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一、App版本（iOS為例）

單方向連接：

1.界面app已設(shè)定好，輸入房間號后，點擊join按鈕。

[NSURLConnection sendAsynchronousRequest:request

queue:[NSOperationQueue mainQueue]

completionHandler:^(NSURLResponse *response,

NSData *data,

NSError *error) {

if (completionHandler) {

completionHandler(response, data, error);

}

}];

向服務(wù)器發(fā)送請求：

request:GET : turnServerUrl=https://域名/index.php?username=apprtc&key=0xc401269c75bda99dd198c568d5694730

response:{ URL:https://域名/index.php?username=apprtc&key=0xc401269c75bda99dd198c568d5694730} { status code: 200, headers {

Connection = "keep-alive";

"Content-Type" = "text/html";

Date = "Fri, 16 Jun 2017 09:10:29 GMT";

Server = "nginx/1.5.9";

"Transfer-Encoding" = Identity;

"X-Powered-By" = "PHP/5.5.9-1ubuntu4.21";

} }

data:

iceServers =? ? (

{

credential = "yjp0ArWpl1s8vOYegRGpYRU/XzU=";

ttl = 86400;

urls =? ? ? ? ? ? (

"turn:域名:3478?transport=udp",

"turn:域名:3478?transport=tcp",

"turn:域名 :3479?transport=udp",

"turn:域名 :3479?transport=tcp"

);

username = "1497605539:";

}

);

request:POST: url =https://域名/join/123456

response:{ URL:https://域名/join/123456} { status code: 200, headers {

"Cache-Control" = "no-cache";

Connection = "keep-alive";

"Content-Length" = 1230;

"Content-Type" = "text/html; charset=utf-8";

Date = "Fri, 16 Jun 2017 09:38:42 GMT";

Server = "nginx/1.5.9";

} }

data:

params? ? Object

wss_url? ? "wss://域名:4432/ws"

pc_config? ? "{\"rtcpMuxPolicy\": \"require…dlePolicy\": \"max-bundle\"}"

room_id? ? "622620833"

turn_url? ? "https://域名/index…username=27212903&key=apprtc"

error_messages? ? []

wss_post_url? ? "https:/域名:4432"

callstats_params? ? "{\"appId\": \"none\", \"appSecret\": \"none\"}"

include_rtstats_js? ? ""

version_info? ? "{\"branch\": \"master\", \"gi…Mar 6 07:49:29 2017 +0100\"}"

messages? ? []

ice_server_transports? ? ""

warning_messages? ? []

media_constraints? ? "{\"video\": true, \"audio\": true}"

is_loopback? ? "false"

pc_constraints? ? "{\"optional\": []}"

room_link? ? "http://域名/r/roomID"

offer_options? ? "{}"

is_initiator? ? "true"

ice_server_url? ? "https://域名/v1alpha/iceconfig?key=none"

include_loopback_js? ? ""

client_id? ? "27212903"

turn_server_override? ? []

bypass_join_confirmation? ? "false"

result? ? “SUCCESS"

2.上面返回的信息中有wss_url，”wss://域名:4432/ws"，wss_post_url“https://域名:4432”，即是websocketUrl，初始化websocket,注冊信令，創(chuàng)建主機tcp? /ip端口可讀寫流。

3.創(chuàng)建peerconnection ,創(chuàng)建LocalMediaStream:videoTrack，audioTrack.發(fā)送offer.

4.通過websocket輸入輸出

outPutStream: outPutBuffer:

GET /ws HTTP/1.1

Host:域名 :4432

Sec-WebSocket-Version:13

Upgrade:websocket

Dec-WebSocket-Key:tu1zu……==

Connection:Upgrade Origin:https://域名:4432

inputStream:readBuffer

HTTP1.1? 101 Switching Protocols

Upgrade? "websocket"

Connection? ? "Upgrade"

Sec-WebSocket-Accept? ? "geUmCmY/h7EFD1/qjbtzyfy1g04="

服務(wù)器返回上面代碼，表示websocket協(xié)議請求成功，狀態(tài)碼101表示服務(wù)器客戶端升級協(xié)議的請求正在進行協(xié)議切換，以后的通信就是websocket協(xié)議，后續(xù)就可以tcp通訊了。

5.websocket注冊成功：

log：WebSocket connection opened.

