fix(报警推送): 修复报警推送功能无效的问题

该问题原因为 com.genersoft.iot.vmp.conf.GlobalResponseAdvice 类改变了 sse 响应体的数据结构，导致前端无法正确解析 sse 数据，调试后未发现 GlobalResponseAdvice 如何修改的 sse 数据结构，故根据 sse 消息体结构自定义实现了 sse 连接

src/main/java/com/genersoft/iot/vmp/vmanager/gb28181/SseController/SseController.java

@@ -1,37 +0,0 @@
-package com.genersoft.iot.vmp.vmanager.gb28181.SseController;
-
-import com.genersoft.iot.vmp.gb28181.event.alarm.AlarmEventListener;
-
-import io.swagger.v3.oas.annotations.tags.Tag;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.CrossOrigin;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
-
-/**
- * @description: SSE推送
- * @author: lawrencehj
- * @data: 2021-01-20
- */
-@Tag(name  = "SSE推送")
-
-@Controller
-@RequestMapping("/api")
-public class SseController {
-    @Autowired
-    AlarmEventListener alarmEventListener;
-
-    @GetMapping("/emit")
-    public SseEmitter emit(@RequestParam String browserId) {
-        final SseEmitter sseEmitter = new SseEmitter(0L);
-        try {
-            alarmEventListener.addSseEmitters(browserId, sseEmitter);
-        }catch (Exception e){
-            sseEmitter.completeWithError(e);
-        }
-        return sseEmitter;
-    }
-}

src/main/java/com/genersoft/iot/vmp/vmanager/gb28181/sse/SseController.java

@@ -0,0 +1,55 @@
+package com.genersoft.iot.vmp.vmanager.gb28181.sse;
+
+import com.genersoft.iot.vmp.gb28181.event.alarm.AlarmEventListener;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.annotation.Resource;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+
+/**
+ * SSE 推送.
+ *
+ * @author lawrencehj
+ * @author <a href="mailto:xiaoQQya@126.com">xiaoQQya</a>
+ * @since 2021/01/20
+ */
+@Tag(name = "SSE 推送")
+@RestController
+@RequestMapping("/api")
+public class SseController {
+
+    @Resource
+    private AlarmEventListener alarmEventListener;
+
+    /**
+     * SSE 推送.
+     *
+     * @param response  响应
+     * @param browserId 浏览器ID
+     * @throws IOException IOEXCEPTION
+     * @author <a href="mailto:xiaoQQya@126.com">xiaoQQya</a>
+     * @since 2023/11/06
+     */
+    @GetMapping("/emit")
+    public void emit(HttpServletResponse response, @RequestParam String browserId) throws IOException, InterruptedException {
+        response.setContentType("text/event-stream");
+        response.setCharacterEncoding("utf-8");
+
+        PrintWriter writer = response.getWriter();
+        alarmEventListener.addSseEmitter(browserId, writer);
+
+        while (!writer.checkError()) {
+            Thread.sleep(1000);
+            writer.write(":keep alive\n\n");
+            writer.flush();
+        }
+        alarmEventListener.removeSseEmitter(browserId, writer);
+    }
+}