WebSockets and Apache proxy how to configure mod proxy wstunnel

Question

I have     Apache  v2 4  on port 80 of my server for www domain1 com  with mod proxy and mod proxy wstunnel enabled node js   socket io on port 3001 of the same server    Accessing www domain2 com  with port 80  redirects to 2  thanks to the method described here  I have set this in the Apache configuration    lt VirtualHost   80 gt      ServerName www domain2 com     ProxyPass   http   localhost 3001      ProxyPassReverse   http   localhost 3001      ProxyPass   ws   localhost 3001      ProxyPassReverse   ws   localhost 3001   lt  VirtualHost gt    It works for everything  except the websocket part   ws       are not transmitted like it should by the proxy   When I access the page on www domain2 com  I have   Impossible to connect ws   www domain2 com socket io  EIO 3 amp transport websocket amp sid n30rqg9AEqZIk5c9AABN    Question  How to make Apache proxy the WebSockets as well

User · Answer

May be will be useful  Just all queries send via ws to node   lt VirtualHost   80 gt    ServerName www domain2 com     lt Location     gt      ProxyPass  ws   localhost 3001      lt  Location gt   lt  VirtualHost gt

User · Answer

In addition to the main answer  if you have more than one service on the same server that uses websockets  you might want to do this to separate them  by using a custom path       Node server   var io   require  socket io     path    ws website1    listen server     Client HTML    lt script src   ws website1 socket io js  gt  lt  script gt       lt script gt  var socket   io       path    ws website1            Apache config   RewriteEngine On  RewriteRule   website1      http   localhost 3001 1  P L   RewriteCond   REQUEST URI     ws website1  NC  RewriteCond   QUERY STRING  transport websocket  NC  RewriteRule        ws   localhost 3001 1  P L   RewriteCond   REQUEST URI     ws website1  NC  RewriteRule        http   localhost 3001 1  P L          Note  using the default RewriteCond   REQUEST URI     socket io would not be specific to a website  and websockets requests would be mixed up between different websites

User · Answer

For  polling  transport   Apache side    lt VirtualHost   80 gt      ServerName mysite com     DocumentRoot  my path       ProxyRequests Off       lt Proxy   gt          Order deny allow         Allow from all      lt  Proxy gt       ProxyPass  my-connect-3001 http   127 0 0 1 3001 socket io     ProxyPassReverse  my-connect-3001 http   127 0 0 1 3001 socket io     lt  VirtualHost gt    Client side   var my socket   new io Manager null        host   mysite com       path    my-connect-3001      transports    polling       socket

User · Answer

User this link for perfact solution for ws https   httpd apache org docs 2 4 mod mod proxy wstunnel html  You have to just do below step    Go to  etc apache2 mods-available  Step   1  Enable mode proxy wstunnel load by using below command   a2enmod proxy wstunnel load   Step   2   Go to  etc apache2 sites-available  and add below line in your  conf file inside virtual host  ProxyPass   ws2     ws   localhost 8080    ProxyPass   wss2    wss   localhost 8080     Note   8080 mean your that your tomcat running port because we want to connect ws where our War file putted in tomcat and tomcat serve apache for ws  thank you  My Configuration   ws   localhost ws2 ALLCAD-Unifiedcommunication-1 0 chatserver userid 4  Connected

User · Answer

TODO    Have Apache 2 4 installed  doesn t work with 2 2   a2enmod proxy and a2enmod proxy wstunnel load Do this in the Apache config just add two line in your file where 8080 is your tomcat running port   lt VirtualHost   80 gt  ProxyPass   ws2    ws   localhost 8080    ProxyPass   wss2    wss   localhost 8080     lt  VirtualHost   80 gt

User · Answer

I finally managed to do it  thanks to this topic   TODO   1  Have Apache 2 4 installed  doesn t work with 2 2   and do   a2enmod proxy a2enmod proxy http a2enmod proxy wstunnel   2  Have nodejs running on port 3001  3  Do this in the Apache config   lt VirtualHost   80 gt    ServerName www domain2 com    RewriteEngine On   RewriteCond   REQUEST URI     socket io             NC    RewriteCond   QUERY STRING  transport websocket     NC    RewriteRule                 ws   localhost 3001  1  P L     ProxyPass   http   localhost 3001    ProxyPassReverse   http   localhost 3001   lt  VirtualHost gt      Note  if you have more than one service on the same server that uses websockets  you might want to do this to separate them

