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Philip Rideout 6d74d31ecd Add civetweb to third_party (MIT).

This is a dependency of our upcoming web-based material debugger. This
CL also includes `tnt/CMakeLists.txt`, which builds a static lib in a
minimal configuration that enables WebSocket support. The entire library
is built from only 4 files:

    ${PUBLIC_HDR_DIR}/CivetServer.h
    ${PUBLIC_HDR_DIR}/civetweb.h
    ${SRC_DIR}/civetweb.c
    ${SRC_DIR}/CivetServer.cpp

2019-08-21 17:45:37 -07:00

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Civetweb API Reference

`mg_set_websocket_handler( ctx, uri, connect_handler, ready_handler, data_handler, close_handler, cbdata );`

Parameters

Parameter	Type	Description
`ctx`	`mg_context *`	The context in which to add the handlers
`uri`	`const char *`	The URI for which the handlers should be activated
`connect_handler`	`mg_websocket_connect_handler`	Handler called when a connect is signalled
`ready_handler`	`mg_websocket_ready_handler`	Handler called when the connection is ready
`data_handler`	`mg_websocket_data_handler`	Handler called when data is received
`close_handler`	`mg_websocket_close_handler`	Handler called when the connection closes
`cbdata`	`void *`	User defined data

int mg_websocket_connect_handler( const struct mg_connection *conn, void *cbdata ); int mg_websocket_ready_handler( struct mg_connection *conn, void *cbdata ); int mg_websocket_data_handler( struct mg_connection *conn, int opcode, char * buf, size_t buf_len, void *cbdata ); int mg_websocket_close_handler( const struct mg_connection *conn, void *cbdata );

Return Value

none

Description

The function mg_set_websocket_handler() connects callback functions to a websocket URI. The callback functions are called when a state change is detected on the URI like an incoming connection or data received from a remote peer.

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