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我正在创建一个系统,Twitter Live Streaming API通过给定的关键字获取推文数据的实时流。每当推文发布时,我都希望通过WebSockets(使用Django频道)将新数据发送给所有连接的客户端。这是我目前的程序:使用Django频道向所有连接的客户端发送信息
- Twitter的实时流代码调用consumers.py
initiateHandshake()
功能一旦进入新的数据 - Django的通道发送文本“握手”到所有客户端
- 客户临危握手消息,并发送回复消息
- websocket.recieve函数接收此消息,并根据存储在客户端连接会话中的过滤器信息发回所需的数据(这就是为什么需要握手的原因 - 因为每个客户端都有它的自己的过滤器在其连接会话中)
现在,问题在于initiateHandshake()
中的“握手”消息没有发送。为什么是这样,我该如何解决它?非常感谢!我的代码如下。
的WebSockets运行正常(如果客户端发送一个消息,我可以用reply_channel回复到它 - 所有的作品)
routing.py
from channels.routing import route
from tweetrunner.consumers import *
channel_routing = [
route("websocket.connect", ws_connect),
route("websocket.receive", ws_message),
route("websocket.disconnect", ws_disconnect),
]
consumers.py
# In consumers.py
from channels import Group, Channel
from channels.sessions import channel_session
from .models import InputTweet
from django.shortcuts import render
# Outside world connection
def initiateHandshake():
Group("table").send({"text": "handshake"})
# Connected to websocket.connect
@channel_session
def ws_connect(message):
# Accept connection
message.reply_channel.send({"accept": True})
message.channel_session["sort"] = "none"
# Add to group
Group("table").add(message.reply_channel)
# Connected to websocket.receive
@channel_session
def ws_message(message):
definition = message.content['text'][:1]
if definition == "1":
emotion = message.content['text'][1:]
message.channel_session["sort"] = message.content['text'][1:]
sendback = ""
if emotion == 'none':
given_tweets = InputTweet.objects.all()
given_tweets = given_tweets[(len(given_tweets) - 1250):]
print("before render")
sendback = render(None, 'tweetrunner/get_table_update.html', {'given_tweets': given_tweets})
print("rendered")
else:
given_tweets = InputTweet.objects.filter(emotion__startswith=emotion).order_by('score')
given_tweets = given_tweets[(len(given_tweets) - 1250):]
sendback = render(None, 'tweetrunner/get_table_update.html', {'given_tweets': given_tweets})
print("about to send")
message.reply_channel.send({
"text": sendback.content.decode('utf-8'),
})
print("sent -- END CONNECTION LOGS")
elif definition == "3":
print("Keep alive!")
else:
emotion = message.channel_session["sort"]
sendback = ""
print("entered 2")
if emotion == 'none':
given_tweets = InputTweet.objects.all()
given_tweets = given_tweets[(len(given_tweets) - 1250):]
print("before render")
sendback = render(None, 'tweetrunner/get_table_update.html', {'given_tweets': given_tweets})
print("rendered")
else:
given_tweets = InputTweet.objects.filter(emotion__startswith=emotion).order_by('score')
given_tweets = given_tweets[(len(given_tweets) - 1250):]
sendback = render(None, 'tweetrunner/get_table_update.html', {'given_tweets': given_tweets})
print("about to send")
#content = sendback.read()
message.reply_channel.send({
"text": sendback.content.decode('utf-8'),
})
print("sent -- END CONNECTION LOGS")
# Connected to websocket.disconnect
@channel_session
def ws_disconnect(message):
Group("table").discard(message.reply_channel)
我的代码不在任何django应用程序中,正在像这样初始化django(我可以访问数据库并使用django调用,所以它正在工作):
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "analyticsui.settings")
import django
django.setup()
的JavaScript在客户端:当您使用在存储器通道层
socket = new WebSocket("ws://" + window.location.host + "/");
socket.onmessage = function(e) {
alert("Got message: " + e.data)
if (e.data == "handshake") {
socket.send("2handshake");
alert("sent");
} else {
document.getElementById("tweetTable").innerHTML = e.data;
$('.tooltiphere').tooltip('remove');
$('.tooltiphere').tooltip({delay: 10});
}
}
请您详细说明一下吗?我需要做些什么来解决我的问题? –
已更新。请使用这个链接来设置[Redis channel layer](https://channels.readthedocs.io/en/stable/backends.html#redis) –
它工作正常!非常感谢! –