Registering on WSS for rid:123456 cid:09876543

outPutStream:outPutBuffer：

message = {

"cmd" : "register",

"roomid" : "123456",

"clientid" : "09876543"

}

6.log :Signaling state changed: 1:LocalOffer

ICE gathering state changed: 1:Checking

調(diào)用PTCPeerConection方法實現(xiàn)

7.SDP

log:

C->RS POST: {"type":"offer","sdp":"v=0\r\no=- 7930074291607742461 2 IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\na=group:BUNDLE audio video\r\na=msid-semantic: WMS ARDAMS\r\nm=audio 9 UDP\/TLS\/RTP\/SAVPF 111 103 104 9 102 0 8 106 105 13 127 126\r\nc=IN IP4 0.0.0.0\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=ice-ufrag:9z7jtEySOjadK2L3\r\na=ice-pwd:P1FSuJPZnkh3t3OU+JWzY3tn\r\na=fingerprint:sha-256 CB:94:1B:E8:AB:B0:D6:EC:BC:B6:54:52:87:17:FC:8D:B4:76:3A:FA:6C:96:D7:BE:32:D7:BD:33:26:5D:20:55\r\na=setup:actpass\r\na=mid:audio\r\na=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\na=extmap:3 http:\/\/www.webrtc.org\/experiments\/rtp-hdrext\/abs-send-time\r\na=sendrecv\r\na=rtcp-mux\r\na=rtpmap:111 opus\/48000\/2\r\na=fmtp:111 minptime=10; useinbandfec=1\r\na=rtpmap:103 ISAC\/16000\r\na=rtpmap:104 ISAC\/32000\r\na=rtpmap:9 G722\/8000\r\na=rtpmap:102 ILBC\/8000\r\na=rtpmap:0 PCMU\/8000\r\na=rtpmap:8 PCMA\/8000\r\na=rtpmap:106 CN\/32000\r\na=rtpmap:105 CN\/16000\r\na=rtpmap:13 CN\/8000\r\na=rtpmap:127 red\/8000\r\na=rtpmap:126 telephone-event\/8000\r\na=maxptime:60\r\na=ssrc:282299390 cname:dwTJJogpUnEjR9By\r\na=ssrc:282299390 msid:ARDAMS ARDAMSa0\r\na=ssrc:282299390 mslabel:ARDAMS\r\na=ssrc:282299390 label:ARDAMSa0\r\nm=video 9 UDP\/TLS\/RTP\/SAVPF 100 101 116 117 96\r\nc=IN IP4 0.0.0.0\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=ice-ufrag:9z7jtEySOjadK2L3\r\na=ice-pwd:P1FSuJPZnkh3t3OU+JWzY3tn\r\na=fingerprint:sha-256 CB:94:1B:E8:AB:B0:D6:EC:BC:B6:54:52:87:17:FC:8D:B4:76:3A:FA:6C:96:D7:BE:32:D7:BD:33:26:5D:20:55\r\na=setup:actpass\r\na=mid:video\r\na=extmap:2 urn:ietf:params:rtp-hdrext:toffset\r\na=extmap:3 http:\/\/www.webrtc.org\/experiments\/rtp-hdrext\/abs-send-time\r\na=extmap:4 urn:3gpp:video-orientation\r\na=sendrecv\r\na=rtcp-mux\r\na=rtpmap:100 VP8\/90000\r\na=rtcp-fb:100 ccm fir\r\na=rtcp-fb:100 nack\r\na=rtcp-fb:100 nack pli\r\na=rtcp-fb:100 goog-remb\r\na=rtpmap:101 VP9\/90000\r\na=rtcp-fb:101 ccm fir\r\na=rtcp-fb:101 nack\r\na=rtcp-fb:101 nack pli\r\na=rtcp-fb:101 goog-remb\r\na=rtpmap:116 red\/90000\r\na=rtpmap:117 ulpfec\/90000\r\na=rtpmap:96 rtx\/90000\r\na=fmtp:96 apt=100\r\na=ssrc-group:FID 797147928 458665663\r\na=ssrc:797147928 cname:dwTJJogpUnEjR9By\r\na=ssrc:797147928 msid:ARDAMS ARDAMSv0\r\na=ssrc:797147928 mslabel:ARDAMS\r\na=ssrc:797147928 label:ARDAMSv0\r\na=ssrc:458665663 cname:dwTJJogpUnEjR9By\r\na=ssrc:458665663 msid:ARDAMS ARDAMSv0\r\na=ssrc:458665663 mslabel:ARDAMS\r\na=ssrc:458665663 label:ARDAMSv0\r\n”}

[self sendSignalingMessage:sdp]

