对于 Django 频道,我有这样的消费者文件:
from channels.generic.websocket import WebsocketConsumer
from asgiref.sync import async_to_sync
import json
class chatConsumer(WebsocketConsumer):
def connect(self):
async_to_sync(self.channel_layer.group_add)(
'my_socket',
self.channel_name
)
self.accept()
def receive(self, text_data):
async_to_sync(self.channel_layer.group_send)(
'my_socket',
{
'type': 'chat_message',
'data': text_data
}
)
def chat_message(self, event):
json_data = json.loads(event['data']) # get received data as json
respons_test = json.dumps(json_data) # make response text
print("chat_message") # Sometimes this is printed few times
self.send(text_data=respons_test)
似乎 chat_message
方法有时会运行几次。我不确定这究竟是如何工作的,但是当我打印到 chat_message
时,它有时会打印一次,有时会不止一次。 (我不改变客户端/浏览器的数量,而且在前端,接收者正确地收到消息,只有一次)。
问题:chat_message
正常运行几次?还是我的代码有问题?
答案 0 :(得分:0)
import json
from asgiref.sync import async_to_sync
from channels.generic.websocket import WebsocketConsumer
class ChatConsumer(WebsocketConsumer):
def connect(self):
self.room_group_name = 'my_socket'
# 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):
text_data_json = json.loads(text_data)
message = text_data_json['message']
# Send message to room group
async_to_sync(self.channel_layer.group_send)(
self.room_group_name,
{
'type': 'chat_message',
'message': message
}
)
# Receive message from room group
def chat_message(self, event):
message = event['message']
# Send message to WebSocket
self.send(text_data=json.dumps({
'message': message
}))
使用上面的代码。
答案 1 :(得分:0)
它会打印多少次连接到组 my_socket
的客户端。群组中的每个成员都会将消息发送到其频道中的 chat_message
处理程序。检查您的浏览器客户端或打印连接方法以查看有多少客户端连接到该组。它应该在 chat_message
处理程序中打印相同数量的消息