Nodejs websocket 502 bad gateway

Server NGINX
1

I’m trying to make work nginx 1.4.7 with nodejs websockets
but I’m getting 502 bad gateway

NGINX Error:
[error] 2394#0: *1 upstream prematurely closed connection while reading
response header from upstream, client: 127.0.0.1, server: xxx.cz,
request:
“GET / HTTP/1.1”, upstream: “http://127.0.0.1:8090/”, host: “xxx.cz”

my conf:
upstream xxx {
server 127.0.0.1:8090;
}

the nginx server instance

server {
listen 8085;
server_name xxx.cz xxx;
ssl on;
#ssl_certificate /etc/ssl/xxx/xxx.cz.pem;
ssl_certificate /etc/ssl/xxx/xxx.cz.crt;
ssl_certificate_key /etc/ssl/xxx/xxx.cz.key;

access_log /var/log/nginx/xxx.log;

# pass the request two the node.js server with the correct headers

and
much more can be added, see nginx config options
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy true;

  #WEBSOCKET
  proxy_http_version 1.1;
  proxy_set_header Upgrade $http_upgrade;
  proxy_set_header Connection "upgrade";

  proxy_pass http://xxx;
  proxy_redirect off;
}

}

THIS IS CURL cmd what I’m using
If I use curl directly without nginx it’s working fine.
curl -i -N -vv -H “Connection: Upgrade” -H “Upgrade: websocket” -H
“Host:
xxx.cz” -H “Origin: https://xxx.cz” -k https://127.0.0.1:8085

RESULT:

  • About to connect() to 127.0.0.1 port 8085 (#0)
  • Trying 127.0.0.1… connected
  • successfully set certificate verify locations:
  • CAfile: none
    CApath: /etc/ssl/certs
  • SSLv3, TLS handshake, Client hello (1):
  • SSLv3, TLS handshake, Server hello (2):
  • SSLv3, TLS handshake, CERT (11):
  • SSLv3, TLS handshake, Server key exchange (12):
  • SSLv3, TLS handshake, Server finished (14):
  • SSLv3, TLS handshake, Client key exchange (16):
  • SSLv3, TLS change cipher, Client hello (1):
  • SSLv3, TLS handshake, Finished (20):
  • SSLv3, TLS change cipher, Client hello (1):
  • SSLv3, TLS handshake, Finished (20):
  • SSL connection using ECDHE-RSA-AES256-SHA
  • Server certificate:
  •    subject: serialNumber=aCFUcgALEf6y9h5BHsbSHjMYomt-k6ZQ;

OU=GT30082937; OU=See Upgrade your TLS/SSL & Wildcard Certificates to GeoTrust | RapidSSL (c)13; OU=Domain
Control Validated - RapidSSL(R); CN=xxx.cz

  •    start date: 2013-09-30 06:29:47 GMT

  •    expire date: 2014-10-03 05:32:07 GMT

  •    issuer: C=US; O=GeoTrust, Inc.; CN=RapidSSL CA

  •    SSL certificate verify result: unable to get local issuer

certificate (20), continuing anyway.

GET / HTTP/1.1
User-Agent: curl/7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1
zlib/1.2.3.4 libidn/1.23 librtmp/2.3
Accept: /
Connection: Upgrade
Upgrade: websocket
Host: xxx.cz
Origin: https://xxx.cz

< HTTP/1.1 502 Bad Gateway
HTTP/1.1 502 Bad Gateway
< Server: nginx/1.4.7
Server: nginx/1.4.7
< Date: Mon, 07 Apr 2014 11:19:01 GMT
Date: Mon, 07 Apr 2014 11:19:01 GMT
< Content-Type: text/html
Content-Type: text/html
< Content-Length: 172
Content-Length: 172
< Connection: keep-alive
Connection: keep-alive

<

502 Bad Gateway

502 Bad Gateway

nginx/1.4.7 * Connection #0 to host 127.0.0.1 left intact * Closing connection #0 * SSLv3, TLS alert, Client hello (1):

Posted at Nginx Forum:

2

Hello!

On Mon, Apr 07, 2014 at 07:38:00AM -0400, zajca wrote:

I’m trying to make work nginx 1.4.7 with nodejs websockets
but I’m getting 502 bad gateway

NGINX Error:
[error] 2394#0: *1 upstream prematurely closed connection while reading
response header from upstream, client: 127.0.0.1, server: xxx.cz, request:
“GET / HTTP/1.1”, upstream: “http://127.0.0.1:8090/”, host: “xxx.cz”

As per the error message, you backend closes connection for some
reason, instead of returning proper 101 Switching Protocols
response. You may want to look into your backend to find out why
it does so.

–
Maxim D.
http://nginx.org/

3

Solved:
It was my bad I had domain without ssl binded to same port as this one
with
ssl. So it wasn’t working.

Posted at Nginx Forum: