big-agi/pages/api/openai/chat.ts

import { NextRequest, NextResponse } from 'next/server';

import { OpenAI } from '@/modules/openai/openai.types';
import { openaiPost, toApiChatRequest, toWireCompletionRequest } from '@/modules/openai/openai.server';




export default async function handler(req: NextRequest) {
  try {
    const requestBodyJson = await req.json();
    const { api, ...rest } = await toApiChatRequest(requestBodyJson);
    const upstreamRequest: OpenAI.Wire.Chat.CompletionRequest = toWireCompletionRequest(rest, false);
    const upstreamResponse: OpenAI.Wire.Chat.CompletionResponse = await openaiPost(api, '/v1/chat/completions', upstreamRequest);
    return new NextResponse(JSON.stringify({
      message: upstreamResponse.choices[0].message,
    } satisfies OpenAI.API.Chat.Response));
  } catch (error: any) {
    // don't log 429 errors, they are expected
    if (!error || !(typeof error.startsWith === 'function') || !error.startsWith('Error: 429 · Too Many Requests'))
      console.error('api/openai/chat error:', error);
    return new NextResponse(`[Issue] ${error}`, { status: 400 });
  }
}

// noinspection JSUnusedGlobalSymbols
export const config = {
  runtime: 'edge',
};