Python IOError:标头已发送-带有gevent_uwsgi的flask socketio

烧瓶、uwsgi、nginx mongo插座应用

周期性地产生这种错误

 File "/home/username/venv/local/lib/python2.7/site-packages/engineio/server.py", line 277, in handle_request
    start_response(r['status'], r['headers'] + cors_headers)
IOError: headers already sent

File "/home/username/venv/local/lib/python2.7/site-packages/flask_socketio/__init__.py", line 562, in _handle_event
    app = self.server.environ[sid]['flask.app']
KeyError: 'flask.app'

此处的所有配置：

uwsgi.ini

[uwsgi]
module = socket_app:app
chdir = /home/username/app_dir/
virtualenv = /home/usernamevenv/
touch-reload = /home/username/reload.txt
logdate = 1
logto = /home/usernamelogs/socket.log
procname = socket_username
log-maxsize  = 204800
env = LANG=ru_RU.utf8
env = LC_ALL=ru_RU.utf8
env = LC_LANG=ru_RU.utf8

和额外参数：

--http :3456 --gevent 100 --http-websockets

Nginx套接字代理

server {
    listen      80;

    server_name domain;
    charset     utf-8;
    client_max_body_size 5M;   # adjust to taste

    location /socket.io {
        proxy_pass http://upstream_name/socket.io;
        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 Connection "Upgrade";
    }

}

应用程序初始化源：

init.py（在另一个没有套接字的web应用程序中使用）

base_app.py（配置应用程序和postforked数据库连接）

和socket_app.py

from gevent.monkey import patch_all

patch_all()

from init import own_socketio
from init import app
from base_app import make_app

make_app()
own_socketio.init_app(app, async_mode='gevent_uwsgi', message_queue=app.config['SOCKETIO_REDIS_URL'], cookie='session')

if __name__ == '__main__':
    own_socketio.run(app, port=3456)

# coding: utf-8
from __future__ import unicode_literals
from flask import Flask, g
from flask_mongoengine import MongoEngine, MongoEngineSessionInterface
from blueprint.monitor import monitor
from init import oid, app, db
from flask_mongoengine import MongoEngine
from uwsgidecorators import postfork


def make_app():
    app.register_blueprint(monitor)
    app.config.from_pyfile('settings.py')
    #if not UWSGI_ALLOWED:
    #    db.init_app(app)
    oid.init_app(app)
    app.session_interface = MongoEngineSessionInterface(db)
    return app

@postfork
def setup_db():
    db.init_app(app)

from gevent.monkey import patch_all

patch_all()

from init import own_socketio
from init import app
from base_app import make_app

make_app()
own_socketio.init_app(app, async_mode='gevent_uwsgi', message_queue=app.config['SOCKETIO_REDIS_URL'], cookie='session')

if __name__ == '__main__':
    own_socketio.run(app, port=3456)