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I have a Nginx websocket reverse proxy and I would like to hide a HTTP header from the client request.
proxy_hide_header hides the server response headers and can't be used for hiding client request headers.
I would like to do that because the websocket server behind nginx doesn't work well with the websocket extension "permessage-deflate" so I would like to remove the Sec-WebSocket-Extensions header from client requests.
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By default, nginx does not pass the header fields “Date”, “Server”, “X-Pad”, and “X-Accel-...” from the response of a proxied server to a client.
The proxy_pass setting makes the Nginx reverse proxy setup work. The proxy_pass is configured in the location section of any virtual host configuration file. To set up an Nginx proxy_pass globally, edit the default file in Nginx's sites-available folder.
Nginx is an open source web server that can also serve as a reverse proxy. Apart from being used to host websites, it's also one of the most widely used reverse proxy and load balancing solutions.
To adjust or set headers for proxied connections, use the proxy_set_header directive, followed by the header value. You can find a list of all available Request Headers and their allowed values here . If you want to prevent a header from being passed to the proxied server, set it to an empty string "" .
You can set a header value to void and Nginx will drop it :
proxy_set_header Sec-WebSocket-Extensions "";
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