[self sendSignalingMessageToRoomServer:sdp completionHandler:nil];

sdp:

v=0

o=- 631685190248252292 2 IN IP4 127.0.0.1

s=-

t=0 0

a=group:BUNDLE audio video

a=msid-semantic: WMS ARDAMS

m=audio 9 UDP/TLS/RTP/SAVPF 111 103 104 9 102 0 8 106 105 13 127 126

c=IN IP4 0.0.0.0

a=rtcp:9 IN IP4 0.0.0.0

a=ice-ufrag:ktg6AGYFl6ibNPGY

a=ice-pwd:ZL5KQbLLCNZkDIy0Zt0DXWZ2

a=fingerprint:sha-256 DF:4B:02:9E:4E:78:98:75:BD:E8:13:B4:FD:E5:72:EE:24:B5:36:43:73:6E:A1:3C:4C:13:FD:7A:15:30:5F:E8

a=setup:actpass

a=mid:audio

a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level

a=extmap:3http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time

a=sendrecv

a=rtcp-mux

a=rtpmap:111 opus/48000/2

a=fmtp:111 minptime=10; useinbandfec=1

a=rtpmap:103 ISAC/16000

a=rtpmap:104 ISAC/32000

a=rtpmap:9 G722/8000

a=rtpmap:102 ILBC/8000

a=rtpmap:0 PCMU/8000

a=rtpmap:8 PCMA/8000

a=rtpmap:106 CN/32000

a=rtpmap:105 CN/16000

a=rtpmap:13 CN/8000

a=rtpmap:127 red/8000

a=rtpmap:126 telephone-event/8000

a=maxptime:60

a=ssrc:1330996120 cname:BeTH+Ahwn2YbXhAJ

a=ssrc:1330996120 msid:ARDAMS ARDAMSa0

a=ssrc:1330996120 mslabel:ARDAMS

a=ssrc:1330996120 label:ARDAMSa0

m=video 9 UDP/TLS/RTP/SAVPF 100 101 116 117 96

c=IN IP4 0.0.0.0

a=rtcp:9 IN IP4 0.0.0.0

a=ice-ufrag:ktg6AGYFl6ibNPGY

a=ice-pwd:ZL5KQbLLCNZkDIy0Zt0DXWZ2

a=fingerprint:sha-256 DF:4B:02:9E:4E:78:98:75:BD:E8:13:B4:FD:E5:72:EE:24:B5:36:43:73:6E:A1:3C:4C:13:FD:7A:15:30:5F:E8

a=setup:actpass

a=mid:video

a=extmap:2 urn:ietf:params:rtp-hdrext:toffset

a=extmap:3http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time

a=extmap:4 urn:3gpp:video-orientation

a=sendrecv

a=rtcp-mux

a=rtpmap:100 VP8/90000

a=rtcp-fb:100 ccm fir

a=rtcp-fb:100 nack

a=rtcp-fb:100 nack pli

a=rtcp-fb:100 goog-remb

a=rtpmap:101 VP9/90000

a=rtcp-fb:101 ccm fir

a=rtcp-fb:101 nack

a=rtcp-fb:101 nack pli

a=rtcp-fb:101 goog-remb

a=rtpmap:116 red/90000

a=rtpmap:117 ulpfec/90000

a=rtpmap:96 rtx/90000

a=fmtp:96 apt=100

a=ssrc-group:FID 3011579612 365513713

a=ssrc:3011579612 cname:BeTH+Ahwn2YbXhAJ

a=ssrc:3011579612 msid:ARDAMS ARDAMSv0

a=ssrc:3011579612 mslabel:ARDAMS

a=ssrc:3011579612 label:ARDAMSv0

a=ssrc:365513713 cname:BeTH+Ahwn2YbXhAJ

a=ssrc:365513713 msid:ARDAMS ARDAMSv0

a=ssrc:365513713 mslabel:ARDAMS

a=ssrc:365513713 label:ARDAMSv0

request:request.HTTPMethod = POST: url =https://域名/message/45677/60574066

A. request.HTTPBody =sdp;

block函數(shù)為nil,沒有設(shè)置返回值

B.request.HTTPBody =icecandidate;

其中icecandidate 從[peerConnection? gotICECandidate]獲取到的。

log :{

"label" : 0,

"id" : "audio",

"candidate" : "candidate:3672176605 1 udp 2122260223 192.168.153.194 55122 typ host generation 0",

"type" : "candidate"

}

{"label" : 1,

"id" : "video",

"candidate" : "candidate:3005921308 1 udp 1686052607 1.85.223.111 10107 typ srflx raddr 192.168.153.194 rport 65478 generation 0",

"type" : "candidate"

}

response:

