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LibHTTP API Reference – httplib_websocket_write()

httplib_websocket_write( conn, opcode, data, data_len );


Parameter Type Description
conn struct httplib_connection * Connection on which the data must be written
opcode int Opcode
data const char * Data to be written to the client
data_len size_t Length of the data

Return Value

Type Description
int Number of bytes written or an error code


The function httplib_websocket_write() sends data to a websocket client wrapped in a websocket frame. The function issues calls to httplib_lock_connection() and httplib_unlock_connaction() to ensure that the transmission is not interrupted. Data corruption can otherwise happn if the application is proactively communicating and responding to a request simultaneously.

The function is available only when LibHTTP is compiled with the -DUSE_WEBSOCKET option.

The function returns the number of bytes written, 0 when the connection has been closed and -1 if an error occured.

See Also