{"id":92056,"date":"2026-08-09T05:32:44","date_gmt":"2026-08-08T21:32:44","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/92056.html"},"modified":"2026-08-09T05:32:44","modified_gmt":"2026-08-08T21:32:44","slug":"%e4%b8%80%e6%96%87%e6%90%9e%e6%87%82-sse%e5%a4%a7%e6%a8%a1%e5%9e%8b%e9%80%90%e5%ad%97%e8%be%93%e5%87%ba%e7%9a%84%e8%83%8c%e5%90%8e%e6%9c%8d%e5%8a%a1%e5%99%a8%e6%98%af%e6%80%8e%e4%b9%88","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/92056.html","title":{"rendered":"\u4e00\u6587\u641e\u61c2 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\u4e24\u4e2a\u7279\u70b9&#xff0c;\u51b3\u5b9a\u4e86\u540e\u9762\u6574\u6761\u6f14\u8fdb\u7ebf\u7684\u8d70\u5411&#xff1a;<\/p>\n<ul>\n<li>\u65e0\u72b6\u6001&#xff1a;\u6bcf\u6b21\u95ee\u7b54\u76f8\u4e92\u72ec\u7acb&#xff0c;\u670d\u52a1\u5668\u5929\u751f\u4e0d\u8bb0\u5f97\u201c\u4e0a\u6b21\u90a3\u4e2a\u8c01\u201d\u3002\u767b\u5f55\u6001\u9760\u7684\u662f\u5ba2\u6237\u7aef\u6bcf\u6b21\u4e3b\u52a8\u638f\u51fa\u51ed\u8bc1&#xff08;Cookie\u3001\u4ee4\u724c&#xff09;&#xff0c;\u800c\u4e0d\u662f\u8fde\u63a5\u672c\u8eab\u6709\u8bb0\u5fc6\u3002<\/li>\n<li>\u5ba2\u6237\u7aef\u5148\u5f00\u53e3&#xff1a;\u54cd\u5e94\u6c38\u8fdc\u6302\u5728\u67d0\u4e2a\u8bf7\u6c42\u540e\u9762&#xff0c;\u670d\u52a1\u5668\u6ca1\u6cd5\u4e3b\u52a8\u627e\u5230\u6d4f\u89c8\u5668\u8bf4\u201c\u6211\u8fd9\u6709\u65b0\u4e1c\u897f\u201d\u3002<\/li>\n<\/ul>\n<p>\u8fde\u63a5\u5c42\u9762&#xff0c;HTTP \u4e00\u76f4\u5728\u7ed9\u81ea\u5df1\u63d0\u901f&#xff1a;HTTP\/1.0 \u65f6\u4ee3\u6bcf\u95ee\u4e00\u6b21\u90fd\u8981\u91cd\u65b0\u5efa\u4e00\u6b21 TCP \u8fde\u63a5&#xff1b;1997 \u5e74\u7684 HTTP\/1.1 \u9ed8\u8ba4\u5f00\u542f keep-alive&#xff0c;\u4e00\u6761\u8fde\u63a5\u53ef\u4ee5\u8fde\u7740\u95ee\u597d\u51e0\u6b21&#xff1b;2015 \u5e74\u7684 HTTP\/2 \u5728\u4e00\u6761\u8fde\u63a5\u4e0a\u591a\u8def\u590d\u7528&#xff0c;\u591a\u4e2a\u8bf7\u6c42\u54cd\u5e94\u4ea4\u9519\u4f20\u8f93\u3001\u4e92\u4e0d\u6392\u961f&#xff1b;2022 \u5e74\u7684 HTTP\/3 \u5e72\u8106\u628a\u5e95\u5c42\u7684 TCP \u6362\u6210\u4e86 QUIC\u3002\u4f46\u8fd9\u4e9b\u8fdb\u5316\u7701\u7684\u90fd\u662f\u201c\u95ee\u7b54\u201d\u7684\u6210\u672c&#xff0c;\u201c\u53ea\u80fd\u5ba2\u6237\u7aef\u5148\u5f00\u53e3\u201d\u8fd9\u6761\u89c4\u77e9&#xff0c;\u4e00\u4e2a\u5b57\u6ca1\u52a8\u8fc7\u3002<\/p>\n<h3>\u670d\u52a1\u5668\u60f3\u4e3b\u52a8\u5f00\u53e3:\u8f6e\u8be2\u4e0e\u957f\u8f6e\u8be2<\/h3>\n<p>\u65e9\u671f\u7f51\u9875\u9700\u8981&#034;\u65b0\u6d88\u606f\u63d0\u9192&#034;\u65f6,\u5de5\u7a0b\u5e08\u53ea\u80fd\u5728 HTTP \u7684\u89c4\u77e9\u91cc\u60f3\u529e\u6cd5\u3002\u65e2\u7136\u670d\u52a1\u5668\u4e0d\u80fd\u4e3b\u52a8\u8bf4,\u90a3\u5c31\u8ba9\u5ba2\u6237\u7aef\u52e4\u5feb\u70b9\u95ee\u3002<\/p>\n<p>\u8f6e\u8be2:\u6bcf\u9694\u51e0\u79d2\u53d1\u4e00\u4e2a\u8bf7\u6c42\u2014\u2014\u201c\u6709\u65b0\u6d88\u606f\u5417?\u201d&#034;\u6ca1\u6709\u3002&#034;\u8fc7\u51e0\u79d2\u518d\u95ee:\u201c\u6709\u65b0\u6d88\u606f\u5417?\u201d\u201c\u6ca1\u6709\u3002\u201d\u2026\u2026\u5b9e\u73b0\u7b80\u5355,\u4ee3\u4ef7\u4e5f\u76f4\u767d:\u7edd\u5927\u90e8\u5206\u8bf7\u6c42\u662f\u7a7a\u8dd1\u7684,\u767d\u767d\u6d88\u8017\u5e26\u5bbd\u548c\u670d\u52a1\u5668\u8d44\u6e90;\u6d88\u606f\u771f\u6765\u7684\u65f6\u5019,\u4e5f\u8981\u7b49\u4e0b\u4e00\u4e2a\u95ee\u70b9\u624d\u80fd\u88ab\u53d1\u73b0,\u65f6\u6548\u6027\u53d6\u51b3\u4e8e\u95f4\u9694\u957f\u77ed\u3002\u95f4\u9694\u8c03\u77ed,\u7a7a\u8dd1\u66f4\u591a;\u8c03\u957f,\u6d88\u606f\u66f4\u6162\u3002<\/p>\n<p>\u957f\u8f6e\u8be2\u628a\u7a7a\u8dd1\u538b\u4e86\u4e0b\u53bb:\u5ba2\u6237\u7aef\u53d1\u95ee\u540e,\u670d\u52a1\u5668\u4e0d\u6025\u7740\u7b54,\u628a\u8bf7\u6c42\u6302\u5728\u90a3\u513f;\u4ec0\u4e48\u65f6\u5019\u6709\u6d88\u606f\u4e86,\u4ec0\u4e48\u65f6\u5019\u624d\u628a\u54cd\u5e94\u53d1\u56de\u6765;\u8981\u662f\u4e00\u76f4\u6ca1\u6709,\u62d6\u5230\u8d85\u65f6(\u6bd4\u5982 30 \u79d2)\u5c31\u56de\u4e2a\u7a7a\u7684,\u5ba2\u6237\u7aef\u6536\u5230\u540e\u7acb\u523b\u518d\u95ee\u4e00\u8f6e\u3002\u6d88\u606f\u9001\u8fbe\u7684\u5ef6\u8fdf\u4ece&#034;\u534a\u4e2a\u8f6e\u8be2\u95f4\u9694&#034;\u964d\u5230\u63a5\u8fd1\u96f6,\u7a7a\u8dd1\u4e5f\u5c11\u4e86\u3002\u4f46\u672c\u8d28\u4e0a\u6bcf\u6761\u6d88\u606f\u4ecd\u8981\u5b8c\u6210\u4e00\u6b21\u5b8c\u6574\u7684\u4e00\u95ee\u4e00\u7b54,\u6302\u8d77\u7684\u8bf7\u6c42\u5360\u7740\u670d\u52a1\u5668\u7684\u8fde\u63a5\u8d44\u6e90,\u5b9e\u73b0\u4e0a\u8fd8\u8981\u81ea\u5df1\u5904\u7406\u8d85\u65f6\u3001\u91cd\u8fde\u3001\u6d88\u606f\u987a\u5e8f\u8fd9\u4e9b\u7ec6\u8282\u3002<\/p>\n<p>\u8fd9\u7c7b\u6280\u5de7\u5f53\u5e74\u6709\u4e2a\u7edf\u79f0\u53eb Comet\u3002\u80fd\u7528,\u4f46\u8bf4\u5230\u5e95,\u8fd9\u662f\u5728&#034;\u4e00\u95ee\u4e00\u7b54&#034;\u7684\u6846\u67b6\u91cc\u6253\u8865\u4e01\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808213240-6a77a078d869a.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>WebSocket:\u4e00\u6b21\u63e1\u624b,\u6362\u6765\u4e00\u6761\u53cc\u5411\u4e13\u7ebf<\/h3>\n<p>2011 \u5e74 12 \u6708,RFC 6455 \u5b9a\u7a3f,WebSocket \u6210\u4e3a\u6b63\u5f0f\u6807\u51c6\u3002\u5b83\u7684\u601d\u8def\u662f\u4e0d\u518d\u6253\u8865\u4e01:\u65e2\u7136&#034;\u4e00\u95ee\u4e00\u7b54&#034;\u4e0d\u591f\u7528,\u90a3\u5c31\u901a\u8fc7\u4e00\u6b21\u63e1\u624b,\u628a\u8fde\u63a5\u5347\u7ea7\u6210\u4e00\u6761\u53cc\u5411\u4e13\u7ebf\u3002<\/p>\n<p>**\u63e1\u624b\u672c\u8eab\u501f HTTP \u5b8c\u6210\u3002**\u5ba2\u6237\u7aef\u5148\u53d1\u4e00\u4e2a\u770b\u4f3c\u666e\u901a\u7684 HTTP \u8bf7\u6c42,\u53ea\u662f\u5934\u90e8\u5e26\u4e86\u4e24\u4e2a\u7279\u6b8a\u5b57\u6bb5:<\/p>\n<p>GET \/chat HTTP\/1.1<br \/>\nUpgrade: websocket<br \/>\nConnection: Upgrade<br \/>\nSec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ&#061;&#061;<\/p>\n<p>Upgrade: websocket \u7684\u610f\u601d\u662f:\u8fd9\u6b21\u95ee\u7b54\u7ed3\u675f\u540e,\u8fd9\u6761\u8fde\u63a5\u60f3\u6362\u4e2a\u534f\u8bae\u7ee7\u7eed\u7528\u3002\u670d\u52a1\u5668\u5982\u679c\u540c\u610f,\u5c31\u56de\u4e00\u4e2a 101(Switching Protocols):<\/p>\n<p>HTTP\/1.1 101 Switching Protocols<br \/>\nUpgrade: websocket<br \/>\nConnection: Upgrade<br \/>\nSec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK&#043;xOo&#061;<\/p>\n<p>Sec-WebSocket-Accept \u662f\u628a\u5ba2\u6237\u7aef\u53d1\u6765\u7684 Key \u62fc\u4e0a\u4e00\u6bb5\u56fa\u5b9a\u7684 GUID,\u7b97\u4e00\u904d SHA-1 \u518d\u505a base64\u3002\u8fd9\u4e0d\u662f\u52a0\u5bc6,\u800c\u662f\u4e00\u6b21\u5bf9\u6697\u53f7:\u53cc\u65b9\u4ee5\u6b64\u786e\u8ba4\u5bf9\u65b9\u771f\u7684\u61c2 WebSocket,\u800c\u4e0d\u662f\u6070\u597d\u56de\u4e86\u4e2a\u5947\u602a\u7684\u54cd\u5e94\u3002<\/p>\n<p>\u63e1\u624b\u5b8c\u6210\u4e4b\u540e,\u540c\u4e00\u6761 TCP \u8fde\u63a5\u4e0a\u7684\u89c4\u77e9\u5c31\u6362\u6210\u4e86 WebSocket \u7684:\u901a\u4fe1\u5355\u4f4d\u53d8\u6210\u4e00\u4e2a\u4e2a\u5e27,\u6587\u672c\u3001\u4e8c\u8fdb\u5236\u90fd\u884c;\u53cc\u65b9\u5728\u4efb\u4f55\u65f6\u523b\u90fd\u53ef\u4ee5\u4e3b\u52a8\u53d1\u5e27,\u4e0d\u7528\u7b49\u5bf9\u65b9\u5148\u95ee\u2014\u2014\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4ece&#034;\u4e00\u95ee\u4e00\u7b54&#034;\u53d8\u6210\u4e86\u5e73\u7b49\u5bf9\u8bdd\u3002\u534f\u8bae\u91cc\u8fd8\u6709\u4e13\u95e8\u7684\u5fc3\u8df3\u5e27(ping\/pong)\u7528\u6765\u4fdd\u6d3b:\u957f\u65f6\u95f4\u6ca1\u4eba\u8bf4\u8bdd,\u8fde\u63a5\u4e5f\u4e0d\u4f1a\u88ab\u4e2d\u95f4\u8bbe\u5907\u6084\u6084\u6390\u6389\u3002<\/p>\n<p>\u6709\u4e00\u4e2a\u5bb9\u6613\u88ab\u5ffd\u7565\u7684\u89c4\u5b9a:\u5ba2\u6237\u7aef\u53d1\u51fa\u7684\u5e27\u5fc5\u987b\u505a\u63a9\u7801\u5904\u7406\u3002\u539f\u56e0\u662f\u6d4f\u89c8\u5668\u91cc\u7684\u811a\u672c\u4e0d\u53ef\u4fe1\u2014\u2014\u63a9\u7801\u8ba9\u53d1\u51fa\u7684\u5b57\u8282\u6d41\u5e26\u4e0a\u968f\u673a\u6027,\u9632\u6b62\u6076\u610f\u4ee3\u7801\u7cbe\u5fc3\u6784\u9020\u51fa\u957f\u5f97\u50cf HTTP \u8bf7\u6c42\u7684\u62a5\u6587,\u6c61\u67d3\u94fe\u8def\u4e2d\u95f4\u7684\u7f13\u5b58\u4ee3\u7406\u3002<\/p>\n<p>\u4ee3\u4ef7\u4e5f\u8981\u770b\u6e05:WebSocket \u662f\u72ec\u7acb\u4e8e HTTP \u7684\u4e00\u5957\u534f\u8bae,\u53cd\u5411\u4ee3\u7406\u3001\u8d1f\u8f7d\u5747\u8861\u90fd\u5f97\u8ba4\u5f97\u5b83;\u8fde\u63a5\u5e38\u9a7b,\u5341\u4e07\u767e\u4e07\u7ea7\u7684\u957f\u8fde\u63a5\u5bf9\u670d\u52a1\u5668\u662f\u5b9e\u6253\u5b9e\u7684\u8d1f\u62c5;\u65ad\u7ebf\u91cd\u8fde\u3001\u6d88\u606f\u786e\u8ba4\u8fd9\u4e9b,\u534f\u8bae\u4e0d\u7ba1,\u5e94\u7528\u5c42\u81ea\u5df1\u8865\u3002<\/p>\n<p>\u5b83\u9002\u5408\u7684\u573a\u666f\u56e0\u6b64\u5f88\u6e05\u695a:\u53cc\u5411\u3001\u9ad8\u9891\u3001\u4f4e\u5ef6\u8fdf\u2014\u2014\u804a\u5929\u5ba4\u3001\u534f\u540c\u7f16\u8f91\u3001\u591a\u4eba\u6e38\u620f\u3001\u5b9e\u65f6\u884c\u60c5\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808213241-6a77a079a3a83.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>SSE:\u670d\u52a1\u5668\u5355\u65b9\u9762\u7684&#034;\u957f\u7bc7\u8fde\u8f7d&#034;<\/h3>\n<p>\u5b9e\u9645\u4e0a,\u5f88\u591a&#034;\u63a8\u9001&#034;\u573a\u666f\u5e76\u4e0d\u9700\u8981\u53cc\u5411:\u6d88\u606f\u901a\u77e5\u3001\u4efb\u52a1\u8fdb\u5ea6\u3001\u65e5\u5fd7\u8f93\u51fa\u2026\u2026\u5ba2\u6237\u7aef\u4ece\u5934\u5230\u5c3e\u53ea\u60f3\u5b89\u9759\u5730\u542c\u3002\u4e3a\u8fd9\u79cd\u573a\u666f\u62c9\u4e00\u6761\u53cc\u5411\u4e13\u7ebf,\u6709\u70b9\u6d6a\u8d39\u3002<\/p>\n<p>\u540c\u4e00\u65f6\u671f\u7684 HTML5 \u6807\u51c6\u91cc\u7ed9\u51fa\u4e86\u53e6\u4e00\u4e2a\u7b54\u6848:SSE(Server-Sent Events)\u3002\u505a\u6cd5\u5f88\u76f4\u63a5:\u5ba2\u6237\u7aef\u53d1\u4e00\u4e2a\u666e\u901a\u7684 HTTP \u8bf7\u6c42,\u670d\u52a1\u5668\u56de\u4e00\u4e2a\u666e\u901a\u7684 HTTP \u54cd\u5e94,\u53ea\u662f Content-Type \u662f text\/event-stream,\u7136\u540e\u8fd9\u4e2a\u54cd\u5e94\u4e0d\u7ed3\u675f\u2014\u2014\u670d\u52a1\u5668\u6709\u65b0\u5185\u5bb9,\u5c31\u6309\u683c\u5f0f\u5f80\u91cc\u5199\u4e00\u6bb5:<\/p>\n<p>id: 1<br \/>\ndata: {&#034;text&#034;: &#034;\u4f60&#034;}<\/p>\n<p>id: 2<br \/>\ndata: {&#034;text&#034;: &#034;\u597d&#034;}<\/p>\n<p>\u4e00\u884c\u4e00\u4e2a\u5b57\u6bb5,\u7a7a\u884c\u628a\u4e00\u4e2a\u4e2a\u4e8b\u4ef6\u5206\u9694\u5f00:data \u662f\u5185\u5bb9,id \u662f\u7f16\u53f7,\u8fd8\u53ef\u4ee5\u7528 event \u6307\u5b9a\u4e8b\u4ef6\u7c7b\u578b\u3002\u4e00\u4e2a\u4e8b\u4ef6\u91cc\u5199\u591a\u884c data:,\u6d4f\u89c8\u5668\u4f1a\u7528\u6362\u884c\u7b26\u628a\u5b83\u4eec\u62fc\u6210\u4e00\u6574\u6bb5\u3002<\/p>\n<p>\u89c4\u8303\u5b9a\u4e49\u7684\u5b57\u6bb5\u4e00\u5171\u56db\u4e2a:\u4e0a\u9762\u4e09\u4e2a,\u5916\u52a0\u4e00\u4e2a\u670d\u52a1\u65ad\u7ebf\u91cd\u8fde\u7684 retry;\u5199\u5176\u4ed6\u5b57\u6bb5\u540d,\u6d4f\u89c8\u5668\u4f1a\u76f4\u63a5\u5ffd\u7565\u2014\u2014\u8fd9\u662f\u7ed9\u5c06\u6765\u9884\u7559\u7684\u6269\u5c55\u4f4d\u3002\u5b57\u6bb5\u4e4b\u5916\u8fd8\u6709\u4e00\u79cd\u7279\u6b8a\u7684\u884c:\u4ee5\u5192\u53f7\u5f00\u5934\u7684\u662f\u6ce8\u91ca,\u4e0d\u89e3\u6790\u3001\u4e0d\u89e6\u53d1\u4e8b\u4ef6\u3002\u5b83\u4e0d\u662f\u6446\u8bbe:SSE \u8fde\u63a5\u957f\u65f6\u95f4\u6ca1\u6709\u4e8b\u4ef6,\u53ef\u80fd\u88ab\u94fe\u8def\u4e2d\u95f4\u7684\u4ee3\u7406\u5f53\u6210\u6b7b\u8fde\u63a5\u6390\u6389,\u670d\u52a1\u5668\u6bcf\u9694\u4e00\u9635\u53d1\u4e00\u884c : ping,\u8fde\u63a5\u5c31\u80fd\u4e00\u76f4\u4fdd\u6d3b\u3002<\/p>\n<p>\u670d\u52a1\u5668\u7aef\u5199\u51fa\u8fd9\u6837\u7684\u6d41,\u7528 Python \u53ea\u8981\u4e00\u4e2a\u751f\u6210\u5668(\u5148 pip install fastapi uvicorn):<\/p>\n<p><span class=\"token keyword\">import<\/span> asyncio<br \/>\n<span class=\"token keyword\">import<\/span> json<br \/>\n<span class=\"token keyword\">from<\/span> fastapi <span class=\"token keyword\">import<\/span> FastAPI<br \/>\n<span class=\"token keyword\">from<\/span> fastapi<span class=\"token punctuation\">.<\/span>responses <span class=\"token keyword\">import<\/span> StreamingResponse<\/p>\n<p>app <span class=\"token operator\">&#061;<\/span> FastAPI<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;app<span class=\"token punctuation\">.<\/span>get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/stream&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">stream<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">events<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">yield<\/span> <span class=\"token string\">&#034;retry: 5000\\\\n\\\\n&#034;<\/span>   <span class=\"token comment\"># \u53ef\u9009:\u65ad\u7ebf\u540e 5 \u79d2\u518d\u91cd\u8fde(\u9ed8\u8ba4\u7ea6 3 \u79d2)<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> i<span class=\"token punctuation\">,<\/span> text <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">enumerate<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;\u4f60&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u597d&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;,\u4e16\u754c&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> start<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n            data <span class=\"token operator\">&#061;<\/span> json<span class=\"token punctuation\">.<\/span>dumps<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;text&#034;<\/span><span class=\"token punctuation\">:<\/span> text<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span> ensure_ascii<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">yield<\/span> <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;id: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>i<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">\\\\ndata: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>data<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">\\\\n\\\\n&#034;<\/span><\/span>   <span class=\"token comment\"># \u6bcf\u4e2a\u4e8b\u4ef6\u90fd\u5199\u4e0a\u7f16\u53f7<\/span><br \/>\n            <span class=\"token keyword\">await<\/span> asyncio<span class=\"token punctuation\">.