C implementation of server and WebSocket handshake failure problem-CodePudding

 for (;; ) {
Clientfd=accept (sockfd, (struct sockaddr *) & amp; Client_addr, 
& Cliaddr_len); 
Printf (" server get connection from % s \ n ", inet_ntoa (
Client_addr. Sin_addr)); 
Int readize=0; 
While ((readize=read (clientfd, buf, MAXLINE)) & gt; 0 {
Printf (" %. * s ", readize, buf); 
Length: printf (" % d... \ n ", readize); 
} 
Write (clientfd, buf, readize); 
Close (clientfd); 
}

Above is a simple demo server, when I was in shake hands with the WebSocket client also in such a process, to handle the request, if the inclusion

 GET/HTTP/1.1 
Connection: Upgrade 
Host: 127.0.0.1:8088 
Origin: null 
The Sec - WebSocket - Extensions: x - its deflate - frame 
The Sec - WebSocket - Key: puVOuWb7rel6z2AVZBKnfw==
The Sec - WebSocket - Version: 13 
Upgrade: websocket

Go to parse and then send the head and then return to

 HTTP/1.1 101 Switching separate Protocols 
Connection: Upgrade 
Server: beetle websocket Server 
Upgrade: WebSocket 
Date: Mon, 26 Nov 2012 23:42:44 GMT 
Access - Control - Allow - Credentials: true 
Access - Control - Allow - Headers: the content-type 
The Sec - WebSocket - Accept: FCKgUr8c7OsDsLFeJTWrJw6WO8Q=

Because just learning, now the problem is, I don't understand why every time we do have a close loop, if close the client can get the head, but an error real server has been closed, if not close, the client has been didn't get the data, the problem bothering me for a long time, a great god, please help me to look at, very grateful!