Create main.ts

main.ts

@@ -0,0 +1,671 @@
+import { serve } from "https://deno.land/std@0.140.0/http/server.ts";
+import { Md5 } from "https://deno.land/std@0.140.0/hash/md5.ts";
+
+const API_DOMAIN = 'https://ai-api.dangbei.net';
+const USER_AGENTS = [
+  'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36',
+  'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36',
+  'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36',
+  'Mozilla/5.0 (iPhone; CPU iPhone OS 16_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.0 Mobile/15E148 Safari/604.1',
+  'Mozilla/5.0 (iPad; CPU OS 16_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.0 Mobile/15E148 Safari/604.1'
+];
+const VALID_API_KEY = Deno.env.get('VALID_API_KEY');
+const MAX_CONVERSATIONS_PER_DEVICE = 10;  //  每个设备最多创建的会话数 
+
+class ChatManage {
+  private currentDeviceId: string | null = null;
+  private currentConversationId: string | null = null;
+  private conversationCount = 0;
+  private currentUserAgent: string;
+
+  constructor() {
+    this.currentUserAgent = this.getRandomUserAgent();
+  }
+
+  private getRandomUserAgent(): string {
+    return USER_AGENTS[Math.floor(Math.random() * USER_AGENTS.length)];
+  }
+
+  getOrCreateIds(forceNew = false) {
+    let newDeviceId = this.currentDeviceId;
+    let newConversationId = this.currentConversationId;
+  
+    if (forceNew || !newDeviceId || this.conversationCount >= MAX_CONVERSATIONS_PER_DEVICE) {
+      newDeviceId = this.generateDeviceId();
+      newConversationId = null;
+      this.conversationCount = 0;
+      // 在生成新设备ID时更新 User-Agent
+      this.currentUserAgent = this.getRandomUserAgent();
+    }
+  
+    this.currentDeviceId = newDeviceId;
+    this.currentConversationId = newConversationId;
+  
+    return {
+      deviceId: newDeviceId,
+      conversationId: newConversationId,
+      userAgent: this.currentUserAgent
+    };
+  }
+
+  updateConversationId(conversationId: string) {
+    this.currentConversationId = conversationId;
+    this.conversationCount++;
+  }
+  
+  generateDeviceId() {
+    const uuid = crypto.randomUUID();
+    const urlAlphabet = 'useandom26T198340PX75pxJACKVERYMINDBUSHWOLF_GQZbfghjklqvwyzrict';
+    const nanoid = Array.from(crypto.getRandomValues(new Uint8Array(20)))
+      .map(b => urlAlphabet[b % urlAlphabet.length])
+      .join('');
+    return `${uuid.replace(/-/g, '')}_${nanoid}`;
+  }
+}
+
+class Pipe {
+  private dataPrefix = 'data:';
+  private chatManage = new ChatManage();
+  private searchModels: Record<string, string> = {
+    'DeepSeek-R1-Search': 'deepseek',
+    'DeepSeek-V3-Search': 'deepseek',
+    'Doubao-Search': 'doubao',
+    'Qwen-Search': 'qwen'
+  };
+
+  // 创建新的会话
+  async _create_conversation(deviceId: string) {
+    const { userAgent } = this.chatManage.getOrCreateIds(false);
+    const payload = { botCode: "AI_SEARCH" };
+    const timestamp = Math.floor(Date.now() / 1000).toString();
+    const nonce = this.nanoid(21);
+    const sign = await this.generateSign(timestamp, payload, nonce);
+
+    const headers = {
+      "Origin": "https://ai.dangbei.com",
+      "Referer": "https://ai.dangbei.com/",
+      "User-Agent": userAgent,
+      "deviceId": deviceId,
+      "nonce": nonce,
+      "sign": sign,
+      "timestamp": timestamp,
+      "Content-Type": "application/json"
+    };
+
+    try {
+      console.log('Creating conversation with:', {
+        url: `${API_DOMAIN}/ai-search/conversationApi/v1/create`,
+        headers,
+        payload
+      });
+
+      const response = await fetch(`${API_DOMAIN}/ai-search/conversationApi/v1/create`, {
