计算多个文件中多个字符串的出现次数(Counting occurrences of multiple strings in multiple files)

 我觉得你有点困惑， coturn 不是信号服务器 ，它是TURN / STUN服务器。 
 
 信令服务器是你在获得直接对等连接之前在对等体之间交换sdp，ice候选者和其他数据的东西，但是coturn不这样做。 
 
 我无法解释所有的比特，但是gist是STUN用于提供对等体的公共IP，而TURN用于代理点，用于在无法直接访问时从对等体发送和接收数据，并且在大多数情况下，所有你require是一个STUN服务器。 他们参与WebRTC应用程序的唯一时间是在创建PeerConnection对象时，您在配置对象中传递STUN / TURN服务器详细信息，例如： 
 
let pc = new RTCPeerConnection({
  "iceServers": [
    {"urls": "stun:example.com"},  // STUN Server address
    {"urls": "turn:example.com", "credential": "test", "username": "test"}  // TURN Server address
  ] 
}); 

I think you are bit confused, coturn is not a signalling server, it is a TURN/ STUN server. 
 
Signalling server is something though which you exchange sdp, ice candidates and other data between the peers before they get a direct peer to peer connection, coturn does not do that. 
 
I cannot explain all the bits, but gist is STUN is used for providing public IP of a peer, and TURN is used for a proxy point for transmitting and receving data from a peer when it cannot be directly accessed, and in most cases all you require is a STUN server. The only time they get involved in your WebRTC application is when you create the PeerConnection object, you pass the STUN/TURN server details in the config object, example:
 
let pc = new RTCPeerConnection({
  "iceServers": [
    {"urls": "stun:example.com"},  // STUN Server address
    {"urls": "turn:example.com", "credential": "test", "username": "test"}  // TURN Server address
  ] 
});