我無法在我的Flask web應用程序中建立websocket。由nginx代理的網絡套接字通過HTTPS提供給400(壞請求)
在客戶端,我每秒向服務器發送一個「ping」websocket事件。在瀏覽器控制檯,我看到下面的錯誤每秒
POST https://example.com/socket.io/?EIO=3&transport=polling&t=LOkVYzQ&sid=88b5202cf38f40879ddfc6ce36322233 400 (BAD REQUEST)
GET https://example.com/socket.io/?EIO=3&transport=polling&t=LOkVZLN&sid=5a355bbccb6f4f05bd46379066876955 400 (BAD REQUEST)
WebSocket connection to 'wss://example.com/socket.io/?EIO=3&transport=websocket&sid=5a355bbccb6f4f05bd46379066876955' failed: WebSocket is closed before the connection is established.
我有以下nginx.conf
server {
listen 80;
server_name example.com www.example.com;
return 301 https://$server_name$request_uri;
}
upstream app_server {
# for UNIX domain socket setups
server unix:/pathtowebapp/gunicorn.sock fail_timeout=0;
}
server {
listen 443 ssl;
server_name example.com www.example.com;
keepalive_timeout 5;
ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
charset utf-8;
client_max_body_size 30M;
location/{
try_files $uri @proxy_to_app;
}
location /socket.io {
proxy_pass http://app_server;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Upgrade websocket;
proxy_set_header Connection "upgrade";
proxy_read_timeout 86400;
proxy_buffering off;
proxy_headers_hash_max_size 1024;
}
location /static {
alias /pathtowebapp/webapp/static;
}
location @proxy_to_app {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# enable this if and only if you use HTTPS
proxy_set_header X-Forwarded-Proto https;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header Host $http_host;
# we don't want nginx trying to do something clever with
# redirects, we set the Host: header above already.
proxy_redirect off;
#proxy_buffering off;
proxy_pass http://app_server;
}
}
我一直在尋找所有與前面使用nginx的HTTPS工作的一個的WebSocket的例子gunicorn。
我的網頁加載,雖然websocket連接不成功。
客戶端的WebSocket是使用下面的JavaScript建立:
var socket = io.connect('https://' + document.domain + ':' + location.port + namespace);
這裏是我的gunicorn.conf
import multiprocessing
bind = 'unix:/pathtowebapp/gunicorn.sock'
workers = multiprocessing.cpu_count() * 2 + 1
worker_class = 'eventlet'
[編輯]如果我配置nginx的是在Flask-IO documentation和方式只要運行(env)$ python deploy_app.py
然後它的工作。但我的印象是,這並不像我之前提到的設置那樣生產理想