122 lines
3.4 KiB
TypeScript
122 lines
3.4 KiB
TypeScript
// AI聊天API - 使用Gemini API
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import { NextRequest, NextResponse } from 'next/server';
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import { getServerSession } from 'next-auth';
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import { authOptions } from '@/lib/auth';
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// POST - 发送消息到AI
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export async function POST(request: NextRequest) {
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try {
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const session = await getServerSession(authOptions);
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if (!session) {
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return NextResponse.json(
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{ error: '未授权' },
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{ status: 401 }
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);
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}
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const { messages, model } = await request.json();
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const apiKey = process.env.GEMINI_API_KEY;
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const apiBaseUrl = process.env.GEMINI_API_BASE_URL || 'https://generativelanguage.googleapis.com/v1beta';
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const modelName = model || process.env.GEMINI_MODEL || 'gemini-2.0-flash-exp';
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if (!apiKey) {
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return NextResponse.json(
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{ error: 'Gemini API未配置' },
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{ status: 500 }
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);
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}
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// 转换消息格式为Gemini格式
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const geminiMessages = messages.map((msg: any) => {
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// 文本消息
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if (typeof msg.content === 'string') {
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return {
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role: msg.role === 'assistant' ? 'model' : 'user',
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parts: [{ text: msg.content }],
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};
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}
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// 多模态消息（文本+图片）
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if (Array.isArray(msg.content)) {
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const parts = msg.content.map((part: any) => {
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if (part.type === 'text') {
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return { text: part.text };
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}
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if (part.type === 'image_url') {
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// 解析base64图片
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const match = part.image_url.url.match(/data:image\/([^;]+);base64,(.+)/);
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if (match) {
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return {
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inlineData: {
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mimeType: `image/${match[1]}`,
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data: match[2],
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},
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};
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}
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}
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return null;
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}).filter(Boolean);
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return {
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role: msg.role === 'assistant' ? 'model' : 'user',
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parts,
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};
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}
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return null;
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}).filter(Boolean);
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// 调用Gemini API
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const response = await fetch(
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`${apiBaseUrl}/models/${modelName}:generateContent?key=${apiKey}`,
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{
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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},
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body: JSON.stringify({
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contents: geminiMessages,
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generationConfig: {
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temperature: 1,
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topK: 40,
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topP: 0.95,
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maxOutputTokens: 8192,
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},
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}),
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}
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);
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if (!response.ok) {
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const errorData = await response.json().catch(() => ({}));
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console.error('Gemini API error:', errorData);
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return NextResponse.json(
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{ error: errorData.error?.message || '调用Gemini API失败' },
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{ status: response.status }
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);
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}
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const data = await response.json();
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return NextResponse.json(data);
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} catch (error) {
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console.error('AI chat error:', error);
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return NextResponse.json(
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{ error: error instanceof Error ? error.message : '处理失败' },
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{ status: 500 }
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);
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}
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}
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// GET - 获取AI配置状态
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export async function GET() {
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const apiKey = process.env.GEMINI_API_KEY;
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const apiBaseUrl = process.env.GEMINI_API_BASE_URL || 'https://generativelanguage.googleapis.com/v1beta';
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const model = process.env.GEMINI_MODEL || 'gemini-2.0-flash-exp';
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return NextResponse.json({
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configured: !!apiKey,
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apiBaseUrl,
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model,
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});
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}
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