{"id":14847,"date":"2025-04-18T21:32:17","date_gmt":"2025-04-18T13:32:17","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/14847.html"},"modified":"2025-04-18T21:32:17","modified_gmt":"2025-04-18T13:32:17","slug":"server-sent-events%e4%b8%80%e7%a7%8d%e5%85%81%e8%ae%b8%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%90%91%e5%ae%a2%e6%88%b7%e7%ab%af%e5%8f%91%e9%80%81%e5%ae%9e%e6%97%b6%e6%9b%b4%e6%96%b0%e7%9a%84-web-api","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/14847.html","title":{"rendered":"Server-Sent Events\u4e00\u79cd\u5141\u8bb8\u670d\u52a1\u5668\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u5b9e\u65f6\u66f4\u65b0\u7684 Web API"},"content":{"rendered":"

Server-Sent Events（SSE）\u662f\u4e00\u79cd\u5141\u8bb8\u670d\u52a1\u5668\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u5b9e\u65f6\u66f4\u65b0\u7684 Web API\u3002\u5b83\u57fa\u4e8e HTTP \u534f\u8bae，\u63d0\u4f9b\u4e86\u4e00\u79cd\u5355\u5411\u7684\u3001\u670d\u52a1\u5668\u5230\u5ba2\u6237\u7aef\u7684\u901a\u4fe1\u673a\u5236，\u5ba2\u6237\u7aef\u53ef\u4ee5\u901a\u8fc7\u76d1\u542c\u670d\u52a1\u5668\u53d1\u9001\u7684\u4e8b\u4ef6\u6765\u63a5\u6536\u5b9e\u65f6\u6570\u636e\u3002\u4e0b\u9762\u4ece\u539f\u7406\u3001\u4f7f\u7528\u573a\u666f\u3001\u4ee3\u7801\u793a\u4f8b\u7b49\u65b9\u9762\u8fdb\u884c\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n

\u539f\u7406<\/h4>\n
  • \u8fde\u63a5\u5efa\u7acb：\u5ba2\u6237\u7aef\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a EventSource \u5bf9\u8c61\u5e76\u6307\u5b9a\u670d\u52a1\u5668\u7684 URL \u6765\u53d1\u8d77\u4e00\u4e2a HTTP \u8bf7\u6c42，\u5efa\u7acb\u4e0e\u670d\u52a1\u5668\u7684\u8fde\u63a5\u3002\u8fd9\u4e2a\u8fde\u63a5\u662f\u4e00\u4e2a\u6301\u4e45\u7684\u3001\u5355\u5411\u7684 HTTP \u8fde\u63a5，\u670d\u52a1\u5668\u53ef\u4ee5\u968f\u65f6\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e\u3002<\/li>\n
  • \u6570\u636e\u53d1\u9001：\u670d\u52a1\u5668\u4ee5\u7279\u5b9a\u7684\u683c\u5f0f（\u901a\u5e38\u662f text\/event-stream）\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u4e8b\u4ef6\u6d41\u3002\u6bcf\u4e2a\u4e8b\u4ef6\u7531\u4e8b\u4ef6\u7c7b\u578b\u3001\u6570\u636e\u548c\u53ef\u9009\u7684 ID \u7ec4\u6210，\u4f7f\u7528\u7b80\u5355\u7684\u6587\u672c\u683c\u5f0f\u8fdb\u884c\u7f16\u7801\u3002<\/li>\n
  • \u4e8b\u4ef6\u76d1\u542c：\u5ba2\u6237\u7aef\u901a\u8fc7\u76d1\u542c EventSource \u5bf9\u8c61\u7684\u4e0d\u540c\u4e8b\u4ef6（\u5982 message\u3001open\u3001error）\u6765\u5904\u7406\u670d\u52a1\u5668\u53d1\u9001\u7684\u6570\u636e\u3002\u5f53\u63a5\u6536\u5230\u65b0\u7684\u4e8b\u4ef6\u65f6，\u4f1a\u89e6\u53d1\u76f8\u5e94\u7684\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u3002<\/li>\n
  • \u91cd\u8fde\u673a\u5236：\u5982\u679c\u8fde\u63a5\u4e2d\u65ad，EventSource \u4f1a\u81ea\u52a8\u5c1d\u8bd5\u91cd\u65b0\u8fde\u63a5\u5230\u670d\u52a1\u5668，\u786e\u4fdd\u6570\u636e\u7684\u8fde\u7eed\u6027\u3002<\/li>\n