<\/span>sleep<span class=\"token punctuation\">(<\/span><span class=\"token number\">0.5<\/span><span class=\"token punctuation\">)<\/span>   <span class=\"token comment\"># \u6162\u6162\u63a8,\u6a21\u62df\u9010\u5b57\u751f\u6210<\/span><br \/>\n        notice <span class=\"token operator\">&#061;<\/span> json<span class=\"token punctuation\">.<\/span>dumps<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;msg&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;\u63a8\u9001\u7ed3\u675f&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span> ensure_ascii<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">yield<\/span> <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;event: notice\\\\ndata: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>notice<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">\\\\n\\\\n&#034;<\/span><\/span>   <span class=\"token comment\"># \u81ea\u5b9a\u4e49\u4e8b\u4ef6:\u540d\u5b57\u5c31\u662f\u5728\u8fd9\u884c\u8d77\u7684<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> StreamingResponse<span class=\"token punctuation\">(<\/span><br \/>\n        events<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        media_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;text\/event-stream&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token comment\"># \u9632\u6b62 nginx \u628a\u54cd\u5e94\u6512\u5728\u624b\u91cc<\/span><br \/>\n        headers<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;Cache-Control&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;no-cache&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;X-Accel-Buffering&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;no&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u8fd0\u884c:uvicorn main:app<\/span><\/p>\n<p>\u751f\u6210\u5668\u6bcf yield \u4e00\u6b21,\u6d4f\u89c8\u5668\u5c31\u6536\u5230\u4e00\u4e2a\u4e8b\u4ef6;\u4ee3\u7801\u91cc\u4ece\u5934\u5230\u5c3e\u6ca1\u51fa\u73b0&#034;\u6d41&#034;\u7684 API,\u4ea7\u51fa\u7684\u5c31\u662f\u4e0a\u9762\u90a3\u6bb5\u683c\u5f0f\u3002\u4e8b\u4ef6\u7684\u7f16\u53f7\u540c\u6837\u6ca1\u6709\u4e13\u95e8\u7684\u8bbe\u7f6e\u63a5\u53e3\u2014\u2014id: {i} \u5c31\u662f\u5199\u8fdb\u4e8b\u4ef6\u6587\u672c\u91cc\u7684\u4e00\u884c,\u6d4f\u89c8\u5668\u6536\u5230\u5e26 id \u7684\u4e8b\u4ef6,\u4f1a\u81ea\u5df1\u8bb0\u4f4f\u8fd9\u4e2a\u7f16\u53f7\u3002\u800c\u4e14\u8fd9\u6bb5\u4ee3\u7801\u662f\u5f02\u6b65\u7684\u2014\u2014\u540c\u65f6\u6302\u51e0\u5343\u6761\u6d41,\u4e5f\u4e0d\u7528\u5f00\u51e0\u5343\u4e2a\u7ebf\u7a0b\u3002\u6d4f\u89c8\u5668\u4fa7\u7684\u4ee3\u7801\u66f4\u77ed:<\/p>\n<p><span class=\"token keyword\">const<\/span> source <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">EventSource<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/stream&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>source<span class=\"token punctuation\">.<\/span><span class=\"token function-variable function\">onmessage<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token parameter\">event<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>event<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>         <span class=\"token comment\">\/\/ {&#034;text&#034;: &#034;\u4f60&#034;}<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>event<span class=\"token punctuation\">.<\/span>lastEventId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ &#034;1&#034;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>source<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;notice&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token parameter\">event<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>event<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>         <span class=\"token comment\">\/\/ {&#034;msg&#034;: &#034;\u63a8\u9001\u7ed3\u675f&#034;}<\/span><br \/>\n  source<span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u6536\u5230\u7ea6\u5b9a\u7684\u6536\u5c3e\u6807\u8bb0,\u4e3b\u52a8\u65ad\u5f00(\u4e0d\u7136\u4f1a\u88ab\u5f53\u6210\u65ad\u7ebf,\u81ea\u52a8\u91cd\u8fde)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u7f51\u7edc\u65ad\u7ebf\u4e0d\u7528\u5199\u4ee3\u7801,\u6d4f\u89c8\u5668\u4f1a\u81ea\u52a8\u91cd\u8fde<\/span><\/p>\n<p>\u4e8b\u4ef6\u7684\u540d\u5b57\u662f\u670d\u52a1\u5668\u5728 event: \u884c\u91cc\u8d77\u7684,\u6d4f\u89c8\u5668\u6309\u8fd9\u4e2a\u540d\u5b57\u5206\u53d1;\u6ca1\u5199 event: \u7684\u4e8b\u4ef6\u4e00\u5f8b\u6309 message \u5904\u7406,\u8d70 onmessage\u3002\u683c\u5f0f\u672c\u8eab\u5e73\u6de1\u65e0\u5947,\u5999\u5904\u8981\u5728\u65ad\u7ebf\u7684\u65f6\u5019\u624d\u663e\u73b0\u51fa\u6765\u3002<\/p>\n<h4>\u65ad\u7ebf\u4e4b\u540e\u600e\u4e48\u63a5\u4e0a:id \u4e0e Last-Event-ID<\/h4>\n<p>\u7f51\u7edc\u6296\u52a8\u3001\u670d\u52a1\u5668\u91cd\u542f,\u957f\u8fde\u63a5\u65ad\u5f00\u662f\u8fdf\u65e9\u7684\u4e8b\u3002EventSource \u7684\u7b2c\u4e00\u53cd\u5e94\u662f\u81ea\u52a8\u91cd\u8fde,\u4e0d\u9700\u8981\u4efb\u4f55\u989d\u5916\u4ee3\u7801;\u4f46\u5b83\u4e0d\u662f\u7b80\u5355\u5730&#034;\u518d\u8fde\u4e00\u6b21&#034;,\u800c\u662f\u80fd\u4ece\u4e2d\u65ad\u7684\u5730\u65b9\u63a5\u7740\u6536\u3002\u9760\u7684\u5c31\u662f\u4e0a\u9762\u7684 id \u5b57\u6bb5\u548c\u4e00\u4e2a\u4e13\u7528\u7684\u8bf7\u6c42\u5934\u3002<\/p>\n<p>\u6d4f\u89c8\u5668\u6bcf\u6536\u5230\u4e00\u4e2a\u5e26 id \u7684\u4e8b\u4ef6,\u5c31\u8bb0\u4f4f\u8fd9\u4e2a\u7f16\u53f7\u3002\u5047\u8bbe\u8fde\u63a5\u5728 2 \u53f7\u4e8b\u4ef6\u4e4b\u540e\u65ad\u4e86:EventSource \u7b49\u5927\u7ea6 3 \u79d2(\u670d\u52a1\u5668\u53ef\u4ee5\u5728\u6d41\u91cc\u5199\u4e00\u884c retry: 5000 \u6539\u6389\u8fd9\u4e2a\u65f6\u957f),\u81ea\u52a8\u91cd\u65b0\u53d1\u8d77\u8bf7\u6c42\u2014\u2014\u8fd9\u6b21\u7684\u8bf7\u6c42\u4f1a\u591a\u5e26\u4e00\u4e2a\u5934\u90e8:<\/p>\n<p>GET \/stream HTTP\/1.1<br \/>\nLast-Event-ID: 2<\/p>\n<p>\u610f\u601d\u662f&#034;\u6211\u6536\u5230 2 \u53f7\u4e86&#034;\u3002\u8fd9\u91cc\u6309 HTTP\/1.1 \u7684\u6587\u672c\u683c\u5f0f\u5199\u51fa\u6765\u662f\u4e3a\u4e86\u597d\u8ba4\u2014\u2014\u5728 HTTP\/2 \u4e0a,\u8bf7\u6c42\u5e76\u6ca1\u6709\u8fd9\u6837\u7684\u6587\u672c\u884c,\u65b9\u6cd5\u548c\u8def\u5f84\u88c5\u8fdb HEADERS \u5e27\u7684 :method\u3001:path \u4f2a\u5934\u90e8,Last-Event-ID \u5219\u539f\u6837\u5e26\u4e0a:\u8fd9\u5957\u673a\u5236\u4e0e HTTP \u7248\u672c\u65e0\u5173\u3002\u670d\u52a1\u5668\u770b\u5230\u8fd9\u4e2a\u5934,\u4ece\u81ea\u5df1\u7559\u5b58\u7684\u6d88\u606f\u8bb0\u5f55\u91cc\u628a 2 \u53f7\u4e4b\u540e\u7684\u4e8b\u4ef6\u8865\u53d1\u4e00\u904d,\u7136\u540e\u63a5\u7740\u63a8\u65b0\u7684:<\/p>\n<p>id: 3<br \/>\ndata: {&#034;text&#034;: &#034;,\u4e16\u754c&#034;}<\/p>\n<p>\u5bf9\u5ba2\u6237\u7aef\u4ee3\u7801\u6765\u8bf4,\u8fd9\u4e00\u5207\u5b8c\u5168\u65e0\u611f,\u5c31\u50cf\u6d41\u4ece\u6765\u6ca1\u6709\u65ad\u8fc7\u3002<\/p>\n<p>\u670d\u52a1\u5668\u7aef\u8981\u505a\u7684\u914d\u5408,\u53ea\u662f\u5f00\u5934\u770b\u4e00\u773c\u90a3\u4e2a\u5934:<\/p>\n<p><span class=\"token keyword\">from<\/span> fastapi <span class=\"token keyword\">import<\/span> Request<\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;app<span class=\"token punctuation\">.<\/span>get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/stream&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">stream<\/span><span class=\"token punctuation\">(<\/span>request<span class=\"token punctuation\">:<\/span> Request<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    last_id <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">(<\/span>request<span class=\"token punctuation\">.<\/span>headers<span class=\"token punctuation\">.<\/span>get<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;last-event-id&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>   <span class=\"token comment\"># \u9996\u6b21\u8bf7\u6c42\u6ca1\u6709,\u6309 0 \u7b97<\/span><br \/>\n    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">events<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> i<span class=\"token punctuation\">,<\/span> text <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">enumerate<\/span><span class=\"token punctuation\">(<\/span>messages<span class=\"token punctuation\">,<\/span> start<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> i <span class=\"token operator\">&lt;&#061;<\/span> last_id<span class=\"token punctuation\">:<\/span><br \/>\n                <span class=\"token keyword\">continue<\/span>   <span class=\"token comment\"># \u65ad\u7ebf\u91cd\u8fde:\u8df3\u8fc7\u5bf9\u65b9\u5df2\u7ecf\u6536\u5230\u7684<\/span><br \/>\n            data <span class=\"token operator\">&#061;<\/span> json<span class=\"token punctuation\">.<\/span>dumps<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;text&#034;<\/span><span class=\"token punctuation\">:<\/span> text<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span> ensure_ascii<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">yield<\/span> <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;id: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>i<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">\\\\ndata: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>data<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">\\\\n\\\\n&#034;<\/span><\/span>   <span class=\"token comment\"># \u7f16\u53f7\u7167\u5e38\u5199\u4e0a<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> StreamingResponse<span class=\"token punctuation\">(<\/span>events<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> media_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;text\/event-stream&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u771f\u5b9e\u5b9e\u73b0\u91cc,messages \u4f1a\u6362\u6210\u6d88\u606f\u65e5\u5fd7\u6216\u961f\u5217\u7684\u6e38\u6807,\u610f\u601d\u4e0d\u53d8\u3002<\/p>\n<p>\u8fd9\u5957\u673a\u5236\u6709\u51e0\u4e2a\u8fb9\u754c,\u7528\u7684\u65f6\u5019\u5fc3\u91cc\u8981\u6709\u6570:<\/p>\n<ul>\n<li>\u8865\u53d1\u80fd\u529b\u5728\u670d\u52a1\u5668\u624b\u91cc:\u670d\u52a1\u5668\u8981\u628a\u6700\u8fd1\u7684\u4e8b\u4ef6\u7559\u4e00\u4efd(\u901a\u5e38\u662f\u5185\u5b58\u91cc\u7684\u4e00\u6bb5\u7a97\u53e3),\u624d\u80fd\u54cd\u5e94 Last-Event-ID\u3002\u5ba2\u6237\u7aef\u65ad\u5f97\u592a\u4e45\u3001id \u5df2\u7ecf\u6ed1\u51fa\u7a97\u53e3,\u670d\u52a1\u5668\u5c31\u4ece\u6700\u65b0\u7684\u5185\u5bb9\u63a5\u7740\u63a8\u2014\u2014\u65ad\u70b9\u7eed\u4f20\u4fdd\u8bc1\u7684\u662f&#034;\u5c3d\u91cf\u63a5\u4e0a&#034;,\u4e0d\u662f\u6d88\u606f\u961f\u5217\u5f0f\u7684\u53ef\u9760\u6295\u9012\u3002<\/li>\n<li>id \u53ea\u5728\u9875\u9762\u5b58\u6d3b\u671f\u5185\u6709\u6548:\u6700\u540e\u6536\u5230\u7684 id \u5b58\u5728 EventSource \u5bf9\u8c61\u91cc,\u5237\u65b0\u9875\u9762\u5c31\u6e05\u96f6,\u91cd\u65b0\u6253\u5f00\u662f\u4e00\u4e2a\u5168\u65b0\u7684\u6d41\u3002<\/li>\n<li>\u6ca1\u6536\u5230\u8fc7 id,\u5c31\u6ca1\u6709\u8fd9\u4e2a\u5934:\u6d41\u91cc\u4e00\u76f4\u6ca1\u51fa\u73b0 id \u5b57\u6bb5\u65f6,\u91cd\u8fde\u8bf7\u6c42\u91cc\u4e5f\u4e0d\u4f1a\u6709 Last-Event-ID;\u53cd\u8fc7\u6765,\u4e0d\u5e26 id \u7684\u4e8b\u4ef6\u4e5f\u4e0d\u4f1a\u51b2\u6389\u6d4f\u89c8\u5668\u5df2\u7ecf\u8bb0\u4f4f\u7684\u7f16\u53f7\u3002<\/li>\n<li>\u670d\u52a1\u5668\u6709\u529e\u6cd5\u8ba9\u5ba2\u6237\u7aef\u505c\u4e0b\u6765:\u54cd\u5e94\u4e00\u4e2a 204 No Content,EventSource \u6536\u5230\u540e\u5c31\u4e0d\u518d\u91cd\u8fde\u2014\u2014\u8fd9\u662f\u89c4\u8303\u91cc\u552f\u4e00\u7684&#034;\u505c\u6b62&#034;\u4fe1\u53f7\u3002<\/li>\n<\/ul>\n<h4>\u4e00\u6761\u8fde\u63a5&#xff0c;\u4e0a\u767e\u6761\u6d41&#xff1a;SSE \u600e\u4e48\u8dd1\u5728 HTTP\/2 \u4e0a<\/h4>\n<p>SSE \u7684\u54cd\u5e94\u201c\u6c38\u4e0d\u7ed3\u675f\u201d&#xff0c;\u800c HTTP\/1.1 \u91cc\u4e00\u6761 TCP \u8fde\u63a5\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u670d\u52a1\u4e00\u4e2a\u8bf7\u6c42-\u54cd\u5e94\u2014\u2014\u54cd\u5e94\u4e0d\u7ed3\u675f&#xff0c;\u8fde\u63a5\u5c31\u4e00\u76f4\u88ab\u5360\u7740\u3002\u5f00\u51e0\u6761 SSE \u5c31\u5360\u51e0\u6761\u8fde\u63a5&#xff1b;\u6d4f\u89c8\u5668\u7ed9\u6bcf\u4e2a\u57df\u540d\u53ea\u7559 6 \u6761\u5de6\u53f3\u7684\u8fde\u63a5\u989d\u5ea6&#xff0c;\u4e00\u65e6\u5360\u6ee1&#xff0c;\u8fd9\u4e2a\u57df\u540d\u4e0b\u7684\u666e\u901a\u8bf7\u6c42\u4e5f\u53ea\u80fd\u6392\u961f\u3002\u542c\u4e0a\u53bb SSE \u548c\u6d4f\u89c8\u5668\u5929\u751f\u72af\u51b2&#xff0c;\u4f46\u73b0\u5b9e\u4e2d\u8fd9\u4e2a\u95ee\u9898\u51e0\u4e4e\u4e0d\u5b58\u5728&#xff0c;\u56e0\u4e3a\u4eca\u5929\u7684 SSE \u5927\u591a\u8dd1\u5728 HTTP\/2 \u4e0a\u3002<\/p>\n<p>HTTP\/2 \u6362\u4e86\u4e00\u5957\u73a9\u6cd5&#xff1a;\u4e00\u6761 TCP \u8fde\u63a5\u91cc\u5212\u51fa\u8bb8\u591a\u6761\u903b\u8f91\u4e0a\u7684\u201c\u6d41\u201d\u3002\u6bcf\u4e2a\u8bf7\u6c42-\u54cd\u5e94\u5360\u4e00\u6761\u6d41,\u6570\u636e\u88ab\u5207\u6210\u5e26\u6d41\u7f16\u53f7\u7684\u5e27,\u591a\u6761\u6d41\u7684\u5e27\u5728\u8fde\u63a5\u91cc\u4ea4\u9519\u4f20\u8f93\u3001\u4e92\u4e0d\u963b\u585e,\u63a5\u6536\u65b9\u6309\u7f16\u53f7\u628a\u5e27\u5f52\u4f4d\u3002SSE \u54cd\u5e94\u53ea\u662f\u5176\u4e2d\u4e00\u6761\u8fdf\u8fdf\u4e0d\u53d1&#034;\u7ed3\u675f&#034;\u6807\u5fd7\u7684\u6d41\u2014\u2014\u5b83\u6302\u591a\u4e45\u90fd\u884c,\u540c\u57df\u540d\u7684\u5176\u4ed6\u8bf7\u6c42\u7167\u5e38\u5728\u522b\u7684\u6d41\u4e0a\u8dd1\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808213242-6a77a07a013e9.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u5e76\u53d1\u80fd\u529b\u7684\u53e3\u5f84\u4e5f\u968f\u4e4b\u6539\u53d8:HTTP\/1.1 \u6570\u7684\u662f\u8fde\u63a5(6 \u6761),HTTP\/2 \u6570\u7684\u662f\u6d41\u2014\u2014\u670d\u52a1\u5668\u5728\u63e1\u624b\u65f6\u901a\u8fc7 SETTINGS \u5e27\u5ba3\u544a\u6bcf\u6761\u8fde\u63a5\u7684\u6700\u5927\u5e76\u53d1\u6d41\u6570,\u5e38\u89c1\u914d\u7f6e\u662f\u4e0a\u767e\u6761\u3002\u4e00\u4e2a\u6807\u7b7e\u9875\u540c\u65f6\u6302\u51e0\u5341\u6761 SSE,\u5bf9\u6d4f\u89c8\u5668\u6765\u8bf4\u4ecd\u7136\u53ea\u662f\u4e00\u6761 TCP \u8fde\u63a5\u7684\u4e8b\u3002<\/p>\n<p>\u60f3\u4eb2\u773c\u786e\u8ba4\u5f88\u7b80\u5355:\u6253\u5f00\u6d4f\u89c8\u5668\u5f00\u53d1\u8005\u5de5\u5177\u7684 Network \u9762\u677f,\u628a Protocol \u5217\u8c03\u51fa\u6765\u2014\u2014\u8fd9\u4e00\u5217\u91cc\u7684 h2 \u5c31\u662f HTTP\/2 \u7684\u534f\u8bae\u4ee3\u53f7\u3002\u663e\u793a h2 \u7684\u7ad9\u70b9,\u6240\u6709\u8bf7\u6c42(\u5305\u62ec SSE)\u90fd\u590d\u7528\u5728\u540c\u4e00\u6761\u8fde\u63a5\u4e0a\u3002api.openai.com \u548c api.anthropic.com,\u663e\u793a\u7684\u90fd\u662f h2\u3002<\/p>\n<p>\u81ea\u5df1\u7684\u670d\u52a1\u8981\u600e\u4e48\u5f00 HTTP\/2?\u6709\u4e2a\u53cd\u76f4\u89c9\u7684\u70b9:\u8fd9\u4e8b\u901a\u5e38\u8f6e\u4e0d\u5230\u5e94\u7528\u6846\u67b6\u64cd\u5fc3\u3002\u6d4f\u89c8\u5668\u53ea\u5728 TLS \u4e0a\u534f\u5546 HTTP\/2(\u63e1\u624b\u65f6\u901a\u8fc7 ALPN \u6269\u5c55\u9009\u5b9a\u534f\u8bae),\u6240\u4ee5\u524d\u63d0\u662f\u6709 HTTPS;\u5269\u4e0b\u7684\u4ea4\u7ed9\u524d\u9762\u7684\u53cd\u5411\u4ee3\u7406\u6216 CDN\u2014\u2014nginx \u5728 listen 443 ssl \u4e4b\u5916\u52a0\u4e00\u884c http2 on;(1.25 \u4e4b\u524d\u7684\u5199\u6cd5\u662f listen 443 ssl http2;),Cloudflare \u8fd9\u7c7b CDN \u5219\u9ed8\u8ba4\u5f00\u542f\u3002<\/p>\n<p>\u4ee3\u7406\u628a\u6d4f\u89c8\u5668\u90a3\u6761 h2 \u8fde\u63a5\u91cc\u7684\u6d41,\u9010\u6761\u7ffb\u8bd1\u6210\u666e\u901a\u7684 HTTP\/1.1 \u8bf7\u6c42\u8f6c\u53d1\u7ed9\u540e\u7aef,FastAPI \u5e94\u7528\u7ee7\u7eed\u8dd1 1.1 \u5c31\u597d;\u524d\u9762\u793a\u4f8b\u91cc\u7684 X-Accel-Buffering: no,\u9632\u7684\u6b63\u662f\u8fd9\u4e00\u5c42\u7684\u54cd\u5e94\u7f13\u51b2\u3002\u60f3\u8ba9 Python \u670d\u52a1\u81ea\u5df1\u8bf4 h2 \u4e5f\u884c:\u628a uvicorn \u6362\u6210 Hypercorn \u5c31\u53ef\u4ee5\u3002\u4e0d\u8fc7\u751f\u4ea7\u73af\u5883\u7684\u4e3b\u6d41,\u4ecd\u662f&#034;\u53cd\u4ee3\u7ec8\u7ed3 TLS \u548c h2,\u5e94\u7528\u7167\u65e7&#034;\u7684\u67b6\u6784\u3002<\/p>\n<p>HTTP\/3 \u628a\u8fd9\u5957\u601d\u8def\u53c8\u63a8\u8fdb\u4e86\u4e00\u6b65:\u5e95\u5c42\u4ece TCP \u6362\u6210 QUIC,\u591a\u8def\u590d\u7528\u7167\u65e7,\u8fd8\u987a\u5e26\u89e3\u51b3\u4e86 TCP \u5c42\u9762\u7684\u961f\u5934\u963b\u585e\u2014\u2014\u4e00\u6761\u6d41\u4e22\u5305,\u4e0d\u518d\u62d6\u7d2f\u5176\u4ed6\u6d41\u3002<\/p>\n<p>\u8fd9\u91cc\u6709\u4e00\u6bb5\u63d2\u66f2:HTTP\/2 \u5f53\u5e74\u81ea\u5e26\u4e86 Server Push \u529f\u80fd,\u60f3\u8ba9\u670d\u52a1\u5668\u4e3b\u52a8\u628a\u8d44\u6e90\u63a8\u7ed9\u6d4f\u89c8\u5668\u3002\u4f46\u56e0\u4e3a\u7f13\u5b58\u534f\u8c03\u590d\u6742\u3001\u5b9e\u9645\u6536\u76ca\u6709\u9650,Chrome \u5728 2022 \u5e74\u79fb\u9664\u4e86\u5bf9\u5b83\u7684\u652f\u6301,\u8fd9\u4e2a\u529f\u80fd\u5c31\u6b64\u6de1\u51fa\u4e86\u4e3b\u6d41\u3002\u6b63\u5f0f\u7684&#034;\u63a8\u9001&#034;\u6ca1\u7559\u4e0b\u6765,\u53cd\u5012\u662f\u6734\u7d20\u7684 SSE \u4e00\u76f4\u7528\u5230\u4e86\u4eca\u5929\u3002<\/p>\n<h4>\u9650\u5236\u4e0e\u9274\u6743<\/h4>\n<p>SSE \u7684\u9650\u5236\u4e5f\u5199\u5f97\u660e\u660e\u767d\u767d&#xff1a;\u53ea\u80fd\u4ece\u670d\u52a1\u5668\u5f80\u5ba2\u6237\u7aef\u53d1&#xff0c;\u5ba2\u6237\u7aef\u60f3\u56de\u8bdd\u5c31\u53e6\u53d1\u666e\u901a\u8bf7\u6c42&#xff1b;\u53ea\u80fd\u4f20 UTF-8 \u6587\u672c&#xff0c;\u4e8c\u8fdb\u5236\u8981\u81ea\u5df1\u7f16\u7801&#xff1b;\u539f\u751f EventSource \u4e0d\u80fd\u81ea\u5b9a\u4e49\u8bf7\u6c42\u5934&#xff0c;\u9700\u8981\u9274\u6743\u7684\u573a\u666f\u5f97\u6539\u7528 fetch \u624b\u52a8\u89e3\u6790\u6570\u636e\u6d41&#xff1a;<\/p>\n<p><span class=\"token keyword\">const<\/span> resp <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> <span class=\"token function\">fetch<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/v1\/chat\/completions&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token literal-property property\">method<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;POST&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token literal-property property\">headers<\/span><span class=\"token operator\">:<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token literal-property property\">Authorization<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;Bearer &#034;<\/span> <span class=\"token operator\">&#043;<\/span> apiKey<span class=\"token punctuation\">,<\/span>     <span class=\"token comment\">\/\/ OpenAI \u7684 API key \u5c31\u653e\u5728\u8fd9\u91cc<\/span><br \/>\n    <span class=\"token string-property property\">&#034;Content-Type&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;application\/json&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token literal-property property\">body<\/span><span class=\"token operator\">:<\/span> <span class=\"token constant\">JSON<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">stringify<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">stream<\/span><span class=\"token operator\">:<\/span> <span class=\"token boolean\">true<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token comment\">\/\/ \u8bf7\u6c42\u4f53\u4e5f\u662f EventSource \u7ed9\u4e0d\u4e86\u7684<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> reader <span class=\"token operator\">&#061;<\/span> resp<span class=\"token punctuation\">.<\/span>body<span class=\"token punctuation\">.<\/span><span class=\"token function\">getReader<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> decoder <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">TextDecoder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span> value<span class=\"token punctuation\">,<\/span> done <span class=\"token punctuation\">}<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> reader<span class=\"token punctuation\">.<\/span><span class=\"token function\">read<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>done<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token keyword\">const<\/span> chunk <span class=\"token operator\">&#061;<\/span> decoder<span class=\"token punctuation\">.