66 行
1.7 KiB
TypeScript
66 行
1.7 KiB
TypeScript
import Koa, {Context, Next} from 'koa';
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import Router from 'koa-router'
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import bodyParser from 'koa-bodyparser';
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import {ChatModelFactory, Model} from "./model";
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const app = new Koa();
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const router = new Router();
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const errorHandler = async (ctx: Context, next: Next) => {
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try {
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await next();
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} catch (err: any) {
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console.error(err);
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ctx.body = JSON.stringify(err);
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ctx.res.end();
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}
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};
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app.use(errorHandler);
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app.use(bodyParser());
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const chatModel = new ChatModelFactory();
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interface AskReq {
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prompt: string;
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model: Model;
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}
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router.get('/ask', async (ctx) => {
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const {prompt, model = Model.Forefront, ...options} = ctx.query as unknown as AskReq;
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if (!prompt) {
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ctx.body = 'please input prompt';
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return;
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}
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const chat = chatModel.get(model);
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if (!chat) {
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ctx.body = 'Unsupported model';
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return;
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}
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const res = await chat.ask({prompt: prompt as string, options});
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ctx.body = res;
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});
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router.get('/ask/stream', async (ctx) => {
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const {prompt, model = Model.Forefront, ...options} = ctx.query as unknown as AskReq;
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if (!prompt) {
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ctx.body = 'please input prompt';
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return;
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}
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const chat = chatModel.get(model);
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if (!chat) {
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ctx.body = 'Unsupported model';
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return;
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}
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ctx.set({
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"Content-Type": "text/event-stream;charset=utf-8",
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"Cache-Control": "no-cache",
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"Connection": "keep-alive",
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});
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const res = await chat.askStream({prompt: prompt as string, options});
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ctx.body = res?.text;
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})
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app.use(router.routes());
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app.listen(3000, () => {
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console.log("Now listening: 127.0.0.1:3000");
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});
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