{ URL:https://域名/message/46789/02181168} { status code: 200, headers {

"Cache-Control" = "no-cache";

Connection = "keep-alive";

"Content-Length" = 21;

"Content-Type" = "text/html; charset=utf-8";

Date = "Fri, 16 Jun 2017 10:50:36 GMT";

Server = "nginx/1.5.9";

} }

data:result :SUCCESS

房間服務(wù)器收到 /message/消息后將request.HTTPBody的信息sdp，icecandidate發(fā)送給信令服務(wù)器。

8.掛斷

request :POST:url =https://域名/leave/123456/09876543

response:{ URL:https://域名/leave/123456/09876543}{ status code: 200, headers {

"Cache-Control" = "no-cache";

Connection = "keep-alive";

"Content-Type" = "text/html; charset=utf-8";

Date = "Fri, 16 Jun 2017 09:38:42 GMT";

Server = "nginx/1.5.9";

} }

data :0 bytes

outPutStream:outPutBuffer：

message = {

"cmd" : "send",

"msg":"{type:"bye"}"

}

websocket:

request :DELETE:url =https://域名:4432 /123456/09876543

request.HTTPMethod:"Delete"

request.HTTPBody:nil

response:{ URL:https://域名:4432/123456/09876543}{ status code: 200, headers {

"Acess-Control-Allow-Methods" = "POST,DELETE";

"Acess-Control-Allow-Origin"="*"

"Content-Length" = 3;

Connection = "keep-alive";

"Content-Type" = "text/html; charset=utf-8";

Date = "Fri, 16 Jun 2017 09:38:42 GMT";

Server = "nginx/1.5.9";

} }

data :OK

加入到同一個房間

房間的最大人數(shù)是在房間服務(wù)器room.go中設(shè)定，默認(rèn)為2個人。client A 注冊房間號，向websocket發(fā)送

message = {

"cmd" : "register",

"roomid" : "123456",

"clientid" : "09876543"

}

信息，clientID 是隨機生成的，當(dāng)client A和client B進入同一個房間時，websocket打開client A 和client B的ReadWriteClose接口，會相互發(fā)送對方的msg

獲取到對方的sdp，answer和icecandidate

inputStream：readBuffer

{"type":"answer","sdp":"v=0\r\no=- 2842181041571733368 2 IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\na=group:BUNDLE audio video\r\na=msid-semantic: WMS ARDAMS\r\nm=audio 9 UDP\/TLS\/RTP\/SAVPF 111 103 104 9 102 0 8 106 105 13 126\r\nc=IN IP4 0.0.0.0\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=ice-ufrag:5EBa\r\na=ice-pwd:+BOWo0ZqtrGNvmtWWCtHX0QC\r\na=ice-options:renomination\r\na=fingerprint:sha-256 E5:06:2E:37:E8:13:0C:45:B3:AC:28:92:71:5B:60:32:6D:E8:B7:D5:E2:96:B0:E5:17:B6:92:33:6A:1C:DF:8E\r\na=setup:active\r\na=mid:audio\r\na=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\na=sendrecv\r\na=rtcp-mux\r\na=rtpmap:111 opus\/48000\/2\r\na=fmtp:111 minptime=10;useinbandfec=1\r\na=rtpmap:103 ISAC\/16000\r\na=rtpmap:104 ISAC\/32000\r\na=rtpmap:9 G722\/8000\r\na=rtpmap:102 ILBC\/8000\r\na=rtpmap:0 PCMU\/8000\r\na=rtpmap:8 PCMA\/8000\r\na=rtpmap:106 CN\/32000\r\na=rtpmap:105 CN\/16000\r\na=rtpmap:13 CN\/8000\r\na=rtpmap:126 telephone-event\/8000\r\na=ssrc:1892460007 cname:DBqx+KdFlQmMiVm6\r\na=ssrc:1892460007 msid:ARDAMS ARDAMSa0\r\na=ssrc:1892460007 mslabel:ARDAMS\r\na=ssrc:1892460007 label:ARDAMSa0\r\nm=video 9 UDP\/TLS\/RTP\/SAVPF 100 101 116 117 96\r\nc=IN IP4 0.0.0.0\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=ice-ufrag:5EBa\r\na=ice-pwd:+BOWo0ZqtrGNvmtWWCtHX0QC\r\na=ice-options:renomination\r\na=fingerprint:sha-256 E5:06:2E:37:E8:13:0C:45:B3:AC:28:92:71:5B:60:32:6D:E8:B7:D5:E2:96:B0:E5:17:B6:92:33:6A:1C:DF:8E\r\na=setup:active\r\na=mid:video\r\na=extmap:2 urn:ietf:params:rtp-hdrext:toffset\r\na=extmap:3 http:\/\/www.webrtc.org\/experiments\/rtp-hdrext\/abs-send-time\r\na=extmap:4 urn:3gpp:video-orientation\r\na=sendrecv\r\na=rtcp-mux\r\na=rtpmap:100 VP8\/90000\r\na=rtcp-fb:100 ccm fir\r\na=rtcp-fb:100 nack\r\na=rtcp-fb:100 nack pli\r\na=rtcp-fb:100 goog-remb\r\na=rtpmap:101 VP9\/90000\r\na=rtcp-fb:101 ccm fir\r\na=rtcp-fb:101 nack\r\na=rtcp-fb:101 nack pli\r\na=rtcp-fb:101 goog-remb\r\na=rtpmap:116 red\/90000\r\na=rtpmap:117 ulpfec\/90000\r\na=rtpmap:96 rtx\/90000\r\na=fmtp:96 apt=100\r\na=ssrc-group:FID 3263650902 1527749129\r\na=ssrc:3263650902 cname:DBqx+KdFlQmMiVm6\r\na=ssrc:3263650902 msid:ARDAMS ARDAMSv0\r\na=ssrc:3263650902 mslabel:ARDAMS\r\na=ssrc:3263650902 label:ARDAMSv0\r\na=ssrc:1527749129 cname:DBqx+KdFlQmMiVm6\r\na=ssrc:1527749129 msid:ARDAMS ARDAMSv0\r\na=ssrc:1527749129 mslabel:ARDAMS\r\na=ssrc:1527749129 label:ARDAMSv0\r\n"}