<\/span><span class=\"token function\">decode<\/span><span class=\"token punctuation\">(<\/span>value<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token literal-property property\">stream<\/span><span class=\"token operator\">:<\/span> <span class=\"token boolean\">true<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token comment\">\/\/ \u6309\u7a7a\u884c\u5207\u51fa\u4e8b\u4ef6,\u518d\u9010\u884c\u89e3\u6790 data:\u3001id:<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>OpenAI \u7684\u6d41\u5f0f\u63a5\u53e3\u6b63\u597d\u662f\u8fd9\u4e2a\u7ec4\u5408&#xff1a;POST\u3001Bearer \u5934\u3001\u8bf7\u6c42\u4f53&#xff0c;\u4e09\u6837 EventSource \u90fd\u7ed9\u4e0d\u4e86&#xff0c;\u6240\u4ee5\u5b83\u7684\u5b98\u65b9 SDK \u5185\u90e8\u5c31\u662f\u7528 fetch \u8bfb\u6d41\u3001\u81ea\u5df1\u6309 SSE \u683c\u5f0f\u9010\u884c\u89e3\u6790\u3002\u81ea\u5df1\u89e3\u6790\u610f\u5473\u7740 event \u5206\u53d1\u3001\u81ea\u52a8\u91cd\u8fde\u3001Last-Event-ID \u8fd9\u4e9b\u4fbf\u5229\u4e5f\u5f97\u81ea\u5df1\u8865\u2014\u2014\u8fd9\u4e5f\u662f\u5927\u591a\u6570\u573a\u666f\u4ecd\u7136\u9996\u9009 EventSource \u7684\u539f\u56e0\u3002\u8fd8\u6709\u4e00\u4e2a\u73b0\u5b9e\u7ea6\u675f&#xff1a;API key \u5199\u8fdb\u6d4f\u89c8\u5668\u4ee3\u7801\u7b49\u4e8e\u516c\u5f00&#xff0c;\u751f\u4ea7\u73af\u5883\u901a\u5e38\u662f\u6d4f\u89c8\u5668\u8fde\u81ea\u5bb6\u540e\u7aef\u2014\u2014\u81ea\u5bb6\u63a5\u53e3\u53ef\u4ee5\u7528 cookie \u9274\u6743\u52a0 GET&#xff0c;EventSource \u5c31\u591f\u7528\u4e86\u2014\u2014\u518d\u7531\u540e\u7aef\u5e26\u7740 key \u53bb\u8c03 OpenAI\u3002<\/p>\n<p>\u5982\u679c\u81ea\u5bb6\u540e\u7aef\u4e5f\u4e0d\u60f3\u7528 cookie&#xff0c;\u8fd8\u6709\u4e00\u6761\u5077\u61d2\u7684\u8def&#xff1a;\u628a token \u62fc\u8fdb URL\u2014\u2014new EventSource(&#034;\/stream?token&#061;\u2026&#034;)&#xff0c;\u670d\u52a1\u5668\u4ece\u67e5\u8be2\u53c2\u6570\u91cc\u8bfb\u3002\u80fd\u8dd1&#xff0c;\u4f46\u4ee3\u4ef7\u8981\u6e05\u695a&#xff1a;URL \u4f1a\u8d70\u8fdb\u4ee3\u7406\u548c\u670d\u52a1\u5668\u7684\u8bbf\u95ee\u65e5\u5fd7\u3001\u76d1\u63a7\u548c\u62a5\u9519\u7cfb\u7edf&#xff0c;\u660e\u6587\u51ed\u8bc1\u5230\u5904\u7559\u75d5&#xff08;OpenAI \u5b98\u65b9\u63a5\u53e3\u4e5f\u4e0d\u652f\u6301\u8fd9\u79cd\u4f20\u6cd5&#xff0c;\u5b83\u53ea\u8ba4 Authorization \u5934&#xff09;\u3002\u7a33\u59a5\u4e00\u70b9\u7684\u505a\u6cd5\u662f\u5148\u62ff\u771f\u51ed\u8bc1\u6362\u4e00\u5f20\u77ed\u65f6\u6548\u7684\u4e00\u6b21\u6027\u95e8\u7968&#xff0c;\u518d\u5e26\u7740\u95e8\u7968\u5f00\u6d41\u2014\u2014\u5c31\u7b97\u7559\u4e86\u75d5&#xff0c;\u6cc4\u9732\u7a97\u53e3\u4e5f\u53ea\u6709\u95e8\u7968\u7684\u6709\u6548\u671f\u3002<\/p>\n<h4>\u6027\u80fd\u4e0e\u8fb9\u754c\u6761\u4ef6<\/h4>\n<p>\u628a SSE \u63a5\u8fdb\u751f\u4ea7\u73af\u5883\u4e4b\u524d&#xff0c;\u6709\u51e0\u4e2a\u6570\u5b57\u548c\u5751\u503c\u5f97\u5148\u5fc3\u91cc\u6709\u6570&#xff1a;\u6d4f\u89c8\u5668\u5230\u5e95\u5141\u8bb8\u6302\u591a\u5c11\u6761\u8fde\u63a5\u3001\u670d\u52a1\u5668\u625b\u4f4f\u5927\u91cf\u957f\u8fde\u63a5\u8981\u82b1\u591a\u5c11\u8d44\u6e90\u3001\u6d88\u606f\u63a8\u4e0d\u8fc7\u6765\u65f6\u600e\u4e48\u529e&#xff0c;\u4ee5\u53ca\u4e2d\u95f4\u90a3\u5c42\u4ee3\u7406\u548c CDN \u4f1a\u4e0d\u4f1a\u6084\u6084\u4f7f\u7eca\u5b50\u3002<\/p>\n<p>\u6d4f\u89c8\u5668\u5e76\u53d1\u8fde\u63a5\u6570:HTTP\/1.1 \u4e0e HTTP\/2 \u7684\u5dee\u522b<\/p>\n<p>\u6d4f\u89c8\u5668\u5bf9 SSE \u7684\u5e76\u53d1\u9650\u5236,\u672c\u8d28\u4e0a\u662f&#034;\u6bcf\u4e2a\u57df\u540d\u80fd\u5f00\u591a\u5c11\u6761\u8fde\u63a5&#034;\u7684\u9650\u5236\u3002HTTP\/1.1 \u65f6\u4ee3&#xff0c;\u4e00\u6761 TCP \u8fde\u63a5\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u670d\u52a1\u4e00\u4e2a\u8bf7\u6c42-\u54cd\u5e94&#xff0c;\u800c SSE \u7684\u54cd\u5e94\u6c38\u4e0d\u7ed3\u675f&#xff0c;\u6240\u4ee5\u6bcf\u6761 SSE \u90fd\u8981\u72ec\u5360\u4e00\u6761\u8fde\u63a5\u3002\u6d4f\u89c8\u5668\u7ed9\u6bcf\u4e2a\u57df\u540d\u53ea\u7559 6 \u6761\u5de6\u53f3\u7684\u8fde\u63a5\u989d\u5ea6&#xff0c;\u4e00\u65e6 SSE \u5360\u6ee1&#xff0c;\u540c\u57df\u540d\u4e0b\u7684\u666e\u901a\u8bf7\u6c42\u4e5f\u53ea\u80fd\u6392\u961f\u3002\u8fd9\u610f\u5473\u7740\u5728 HTTP\/1.1 \u4e0b&#xff0c;\u4e00\u4e2a\u9875\u9762\u540c\u65f6\u5f00 6 \u6761 SSE \u5c31\u662f\u4e0a\u9650&#xff0c;\u518d\u591a\u5c31\u5f97\u6362\u57df\u540d\u6216\u7528\u5b50\u57df\u540d\u6765\u201c\u6269\u5bb9\u201d\u3002<\/p>\n<p>HTTP\/2 \u628a\u53e3\u5f84\u4ece&#034;\u8fde\u63a5&#034;\u6362\u6210\u4e86&#034;\u6d41&#034;:\u4e00\u6761 TCP \u8fde\u63a5\u91cc\u53ef\u4ee5\u5212\u51fa\u4e0a\u767e\u6761\u903b\u8f91\u6d41,SSE \u53ea\u662f\u5176\u4e2d\u4e00\u6761\u8fdf\u8fdf\u4e0d\u53d1\u7ed3\u675f\u6807\u5fd7\u7684\u6d41\u3002\u4e8e\u662f\u5e76\u53d1\u4e0a\u9650\u4ece 6 \u6761\u8fde\u63a5\u53d8\u6210\u4e86\u4e0a\u767e\u6761\u6d41\u2014\u2014\u4e00\u4e2a\u6807\u7b7e\u9875\u540c\u65f6\u6302\u51e0\u5341\u6761 SSE \u5bf9\u6d4f\u89c8\u5668\u6765\u8bf4\u4ecd\u7136\u53ea\u662f\u4e00\u6761 TCP \u8fde\u63a5\u7684\u4e8b\u3002\u8fd9\u4e5f\u662f\u4eca\u5929 SSE \u5927\u591a\u8dd1\u5728 HTTP\/2 \u4e0a\u7684\u6839\u672c\u539f\u56e0:\u4e0d\u662f\u534f\u8bae\u672c\u8eab\u53d8\u4e86,\u800c\u662f\u591a\u8def\u590d\u7528\u628a\u5e76\u53d1\u5929\u82b1\u677f\u62ac\u9ad8\u4e86\u4e24\u4e2a\u6570\u91cf\u7ea7\u3002<\/p>\n<p>\u670d\u52a1\u5668\u7aef\u7ef4\u6301\u5927\u91cf\u957f\u8fde\u63a5\u7684\u5f00\u9500\u4f30\u7b97<\/p>\n<p>SSE \u957f\u8fde\u63a5\u5bf9\u670d\u52a1\u5668\u6700\u76f4\u89c2\u7684\u6d88\u8017\u662f\u6587\u4ef6\u63cf\u8ff0\u7b26:\u6bcf\u4e00\u6761\u8fde\u63a5\u90fd\u8981\u5360\u4e00\u4e2a socket,\u4e5f\u5c31\u662f\u4e00\u4e2a fd\u3002Linux \u9ed8\u8ba4\u7684 ulimit -n \u901a\u5e38\u662f 1024,\u751f\u4ea7\u73af\u5883\u4e00\u822c\u4f1a\u8c03\u5230\u51e0\u4e07\u751a\u81f3\u51e0\u5341\u4e07,\u5426\u5219\u8fde\u63a5\u6570\u4e00\u4e0a\u6765,\u6700\u5148\u7206\u6389\u7684\u5c31\u662f\u8fd9\u4e2a\u3002\u5185\u5b58\u65b9\u9762,\u6bcf\u6761\u7a7a\u95f2\u8fde\u63a5\u7684\u5185\u6838\u7f13\u51b2\u533a\u52a0\u5e94\u7528\u5c42\u5bf9\u8c61,\u901a\u5e38\u53ea\u6709\u51e0\u5341 KB \u7684\u91cf\u7ea7\u2014\u2014\u4e00\u4e07\u6761\u8fde\u63a5\u5927\u7ea6\u51e0\u767e MB \u5185\u5b58,\u5bf9\u73b0\u4ee3\u670d\u52a1\u5668\u4e0d\u7b97\u5938\u5f20\u3002\u771f\u6b63\u7684\u6210\u672c\u5728\u522b\u5904:<\/p>\n<ul>\n<li>\u7ebf\u7a0b\u6a21\u578b:\u5982\u679c\u7528&#034;\u4e00\u8fde\u63a5\u4e00\u7ebf\u7a0b&#034;\u7684\u540c\u6b65\u6a21\u578b,\u4e00\u4e07\u6761\u8fde\u63a5\u5c31\u662f\u4e00\u4e07\u4e2a\u7ebf\u7a0b,\u5149\u662f\u7ebf\u7a0b\u6808(\u9ed8\u8ba4 8 MB \u865a\u62df\u5185\u5b58)\u5c31\u591f\u545b\u3002\u6240\u4ee5 SSE \u670d\u52a1\u7aef\u51e0\u4e4e\u5fc5\u987b\u8d70\u5f02\u6b65\/\u4e8b\u4ef6\u9a71\u52a8\u6a21\u578b\u2014\u2014\u524d\u9762\u793a\u4f8b\u91cc\u7684 FastAPI \u751f\u6210\u5668\u5c31\u662f\u5f02\u6b65\u7684,\u540c\u65f6\u6302\u51e0\u5343\u6761\u6d41\u4e5f\u4e0d\u7528\u5f00\u51e0\u5343\u4e2a\u7ebf\u7a0b\u3002<\/li>\n<li>\u5fc3\u8df3\u4e0e\u4fdd\u6d3b:\u957f\u65f6\u95f4\u6ca1\u6709\u4e8b\u4ef6,\u8fde\u63a5\u53ef\u80fd\u88ab\u4e2d\u95f4\u8bbe\u5907\u6390\u6389\u3002\u670d\u52a1\u5668\u8981\u5b9a\u671f\u53d1 : ping \u6ce8\u91ca\u884c\u4fdd\u6d3b,\u8fd9\u672c\u8eab\u662f\u6301\u7eed\u7684 CPU \u548c\u5e26\u5bbd\u5f00\u9500,\u8fde\u63a5\u8d8a\u591a\u8d8a\u660e\u663e\u3002<\/li>\n<li>\u4e8b\u4ef6\u5206\u53d1:\u63a8\u9001\u4e00\u6761\u6d88\u606f\u7ed9\u4e00\u4e07\u4e2a\u8ba2\u9605\u8005,\u5c31\u662f\u4e00\u4e07\u6b21\u5199\u64cd\u4f5c\u3002\u5982\u679c\u6bcf\u6761\u6d88\u606f\u90fd\u8981\u904d\u5386\u4e00\u904d\u8ba2\u9605\u8868\u3001\u9010\u8fde\u63a5\u5199\u7f13\u51b2,CPU \u4f1a\u968f\u8ba2\u9605\u6570\u7ebf\u6027\u589e\u957f\u3002\u5e38\u89c1\u7684\u4f18\u5316\u662f\u628a\u8ba2\u9605\u8005\u6309\u8fde\u63a5\u5206\u7ec4\u3001\u6279\u91cf\u5199,\u6216\u8005\u7528\u53d1\u5e03-\u8ba2\u9605\u4e2d\u95f4\u4ef6\u628a\u63a8\u9001\u538b\u529b\u5206\u644a\u51fa\u53bb\u3002<\/li>\n<\/ul>\n<p>\u6d88\u606f\u79ef\u538b\u4e0e\u80cc\u538b\u5904\u7406<\/p>\n<p>SSE \u662f&#034;\u670d\u52a1\u5668\u63a8\u3001\u5ba2\u6237\u7aef\u6536&#034;,\u6ca1\u6709\u5ba2\u6237\u7aef\u4e3b\u52a8\u786e\u8ba4\u7684\u673a\u5236\u3002\u5982\u679c\u751f\u4ea7\u901f\u5ea6\u8d85\u8fc7\u6d88\u8d39\u901f\u5ea6,\u6d88\u606f\u5c31\u4f1a\u5728\u670d\u52a1\u5668\u7aef\u7684\u53d1\u9001\u7f13\u51b2\u533a\u91cc\u79ef\u538b\u3002\u7f13\u51b2\u533a\u5199\u6ee1\u4e4b\u540e,\u5199\u64cd\u4f5c\u4f1a\u963b\u585e\u6216\u62a5\u9519\u2014\u2014\u8fd9\u5c31\u662f\u80cc\u538b(backpressure)\u4fe1\u53f7,\u5904\u7406\u4e0d\u597d,\u8f7b\u5219\u5185\u5b58\u66b4\u6da8,\u91cd\u5219\u62d6\u57ae\u6574\u4e2a\u8fdb\u7a0b\u3002<\/p>\n<p>\u5e94\u5bf9\u601d\u8def\u5927\u81f4\u6709\u4e09\u5c42:<\/p>\n<ul>\n<li>\u9650\u6d41\u4e0e\u4e22\u5f03:\u5bf9\u5b9e\u65f6\u6027\u8981\u6c42\u4e0d\u9ad8\u7684\u573a\u666f(\u5982\u884c\u60c5\u5feb\u7167),\u53ef\u4ee5\u53ea\u4fdd\u7559\u6700\u65b0\u72b6\u6001,\u4e22\u5f03\u4e2d\u95f4\u8fc7\u7a0b\u2014\u2014\u5ba2\u6237\u7aef\u4e0b\u6b21\u6536\u5230\u7684\u662f\u6700\u65b0\u503c,\u800c\u4e0d\u662f\u79ef\u538b\u7684\u5386\u53f2\u3002\u8fd9\u8ddf&#034;\u65ad\u70b9\u7eed\u4f20\u4fdd\u8bc1\u5c3d\u91cf\u63a5\u4e0a&#034;\u662f\u540c\u4e00\u4e2a\u54f2\u5b66:SSE \u4e0d\u662f\u53ef\u9760\u6d88\u606f\u961f\u5217\u3002<\/li>\n<li>\u961f\u5217\u524a\u5cf0:\u628a\u8981\u63a8\u9001\u7684\u6d88\u606f\u5148\u653e\u8fdb\u961f\u5217,\u7531\u72ec\u7acb\u7684\u6d88\u8d39\u8005\u6309\u8282\u594f\u5199\u6d41\u3002\u961f\u5217\u672c\u8eab\u8981\u6709\u957f\u5ea6\u4e0a\u9650,\u6ee1\u4e86\u5c31\u6309\u7b56\u7565\u4e22\u5f03\u6216\u964d\u7ea7,\u907f\u514d\u65e0\u754c\u79ef\u538b\u62d6\u57ae\u5185\u5b58\u3002<\/li>\n<li>\u611f\u77e5\u5ba2\u6237\u7aef\u72b6\u6001:\u5ba2\u6237\u7aef\u65ad\u7ebf\u3001\u9875\u9762\u4e0d\u53ef\u89c1\u65f6,\u63a8\u9001\u5176\u5b9e\u662f\u5728\u505a\u65e0\u7528\u529f\u3002\u53ef\u4ee5\u5728\u5e94\u7528\u5c42\u8ddf\u8e2a\u8fde\u63a5\u72b6\u6001,\u5bf9\u957f\u65f6\u95f4\u4e0d\u6d3b\u8dc3\u7684\u8fde\u63a5\u4e3b\u52a8\u65ad\u5f00,\u8ba9 EventSource \u8d70\u81ea\u52a8\u91cd\u8fde,\u800c\u4e0d\u662f\u4e00\u76f4\u5f80\u6b7b\u8fde\u63a5\u91cc\u5199\u3002<\/li>\n<\/ul>\n<p>\u751f\u4ea7\u73af\u5883\u4e2d\u7684\u4ee3\u7406\u3001\u9632\u706b\u5899\u4e0e CDN \u95ee\u9898<\/p>\n<p>SSE \u7684\u54cd\u5e94&#034;\u6c38\u4e0d\u7ed3\u675f&#034;,\u8fd9\u8ddf\u5f88\u591a\u4e2d\u95f4\u4ef6\u7684\u9ed8\u8ba4\u884c\u4e3a\u662f\u51b2\u7a81\u7684,\u5e38\u89c1\u7684\u5751\u548c\u5bf9\u5e94\u89e3\u6cd5:<\/p>\n<ul>\n<li>\u4ee3\u7406\u7f13\u51b2:nginx \u9ed8\u8ba4\u4f1a\u7f13\u51b2\u4e0a\u6e38\u54cd\u5e94,\u6512\u591f\u4e00\u5b9a\u91cf\u624d\u53d1\u7ed9\u5ba2\u6237\u7aef\u2014\u2014\u5bf9 SSE \u6765\u8bf4,\u8fd9\u7b49\u4e8e\u628a\u9010\u5b57\u8f93\u51fa\u53d8\u6210\u4e86&#034;\u618b\u4e00\u5927\u6bb5\u518d\u5410&#034;\u3002\u89e3\u6cd5\u662f\u5728\u54cd\u5e94\u5934\u91cc\u52a0 X-Accel-Buffering: no,\u6216\u8005\u628a proxy_buffering off; \u5199\u8fdb location \u914d\u7f6e\u3002<\/li>\n<li>\u8d85\u65f6\u6390\u65ad:\u4ee3\u7406\u548c\u9632\u706b\u5899\u5bf9\u957f\u65f6\u95f4\u6ca1\u6709\u6570\u636e\u7684\u8fde\u63a5,\u4f1a\u6309\u7a7a\u95f2\u8d85\u65f6\u628a\u5b83\u6390\u6389\u3002\u89e3\u6cd5\u662f\u524d\u9762\u63d0\u5230\u7684 : ping \u6ce8\u91ca\u884c\u2014\u2014\u5b83\u4e0d\u89e6\u53d1\u4e8b\u4ef6,\u4f46\u80fd\u8ba9\u8fde\u63a5\u4e00\u76f4\u6709\u6570\u636e\u6d41\u52a8,\u9a97\u8fc7\u7a7a\u95f2\u68c0\u6d4b\u3002SSE \u89c4\u8303\u91cc\u7684 retry \u5b57\u6bb5\u5219\u63a7\u5236\u65ad\u7ebf\u540e\u591a\u4e45\u91cd\u8fde,\u914d\u5408\u4f7f\u7528\u80fd\u663e\u8457\u51cf\u5c11&#034;\u83ab\u540d\u6389\u7ebf&#034;\u7684\u4f53\u611f\u3002<\/li>\n<li>CDN \u7f13\u5b58:CDN \u9ed8\u8ba4\u4f1a\u7f13\u5b58\u54cd\u5e94,\u800c SSE \u662f\u52a8\u6001\u6d41,\u7f13\u5b58\u4f1a\u8ba9\u6240\u6709\u5ba2\u6237\u7aef\u6536\u5230\u540c\u4e00\u4efd\u8fc7\u671f\u5185\u5bb9\u3002\u5fc5\u987b\u5728\u54cd\u5e94\u91cc\u5e26 Cache-Control: no-cache,\u5e76\u786e\u4fdd CDN \u914d\u7f6e\u4e0d\u7f13\u5b58 text\/event-stream \u7684\u54cd\u5e94\u3002<\/li>\n<li>HTTP\/2 \u4e0e\u4ee3\u7406\u7684\u914d\u5408:\u6d4f\u89c8\u5668\u53ea\u5728 TLS \u4e0a\u534f\u5546 HTTP\/2,\u6240\u4ee5\u524d\u63d0\u662f\u6709 HTTPS\u3002\u751f\u4ea7\u73af\u5883\u901a\u5e38\u662f&#034;\u53cd\u4ee3\u7ec8\u7ed3 TLS \u548c h2,\u5e94\u7528\u7167\u65e7\u8dd1 HTTP\/1.1&#034;\u2014\u2014\u4ee3\u7406\u628a h2 \u8fde\u63a5\u91cc\u7684\u6d41\u9010\u6761\u7ffb\u8bd1\u6210\u666e\u901a\u8bf7\u6c42\u8f6c\u53d1\u7ed9\u540e\u7aef,\u5e94\u7528\u5c42\u4e0d\u7528\u611f\u77e5\u3002\u4f46\u8981\u6ce8\u610f,\u4ee3\u7406\u672c\u8eab\u5fc5\u987b\u652f\u6301\u6d41\u5f0f\u8f6c\u53d1,\u5426\u5219\u5b83\u4f1a\u628a\u54cd\u5e94\u6574\u4e2a\u6512\u5728\u624b\u91cc,SSE \u5c31\u53d8\u6210\u4e86&#034;\u957f\u8f6e\u8be2&#034;\u3002<\/li>\n<\/ul>\n<h4>\u5927\u6a21\u578b\u6d41\u5f0f\u8f93\u51fa&#xff1a;SSE \u6700\u5e7f\u4e3a\u4eba\u77e5\u7684\u7528\u6b66\u4e4b\u5730<\/h4>\n<p>OpenAI \u7684 API \u52a0\u4e0a stream: true&#xff0c;\u8fd4\u56de\u7684\u5c31\u662f text\/event-stream\u2014\u2014\u6a21\u578b\u6bcf\u751f\u6210\u4e00\u5c0f\u6bb5&#xff0c;\u670d\u52a1\u5668\u5c31\u63a8\u4e00\u4e2a data: \u5757\u8fc7\u6765&#xff0c;\u6700\u540e\u4ee5\u4e00\u884c data: [DONE] \u6536\u5c3e&#xff1b;Anthropic \u7684 API \u540c\u7406\u3002<\/p>\n<p>\u4e3a\u4ec0\u4e48\u8981\u4e13\u95e8\u7ea6\u5b9a\u4e00\u884c\u6536\u5c3e&#xff1f;\u56e0\u4e3a EventSource \u62ff\u4e0d\u5230\u201c\u53d1\u5b8c\u4e86\u201d\u8fd9\u4e2a\u4fe1\u53f7\u3002\u54cd\u5e94\u7ed3\u675f\u5728\u4f20\u8f93\u5c42\u5f53\u7136\u6709\u8868\u793a\u2014\u2014HTTP\/1.1 \u662f chunked \u7f16\u7801\u7684\u7ed3\u675f\u5757&#xff0c;HTTP\/2 \u662f\u5e26 END_STREAM \u6807\u5fd7\u7684\u5e27\u2014\u2014\u4f46 EventSource \u6536\u5230\u540e\u53ea\u4f1a\u6309\u65ad\u7ebf\u5904\u7406&#xff1a;\u7b49\u4e0a\u51e0\u79d2&#xff0c;\u81ea\u52a8\u91cd\u8fde\u3002\u5b83\u5206\u4e0d\u6e05\u201c\u670d\u52a1\u5668\u53d1\u5b8c\u4e86\u201d\u548c\u201c\u7f51\u7edc\u65ad\u4e86\u201d&#xff0c;\u4e5f\u6ca1\u6709 oncomplete \u4e4b\u7c7b\u7684\u56de\u8c03\u3002\u6240\u4ee5\u201c\u53d1\u5b8c\u201d\u53ea\u80fd\u9760\u5e94\u7528\u5c42\u81ea\u5df1\u7ea6\u5b9a&#xff1a;\u670d\u52a1\u5668\u6700\u540e\u63a8\u4e00\u884c data: [DONE]&#xff0c;\u5ba2\u6237\u7aef\u5728 onmessage \u91cc\u8ba4\u51fa\u8fd9\u4e00\u884c\u5c31 source.close() \u4e3b\u52a8\u65ad\u5f00&#xff1b;\u4e0d\u8fd9\u4e48\u505a&#xff0c;EventSource \u4f1a\u628a\u7ed3\u675f\u5f53\u6210\u65ad\u7ebf&#xff0c;\u4e00\u904d\u4e00\u904d\u5730\u91cd\u8fde\u3002\u524d\u9762\u793a\u4f8b\u91cc\u90a3\u6761 event: notice&#xff0c;\u4e5f\u662f\u540c\u4e00\u4e2a\u601d\u8def\u3002<\/p>\n<p>204 \u90a3\u4e2a\u201c\u505c\u6b62\u201d\u4fe1\u53f7\u540c\u6837\u5e2e\u4e0d\u4e0a\u5fd9&#xff1a;\u72b6\u6001\u7801\u53ea\u80fd\u5728\u54cd\u5e94\u5f00\u5934\u7ed9&#xff0c;\u7ed3\u675f\u4e0d\u4e86\u4e00\u6761\u6b63\u5728\u63a8\u7684\u6d41\u3002fetch \u624b\u52a8\u89e3\u6790\u7684\u65b9\u6848\u5012\u662f\u6ca1\u6709\u8fd9\u4e2a\u56f0\u6270\u2014\u2014read() \u8fd4\u56de\u7684 done&#xff0c;\u5c31\u662f\u4f20\u8f93\u5c42\u7684\u7ed3\u675f\u4fe1\u53f7\u3002<\/p>\n<p>\u4f60\u5728\u7f51\u9875\u4e0a\u770b\u5230\u7684\u9010\u5b57\u8f93\u51fa&#xff0c;\u8d70\u7684\u5c31\u662f\u8fd9\u6761\u8def\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808213242-6a77a07aa6b50.