    \u4f7f\u7528\u573a\u666f<\/h4>\n
      \n
    • \u5b9e\u65f6\u65b0\u95fb\u66f4\u65b0：\u65b0\u95fb\u7f51\u7ad9\u53ef\u4ee5\u4f7f\u7528 SSE \u5b9e\u65f6\u5411\u7528\u6237\u63a8\u9001\u6700\u65b0\u7684\u65b0\u95fb\u6587\u7ae0\u3002<\/li>\n
    • \u80a1\u7968\u884c\u60c5：\u91d1\u878d\u5e94\u7528\u53ef\u4ee5\u901a\u8fc7 SSE \u5b9e\u65f6\u66f4\u65b0\u80a1\u7968\u4ef7\u683c\u548c\u5e02\u573a\u6570\u636e\u3002<\/li>\n
    • \u804a\u5929\u5e94\u7528：\u5728\u804a\u5929\u5e94\u7528\u4e2d，\u670d\u52a1\u5668\u53ef\u4ee5\u4f7f\u7528 SSE \u5411\u5ba2\u6237\u7aef\u5b9e\u65f6\u63a8\u9001\u65b0\u6d88\u606f\u3002<\/li>\n
    • \u76d1\u63a7\u7cfb\u7edf：\u76d1\u63a7\u7cfb\u7edf\u53ef\u4ee5\u4f7f\u7528 SSE \u5b9e\u65f6\u5411\u7ba1\u7406\u5458\u53d1\u9001\u670d\u52a1\u5668\u72b6\u6001\u3001\u6027\u80fd\u6307\u6807\u7b49\u4fe1\u606f\u3002<\/li>\n<\/ul>\n

      \u4ee3\u7801\u793a\u4f8b<\/h4>\n

      \u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528 Server-Sent Events \u7684\u7b80\u5355\u793a\u4f8b，\u5305\u62ec\u670d\u52a1\u5668\u7aef\u548c\u5ba2\u6237\u7aef（\u4f7f\u7528 JavaScript）\u3002<\/p>\n

      \u670d\u52a1\u5668\u7aef\u4ee3\u7801（go +gin）<\/h5>\n

      \/\/ StreamChat \u6d41\u5f0f\u8f93\u51fa\u804a\u5929\u4fe1\u606f<\/span>
      \n\/\/ @Summary \u6d41\u5f0f\u8f93\u51fa\u804a\u5929\u4fe1\u606f<\/span>
      \n\/\/ @Description \u6d41\u5f0f\u8f93\u51fa\u804a\u5929\u4fe1\u606f，\u5ba2\u6237\u7aef\u53ef\u4ee5\u5b9e\u65f6\u63a5\u6536\u6570\u636e\u3002<\/span>
      \n\/\/ @Tags Chat<\/span>
      \n\/\/ @Accept json<\/span>
      \n\/\/ @Produce text\/event-stream<\/span>
      \n\/\/ @Success 200 {string} string"data: 1\\\\n\\\\n"<\/span>
      \n\/\/ @Router \/web\/StreamChat [get]<\/span>
      \nfunc<\/span> (<\/span>u ChatController)<\/span> StreamChat<\/span>(<\/span>c *<\/span>gin.<\/span>Context)<\/span> {<\/span>
      \n\/\/ \u8bbe\u7f6e\u54cd\u5e94\u5934，\u6307\u5b9a\u5185\u5bb9\u7c7b\u578b\u4e3a\u6d41\u5f0f\u8f93\u51fa<\/span>
      \nc.<\/span>Writer.<\/span>Header<\/span>(<\/span>)<\/span>.<\/span>Set<\/span>(<\/span>"Content-Type"<\/span>,<\/span> "text\/event-stream"<\/span>)<\/span>
      \nc.<\/span>Writer.<\/span>Header<\/span>(<\/span>)<\/span>.<\/span>Set<\/span>(<\/span>"Cache-Control"<\/span>,<\/span> "no-cache"<\/span>)<\/span>
      \nc.<\/span>Writer.<\/span>Header<\/span>(<\/span>)<\/span>.<\/span>Set<\/span>(<\/span>"Connection"<\/span>,<\/span> "keep-alive"<\/span>)<\/span>
      \nc.<\/span>Writer.<\/span>Header<\/span>(<\/span>)<\/span>.<\/span>Set<\/span>(<\/span>"Access-Control-Allow-Origin"<\/span>,<\/span> "*"<\/span>)<\/span><\/p>\n

