webs

a simple websocket server library.

Compilation

$ cc -o my_server webs.c my_server.c -lpthread
$ ./my_server

Events

Event	Description
on_open	called when a client connects to a server
on_close	called when a client disconnects from a server
on_data	called when data is recieved from a client
on_error	called when an error occurs
on_pong	called when a server recieves a pong
on_ping	called when a client pings a server

Handlers

on_open, on_close, on_ping, on_pong

Format

int my_func(webs_client* self);

Parameter	Description
self	client that triggered the event

on_data

Format

int my_func(webs_client* self, char* data, size_t length);

Parameter	Description
self	client that triggered the event
data	pointer to recieved data
length	number of bytes recieved

NOTE: data is freed when the function returns, doing so yourself is ill-advised.

on_error

Format

int my_func(webs_client* self, enum webs_error code);

Parameter	Description
self	client that triggered the event
code	error code

Possible value for code are,

WEBS_ERR_NONE,                     /* no error */
WEBS_ERR_READ_FAILED,              /* failed to read data */
WEBS_ERR_UNEXPECTED_CONTINUTATION, /* recieved frame marked as continuation with
				    *   no apparent start frame recieved */
WEBS_ERR_NO_SUPPORT,               /* frame uses reserved opcode, no support */
WEBS_ERR_OVERFLOW                  /* frame attempted to contain more than SSIZE_MAX
                                    *   bytes of data */

Sending Data

Strings

Format

webs_send(self, string)

Parameter	Description
self	client to send data to
string	null-terminated string

Other

Format

webs_sendn(self, data, length)

Parameter	Description
self	client to send data to
data	pointer to data that is to be sent
length	number of bytes to be sent

Shutting Down

Disconnecting a Client

Format

webs_eject(self)

Parameter	Description
self	client to be ejected

Stopping a Server

Format

webs_close(server)

Parameter	Description
server	server that is to be closed

Blocking Until a Server Closes

Format

webs_hold(<server>)

Parameter	Description
server	server that is to be waited for