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>\u4e00\u5f20\u8868\u770b\u6e05\u5206\u5de5<\/h3>\n<table>\n<tr>HTTP(\u8bf7\u6c42-\u54cd\u5e94)WebSocketSSE<\/tr>\n<tbody>\n<tr>\n<td>\u901a\u4fe1\u65b9\u5411<\/td>\n<td>\u5ba2\u6237\u7aef\u95ee,\u670d\u52a1\u5668\u7b54<\/td>\n<td>\u53cc\u5411,\u968f\u65f6\u4e92\u53d1<\/td>\n<td>\u53ea\u4ece\u670d\u52a1\u5668\u5230\u5ba2\u6237\u7aef<\/td>\n<\/tr>\n<tr>\n<td>\u8fde\u63a5\u5f62\u6001<\/td>\n<td>\u6bcf\u6b21\u95ee\u7b54\u72ec\u7acb,\u8fde\u63a5\u53ef\u590d\u7528<\/td>\n<td>\u4e00\u6b21\u63e1\u624b,\u957f\u8fde\u63a5<\/td>\n<td>\u4e00\u6b21\u8bf7\u6c42,\u54cd\u5e94\u4e0d\u7ed3\u675f<\/td>\n<\/tr>\n<tr>\n<td>\u6570\u636e\u683c\u5f0f<\/td>\n<td>\u4efb\u610f<\/td>\n<td>\u6587\u672c &#043; \u4e8c\u8fdb\u5236\u5e27<\/td>\n<td>\u4ec5 UTF-8 \u6587\u672c<\/td>\n<\/tr>\n<tr>\n<td>\u534f\u8bae\u5f00\u9500<\/td>\n<td>\u6bcf\u6b21\u8bf7\u6c42\u90fd\u5e26\u5b8c\u6574\u5934\u90e8,\u5f00\u9500\u968f\u8bf7\u6c42\u6570\u7ebf\u6027\u589e\u957f<\/td>\n<td>\u63e1\u624b\u540e\u5934\u90e8\u6781\u5c0f,\u5e27\u5f00\u9500\u4f4e,\u4f46\u8fde\u63a5\u5e38\u9a7b\u5360\u8d44\u6e90<\/td>\n<td>\u590d\u7528 HTTP \u5934\u90e8,\u957f\u8fde\u63a5\u4e0b\u644a\u9500\u540e\u5f00\u9500\u5f88\u4f4e<\/td>\n<\/tr>\n<tr>\n<td>\u6d4f\u89c8\u5668\u517c\u5bb9\u6027<\/td>\n<td>\u5168\u5e73\u53f0\u539f\u751f\u652f\u6301<\/td>\n<td>\u5168\u5e73\u53f0\u539f\u751f\u652f\u6301<\/td>\n<td>\u9664 IE\/Edge(\u65e7\u7248)\u5916\u5747\u652f\u6301,\u73b0\u4ee3\u6d4f\u89c8\u5668\u5168\u8986\u76d6<\/td>\n<\/tr>\n<tr>\n<td>\u5178\u578b\u5ef6\u8fdf<\/td>\n<td>\u6beb\u79d2\u7ea7(\u53d7\u7f51\u7edc\u5f80\u8fd4\u5f71\u54cd)<\/td>\n<td>\u4e9a\u6beb\u79d2\u7ea7,\u53cc\u5411\u5b9e\u65f6<\/td>\n<td>\u4e9a\u6beb\u79d2\u7ea7(\u5355\u5411),\u63a8\u9001\u5373\u8fbe<\/td>\n<\/tr>\n<tr>\n<td>\u65ad\u7ebf\u91cd\u8fde<\/td>\n<td>\u4e0d\u6d89\u53ca<\/td>\n<td>\u9700\u5e94\u7528\u81ea\u5df1\u5b9e\u73b0<\/td>\n<td>\u6d4f\u89c8\u5668\u5185\u7f6e,\u65ad\u70b9\u7eed\u4f20<\/td>\n<\/tr>\n<tr>\n<td>\u57fa\u7840\u8bbe\u65bd<\/td>\n<td>\u6700\u666e\u9002<\/td>\n<td>\u4ee3\u7406\u3001\u7f51\u5173\u9700\u652f\u6301 Upgrade<\/td>\n<td>\u5c31\u662f HTTP,\u5929\u7136\u517c\u5bb9<\/td>\n<\/tr>\n<tr>\n<td>\u9002\u7528\u573a\u666f\u7ec6\u5206<\/td>\n<td>\u7f51\u9875\u3001\u8868\u5355\u3001REST API\u3001\u9759\u6001\u8d44\u6e90<\/td>\n<td>\u804a\u5929\u3001\u534f\u540c\u7f16\u8f91\u3001\u591a\u4eba\u6e38\u620f\u3001\u5b9e\u65f6\u884c\u60c5\u3001\u5728\u7ebf\u767d\u677f<\/td>\n<td>\u6d88\u606f\u901a\u77e5\u3001\u4efb\u52a1\u8fdb\u5ea6\u3001\u65e5\u5fd7\u6d41\u3001\u5927\u6a21\u578b\u6d41\u5f0f\u8f93\u51fa\u3001\u884c\u60c5\u63a8\u9001<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u9009\u578b\u5176\u5b9e\u662f\u4e09\u53e5\u8bdd:\u666e\u901a\u7684\u67e5\u6570\u636e\u3001\u63d0\u8868\u5355,\u7528 HTTP \u672c\u8eab;\u53cc\u5411\u9ad8\u9891\u4e92\u52a8,\u4e0a WebSocket;\u53ea\u9700\u8981\u670d\u52a1\u5668\u5355\u65b9\u9762\u63a8,SSE \u6700\u7701\u4e8b\u3002<\/p>\n<h3>\u7ed3\u5c3e<\/h3>\n<p>\u4e09\u79cd\u65b9\u6848\u4e0d\u662f\u8c01\u53d6\u4ee3\u8c01:HTTP \u7684&#034;\u4e00\u95ee\u4e00\u7b54&#034;\u81f3\u4eca\u662f Web \u7684\u57fa\u672c\u76d8,WebSocket \u8865\u4e0a\u4e86\u53cc\u5411\u5b9e\u65f6,SSE \u628a\u5355\u5411\u63a8\u9001\u505a\u5230\u4e86\u6700\u7b80\u2014\u2014\u65ad\u70b9\u7eed\u4f20\u662f\u73b0\u6210\u7684,\u591a\u8def\u590d\u7528\u7531 HTTP\/2 \u987a\u5e26\u63d0\u4f9b\u3002\u8f6e\u8be2\u548c\u957f\u8f6e\u8be2\u4e5f\u6ca1\u6709\u5f7b\u5e95\u6d88\u5931,\u5728\u4e0d\u503c\u5f97\u7ef4\u62a4\u957f\u8fde\u63a5\u7684\u573a\u5408,\u5b83\u4eec\u4ecd\u7136\u662f\u6700\u7b80\u5355\u7684\u89e3\u6cd5\u3002\u6253\u5f00\u4e00\u4e2a\u5927\u6a21\u578b\u5bf9\u8bdd\u6846,\u770b\u7740\u56de\u7b54\u9010\u5b57\u6d41\u51fa\u2014\u2014\u90a3\u6761\u8fde\u63a5,\u5c31\u662f\u8fd9\u6761\u6f14\u8fdb\u7ebf\u4e0a\u6700\u8f7b\u7684\u4e00\u4e2a\u7b54\u6848\u3002<\/p>\n<h3>\u5ef6\u4f38\u9605\u8bfb<\/h3>\n<ul>\n<li>HTML Standard:Server-sent events\u2014\u2014SSE \u4e0e EventSource \u7684\u89c4\u8303\u539f\u6587,\u65ad\u7ebf\u91cd\u8fde\u4e0e Last-Event-ID \u90fd\u5728\u8fd9\u91cc\u5b9a\u4e49<\/li>\n<li>RFC 9113:HTTP\/2\u2014\u2014\u6d41\u3001\u5e27\u4e0e\u591a\u8def\u590d\u7528\u7684\u89c4\u8303<\/li>\n<li>RFC 6455:The WebSocket Protocol\u2014\u2014WebSocket \u7684\u6b63\u5f0f\u6807\u51c6<\/li>\n<li>MDN:Server-sent events\u2014\u2014SSE \u7684\u7528\u6cd5\u624b\u518c<\/li>\n<li>RFC 9110:HTTP Semantics\u2014\u2014HTTP \u8bed\u4e49\u7684\u73b0\u884c\u6807\u51c6<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u548c\u5927\u6a21\u578b\u804a\u5929\u7684\u65f6\u5019&#xff0c;\u56de\u7b54\u4e0d\u662f\u4e00\u6b21\u6027\u7ed9\u51fa&#xff0c;\u800c\u662f\u4e00\u4e2a\u5b57\u4e00\u4e2a\u5b57\u5f80\u5916\u6d41&#xff1b;\u6253\u5f00\u80a1\u7968\u884c\u60c5\u9875&#xff0c;\u4ef7\u683c\u81ea\u5df1\u8df3&#xff0c;\u4e0d\u7528\u5237\u65b0&#xff1b;\u7f51\u9875\u7248\u5fae\u4fe1\u91cc&#xff0c;\u65b0\u6d88\u606f\u81ea\u5df1\u5f39\u51fa\u6765\u3002\u8fd9\u4e09\u4e2a\u573a\u666f\u80cc\u540e\u662f\u540c\u4e00\u4e2a\u95ee\u9898&#xff1a;\u6d4f\u89c8\u5668\u548c\u670d\u52a1\u5668\u4e4b\u95f4&#xff0c;\u8bdd\u662f\u600e\u4e48\u4f20\u7684&#xff1f; \u5e72\u8fd9\u4ef6\u4e8b\u7684\u534f\u8bae\u4e3b\u8981\u6709\u4e09\u4e2a&#xff1a;HTTP\u3001WebSocket \u548c SSE\u3002\u5b83\u4eec\u4e0d\u662f\u8c01\u53d6\u4ee3\u8c01&#xff0c;\u800c\u662f\u4e00\u6761\u6f14\u8fdb\u7ebf\u4e0a\u7684\u5206\u5de5&amp;#x<\/p>\n","protected":false},"author":2,"featured_media":92052,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[72,81,50],"topic":[],"class_list":["post-92056","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-fastapi","tag-python","tag-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u4e00\u6587\u641e\u61c2 SSE:\u5927\u6a21\u578b\u9010\u5b57\u8f93\u51fa\u7684\u80cc\u540e,\u670d\u52a1\u5668\u662f\u600e\u4e48\u201c\u4e3b\u52a8\u8bf4\u8bdd\u201c\u7684? - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/92056.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4e00\u6587\u641e\u61c2 SSE:\u5927\u6a21\u578b\u9010\u5b57\u8f93\u51fa\u7684\u80cc\u540e,\u670d\u52a1\u5668\u662f\u600e\u4e48\u201c\u4e3b\u52a8\u8bf4\u8bdd\u201c\u7684? - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" 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