{"id":87220,"date":"2026-07-30T02:56:35","date_gmt":"2026-07-29T18:56:35","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/87220.html"},"modified":"2026-07-30T02:56:35","modified_gmt":"2026-07-29T18:56:35","slug":"%e5%a4%a7%e6%a8%a1%e5%9e%8b%e6%b5%81%e5%bc%8f%e5%af%b9%e8%af%9d%e7%95%8c%e9%9d%a2%ef%bc%9a%e4%bb%8e-sse-%e7%ae%a1%e9%81%93%e5%88%b0%e5%a2%9e%e9%87%8f%e6%b8%b2%e6%9f%93%e7%9a%84%e8%90%bd%e5%9c%b0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/87220.html","title":{"rendered":"\u5927\u6a21\u578b\u6d41\u5f0f\u5bf9\u8bdd\u754c\u9762\uff1a\u4ece SSE \u7ba1\u9053\u5230\u589e\u91cf\u6e32\u67d3\u7684\u843d\u5730\u5b9e\u8df5"},"content":{"rendered":"

\u5927\u6a21\u578b\u6d41\u5f0f\u5bf9\u8bdd\u754c\u9762：\u4ece SSE \u7ba1\u9053\u5230\u589e\u91cf\u6e32\u67d3\u7684\u843d\u5730\u5b9e\u8df5<\/h2>\n

\u4e00\u3001\u9996\u5b57\u5ef6\u8fdf\u4e0e\u9010\u5b57\u5448\u73b0：\u5bf9\u8bdd\u4f53\u9a8c\u7684\u53cc\u91cd\u535a\u5f08<\/h3>\n

\u53bb\u5e74\u6211\u4eec\u7ed9\u4e00\u4e2a\u6cd5\u5f8b\u54a8\u8be2\u4ea7\u54c1\u63a5\u5927\u6a21\u578b，\u4e0a\u7ebf\u524d\u5ba2\u6237\u8bd5\u7528\u7b2c\u4e00\u53e5\u5c31\u95ee"\u4e3a\u5565\u6309\u56de\u8f66\u8981\u7b49 4 \u79d2\u624d\u51fa\u5b57"\u3002\u8fd9\u4e8b\u6211\u89c1\u8fc7\u592a\u591a\u56e2\u961f\u683d\u8fdb\u53bb\u3002\u7528\u6237\u6700\u654f\u611f\u7684\u6307\u6807\u4e0d\u662f\u6700\u7ec8\u7b54\u6848\u8d28\u91cf，\u800c\u662f"\u591a\u4e45\u80fd\u770b\u5230\u7b2c\u4e00\u4e2a\u5b57"\u3002\u4e00\u6b21\u5b8c\u6574\u7684\u63a8\u7406\u8bf7\u6c42，\u4ece\u7f51\u5173\u8f6c\u53d1\u3001\u6a21\u578b\u9884\u586b\u5145（prefill）\u5230\u89e3\u7801\u751f\u6210，\u7aef\u5230\u7aef\u8017\u65f6\u5f80\u5f80\u5728\u6570\u79d2\u91cf\u7ea7\u3002\u82e5\u91c7\u7528\u4f20\u7edf\u7684\u8bf7\u6c42\u2014\u54cd\u5e94\u6a21\u5f0f，\u754c\u9762\u4f1a\u957f\u65f6\u95f4\u505c\u7559\u5728\u8f6c\u5708\u72b6\u6001，\u7528\u6237\u6d41\u5931\u7387\u663e\u8457\u4e0a\u5347\u3002<\/p>\n

