117 lines
3.2 KiB
TypeScript
117 lines
3.2 KiB
TypeScript
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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export async function POST(req: 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 req.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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// 构建Gemini API请求
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const geminiMessages = messages.map((msg: any) => {
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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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} else 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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} else if (part.type === 'image_url') {
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// 提取base64图片数据
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const base64Match = part.image_url.url.match(/data:image\/([^;]+);base64,(.+)/)
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if (base64Match) {
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return {
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inlineData: {
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mimeType: `image/${base64Match[1]}`,
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data: base64Match[2]
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}
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}
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}
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}
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return null
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}).filter(Boolean)
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return {
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role: msg.role === 'assistant' ? 'model' : 'user',
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parts
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}
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}
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return null
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}).filter(Boolean)
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// 调用Gemini API
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const response = await fetch(
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`${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 endpoint to check API configuration
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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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