User · Answer

Did the following for a spring application running static  rest and websocket content   The Apache is used as Proxy and SSL Endpoint for the following URIs     app  rarr  static content    api  rarr  REST API  api ws  rarr  websocket   Apache configuration   lt VirtualHost   80 gt      ServerName xxx xxx xxx          ProxyRequests Off     ProxyVia Off     ProxyPreserveHost On       lt Proxy   gt           Require all granted      lt  Proxy gt       RewriteEngine On        websocket      RewriteCond   HTTP Upgrade           websocket                       NC      RewriteRule   api ws                ws   localhost 8080 api ws  1    P L         rest     ProxyPass  api http   localhost 8080 api     ProxyPassReverse  api http   localhost 8080 api        static content         ProxyPass  app http   localhost 8080 app     ProxyPassReverse  app http   localhost 8080 app   lt  VirtualHost gt    I use the same vHost config for the SSL configuration  no need to change anything proxy related   Spring configuration  server use-forward-headers  true

User · Answer

Instead of filtering by URL  you can also filter by HTTP header  This configuration will work for any web applications that use websockets  also if they are not using socket io    lt VirtualHost   80 gt    ServerName www domain2 com    RewriteEngine On   RewriteCond   HTTP Upgrade   websocket  NC    RewriteRule                 ws   localhost 3001  1  P L    RewriteCond   HTTP Upgrade    websocket  NC    RewriteRule                 http   localhost 3001  1  P L     ProxyPassReverse   http   localhost 3001   lt  VirtualHost gt

User · Answer

My setup    Apache 2 4 10  running off Debian  Node js  version 4 1 1  App running on port 3000 that accepts WebSockets at path  api ws   As mentioned above by  Basj  make sure a2enmod proxy and ws tunnel are enabled   This is a screenshot of the Apache config file that solved my problem     The relevant part as text    lt VirtualHost   80 gt    ServerName           ServerAlias           ProxyPass   http   localhost 3000    ProxyPassReverse   http   localhost 3000      lt Location   api ws  gt        ProxyPass  ws   localhost 3000 api ws     lt  Location gt   lt  VirtualHost gt    Hope that helps

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As of Socket IO 1 0  May 2014   all connections begin with an HTTP polling request  more info here   That means that in addition to forwarding WebSocket traffic  you need to forward any transport polling HTTP requests   The solution below should redirect all socket traffic correctly  without redirecting any other traffic    Enable the following Apache2 mods   sudo a2enmod proxy rewrite proxy http proxy wstunnel  Use these settings in your   conf file  e g   etc apache2 sites-available mysite com conf   I ve included comments to explain each piece    lt VirtualHost   80 gt      ServerName www mydomain com        Enable the rewrite engine       Requires  sudo a2enmod proxy rewrite proxy http proxy wstunnel       In the rules conds   NC  means case-insensitve   P  means proxy     RewriteEngine On        socket io 1 0  starts all connections with an HTTP polling request     RewriteCond   QUERY STRING  transport polling        NC      RewriteRule                 http   localhost 3001  1  P         When socket io wants to initiate a WebSocket connection  it sends an        upgrade  websocket  request that should be transferred to ws        RewriteCond   HTTP Upgrade  websocket                NC      RewriteRule                 ws   localhost 3001  1   P         OPTIONAL  Route all HTTP traffic at  node to port 3001     ProxyRequests Off     ProxyPass            node   http   localhost 3001     ProxyPassReverse     node   http   localhost 3001  lt  VirtualHost gt   I ve included an extra section for routing  node traffic that I find handy  see here for more info

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With help from these answers  I finally got reverse proxy for Node-RED running on a Raspberry Pi with Ubuntu Mate and Apache2 working  using this Apache2 site config    lt VirtualHost   80 gt      ServerName nodered domain com     RewriteEngine On     RewriteCond   HTTP Upgrade   websocket  NC      RewriteRule                 ws   localhost 1880  1  P L      RewriteCond   HTTP Upgrade    websocket  NC      RewriteRule                 http   localhost 1880  1  P L   lt  VirtualHost gt    I also had to enable modules like this   sudo a2enmod proxy sudo a2enmod proxy http sudo a2enmod proxy wstunnel

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For me it works after adding only one line in httpd conf as below  bold line      lt VirtualHost   80 gt      ServerName  xxxxx       ProxyPassReverse is not needed     ProxyPass  log4j ws   localhost 4711 logs  lt VirtualHost   80 gt    Apache version is 2 4 6 on CentOS

[node.js] WebSockets and Apache proxy : how to configure mod_proxy_wstunnel?

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