\u6d41\u5f0f\u8f93\u51fa（streaming）\u6b63\u662f\u4e3a\u89e3\u51b3\u8be5\u95ee\u9898\u800c\u751f\u3002\u670d\u52a1\u7aef\u501f\u52a9 SSE（Server-Sent Events）\u6216\u5206\u5757\u4f20\u8f93\u7f16\u7801，\u628a\u751f\u6210\u7684 token \u9010\u4e2a\u63a8\u9001\u7ed9\u524d\u7aef，\u6d4f\u89c8\u5668\u5728\u6536\u5230\u9996\u5757\u6570\u636e\u65f6\u5373\u53ef\u5f00\u59cb\u6e32\u67d3\u3002\u8fd9\u79cd"\u8fb9\u751f\u6210\u8fb9\u5c55\u793a"\u7684\u6a21\u5f0f，\u628a"\u9996\u5b57\u5ef6\u8fdf"（Time to First Token，TTFT）\u4e0e"\u5b8c\u6574\u54cd\u5e94\u5ef6\u8fdf"（Time to Last Token，TTLT）\u89e3\u8026，\u8ba9\u7528\u6237\u5728\u7b49\u5f85\u7684\u540c\u65f6\u83b7\u5f97\u53cd\u9988\u3002\u67d0 ToC \u52a9\u624b\u628a\u9996\u5b57\u5ef6\u8fdf\u4ece 3.8 \u79d2\u538b\u5230 720 \u6beb\u79d2\u540e，\u4f1a\u8bdd\u5b8c\u6210\u7387\u76f4\u63a5\u6da8\u4e86 23%\u3002<\/p>\n

\u4f46\u6d41\u5f0f\u5e76\u975e\u514d\u8d39\u5348\u9910\u3002\u524d\u7aef\u9700\u8981\u9762\u5bf9\u5f02\u6b65\u7ba1\u9053\u7684\u80cc\u538b\u3001\u6587\u672c\u589e\u91cf\u62fc\u63a5\u3001Markdown \u534a\u622a\u8bed\u6cd5\u7684\u4e34\u65f6\u6e32\u67d3，\u4ee5\u53ca\u65ad\u7ebf\u91cd\u8fde\u7b49\u5de5\u7a0b\u95ee\u9898\u3002\u4e0b\u6587\u5c06\u4ece\u7ba1\u9053\u8bbe\u8ba1\u5207\u5165，\u7ed9\u51fa\u4e00\u5957\u53ef\u843d\u5730\u7684\u751f\u4ea7\u7ea7\u65b9\u6848\u3002<\/p>\n

\u4e8c\u3001\u6d41\u5f0f\u7ba1\u9053\u7684\u5206\u5c42\u67b6\u6784：\u4ece\u7f51\u7edc\u5c42\u5230\u89c6\u56fe\u5c42<\/h3>\n

\u4e00\u4e2a\u5065\u58ee\u7684\u6d41\u5f0f\u5bf9\u8bdd\u524d\u7aef，\u5e94\u5f53\u628a"\u4f20\u8f93\u3001\u89e3\u6790\u3001\u72b6\u6001\u3001\u6e32\u67d3"\u56db\u5c42\u804c\u8d23\u89e3\u8026\u3002\u7f51\u7edc\u5c42\u53ea\u5173\u5fc3\u8fde\u63a5\u4e0e\u5b57\u8282\u6d41；\u89e3\u6790\u5c42\u628a\u539f\u59cb\u6587\u672c\u5207\u5206\u4e3a\u7ed3\u6784\u5316\u4e8b\u4ef6；\u72b6\u6001\u5c42\u7ef4\u62a4\u6d88\u606f\u7684\u4e0d\u53ef\u53d8\u5feb\u7167；\u6e32\u67d3\u5c42\u6839\u636e\u5feb\u7167\u505a\u6700\u5c0f\u5316\u7684\u89c6\u56fe\u66f4\u65b0\u3002\u5206\u5c42\u540e，\u4efb\u610f\u4e00\u5c42\u90fd\u53ef\u72ec\u7acb\u66ff\u6362\u4e0e\u6d4b\u8bd5\u3002\u67d0\u6b21\u5927\u4fc3\u524d\u6211\u4eec\u628a\u6e32\u67d3\u5c42\u4ece React \u6362\u6210 Vue，\u4e1a\u52a1\u4ee3\u7801\u51e0\u4e4e\u96f6\u6539\u52a8，\u8fd9\u5c31\u662f\u5206\u5c42\u5e26\u6765\u7684\u7ea2\u5229\u3002<\/p>\n

