增加ai问片功能

This commit is contained in:
mtvpls
2025-12-29 14:41:59 +08:00
parent 24223a5d27
commit 0a66626545
14 changed files with 3076 additions and 9 deletions
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/* eslint-disable @typescript-eslint/no-explicit-any,no-console */
import { NextRequest, NextResponse } from 'next/server';
import { getAuthInfoFromCookie } from '@/lib/auth';
import {
orchestrateDataSources,
VideoContext,
} from '@/lib/ai-orchestrator';
import { getConfig } from '@/lib/config';
export const runtime = 'nodejs';
interface ChatMessage {
role: 'user' | 'assistant';
content: string;
}
interface ChatRequest {
message: string;
context?: VideoContext;
history?: ChatMessage[];
}
/**
* OpenAI兼容的流式聊天请求
*/
async function streamOpenAIChat(
messages: ChatMessage[],
config: {
apiKey: string;
baseURL: string;
model: string;
temperature: number;
maxTokens: number;
}
): Promise<ReadableStream> {
const response = await fetch(`${config.baseURL}/chat/completions`, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
Authorization: `Bearer ${config.apiKey}`,
},
body: JSON.stringify({
model: config.model,
messages,
temperature: config.temperature,
max_tokens: config.maxTokens,
stream: true,
}),
});
if (!response.ok) {
throw new Error(
`OpenAI API error: ${response.status} ${response.statusText}`
);
}
return response.body!;
}
/**
* Claude API流式聊天请求
*/
async function streamClaudeChat(
messages: ChatMessage[],
systemPrompt: string,
config: {
apiKey: string;
model: string;
temperature: number;
maxTokens: number;
}
): Promise<ReadableStream> {
// Claude API格式: 移除system消息,单独传递
const userMessages = messages.filter((m) => m.role !== 'system');
const response = await fetch('https://api.anthropic.com/v1/messages', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'x-api-key': config.apiKey,
'anthropic-version': '2023-06-01',
},
body: JSON.stringify({
model: config.model,
max_tokens: config.maxTokens,
temperature: config.temperature,
system: systemPrompt,
messages: userMessages,
stream: true,
}),
});
if (!response.ok) {
throw new Error(
`Claude API error: ${response.status} ${response.statusText}`
);
}
return response.body!;
}
/**
* 转换流为SSE格式
*/
function transformToSSE(
stream: ReadableStream,
provider: 'openai' | 'claude' | 'custom'
): ReadableStream {
const reader = stream.getReader();
const decoder = new TextDecoder();
return new ReadableStream({
async start(controller) {
try {
while (true) {
const { done, value } = await reader.read();
if (done) break;
const chunk = decoder.decode(value, { stream: true });
const lines = chunk.split('\n').filter((line) => line.trim() !== '');
for (const line of lines) {
if (line.startsWith('data: ')) {
const data = line.slice(6);
if (data === '[DONE]') {
controller.enqueue(
new TextEncoder().encode('data: [DONE]\n\n')
);
continue;
}
try {
const json = JSON.parse(data);
// 提取文本内容
let text = '';
if (provider === 'claude') {
// Claude格式
if (json.type === 'content_block_delta') {
text = json.delta?.text || '';
}
} else {
// OpenAI格式
text = json.choices?.[0]?.delta?.content || '';
}
if (text) {
controller.enqueue(
new TextEncoder().encode(`data: ${JSON.stringify({ text })}\n\n`)
);
}
} catch (e) {
console.error('Parse stream chunk error:', e);
}
}
}
}
} catch (error) {
console.error('Stream error:', error);
controller.error(error);
} finally {
controller.close();
}
},
});
}
export async function POST(request: NextRequest) {
try {
// 1. 验证用户登录
const authInfo = getAuthInfoFromCookie(request);
if (!authInfo || !authInfo.username) {
return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
}
// 2. 获取AI配置
const adminConfig = await getConfig();
const aiConfig = adminConfig.AIConfig;
if (!aiConfig || !aiConfig.Enabled) {
return NextResponse.json(
{ error: 'AI功能未启用' },
{ status: 400 }
);
}
// 3. 解析请求参数
const body = (await request.json()) as ChatRequest;
const { message, context, history = [] } = body;
if (!message || typeof message !== 'string') {
return NextResponse.json(
{ error: '消息内容不能为空' },
{ status: 400 }
);
}
console.log('📨 收到AI聊天请求:', {
message: message.slice(0, 50),
context,
historyLength: history.length,
});
// 4. 使用orchestrator协调数据源
const orchestrationResult = await orchestrateDataSources(
message,
context,
{
enableWebSearch: aiConfig.EnableWebSearch,
webSearchProvider: aiConfig.WebSearchProvider,
tavilyApiKey: aiConfig.TavilyApiKey,
serperApiKey: aiConfig.SerperApiKey,
serpApiKey: aiConfig.SerpApiKey,
// 决策模型配置(固定使用自定义provider)
enableDecisionModel: aiConfig.EnableDecisionModel,
decisionProvider: 'custom',
decisionApiKey: aiConfig.DecisionCustomApiKey,
decisionBaseURL: aiConfig.DecisionCustomBaseURL,
decisionModel: aiConfig.DecisionCustomModel,
}
);
console.log('🎯 数据协调完成, systemPrompt长度:', orchestrationResult.systemPrompt.length);
// 5. 构建消息列表
const systemPrompt = aiConfig.SystemPrompt
? `${aiConfig.SystemPrompt}\n\n${orchestrationResult.systemPrompt}`
: orchestrationResult.systemPrompt;
const messages: ChatMessage[] = [
{ role: 'user', content: systemPrompt },
{ role: 'assistant', content: '明白了,我会按照要求回答用户的问题。' },
...history,
{ role: 'user', content: message },
];
// 6. 调用自定义API
const temperature = aiConfig.Temperature ?? 0.7;
const maxTokens = aiConfig.MaxTokens ?? 1000;
if (!aiConfig.CustomApiKey || !aiConfig.CustomBaseURL) {
return NextResponse.json(
{ error: '自定义API配置不完整' },
{ status: 400 }
);
}
const stream = await streamOpenAIChat(messages, {
apiKey: aiConfig.CustomApiKey,
baseURL: aiConfig.CustomBaseURL,
model: aiConfig.CustomModel || 'gpt-3.5-turbo',
temperature,
maxTokens,
});
// 7. 转换为SSE格式并返回
const sseStream = transformToSSE(stream, 'openai');
return new NextResponse(sseStream, {
headers: {
'Content-Type': 'text/event-stream',
'Cache-Control': 'no-cache',
Connection: 'keep-alive',
},
});
} catch (error) {
console.error('❌ AI聊天API错误:', error);
return NextResponse.json(
{
error: 'AI聊天请求失败',
details: (error as Error).message,
},
{ status: 500 }
);
}
}