nginx正常只能代理http请求，如果想实现代理websocket的需求，需在请求中加入"Upgrade"字段，使请求从http升级为websocket。
配置如下：
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http {
map $http_upgrade $connection_upgrade {
default upgrade;
''
close;
}
server {
...
location
/chat/
{
proxy_pass http:
//backend
;
proxy_http_version 1.1;
#以下配置添加代理头部：
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
}
}
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实验案例：
配置websockeet服务器，客户端通过代理连接服务器端。环境如下：
websocket服务端：192.168.1.110:8010
nginx ：192.168.1.131:8081
1：利用nodejs实现一个websocket服务端，监听8010端口，等待websocket链接。
安装nodejs与npm，并安装ws模块。（这里通过官网程序包实现）
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[root@192_168_1_110 ~]
# tar -zxvf node-v6.2.0-linux-x64.tar.gz
[root@192_168_1_110 ~]
# ln -s /root/node-v6.2.0-linux-x64/bin/node /usr/local/bin/node
[root@192_168_1_110 ~]
# ln -s /root/node-v6.2.0-linux-x64/bin/node /usr/local/bin/node
[root@192_168_1_110 ~]
# npm install -g ws
[root@192_168_1_110 ~]
# npm install -g wscat
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编写websocket服务监听程序：
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[root@192_168_1_110 ~]
# vim server.js
console.log(
"Server started"
);
var Msg =
''
;
var WebSocketServer = require(
'ws'
).Server
, wss = new WebSocketServer({port: 8010});
wss.on(
'connection'
,
function
(ws) {
ws.on(
'message'
,
function
(message) {
console.log(
'Received from client: %s'
, message);
ws.send(
'Server received from client: '
+ message);
});
});
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启动websocket服务端：
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[root@192_168_1_110 ~]
# node server.js
Server started
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重新开启一个终端，使用wscat程序测试程序连接：
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[root@192_168_1_110 ~]
# /root/node-v6.2.0-linux-x64/lib/node_modules/wscat/bin/wscat --connect ws://192.168.1.110:8010
connected (press CTRL+C to quit)
> This is a websocket
test
...
< Server received from client: This is a websocket
test
...
>
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查看服务端：
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[root@192_168_1_110 ~]
#node server.js
Server started
Received from client: This is a websocket
test
... ----从客户端接收到的信息
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至此，websocket环境搭建完成。
2：配置nginx，代理110上的websocket链接。
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[root@192_168_1_131 ~]
# vim /opt/conf/nginx/nginx.conf
......
http {
......
map $http_upgrade $connection_upgrade {
default upgrade;
''
close;
}
.......
include vhost/*.conf;
[root@192_168_1_131 ~]
# vim /opt/conf/nginx/vhost/nodejs.conf
upstream nodejs{
server 192.168.1.110:8010;
}
server {
listen 8010;
access_log
/opt/logs/nginx/nodejs
.log main;
location / {
proxy_pass http:
//nodejs
;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
}
}
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重新加载nginx配置：
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[root@192_168_1_131 ~]
# service nginx reload
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这样配置过后，在nginx服务器上访问8010端口的请求，将会全部发送到后端192.168.1.110的8081端口上。
3：验证websocket请求代理：（把ws地址指向192.168.1.131:8010）
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[root@192_168_1_110 ~]
# /root/node-v6.2.0-linux-x64/lib/node_modules/wscat/bin/wscat --connect ws://192.168.1.131:8010
connected (press CTRL+C to quit)
> This is a websocket
test
through nginx proxying...
< Server received from client: This is a websocket
test
through nginx proxying...
>
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查看服务端：
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[root@192_168_1_110 ~]
#node server.js
Server started
Received from client: This is a websocket
test
...
Received from client: This is a websocket
test
through nginx proxying...
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可以看到通过代理，websocket也能正常接收到客户端的请求信息。
本文转自 icenycmh 51CTO博客，原文链接：http://blog.51cto.com/icenycmh/1839566，如需转载请自行联系原作者
