dpp::websocket_client Class Reference

Implements a websocket client based on the SSL client. More...

#include <wsclient.h>

Inheritance diagram for dpp::websocket_client:

Collaboration diagram for dpp::websocket_client:

Public Member Functions
	websocket_client (const std::string &hostname, const std::string &port="443", const std::string &urlpath="", ws_opcode opcode=OP_BINARY)
virtual	~websocket_client ()
virtual void	write (const std::string &data)
	Write to websocket. Encapsulates data in frames if the status is CONNECTED. More...
virtual bool	handle_buffer (std::string &buffer)
	Processes incoming frames from the SSL socket input buffer. More...
virtual void	close ()
	Close websocket. More...
virtual bool	HandleFrame (const std::string &buffer)
	Receives raw frame content only without headers. More...
virtual void	Error (uint32_t errorcode)
	Called upon error frame. More...
virtual void	one_second_timer ()
uint64_t	get_bytes_out ()
uint64_t	get_bytes_in ()
std::string	get_cipher ()
void	read_loop ()
	Nonblocking I/O loop. More...
virtual void	log (dpp::loglevel severity, const std::string &msg) const
	Log a message. More...

Public Attributes
std::function< dpp::socket()>	custom_readable_fd
	Attaching an additional file descriptor to this function will send notifications when there is data to read. More...
std::function< dpp::socket()>	custom_writeable_fd
	Attaching an additional file descriptor to this function will send notifications when you are able to write to the socket. More...
std::function< void()>	custom_readable_ready
	This event will be called when you can read from the custom fd. More...
std::function< void()>	custom_writeable_ready
	This event will be called when you can write to a custom fd. More...

Protected Member Functions
virtual void	Connect ()
ws_state	GetState ()

Protected Attributes
std::string	buffer
std::string	obuffer
bool	nonblocking
dpp::socket	sfd
opensslcontext *	ssl
std::string	cipher
time_t	last_tick
std::string	hostname
std::string	port
uint64_t	bytes_out
uint64_t	bytes_in

Detailed Description

Implements a websocket client based on the SSL client.

Constructor & Destructor Documentation

websocket_client()

dpp::websocket_client::websocket_client	(	const std::string &	hostname,
		const std::string &	port = "443",
		const std::string &	urlpath = "",
		ws_opcode	opcode = OP_BINARY
	)

Connect to a specific websocket server.

Parameters

hostname	Hostname to connect to
port	Port to connect to
urlpath	The URL path components of the HTTP request to send
opcode	The encoding type to use, either OP_BINARY or OP_TEXT

Note

Voice websockets only support OP_TEXT, and other websockets must be OP_BINARY if you are going to send ETF.

~websocket_client()

virtual dpp::websocket_client::~websocket_client ( )

virtual

Destructor

Member Function Documentation

close()

virtual void dpp::websocket_client::close ( )

virtual

Close websocket.

Reimplemented from dpp::ssl_client.

Connect()

virtual void dpp::websocket_client::Connect ( )

protectedvirtual

(Re)connect

Reimplemented from dpp::ssl_client.

Error()

virtual void dpp::websocket_client::Error ( uint32_t  errorcode )

virtual

Called upon error frame.

Parameters

errorcode

The error code from the websocket server

Reimplemented in dpp::discord_client, and dpp::discord_voice_client.

get_bytes_in()

uint64_t dpp::ssl_client::get_bytes_in ( )

inherited

Get total bytes received

get_bytes_out()

uint64_t dpp::ssl_client::get_bytes_out ( )

inherited

Get total bytes sent

get_cipher()

std::string dpp::ssl_client::get_cipher ( )

inherited

Get SSL cipher name

GetState()

ws_state dpp::websocket_client::GetState ( )

protected

Get websocket state

Returns

websocket state

handle_buffer()

virtual bool dpp::websocket_client::handle_buffer ( std::string &  buffer )

virtual

Processes incoming frames from the SSL socket input buffer.

Parameters

buffer

The buffer contents. Can modify this value removing the head elements when processed.

Reimplemented from dpp::ssl_client.

HandleFrame()

virtual bool dpp::websocket_client::HandleFrame ( const std::string &  buffer )

virtual

Receives raw frame content only without headers.

Parameters

buffer

The buffer contents

Returns

True if the frame was successfully handled. False if no valid frame is in the buffer.

Reimplemented in dpp::discord_client, and dpp::discord_voice_client.

log()

virtual void dpp::ssl_client::log ( dpp::loglevel  severity, const std::string &  msg  ) const

virtualinherited

Log a message.

Parameters

severity	severity of log message
msg	Log message to send

Reimplemented in dpp::discord_client, and dpp::discord_voice_client.

one_second_timer()

virtual void dpp::websocket_client::one_second_timer ( )

virtual

Fires every second from the underlying socket I/O loop, used for sending webscocket pings

Reimplemented from dpp::ssl_client.

Reimplemented in dpp::discord_client, and dpp::discord_voice_client.

read_loop()

void dpp::ssl_client::read_loop ( )

inherited

Nonblocking I/O loop.

Exceptions

std::exception

Any std::exception (or derivative) thrown from read_loop() causes reconnection of the shard

write()

virtual void dpp::websocket_client::write ( const std::string &  data )

virtual

Write to websocket. Encapsulates data in frames if the status is CONNECTED.

Parameters

data	The data to send.

Reimplemented from dpp::ssl_client.

Member Data Documentation

buffer

std::string dpp::ssl_client::buffer

protectedinherited

Input buffer received from openssl

bytes_in

uint64_t dpp::ssl_client::bytes_in

protectedinherited

Bytes in

bytes_out

uint64_t dpp::ssl_client::bytes_out

protectedinherited

Bytes out

cipher

std::string dpp::ssl_client::cipher

protectedinherited

SSL cipher in use

custom_readable_fd

std::function<dpp::socket()> dpp::ssl_client::custom_readable_fd

inherited

Attaching an additional file descriptor to this function will send notifications when there is data to read.

NOTE: Only hook this if you NEED it as it can increase CPU usage of the thread! Returning -1 means that you don't want to be notified.

custom_readable_ready

std::function<void()> dpp::ssl_client::custom_readable_ready

inherited

This event will be called when you can read from the custom fd.

custom_writeable_fd

std::function<dpp::socket()> dpp::ssl_client::custom_writeable_fd

inherited

Attaching an additional file descriptor to this function will send notifications when you are able to write to the socket.

NOTE: Only hook this if you NEED it as it can increase CPU usage of the thread! You should toggle this to -1 when you do not have anything to write otherwise it'll keep triggering repeatedly (it is level triggered).

custom_writeable_ready

std::function<void()> dpp::ssl_client::custom_writeable_ready

inherited

This event will be called when you can write to a custom fd.

hostname

std::string dpp::ssl_client::hostname

protectedinherited

Hostname connected to

last_tick

time_t dpp::ssl_client::last_tick

protectedinherited

For timers

nonblocking

bool dpp::ssl_client::nonblocking

protectedinherited

True if in nonblocking mode. The socket switches to nonblocking mode once ReadLoop is called.

obuffer

std::string dpp::ssl_client::obuffer

protectedinherited

Output buffer for sending to openssl

port

std::string dpp::ssl_client::port

protectedinherited

Port connected to

sfd

dpp::socket dpp::ssl_client::sfd

protectedinherited

Raw file descriptor of connection

ssl

opensslcontext* dpp::ssl_client::ssl

protectedinherited

Openssl opaque contexts