我读过一个类似的问题,但我的问题没有解决。
为了学习,我正在尝试构建自己的 Java WebSocket 服务器。服务器设置得很好,它接受传入的连接并从客户端获取握手数据。然后我的服务器计算握手返回数据并尝试写入并刷新它。尽管如此,在 web 检查器中,没有显示客户端的响应标头,并且onopen
-JavaScript 事件永远不会触发。
String EOL = System.getProperty("line.separator"); // actually a class-defined constant
BufferedReader inputStream = currentClient.getInputStream();
OutputStream outputStream = currentClient.getOutputStream();
String inputLine;
String handshake = "";
try {
if(!inputStream.ready()){ continue; }
System.out.println("Receiving:\n");
while ((inputLine = inputStream.readLine()).length() > 0) {
if(inputLine.startsWith("Sec-WebSocket-Key: ")){
String inputKey = inputLine.replace("Sec-WebSocket-Key: ", "");
String outputKey = WebSocket.getWebSocketKey(inputKey);
handshake += "HTTP/1.1 101 Switching Protocols"+EOL;
handshake += "Upgrade: websocket"+EOL;
handshake += "Connection: Upgrade"+EOL;
handshake += "Sec-WebSocket-Accept: "+outputKey;
}
System.out.println(inputLine);
}
} catch (Exception e) {
e.printStackTrace();
}
System.out.println("\n\nSending:\n");
System.out.println(handshake);
try {
outputStream.write(handshake.getBytes(Charset.forName("UTF-8")));
outputStream.flush();
} catch (IOException e) {
e.printStackTrace();
}
所以这是我得到的一个例子:
GET / HTTP/1.1
Upgrade: websocket
Connection: Upgrade
Host: localhost:65432
Origin: http://localhost
Sec-WebSocket-Key: ph1CO1PCF60uojeP+nql5A==
Sec-WebSocket-Version: 13
Sec-WebSocket-Extensions: x-webkit-deflate-frame
我尝试发送的内容:
HTTP/1.1 101 Switching Protocols
Upgrade: websocket
Connection: Upgrade
Sec-WebSocket-Accept: Z2Vy9p7Lp+MZPdZOe+L5GhVBDpc=
我想指出,发送我发送的标头应该就足够了,因为在我开发的 PHP WebSocket 服务器中,仅发送这些标头即可。