      \/\/ \u5faa\u73af\u8f93\u51fa 1 \u5230 100 \u7684\u6570\u5b57<\/span>
      \nfor<\/span> i :=<\/span> 1<\/span>;<\/span> i <=<\/span> 100<\/span>;<\/span> i++<\/span> {<\/span>
      \n\/\/ \u53d1\u9001\u6570\u636e<\/span>
      \nc.<\/span>Writer.<\/span>Write<\/span>(<\/span>[<\/span>]<\/span>byte<\/span>(<\/span>"data: "<\/span> +<\/span> string<\/span>(<\/span>i+<\/span>'0'<\/span>)<\/span> +<\/span> "\\\\n\\\\n"<\/span>)<\/span>)<\/span>
      \n\/\/ \u5237\u65b0\u7f13\u51b2\u533a，\u5c06\u6570\u636e\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef<\/span>
      \nc.<\/span>Writer.<\/span>(<\/span>http.<\/span>Flusher)<\/span>.<\/span>Flush<\/span>(<\/span>)<\/span>
      \n\/\/ \u6bcf\u9694 1 \u79d2\u8f93\u51fa\u4e00\u4e2a\u6570\u5b57<\/span>
      \ntime.<\/span>Sleep<\/span>(<\/span>time.<\/span>Second)<\/span>
      \n}<\/span><\/p>\n

      }<\/span><\/p>\n

      # Routers
      \nweb.<\/span>GET<\/span>(<\/span>"\/StreamChat"<\/span>,<\/span> func<\/span>(<\/span>c *<\/span>gin.<\/span>Context)<\/span> {<\/span>
      \ncontrollers.<\/span>ChatController{<\/span>}<\/span>.<\/span>StreamChat<\/span>(<\/span>c)<\/span>
      \n}<\/span>)<\/span><\/p>\n

      \u5ba2\u6237\u7aef\u4ee3\u7801（HTML + JavaScript）<\/h5>\n

      <!<\/span>DOCTYPE<\/span> html<\/span>><\/span><\/span>
      \n<<\/span>html<\/span> lang<\/span>=<\/span>"<\/span>en"<\/span><\/span>><\/span><\/span><\/p>\n

      <<\/span>head<\/span>><\/span><\/span>
      \n <<\/span>meta<\/span> charset<\/span>=<\/span>"<\/span>UTF-8"<\/span><\/span>><\/span><\/span>
      \n <<\/span>meta<\/span> name<\/span>=<\/span>"<\/span>viewport"<\/span><\/span> content<\/span>=<\/span>"<\/span>width=device-width, initial-scale=1.0"<\/span><\/span>><\/span><\/span>
      \n <<\/span>title<\/span>><\/span><\/span>Server-Sent Events Example<\/<\/span>title<\/span>><\/span><\/span>
      \n<\/<\/span>head<\/span>><\/span><\/span><\/p>\n

      <<\/span>body<\/span>><\/span><\/span>
      \n <<\/span>h1<\/span>><\/span><\/span>Real-time Updates<\/<\/span>h1<\/span>><\/span><\/span>
      \n <<\/span>ul<\/span> id<\/span>=<\/span>"<\/span>messages"<\/span><\/span>><\/span><\/span><\/<\/span>ul<\/span>><\/span><\/span><\/p>\n

      <<\/span>script<\/span>><\/span><\/span>
      \n const<\/span> eventSource =<\/span> new<\/span> EventSource<\/span>(<\/span>'\/web\/StreamChat'<\/span>)<\/span>;<\/span><\/p>\n

      eventSource.<\/span>onmessage<\/span> =<\/span> (<\/span>event<\/span>)<\/span> =><\/span> {<\/span>
      \n const<\/span> messagesList =<\/span> document.<\/span>getElementById<\/span>(<\/span>'messages'<\/span>)<\/span>;<\/span>
      \n const<\/span> newMessage =<\/span> document.<\/span>createElement<\/span>(<\/span>'li'<\/span>)<\/span>;<\/span>
      \n newMessage.<\/span>textContent =<\/span> event.<\/span>data;<\/span>
      \n messagesList.<\/span>appendChild<\/span>(<\/span>newMessage)<\/span>;<\/span>
      \n }<\/span>;<\/span><\/p>\n

      eventSource.<\/span>onerror<\/span> =<\/span> (<\/span>error<\/span>)<\/span> =><\/span> {<\/span>
      \n console.<\/span>error<\/span>(<\/span>'EventSource failed:'<\/span>,<\/span> error)<\/span>;<\/span>
      \n }<\/span>;<\/span>
      \n <\/span><\/span><\/<\/span>script<\/span>><\/span><\/span>
      \n<\/<\/span>body<\/span>><\/span><\/span><\/p>\n