\u6570\u636e\u4ece\u670d\u52a1\u7aef\u5230\u5c4f\u5e55\u7684\u5b8c\u6574\u6d41\u8f6c，\u5173\u952e\u5728\u4e8e\u89e3\u6790\u5c42\u4e0e\u72b6\u6001\u5c42\u4e4b\u95f4\u7684\u4e00\u9053"\u7f13\u51b2\u95f8"：\u6d4f\u89c8\u5668\u4e0d\u5e94\u6bcf\u6536\u5230\u4e00\u4e2a token \u5c31\u89e6\u53d1\u4e00\u6b21 React \u91cd\u6e32\u67d3，\u5426\u5219\u9ad8\u9891 setState \u4f1a\u9020\u6210\u4e3b\u7ebf\u7a0b\u6296\u52a8\u3002\u6b63\u786e\u505a\u6cd5\u662f\u7528 requestAnimationFrame \u628a\u591a\u4e2a delta \u5408\u5e76\u5230\u4e00\u5e27\u5185\u6279\u91cf\u63d0\u4ea4\u3002\u67d0\u9879\u76ee\u4e0d\u52a0\u95f8\u95e8\u65f6 setState \u6bcf\u79d2\u89e6\u53d1 60 \u6b21，\u52a0\u4e86\u4e4b\u540e\u964d\u5230 60 \u5e27，CPU \u5360\u7528\u76f4\u63a5\u8170\u65a9\u3002<\/p>\n

\u4e09\u3001\u751f\u4ea7\u7ea7\u6d41\u5f0f\u6d88\u8d39：\u80cc\u538b\u63a7\u5236\u4e0e\u5f02\u5e38\u515c\u5e95<\/h3>\n

\u4e0b\u9762\u7684\u5b9e\u73b0\u57fa\u4e8e\u539f\u751f fetch \u4e0e ReadableStream，\u4e0d\u4f9d\u8d56\u7b2c\u4e09\u65b9 SDK，\u4fbf\u4e8e\u5728\u4efb\u610f\u524d\u7aef\u6846\u67b6\u4e2d\u590d\u7528\u3002\u6838\u5fc3\u8bbe\u8ba1\u70b9\u6709\u4e09：\u5176\u4e00，\u7528 AbortController \u5b9e\u73b0\u8d85\u65f6\u4e0e\u7528\u6237\u4e3b\u52a8\u4e2d\u65ad\u3002\u5176\u4e8c，\u7528 requestAnimationFrame \u505a\u6e32\u67d3\u8282\u6d41，\u907f\u514d token \u6d2a\u5cf0\u51fb\u7a7f\u4e3b\u7ebf\u7a0b\u3002\u5176\u4e09，\u5bf9 SSE \u5e27\u505a\u8fb9\u754c\u5bb9\u9519，\u534a\u622a JSON \u4e0d\u89e3\u6790\u3001\u4e22\u5931 data: \u524d\u7f00\u4e0d\u5d29\u6e83\u3002<\/p>\n

interface StreamOptions {
\n url: string;
\n body: Record<string, unknown>;
\n \/\/ \u5355\u6b21\u8bf7\u6c42\u6700\u957f\u5b58\u6d3b\u65f6\u95f4，\u9632\u6b62\u540e\u7aef\u5047\u6b7b\u5bfc\u81f4\u8fde\u63a5\u6c38\u8fdc\u6302\u8d77
\n timeoutMs?: number;
\n \/\/ \u6e32\u67d3\u5e27\u5408\u5e76\u7a97\u53e3，\u5e73\u8861"\u5b9e\u65f6\u611f"\u4e0e"\u4e3b\u7ebf\u7a0b\u5360\u7528"
\n flushIntervalMs?: number;
\n onDelta: (text: string) => void;
\n onDone: (full: string) => void;
\n onError: (err: Error) => void;
\n}<\/p>\n

async function consumeChatStream(opts: StreamOptions): Promise<void> {
\n const { url, body, timeoutMs = 60_000, flushIntervalMs = 16, onDelta, onDone, onError } = opts;<\/p>\n

\/\/ \u8d85\u65f6\u63a7\u5236：\u6a21\u578b\u670d\u52a1\u5076\u53d1hang\u4f4f\u65f6，\u5fc5\u987b\u4e3b\u52a8\u65ad\u5f00\u800c\u975e\u65e0\u9650\u7b49\u5f85
\n const controller = new AbortController();
\n const timer = setTimeout(() => controller.abort(new Error('STREAM_TIMEOUT')), timeoutMs);<\/p>\n

