mongoose/docs/c-api/http.h/mg_set_protocol_http_websocket.md

title	decl_name	symbol_kind	signature
mg_set_protocol_http_websocket()	mg_set_protocol_http_websocket	func	void mg_set_protocol_http_websocket(struct mg_connection *nc);

Attach a built-in HTTP event handler to a given connection. The user-defined event handler will receive the following extra events:

• MG_EV_HTTP_REQUEST: HTTP request has arrived. Parsed HTTP request is passed as struct http_message through the handler's void *ev_data pointer.
• MG_EV_HTTP_MULTIPART_REQUEST: A multipart POST request has been received. This event is sent before the body is parsed. After this the user should expect a sequence of MG_EV_HTTP_PART_BEGIN/DATA/END requests. This is also the last time when headers and other request fields are accessible.
• MG_EV_HTTP_REPLY: HTTP reply has arrived. The parsed HTTP reply is passed as struct http_message through the handler's void *ev_data pointer.
• MG_EV_HTTP_CHUNK: HTTP chunked-encoding chunk has arrived. The parsed HTTP reply is passed as struct http_message through the handler's void *ev_data pointer. http_message::body would contain incomplete, reassembled HTTP body. It will grow with every new chunk arrived and could potentially consume a lot of memory. An event handler may process the body as chunks are coming in, and signal Mongoose to delete processed body by setting MG_F_DELETE_CHUNK in mg_connection::flags. When the last zero chunk is received, Mongoose sends an MG_EV_HTTP_REPLY event with the full reassembled body (if handler did not signal to delete chunks) or with the empty body (if handler did signal to delete chunks).
• MG_EV_WEBSOCKET_HANDSHAKE_REQUEST: server has received WebSocket handshake request. ev_data contains parsed HTTP request.
• MG_EV_WEBSOCKET_HANDSHAKE_DONE: server has completed WebSocket handshake. ev_data is NULL.
• MG_EV_WEBSOCKET_FRAME: new WebSocket frame has arrived. ev_data is struct websocket_message *
• MG_EV_HTTP_PART_BEGIN: new part of multipart message is started. Extra parameters are passed in mg_http_multipart_part
• MG_EV_HTTP_PART_DATA: new portion of data from multiparted message has arrived. No additional headers are available, only data and data size.
• MG_EV_HTTP_PART_END: final boundary received. Marks the end of the multipart message. Note: Mongoose should be compiled with MG_ENABLE_HTTP_STREAMING_MULTIPART to enable MG_EV_HTTP_MULTIPART_REQUEST, MG_EV_HTTP_REQUEST_END, MG_EV_HTTP_REQUEST_CANCEL, MG_EV_HTTP_PART_BEGIN, MG_EV_HTTP_PART_DATA, MG_EV_HTTP_PART_END constants