support rtsp client

[harlanc]

Support pulling RTSP streams from the remote RTSP camera:

The xiu configuration file should be configured as follows:

##########################
#    RTSP configurations  #
##########################
[rtsp]
enabled = true
port = 5545
relay_enabled = true // relay_enabled must be true
[rtsp.auth]
pull_enabled = false
push_enabled = false
# simple or md5
algorithm = "simple"

Use the following HTTP API to start a pull task:

curl -X POST -H "Content-Type: application/json" -d '{
     "id" : "123",
     "identifier": {
                "rtsp": {
                    "stream_path": "live/test"
                }
            },
     "server_address":"localhost:5544",
     "relay_type":"Pull"
}' http://localhost:8001/api/start_relay_stream

• id : the task id which should be unique.
• stream_path: the rtsp stream path, for example: if the rtsp URL is rtsp://localhost:5544/live/test then the stream path is live/test
• relay_type : here must be Pull

And use the following API to stop the task:

curl -X POST -H "Content-Type: application/json" -d '{
     "id" : "123",
}' http://localhost:8001/api/stop_relay_stream