feat: 重新实现SseClient

src/common/sse/SseClient.ts

@@ -59,65 +59,69 @@ export class SseClient {
     this._connecting = true
     this.abortController = new AbortController()
 
-    await fetchEventSource(this.url, {
-      headers: { saToken: token },
-      signal: this.abortController.signal,
-      openWhenHidden: true,
+    try {
+      await fetchEventSource(this.url, {
+        headers: { saToken: token },
+        signal: this.abortController.signal,
+        openWhenHidden: true,
 
-      onopen: async (response) => {
-        const contentType = response.headers.get('content-type') || ''
+        onopen: async (response) => {
+          const contentType = response.headers.get('content-type') || ''
 
-        if (response.status === 401) {
-          throw new SseHttpError('SSE 鉴权失败', response)
+          if (response.status === 401) {
+            throw new SseHttpError('SSE 鉴权失败', response)
+          }
+          if (!response.ok) {
+            throw new SseHttpError(`SSE 连接失败: ${response.status}`, response)
+          }
+          if (!contentType.includes('text/event-stream')) {
+            throw new SseHttpError(`非法的响应类型: ${contentType || '空'}`, response)
+          }
+
+          this._connecting = false
+          this._connected = true
+          this.retryCount = 0
+          this.callbacks.onConnected?.()
+        },
+
+        onmessage: (message) => {
+          if (!message.event || !message.data) {
+            return
+          }
+          this.callbacks.onMessage(message.event, message.data)
+        },
+
+        onclose: () => {
+          this._connecting = false
+          this._connected = false
+        },
+
+        onerror: (error) => {
+          this._connecting = false
+          this._connected = false
+
+          // 401 → 通知外部刷新 token
+          if (isSseHttpError(error) && error.response.status === 401) {
+            this.callbacks.onUnauthorized?.()
+            throw error
+          }
+
+          this.retryCount += 1
+          if (this.retryCount >= this.maxRetries) {
+            this.callbacks.onError?.('实时连接异常，请刷新页面')
+            throw error
+          }
+
+          const delay = Math.min(
+            this.baseRetryDelayMs * Math.pow(2, this.retryCount - 1),
+            this.maxRetryDelayMs
+          )
+          return delay
         }
-        if (!response.ok) {
-          throw new SseHttpError(`SSE 连接失败: ${response.status}`, response)
-        }
-        if (!contentType.includes('text/event-stream')) {
-          throw new SseHttpError(`非法的响应类型: ${contentType || '空'}`, response)
-        }
-
-        this._connecting = false
-        this._connected = true
-        this.retryCount = 0
-        this.callbacks.onConnected?.()
-      },
-
-      onmessage: (message) => {
-        if (!message.event || !message.data) {
-          return
-        }
-        this.callbacks.onMessage(message.event, message.data)
-      },
-
-      onclose: () => {
-        this._connecting = false
-        this._connected = false
-      },
-
-      onerror: (error) => {
-        this._connecting = false
-        this._connected = false
-
-        // 401 → 通知外部刷新 token
-        if (isSseHttpError(error) && error.response.status === 401) {
-          this.callbacks.onUnauthorized?.()
-          throw error
-        }
-
-        this.retryCount += 1
-        if (this.retryCount >= this.maxRetries) {
-          this.callbacks.onError?.('实时连接异常，请刷新页面')
-          throw error
-        }
-
-        const delay = Math.min(
-          this.baseRetryDelayMs * Math.pow(2, this.retryCount - 1),
-          this.maxRetryDelayMs
-        )
-        return delay
-      }
-    })
+      })
+    } catch (error) {
+      // fetchEventSource 仅在重连耗尽或 401 时 throw，状态已在 onerror 中处理
+    }
   }
 
   /** 断开连接（主动关闭，不重连） */