android13/external/libwebsockets/minimal-examples/raw/minimal-raw-fallback-http-server

lws minimal raw fallback http server

This is the same as the minimal http server, with one difference... if you connect to localhost:7681 with something that doesn't send recognizable http, then the connection will be switched to a raw-skt role and bind to a protocol that echoes anything sent back to the sender.

build

 $ cmake . && make

usage

Commandline option	Meaning
-d	Debug verbosity in decimal, eg, -d15
-s	Configure the server for tls / https and LWS_SERVER_OPTION_ALLOW_NON_SSL_ON_SSL_PORT
-h	(needs -s) Configure the vhost also for LWS_SERVER_OPTION_ALLOW_HTTP_ON_HTTPS_LISTENER, allowing http service on tls port (caution... it's insecure then)
-u	(needs -s) Configure the vhost also for LWS_SERVER_OPTION_REDIRECT_HTTP_TO_HTTPS, so the server issues a redirect to https to clients that attempt to connect to a server configured for tls with http.

 $ ./lws-minimal-raw-fallback-http-server
[2018/11/29 14:27:34:3014] USER: LWS minimal raw fallback http server | visit http://localhost:7681
[2018/11/29 14:27:34:3243] NOTICE: Creating Vhost 'default' port 7681, 1 protocols, IPv6 off

Visit http://127.0.0.1:7681

This allows testing of various combinations of special features for unexpected content on an http(s) listening socket.

cmdline args	http://127.0.0.1:7681	https://127.0.0.1:7681	ssh -p7681 127.0.0.1	flags
none	served	no tls	echos hello	LWS_SERVER_OPTION_FALLBACK_TO_APPLY_LISTEN_ACCEPT_CONFIG
-s	echos http GET	served	echos hello	LWS_SERVER_OPTION_FALLBACK_TO_APPLY_LISTEN_ACCEPT_CONFIG, LWS_SERVER_OPTION_ALLOW_NON_SSL_ON_SSL_PORT
-s -h	served	served	echos hello	LWS_SERVER_OPTION_FALLBACK_TO_APPLY_LISTEN_ACCEPT_CONFIG, LWS_SERVER_OPTION_ALLOW_NON_SSL_ON_SSL_PORT, LWS_SERVER_OPTION_ALLOW_HTTP_ON_HTTPS_LISTENER
-s -u	redirected to https	served	echos hello	LWS_SERVER_OPTION_FALLBACK_TO_APPLY_LISTEN_ACCEPT_CONFIG, LWS_SERVER_OPTION_ALLOW_NON_SSL_ON_SSL_PORT, LWS_SERVER_OPTION_REDIRECT_HTTP_TO_HTTPS