      <\/<\/span>html<\/span>><\/span><\/span><\/p>\n

      \u4ee3\u7801\u89e3\u91ca<\/h4>\n
        \n
      • \n

        \u670d\u52a1\u5668\u7aef：\u8bbe\u7f6e\u54cd\u5e94\u5934：\u5728 streamNumbers \u51fd\u6570\u91cc，\u8bbe\u7f6e\u4e86\u4e00\u7cfb\u5217\u54cd\u5e94\u5934，\u4ee5\u6b64\u786e\u4fdd\u54cd\u5e94\u4e3a\u6d41\u5f0f\u8f93\u51fa，\u5e76\u4e14\u9632\u6b62\u7f13\u5b58\u3002\u5faa\u73af\u8f93\u51fa\u6570\u5b57：\u501f\u52a9 for \u5faa\u73af，\u4ece 1 \u5230 100 \u8f93\u51fa\u6570\u5b57，\u6bcf\u6b21\u8f93\u51fa\u4e00\u4e2a\u6570\u5b57\u540e，\u5237\u65b0\u7f13\u51b2\u533a\u628a\u6570\u636e\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef\u3002\u5b9a\u65f6\u8f93\u51fa：\u4f7f\u7528 time.Sleep \u51fd\u6570，\u4f7f\u6bcf\u4e2a\u6570\u5b57\u7684\u8f93\u51fa\u95f4\u9694\u4e3a 1 \u79d2\u3002<\/p>\n<\/li>\n

      • \n

        \u5ba2\u6237\u7aef：\u521b\u5efa\u4e00\u4e2a EventSource \u5bf9\u8c61\u5e76\u76d1\u542c \/web\/StreamChat \u4e8b\u4ef6，\u5f53\u63a5\u6536\u5230\u65b0\u7684\u4e8b\u4ef6\u65f6，\u5c06\u4e8b\u4ef6\u6570\u636e\u6dfb\u52a0\u5230\u9875\u9762\u7684\u5217\u8868\u4e2d\u3002\u540c\u65f6\u76d1\u542c error \u4e8b\u4ef6，\u5904\u7406\u8fde\u63a5\u9519\u8bef\u3002<\/p>\n<\/li>\n<\/ul>\n

        \u4f18\u7f3a\u70b9<\/h4>\n

        \u4f18\u70b9<\/h5>\n
          \n
        • \u7b80\u5355\u6613\u7528：\u57fa\u4e8e HTTP \u534f\u8bae，\u4f7f\u7528\u7b80\u5355，\u4e0d\u9700\u8981\u590d\u6742\u7684\u63e1\u624b\u548c\u8fde\u63a5\u7ba1\u7406\u3002<\/li>\n
        • \u81ea\u52a8\u91cd\u8fde：\u5ba2\u6237\u7aef\u4f1a\u81ea\u52a8\u5904\u7406\u8fde\u63a5\u4e2d\u65ad\u548c\u91cd\u8fde，\u786e\u4fdd\u6570\u636e\u7684\u8fde\u7eed\u6027\u3002<\/li>\n
        • \u6587\u672c\u683c\u5f0f：\u6570\u636e\u4ee5\u6587\u672c\u683c\u5f0f\u4f20\u8f93，\u6613\u4e8e\u7406\u89e3\u548c\u5904\u7406\u3002<\/li>\n<\/ul>\n
          \u7f3a\u70b9<\/h5>\n
            \n
          • \u5355\u5411\u901a\u4fe1：\u53ea\u80fd\u4ece\u670d\u52a1\u5668\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e，\u4e0d\u652f\u6301\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u53d1\u9001\u6570\u636e\u3002<\/li>\n
          • \u6d4f\u89c8\u5668\u517c\u5bb9\u6027：\u867d\u7136\u73b0\u4ee3\u6d4f\u89c8\u5668\u5927\u591a\u652f\u6301 SSE，\u4f46\u5728\u4e00\u4e9b\u65e7\u7248\u672c\u7684\u6d4f\u89c8\u5668\u4e2d\u53ef\u80fd\u4e0d\u652f\u6301\u3002<\/li>\n
          • \u6027\u80fd\u5f00\u9500：\u4e0e WebSocket \u76f8\u6bd4，SSE \u7684\u6027\u80fd\u5f00\u9500\u76f8\u5bf9\u8f83\u5927，\u56e0\u4e3a\u5b83\u662f\u57fa\u4e8e HTTP \u534f\u8bae\u7684\u3002<\/li>\n<\/ul>\n

            Server-Sent Events \u662f\u4e00\u79cd\u7b80\u5355\u3001\u6613\u7528\u7684\u5b9e\u65f6\u901a\u4fe1\u673a\u5236，\u9002\u7528\u4e8e\u670d\u52a1\u5668\u5411\u5ba2\u6237\u7aef\u5355\u5411\u63a8\u9001\u5b9e\u65f6\u6570\u636e\u7684\u573a\u666f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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