When I tried using WebSocket in my spring boot application I got this error : "WebSocket connection to 'ws://localhost:8080/Moda/chatroomServerEndpoint' failed: Error during WebSocket handshake: Unexpected response code: 400" (Default.html-Line 11).. My aim : Send message by two different tabs (ex: in Google Chrome) Please help me! Thank you...
Default.html
<!<!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Deneme</title> <script type = "text/javascript"> var websocket = new WebSocket("ws://localhost:8080/Moda/chatroomServerEndpoint"); websocket.onmessage = function processMessage(message) { var jsonData = JSON.parse(message.data); if(jsonData.message != null) messagesTextArea.value += jsonData.message + "\n"; } function sendMessage(){ websocket.send(messageText.value); messageText.value = ""; } </script> </head> <body> <textarea id="messagesTextArea" readonly = "readonly" rows="10" cols="45"></textarea><br/> <input type = "text" id="messageText" size="50" /><input type="button" value="Send" onclick="sendMessage();" /> </body> </html>ModaApplication.java
package com.moda; import java.io.IOException; import java.io.StringWriter; import java.util.Collections; import java.util.HashSet; import java.util.Iterator; import java.util.Set; import javax.json.Json; import javax.json.JsonObject; import javax.json.JsonWriter; import javax.websocket.OnClose; import javax.websocket.OnMessage; import javax.websocket.OnOpen; import javax.websocket.Session; import javax.websocket.server.ServerEndpoint; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Import; import org.springframework.web.socket.config.annotation.EnableWebSocket; import com.moda.videochat.MyWebSocketConfigurator; @Configuration @EnableAutoConfiguration @ServerEndpoint("/chatroomServerEndpoint") public class ModaApplication { public static void main(String[] args) { SpringApplication.run(ModaApplication.class, args); } static Set<Session> chatroomUsers = Collections.synchronizedSet(new HashSet<Session>()); @OnOpen public void handleOpen(Session userSession) { chatroomUsers.add(userSession); } @OnMessage public void handleMessage(String message, Session userSession) throws IOException { String username = (String) userSession.getUserProperties().get("username"); if(username == null) { userSession.getUserProperties().get("username"); userSession.getBasicRemote().sendText(buildJsonData("System","you are now connected as " + message)); } else { Iterator<Session> iterator = chatroomUsers.iterator(); while(iterator.hasNext()) iterator.next().getBasicRemote().sendText(buildJsonData(username,message)); } } @OnClose public void handleClose(Session userSession) { chatroomUsers.remove(userSession); } private String buildJsonData(String username, String message) { JsonObject jsonObject = Json.createObjectBuilder().add("message",username+": "+message).build(); StringWriter stringWriter = new StringWriter(); try (JsonWriter jsonWriter = Json.createWriter(stringWriter)) {jsonWriter.write(jsonObject);} return null; } }