\/\/ \u6e32\u67d3\u7f13\u51b2：\u7d2f\u79ef delta，\u6309\u5e27\u5408\u5e76\u63d0\u4ea4，\u907f\u514d\u6bcf token \u4e00\u6b21\u91cd\u6e32\u67d3
\n let buffer = '';
\n let rafId = 0;
\n let fullText = '';<\/p>\n

const flush = () => {
\n if (buffer) {
\n fullText += buffer;
\n onDelta(buffer);
\n buffer = '';
\n }
\n rafId = 0;
\n };<\/p>\n

const scheduleFlush = () => {
\n \/\/ \u65e0 pending \u5e27\u65f6\u624d\u7533\u8bf7，\u9632\u6b62\u91cd\u590d\u8c03\u5ea6\u9020\u6210\u53e0\u52a0
\n if (!rafId) rafId = requestAnimationFrame(flush);
\n };<\/p>\n

try {
\n const resp = await fetch(url, {
\n method: 'POST',
\n headers: { 'Content-Type': 'application\/json' },
\n body: JSON.stringify(body),
\n signal: controller.signal,
\n });
\n if (!resp.ok || !resp.body) {
\n throw new Error(`UPSTREAM_HTTP_${resp.status}`);
\n }<\/p>\n

const reader = resp.body.getReader();
\n const decoder = new TextDecoder('utf-8');
\n let frame = '';<\/p>\n

while (true) {
\n const { value, done } = await reader.read();
\n if (done) break;
\n frame += decoder.decode(value, { stream: true });<\/p>\n

\/\/ \u6309 SSE \u53cc\u6362\u884c\u5207\u5206\u5b8c\u6574\u4e8b\u4ef6\u5e27，\u534a\u622a\u5e27\u7559\u5728\u7f13\u51b2\u533a\u7b49\u5f85\u540e\u7eed\u5b57\u8282
\n const parts = frame.split('\\\\n\\\\n');
\n frame = parts.pop() ?? '';<\/p>\n

for (const chunk of parts) {
\n const line = chunk.replace(\/^data:\\\\s*\/, '').trim();
\n if (!line || line === '[DONE]') continue;
\n try {
\n const json = JSON.parse(line);
\n buffer += json.choices?.[0]?.delta?.content ?? '';
\n scheduleFlush();
\n } catch {
\n \/\/ \u5bb9\u5fcd\u5355\u5e27 JSON \u6b8b\u7f3a：\u8df3\u8fc7\u800c\u975e\u4e2d\u65ad\u6574\u6761\u6d41，\u4fdd\u8bc1\u540e\u7eed\u5185\u5bb9\u4ecd\u53ef\u5448\u73b0
\n continue;
\n }
\n }
\n }
\n flush();
\n onDone(fullText);
\n } catch (err) {
\n \/\/ \u7528\u6237\u4e3b\u52a8\u4e2d\u65ad\u5c5e\u4e8e\u6b63\u5e38\u4ea4\u4e92，\u4e0d\u5e94\u4e0a\u62a5\u4e3a\u9519\u8bef
\n if ((err as Error).name === 'AbortError') return;
\n onError(err as Error);
\n } finally {
\n clearTimeout(timer);
\n if (rafId) cancelAnimationFrame(rafId);
\n }
\n}<\/p>\n

\u56db\u3001\u8fb9\u754c\u6743\u8861：\u5b9e\u65f6\u6027\u3001\u7a33\u5b9a\u6027\u4e0e\u6210\u672c\u7684\u4e09\u89d2\u51b2\u7a81<\/h3>\n

\u6d41\u5f0f\u754c\u9762\u7684\u6700\u5927\u9677\u9631\u662f"\u4e3a\u4e86\u5feb\u800c\u727a\u7272\u5065\u58ee"\u3002\u9700\u8981\u660e\u786e\u4ee5\u4e0b\u8fb9\u754c：\u7b2c\u4e00，\u5f53\u7f51\u7edc\u6296\u52a8\u5bfc\u81f4\u8fde\u63a5\u65ad\u5f00\u65f6，\u4e0d\u5e94\u76f2\u76ee\u5168\u91cf\u91cd\u8fde，\u800c\u5e94\u6309\u6d88\u606f\u7ef4\u5ea6\u505a\u65ad\u70b9\u7eed\u4f20\u6216\u5e42\u7b49\u91cd\u8bd5，\u5426\u5219\u4f1a\u91cd\u590d\u8ba1\u8d39 token\u3002\u67d0\u9879\u76ee\u66fe\u56e0\u65ad\u7ebf\u91cd\u8fde\u4e00\u6b21\u591a\u82b1\u4e86 3 \u4e07 token，\u6708\u5ea6\u8d26\u5355\u76f4\u63a5\u7ffb\u500d\u3002<\/p>\n

