WebSocket握手期间出错:意外的响应代码:302 [英] Error during WebSocket handshake: Unexpected response code: 302
问题描述
在将基于REACT的WebSocket客户端连接到基于Java Jetty的Web Socket服务器时,出现以下错误-
WebSocket connection to 'ws://localhost:2319/ws' failed: Error during WebSocket handshake: Unexpected response code: 302
通过Chrome的Smart Web Socket客户端连接时不存在此错误.
我正在尝试基于REACT开发Web套接字客户端.客户端代码为-
var connection = new WebSocket('ws://localhost:2319/ws');
connection.onopen = function () {
// connection is opened and ready to use
};
WebSocket服务器已基于Jetty.服务器代码为-
server = new Server();
ServerConnector connector = new ServerConnector(server);
connector.setPort(SSConstants.WWBSOCKET_PORT);
server.addConnector(connector);
// Setup the basic application "context" for this application at "/"
// This is also known as the handler tree (in jetty speak)
ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
context.setContextPath("/ws"); // Set to "/ws" for future integration with the main jetty server.
server.setHandler(context);
try {
// Initialize javax.websocket layer
ServerContainer wsContainer = WebSocketServerContainerInitializer.configureContext(context);
// Add WebSocket endpoint to javax.websocket layer
wsContainer.addEndpoint(WebsocketListener.class);
server.start();
}
catch (Throwable t) {
ssLogger.logInfo("Websocket Server start exp : ");
t.printStackTrace(System.err);
}
输出-
WebSocket connection to 'ws://localhost:2319/ws' failed: Error during WebSocket handshake: Unexpected response code: 302
Request URL:ws://localhost:2319/ws
Request Method:GET
Status Code:302 Found
Response Headers
view source
Content-Length:0
Date:Fri, 11 Aug 2017 18:51:42 GMT
Location:http://localhost:2319/ws/
Server:Jetty(9.3.8.v20160314)
Request Headers
view source
Accept-Encoding:gzip, deflate, br
Accept-Language:en-US,en;q=0.8
Cache-Control:no-cache
Connection:Upgrade
Host:localhost:2319
Origin:https://localhost:1338
Pragma:no-cache
Sec-WebSocket-Extensions:permessage-deflate; client_max_window_bits
Sec-WebSocket-Key:2OZooIjOX7G6kgNpPOz9Fw==
Sec-WebSocket-Version:13
Upgrade:websocket
User-Agent:Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36
Name
ws://localhost:2319/ws
不是有效的端点URL/URI,它想要重定向到您声明的/ws
的正确URL/URI >
这就是302重定向告诉您的情况...
Location: http://localhost:2319/ws/
假设您的WebsocketListener
被声明为@ServerEndpoint("/ws")
,我们在"/ws"
的contextPath
处使用您的ServletContext
,这意味着您的URL/URI访问该websocket端点是...
ws://localhost:2319/ws/ws
或者说另一种方式...
ws://<host>:<port>/<contextPath>/<endpointPath>
While connecting to REACT based WebSocket client to Java Jetty based Web Socket server, I am getting the error below -
WebSocket connection to 'ws://localhost:2319/ws' failed: Error during WebSocket handshake: Unexpected response code: 302
This error doesn't exist while connecting through Chrome's Smart Web Socket client.
I am trying to develop Web Socket Client based on REACT. Client code is -
var connection = new WebSocket('ws://localhost:2319/ws');
connection.onopen = function () {
// connection is opened and ready to use
};
WebSocket Server has been based on Jetty. Server code is -
server = new Server();
ServerConnector connector = new ServerConnector(server);
connector.setPort(SSConstants.WWBSOCKET_PORT);
server.addConnector(connector);
// Setup the basic application "context" for this application at "/"
// This is also known as the handler tree (in jetty speak)
ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
context.setContextPath("/ws"); // Set to "/ws" for future integration with the main jetty server.
server.setHandler(context);
try {
// Initialize javax.websocket layer
ServerContainer wsContainer = WebSocketServerContainerInitializer.configureContext(context);
// Add WebSocket endpoint to javax.websocket layer
wsContainer.addEndpoint(WebsocketListener.class);
server.start();
}
catch (Throwable t) {
ssLogger.logInfo("Websocket Server start exp : ");
t.printStackTrace(System.err);
}
Output -
WebSocket connection to 'ws://localhost:2319/ws' failed: Error during WebSocket handshake: Unexpected response code: 302
Request URL:ws://localhost:2319/ws
Request Method:GET
Status Code:302 Found
Response Headers
view source
Content-Length:0
Date:Fri, 11 Aug 2017 18:51:42 GMT
Location:http://localhost:2319/ws/
Server:Jetty(9.3.8.v20160314)
Request Headers
view source
Accept-Encoding:gzip, deflate, br
Accept-Language:en-US,en;q=0.8
Cache-Control:no-cache
Connection:Upgrade
Host:localhost:2319
Origin:https://localhost:1338
Pragma:no-cache
Sec-WebSocket-Extensions:permessage-deflate; client_max_window_bits
Sec-WebSocket-Key:2OZooIjOX7G6kgNpPOz9Fw==
Sec-WebSocket-Version:13
Upgrade:websocket
User-Agent:Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36
Name
ws://localhost:2319/ws
is not the valid endpoint URL/URI, it wants to redirect to the correct one for your declared contextPath
of /ws
That's what the 302 redirect is telling you ...
Location: http://localhost:2319/ws/
Lets say your WebsocketListener
is declared as @ServerEndpoint("/ws")
, and we use your ServletContext
at contextPath
of "/ws"
that would mean your URL/URI to access that websocket endpoint is ...
ws://localhost:2319/ws/ws
Or said in a different way ...
ws://<host>:<port>/<contextPath>/<endpointPath>
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