self.channel_name
)
self.accept()
def disconnect(self, close_code):
# Leave room group
async_to_sync(self.channel_layer.group_discard)(
self.room_group_name,
self.channel_name
)
# Receive message from WebSocket
def receive(self, text_data):
data = json.loads(text_data)
self.commands[data['command']](self, data) # either fetch_messages or new_message
def send_chat_message(self, message):
print('in send_chat_message')
async_to_sync(self.channel_layer.group_send)( # Send message to room group
self.room_group_name,
'type': 'chat_message',
'message': message
)
def send_message(self, message):
print('message: ' + str(message))
self.send(text_data=json.dumps(message))
# Receive message from room group
def chat_message(self, event):
message = event['message']
content1 = message['message']
content2 = content1['content']
#self.send(text_data=json.dumps(content2)) # Send message to WebSocket
self.send(text_data=json.dumps(content2)) # Send message to WebSocket
【问题讨论】:
你能在你的 asgi.py 中显示代码吗 @seif 我找到了答案,谢谢 【参考方案1】:解决方案:当我将views.py更改为此时,它起作用了:
@login_required
def room(request, room_name):
print('~~~DEBUG~~~')
return render(request, 'chat/room.html',
'room_name': room_name
【讨论】:
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