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libwebsockets/minimal-examples/ws-server/minimal-ws-server/README.md
Andy Green f6ae0edf8d strict host check vhost flag 
https://github.com/warmcat/libwebsockets/issues/1423

If you vhost->options has the flag LWS_SERVER_OPTION_VHOST_UPG_STRICT_HOST_CHECK,
then if the server is sent an upgrade request, the content of the Host: header is
required to match the vhost name + port.  The port is set to the well-known values
of 80 and 443 if no :port on the host: value, depending on tls or not on the
connection.

minimal-ws-server can now take a -h flag to set this.  lejp-conf (eg, lwsws) can now take
a flag strict-host-check on the vhost to enable it as well.
2018-11-13 09:55:06 +08:00

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lws minimal ws server

build

 $ cmake . && make

Commandline Options

Option Meaning
-d Set logging verbosity
-s Serve using TLS selfsigned cert (ie, connect to it with https://...)
-h Strict Host: header checking against vhost name (localhost) and port

usage

 $ ./lws-minimal-ws-server
[2018/03/04 09:30:02:7986] USER: LWS minimal ws server | visit http://localhost:7681
[2018/03/04 09:30:02:7986] NOTICE: Creating Vhost 'default' port 7681, 1 protocols, IPv6 on

Visit http://localhost:7681 on multiple browser windows

Text you type in any browser window is sent to all of them.

For simplicity of this example, only one line of text is cached at the server.