如何为服务器发送的事件关闭Nginx服务器上的缓冲

如何为服务器发送的事件关闭Nginx服务器上的缓冲,nginx,nginx-reverse-proxy,nginx-config,Nginx,Nginx Reverse Proxy,Nginx Config,问题:Nginx服务器正在缓冲服务器发送的事件(SSE) 设置:节点v12.13.1,Nginx 1.16.1,Chrome v80 情景: 我试着用proxy\u buffering关闭来关闭缓冲甚至在服务器响应头中添加了“X-Accel-Buffering”:“no”,但nginx仍在缓冲所有SSE。如果我关闭节点服务器或重新启动nginx服务器,那么所有SSE消息都会批量发送到客户端。我试了很多,但不知道我失踪了 Nginx配置文件: events { worker_connec

问题:Nginx服务器正在缓冲服务器发送的事件(SSE)

设置:节点v12.13.1,Nginx 1.16.1,Chrome v80

情景: 我试着用
proxy\u buffering关闭来关闭缓冲
甚至在服务器响应头中添加了
“X-Accel-Buffering”:“no”
,但nginx仍在缓冲所有SSE。如果我关闭节点服务器或重新启动nginx服务器,那么所有SSE消息都会批量发送到客户端。我试了很多,但不知道我失踪了

Nginx配置文件:


events {
    worker_connections  1024;
}

http {
    include       mime.types;
    sendfile        on;   
    keepalive_timeout  65;

    server {
        listen       4200;
        server_name  localhost;

        location / {    
            proxy_set_header Connection '';
            proxy_http_version 1.1;
            chunked_transfer_encoding off;
            proxy_buffering off;
            proxy_cache off;
            proxy_pass http://localhost:8700;
        }
    }
}
节点服务器:

var express = require('express');
var app = express();

var template = 
`<!DOCTYPE html> <html> <body>
    <script type="text/javascript">
        var source = new EventSource("/events/");
        source.onmessage = function(e) {
            document.body.innerHTML += e.data + "<br>";
        };
    </script>
</body> </html>`;

app.get('/', function (req, res) {
    res.send(template); // <- Return the static template above
});

var clientId = 0;
var clients = {}; // <- Keep a map of attached clients

// Called once for each new client. Note, this response is left open!
app.get('/events/', function (req, res) {
    req.socket.setTimeout(Number.MAX_VALUE);
    res.writeHead(200, {
        'Content-Type': 'text/event-stream', // <- Important headers
        'Cache-Control': 'no-cache',
        'Connection': 'keep-alive',
        'X-Accel-Buffering': 'no'
    });
    res.write('\n');
    (function (clientId) {
        clients[clientId] = res; // <- Add this client to those we consider "attached"
        req.on("close", function () {
            delete clients[clientId]
        }); // <- Remove this client when he disconnects
    })(++clientId)
});

setInterval(function () {
    var msg = Math.random();
    console.log("Clients: " + Object.keys(clients) + " <- " + msg);
    for (clientId in clients) {
        clients[clientId].write("data: " + msg + "\n\n"); // <- Push a message to a single attached client
    };
}, 2000);

app.listen(process.env.PORT || 8700);
var express=require('express');
var-app=express();
变量模板=
`  
var source=new EventSource(“/events/”);
source.onmessage=函数(e){
document.body.innerHTML+=e.data+“
”; }; `; app.get('/',函数(req,res){ res.send(模板);//另请参见