webSocket以及https
阿新 • • 發佈:2020-07-15
需求:就是當後臺操作完大量的資料之後,需要通知前端修改狀態,於是第一時間想到了使用WebSocket。
概念的話這裡就不解釋了。
直接貼上我的程式碼,在springBoot中的使用。
首先在pom.xml中加入依賴
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-websocket</artifactId> </dependency>
將配置類加入容器管理
@Configuration public class WebSocketConfiguration { @Bean public ServerEndpointExporter serverEndpointExporter(){ return new ServerEndpointExporter(); } }
websocket服務端
@ServerEndpoint("/websocket/submitOnline") @Component public class WebSocketServer { private Logger log = Logger.getLogger("webSocketServer");private static Map<String, Session> clients = new ConcurrentHashMap<>(); @Autowired private AdsMsgPlanService adsMsgPlanService; public static WebSocketServer webSocketServer; @PostConstruct public void init(){ webSocketServer = this; webSocketServer.adsMsgPlanService= this.adsMsgPlanService; } @OnOpen public void onOpen(Session session) throws InterruptedException { log.info("有新客戶端連線了"+session.getId()); clients.put(session.getId(),session); } @OnClose public void onClose(Session session){ log.info("有使用者斷開了"+session.getId()); clients.remove(session.getId()); } @OnError public void onError(Throwable throwable){ throwable.printStackTrace(); } @OnMessage public void onMessage(String message){ log.info("服務端收到客戶端發來的訊息"+message);
//這裡是我自己的業務邏輯 Result result = null; try { SubmitOnlineVo submitOnlineVo = new SubmitOnlineVo(); submitOnlineVo.setId(Integer.parseInt(message)); submitOnlineVo.setStatus(PlanStatusConstant.ATONLINE); Integer i = webSocketServer.adsMsgPlanService.updatePlan(submitOnlineVo); if(i==-1){ result = new Result(BusinessConstant.SYSTEM_ERROR_CODE, "上線人數超過30萬!!!", i); }else if(i==0){ result = new Result(BusinessConstant.SYSTEM_ERROR_CODE, "修改失敗", i); }else{ Map<String,String> map = new HashMap<>(); map.put("id",message); map.put("status","上線待投放"); result = new Result(BusinessConstant.SYSTEM_SUCESS_CODE, "修改成功", map); } this.sendAll(JSON.toJSONString(result)); }catch (Exception e){ e.printStackTrace(); result = new Result(BusinessConstant.SYSTEM_ERROR_CODE, e.getMessage(), null); this.sendAll(JSON.toJSONString(result)); } } private void sendAll(String message){ for (Map.Entry<String, Session> sessionEntry : clients.entrySet()) { sessionEntry.getValue().getAsyncRemote().sendText(message); } } }
客戶端程式碼(前端並不是我寫的,只是自己測試的時候寫的一個簡單頁面)
<html> <head></head> <body> <div id="messageId"></div> <script> var socket; if(typeof(WebSocket) == "undefined") { console.log("您的瀏覽器不支援WebSocket"); }else{ console.log("您的瀏覽器支援WebSocket"); //實現化WebSocket物件,指定要連線的伺服器地址與埠 建立連線 socket = new WebSocket("ws://localhost:8080/websocket/submitOnline"); //開啟事件 socket.onopen = function() { console.log("Socket 已開啟"); socket.send("dfgh"); }; //獲得訊息事件 socket.onmessage = function(msg) { console.log(msg.data); //發現訊息進入 開始處理前端觸發邏輯 let msgDiv = document.getElementById("messageId"); msgDiv.innerHTML += msg.data; }; //關閉事件 socket.onclose = function() { console.log("Socket已關閉"); }; //發生了錯誤事件 socket.onerror = function() { alert("Socket發生了錯誤"); //此時可以嘗試重新整理頁面 } } </script> </body> </html>
這個時候一個websocket已經搭建好了,但是這個時候的安全性存在問題.
因為是ws,就類似於http嘛,所以就想弄成wss的,也就是https
然後我這邊通過jdk生成一個金鑰來在本地實現一個https.
在cmd中輸入(要配置了jdk的環境變數)
keytool -genkey -alias tomcat -storetype PKCS12 -keyalg RSA -keysize 2048 -keystore keystore.p12 -validity 3650
引數就不一一解釋了.
然後會在c盤/使用者/當前使用者資料夾下生成一個keystore.p12的檔案.
將它放到專案的resources目錄下,然後在application.properties檔案中加入如下配置
server.port=8443 server.ssl.enabled=true server.ssl.key-store=classpath:keystore.p12 server.ssl.key-store-password=ouyang(你在cmd中輸入的密碼) server.ssl.key-store-type=PKCS12 server.ssl.key-alias=tomcat
然後一個配置類(允許http和https請求同時存在,將http轉發到https)
@Configuration public class ConnectorConfig { @Bean public ServletWebServerFactory servletContainer() { TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory() { @Override protected void postProcessContext(Context context) { SecurityConstraint securityConstraint = new SecurityConstraint(); securityConstraint.setUserConstraint("CONFIDENTIAL"); SecurityCollection collection = new SecurityCollection(); collection.addPattern("/*");//設定所有路徑都配置https securityConstraint.addCollection(collection); context.addConstraint(securityConstraint); } }; tomcat.addAdditionalTomcatConnectors(getHttpConnector()); return tomcat; } private Connector getHttpConnector() { Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol"); connector.setScheme("http"); connector.setPort(8080); connector.setSecure(false); connector.setRedirectPort(8443); return connector; } }
如果要在postman中測試還需要關閉ssl certificate verification
這時候我們就可以將客戶端的websocket程式碼改成wss來保證安全性了,當然這只是本地測試,在實際的生產環境應該都是https協議,所以直接使用wss就行。