大道之行，始于足下

简单模拟httpGET方法

OPTIONS rtsp://localhost:554/test RTSP/1.0CSeq: 1User-Agent: Lavf56.40.101RTSP/1.0 200 OKCSeq: 1Session: si6RsaIngPublic: DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, OPTIONS, ANNOUNCE, RECORDANNOUNCE rtsp://localhost:554/test RTSP/1.0Content-Type: ap