\u7b2c\u4e8c，Markdown \u534a\u622a\u8bed\u6cd5（\u5982\u672a\u95ed\u5408\u7684\u4ee3\u7801\u5757\u56f4\u680f）\u5728\u589e\u91cf\u6e32\u67d3\u65f6\u5fc5\u987b\u964d\u7ea7\u4e3a\u7eaf\u6587\u672c，\u5f85\u95ed\u5408\u540e\u518d\u5347\u7ea7\u4e3a\u9ad8\u4eae\u89c6\u56fe，\u5426\u5219\u4f1a\u89e6\u53d1\u89e3\u6790\u5f02\u5e38\u6216\u5e03\u5c40\u6296\u52a8\u3002<\/p>\n

\u7b2c\u4e09，\u79fb\u52a8\u7aef\u5f31\u7f51\u73af\u5883\u4e0b，\u9010\u5b57\u6e32\u67d3\u7684\u89c6\u89c9\u6536\u76ca\u4f1a\u88ab\u9891\u7e41\u91cd\u6392\u62b5\u6d88\u3002\u6b64\u65f6\u5e94\u63d0\u9ad8 flushIntervalMs \u9608\u503c，\u628a\u591a\u6b21 delta \u5408\u5e76\u6210"\u6574\u53e5"\u518d\u7ed8\u5236\u3002<\/p>\n

\u7b2c\u56db，\u670d\u52a1\u7aef\u82e5\u5f00\u542f\u601d\u8003\u94fe（reasoning）\u5b57\u6bb5，\u524d\u7aef\u9700\u628a"\u601d\u8003\u4e2d"\u4e0e"\u6b63\u5f0f\u56de\u7b54"\u5206\u69fd\u5c55\u793a，\u907f\u514d\u628a\u5185\u90e8\u63a8\u7406\u8fc7\u7a0b\u8bef\u5f53\u4f5c\u6700\u7ec8\u7ed3\u8bba\u6e32\u67d3\u7ed9\u7528\u6237\u3002<\/p>\n

\u6d41\u5f0f\u65b9\u6848\u7684\u9002\u7528\u8fb9\u754c\u6e05\u6670：\u5b83\u9002\u5408\u5bf9\u8bdd\u3001\u5199\u4f5c\u3001\u4ee3\u7801\u751f\u6210\u7b49"\u8fc7\u7a0b\u5373\u4ef7\u503c"\u7684\u573a\u666f；\u5bf9\u8981\u6c42\u5f3a\u4e00\u81f4\u6027\u7684\u7ed3\u6784\u5316\u62bd\u53d6\u4efb\u52a1，\u6279\u91cf\u8fd4\u56de\u914d\u5408\u8fdb\u5ea6\u6761\u53cd\u800c\u66f4\u7701\u5fc3\u3002<\/p>\n

\u7ed3\u8bba<\/h3>\n

\u6784\u5efa\u5927\u6a21\u578b\u6d41\u5f0f\u5bf9\u8bdd\u754c\u9762，\u6838\u5fc3\u662f\u628a\u7f51\u7edc\u6d41\u3001\u4e8b\u4ef6\u89e3\u6790\u3001\u72b6\u6001\u7f13\u51b2\u4e0e\u6e32\u67d3\u8c03\u5ea6\u56db\u5c42\u89e3\u8026\u3002\u7f51\u7edc\u5c42\u4f7f\u7528 fetch + ReadableStream \u6d88\u8d39\u5206\u5757\u54cd\u5e94，\u5e76\u4ee5 AbortController \u5b9e\u73b0\u8d85\u65f6\u4e0e\u4e2d\u65ad；\u89e3\u6790\u5c42\u6309 SSE \u534f\u8bae\u5207\u5206\u4e8b\u4ef6\u5e27\u5e76\u5bb9\u5fcd\u534a\u622a JSON；\u72b6\u6001\u5c42\u501f\u52a9 requestAnimationFrame \u628a token \u6d2a\u5cf0\u5408\u5e76\u5230\u6e32\u67d3\u5e27，\u4fdd\u62a4\u4e3b\u7ebf\u7a0b；\u6e32\u67d3\u5c42\u5bf9\u672a\u95ed\u5408\u7684 Markdown \u505a\u964d\u7ea7\u5904\u7406\u3002<\/p>\n

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