{"type":"candidate","label":0,"id":"audio","candidate":"candidate:1300829926

1 udp 2122260223 192.168.153.186 36349 typ host generation 0 ufrag Xe0D

network-id 3 network-cost 10"}

二、Web網(wǎng)頁版

1.獲取網(wǎng)頁界面信息

GEThttps://域名/[HTTP/1.1 200 OK 32ms]

response:網(wǎng)頁界面信息html

GEThttps://域名/css/main.css[HTTP/1.1 304 Not Modified 23ms]

main.css中的內(nèi)容如網(wǎng)頁的長寬、顏色等

GEThttps://域名/callstats/callstats.min.js[HTTP/1.1 304 Not Modified 44ms]

GEThttps://域名/callstats/sha.js[HTTP/1.1 304 Not Modified 65ms]

sha.js:加密信息

GEThttps://域名/callstats/socket.io.js[HTTP/1.1 304 Not Modified 65ms]

socket.io.js:websocket protocol

GEThttps://域名/js/apprtc.debug.js[HTTP/1.1 304 Not Modified 70ms]

GEThttps://www.google-analytics.com/analytics.js[HTTP/2.0 304 Not Modified 62ms]

GEThttps://www.google-analytics.com/r/collect[HTTP/2.0 200 OK 73ms]

2.輸入房間號，點擊join按鈕，加入房間

POST XHRhttps://域名/join/040075152[HTTP/1.1 200 OK 35ms]

3.連接websocket協(xié)議

GEThttps://域名:4432/ws[HTTP/1.1 101 Switching Protocols 49ms]

4.給服務(wù)器發(fā)送sdp和icecandidate信息，房間服務(wù)器轉(zhuǎn)將信息轉(zhuǎn)發(fā)給信令服務(wù)器

POST XHRhttps://域名/message/040075152/13888651[HTTP/1.1 200 OK 44ms]

POST XHRhttps://域名/message/040075152/13888651[HTTP/1.1 200 OK 36ms]

POST XHRhttps://域名/message/040075152/13888651[HTTP/1.1 200 OK 46ms]

POST XHRhttps://域名/message/040075152/13888651[HTTP/1.1 200 OK 51ms]

POST XHRhttps://域名/message/040075152/13888651[HTTP/1.1 200 OK 42ms]

POST XHRhttps://域名/message/040075152/13888651[HTTP/1.1 200 OK 29ms]

POST XHRhttps://域名/message/040075152/13888651[HTTP/1.1 200 OK 30ms]

POST XHRhttps://域名/message/040075152/13888651[HTTP/1.1 200 OK 31ms]

POST XHRhttps://域名/message/040075152/13888651[HTTP/1.1 200 OK 32ms]

response:result SUCCESS

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room server,signaling server 和客戶端之間的交互

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room server,signaling server 和客戶端之間的交互

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友情鏈接更多精彩內(nèi)容

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