Re: Web sockets & proxypass - No protocol handler was valid for the URL

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Hi Yann thanks again for all your help.

I am still trying to work out why the client isn't receiving the Upgrade header in the response.
I see a proxy debug log:

[Thu Jan 05 11:04:24.002173 2017] [proxy:debug] [pid 65956] proxy_util.c(3754): (54)Connection reset by peer: [client 127.0.0.1:51776] AH03308: ap_proxy_transfer_between_connections: error on sock - ap_get_brigade

[Thu Jan 05 11:04:24.002356 2017] [proxy:debug] [pid 65956] proxy_util.c(2169): AH00943: WS: has released connection for (alfred.local)

[Thu Jan 05 11:04:28.001195 2017] [proxy:debug] [pid 65946] proxy_util.c(3754): (54)Connection reset by peer: [client 127.0.0.1:51780] AH03308: ap_proxy_transfer_between_connections: error on sock - ap_get_brigade

[Thu Jan 05 11:04:28.001369 2017] [proxy:debug] [pid 65946] proxy_util.c(2169): AH00943: WS: has released connection for (alfred.local)


Any idea what that might be about and if it is related?


2017-01-05 6:55 GMT-03:00 Yann Ylavic <ylavic.dev@xxxxxxxxx>:
On Thu, Jan 5, 2017 at 10:36 AM, Yann Ylavic <ylavic.dev@xxxxxxxxx> wrote:
>
> For the record (after private discussion with Adam), it seems that a
> configuration like the below would work for http(s) and ws(s) on the
> same URL:
>
>   RewriteEngine on
>   RewriteCond %{HTTP:Upgrade} "(?i)websocket"
>   RewriteRule ^/(.*)$ wss://backend/$1 [P]
>   ProxyPass / https://backend/

*But* note that having both HTTP(s) and WS(s) on the same URL it is
*not* recommended, mainly for security reasons.

While mod_proxy_http is a strict HTTP protocol validator,
mod_proxy_wstunnel is only a tunnel (a TCP proxy) once the upgrade is
asked by the client/browser).

So with the above configuration a simple Upgrade header in the request
would open a tunnel with backend, including for "normal" HTTP traffic.

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