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httpd websocket error, 'upgrade' token not found in 'Connection' header

I am deploying a Golang(go1.16.7) backend on a Namecheap vps, using Apache(httpd...Server version: Apache/2.4.37 (centos 8)) Eveything works except the websocket connection. The request is made to:

wss://editor.xyzw.com/crownies/ws/upload/file?email=gbenroscience@gmail.com

When I try to access the websocket connection, it gives:

the client is not using the websocket protocol:'upgrade' token not found in 'Connection' header

(I printed this error out in the golang code in production)

The websocket works locally in development, so I know the Golang code works well. I am certain that the issue is somewhere with my vhost configuration in Apache.

Here is my vhost file:

<VirtualHost *:443>
        ServerName editor.xyzw.com
        ServerAlias editor.xyzw.com www.editor.xyzw.com http://www.editor.xyzw.com
        UseCanonicalName Off
        LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\"" combined
        CustomLog /var/log/httpd/editor_access.log combined
        ErrorLog /var/log/httpd/editor_error.log
        DocumentRoot /path/to/my/document/root
    
    SSLEngine on
    
    SSLCertificateFile /opt/ssl/cert.crt
    
    SSLCertificateKeyFile /opt/ssl/cert.key
    
    SSLCACertificateFile /opt/ssl/cert.ca-bundle
    
    
    SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown
    
    
    
    
    RewriteEngine On
    RewriteCond %{HTTP:Connection} Upgrade [NC]
    RewriteCond %{HTTP:Upgrade} websocket [NC]
    RewriteRule ^/ws(.*) ws://localhost:8080/crownies/ws/$1 [P,L]
    
    ProxyRequests off
    <Location />
        ProxyPass http://localhost:8080/
        ProxyPassReverse http://localhost:8080/
    </Location>
    
    
    
    </VirtualHost>

The request headers from Google Chrome:

Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9
Cache-Control: no-cache
Connection: Upgrade
Cookie: user=blah-blah-blah
Host: editor.xyzw.com
Origin: https://editor.xyzw.com
Pragma: no-cache
Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits
Sec-WebSocket-Key: blah-blah-blah==
Sec-WebSocket-Version: 13
Upgrade: websocket
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.55 Safari/537.36

Please what could be the issue with my vhost?

about 4 years ago · Juan Pablo Isaza

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Encuentra empleos remotos

Answer 1 · 2022-07-09T05:43:42.937Z

I think Location takes precedence over rewrites, so when the paths overlap, you have to stick to rewrites. Don't forget to set proper timeouts for the backend too, for example (adjust to your needs):

# Worker Options
<Proxy http://localhost:8080>
    ProxySet keepalive=On smax=1 connectiontimeout=10 retry=10 timeout=30 ttl=15
</Proxy>

<Proxy ws://localhost:8080>
    ProxySet keepalive=On smax=1 connectiontimeout=10 retry=10 timeout=900 ttl=15
</Proxy>

# Rewrites
RewriteEngine On

RewriteCond %{HTTP:Connection} Upgrade   [NC]
RewriteCond %{HTTP:Upgrade}    websocket [NC]
RewriteRule /ws/(.*) ws://localhost:8080/crownies/ws/$1 [P,L]

RewriteRule /(.*) http://localhost:8080/$1 [P,L]
ProxyPassReverse / http://localhost:8080/

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httpd websocket error, 'upgrade' token not found in 'Connection' header

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Encuentra empleos remotos

Andres GPT