mirror of https://bitbucket.org/ausocean/av.git
134 lines
3.1 KiB
Go
134 lines
3.1 KiB
Go
/*
|
|
NAME
|
|
client.go
|
|
|
|
DESCRIPTION
|
|
client.go provides a Client type providing functionality to send RTSP requests
|
|
of methods DESCRIBE, OPTIONS, SETUP and PLAY to an RTSP server.
|
|
|
|
AUTHORS
|
|
Saxon A. Nelson-Milton <saxon@ausocean.org>
|
|
|
|
LICENSE
|
|
This is Copyright (C) 2019 the Australian Ocean Lab (AusOcean).
|
|
|
|
It is free software: you can redistribute it and/or modify them
|
|
under the terms of the GNU General Public License as published by the
|
|
Free Software Foundation, either version 3 of the License, or (at your
|
|
option) any later version.
|
|
|
|
It is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
in gpl.txt. If not, see http://www.gnu.org/licenses.
|
|
*/
|
|
package rtsp
|
|
|
|
import (
|
|
"bufio"
|
|
"net"
|
|
"net/url"
|
|
"strconv"
|
|
)
|
|
|
|
// Client describes an RTSP Client.
|
|
type Client struct {
|
|
cSeq int
|
|
addr string
|
|
url *url.URL
|
|
conn net.Conn
|
|
sessionID string
|
|
}
|
|
|
|
// NewClient returns a pointer to a new Client. The URL u will be parsed and
|
|
// a connection to the RTSP server will be made.
|
|
func NewClient(u string) (*Client, error) {
|
|
s := &Client{addr: u}
|
|
var err error
|
|
s.url, err = url.Parse(u)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
s.conn, err = net.Dial("tcp", s.url.Host)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return s, nil
|
|
}
|
|
|
|
// Describe forms and sends an RTSP request of method DESCRIBE to the RTSP server.
|
|
func (c *Client) Describe() (*Response, error) {
|
|
req, err := NewRequest(describe, c.nextCSeq(), c.url, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
req.Header.Add("Accept", "application/sdp")
|
|
return c.Do(req)
|
|
}
|
|
|
|
// Options forms and sends an RTSP request of method OPTIONS to the RTSP server.
|
|
func (c *Client) Options() (*Response, error) {
|
|
req, err := NewRequest(options, c.nextCSeq(), c.url, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return c.Do(req)
|
|
}
|
|
|
|
// Setup forms and sends an RTSP request of method SETUP to the RTSP server.
|
|
func (c *Client) Setup(track, transport string) (*Response, error) {
|
|
url, err := url.Parse(c.addr + "/" + track)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
req, err := NewRequest(setup, c.nextCSeq(), url, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
req.Header.Add("Transport", transport)
|
|
|
|
resp, err := c.Do(req)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
c.sessionID = resp.Header.Get("Session")
|
|
|
|
return resp, err
|
|
}
|
|
|
|
// Play forms and sends an RTSP request of method PLAY to the RTSP server
|
|
func (c *Client) Play() (*Response, error) {
|
|
req, err := NewRequest(play, c.nextCSeq(), c.url, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
req.Header.Add("Session", c.sessionID)
|
|
|
|
return c.Do(req)
|
|
}
|
|
|
|
// Do sends the given RTSP request r and reads any responses, return the response
|
|
// and any errors.
|
|
func (c *Client) Do(r *Request) (*Response, error) {
|
|
err := r.Write(c.conn)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
res, err := ReadResponse(bufio.NewReader(c.conn))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return res, nil
|
|
}
|
|
|
|
func (c *Client) nextCSeq() string {
|
|
c.cSeq++
|
|
return strconv.Itoa(c.cSeq)
|
|
}
|