+        method: 'POST',
+        headers,
+        body: JSON.stringify(payload),
+      });
+
+      console.log('Response status:', response.status);
+      const responseText = await response.text();
+      console.log('Response body:', responseText);
+
+      if (response.ok) {
+        try {
+          const data = JSON.parse(responseText);
+          if (data.success) {
+            console.log('Successfully created conversation:', data.data.conversationId);
+            return data.data.conversationId;
+          } else {
+            console.error('API returned success: false:', data);
+          }
+        } catch (e) {
+          console.error('Failed to parse response:', e);
+        }
+      } else {
+        console.error('HTTP error:', response.status, responseText);
+      }
+    } catch (e) {
+      console.error('Error creating conversation:', e);
+    }
+    return null;
+  }
+
+  // 新增方法：构建完整提示
+  _buildFullPrompt(messages: any[]): string {
+    if (!messages || messages.length === 0) {
+      return '';
+    }
+
+    let systemPrompt = '';
+    const history: string[] = [];
+    let lastUserMessage = '';
+
+    for (const msg of messages) {
+      if (msg.role === 'system' && !systemPrompt) {
+        systemPrompt = msg.content;
+      } else if (msg.role === 'user') {
+        history.push(`user: ${msg.content}`);
+        lastUserMessage = msg.content;
+      } else if (msg.role === 'assistant') {
+        history.push(`assistant: ${msg.content}`);
+      }
+    }
+
+    const parts: string[] = [];
+    if (systemPrompt) {
+      parts.push(`[System Prompt]\n${systemPrompt}`);
+    }
+    if (history.length > 1) {
+      parts.push(`[Chat History]\n${history.slice(0, -1).join('\n')}`);
+    }
+    parts.push(`[Question]\n${lastUserMessage}`);
+
+    return parts.join('\n\n');
+  }
+
+  async* pipe(body: any) {
+    const thinkingState = { thinking: -1 };
+    
+    // Build full prompt
+    const fullPrompt = this._buildFullPrompt(body.messages);
+    
+    // Check if we need to force new conversation
+    let forceNew = false;
+    const messages = body.messages;
+    if (messages.length === 1) {
+      forceNew = true;
+    } else if (messages.length >= 2) {
+      const lastTwo = messages.slice(-2);
+      if (lastTwo[0].role === 'user' && lastTwo[1].role === 'user') {
+        forceNew = true;
+      }
+    }
+
+    // Get or create device ID and conversation ID with User-Agent
+    const { deviceId, conversationId: storedConversationId, userAgent } = this.chatManage.getOrCreateIds(forceNew);
+    let conversationId = storedConversationId;
+
+    // Create new conversation if needed
+    if (!conversationId) {
+      conversationId = await this._create_conversation(deviceId);
+      if (!conversationId) {
+        yield { error: 'Failed to create conversation' };
+        return;
+      }
+      this.chatManage.updateConversationId(conversationId);
+    }
+
+    // Model name handling
+    let modelName;
+    const isSearchModel = body.model.endsWith('-Search');
+    if (isSearchModel) {
+      modelName = this.searchModels[body.model] || body.model.replace('-Search', '').toLowerCase();
+    } else {
+      const isDeepSeekModel = ['DeepSeek-R1', 'DeepSeek-V3'].includes(body.model);
+      modelName = isDeepSeekModel ? 'deepseek' : body.model.toLowerCase();
+    }
+
+    // 确定 userAction 参数
+    let userAction = '';
+    if (body.model.includes('DeepSeek-R1')) {
+      userAction = 'deep';
+    }
+    if (isSearchModel) {
+      userAction = userAction ? `${userAction},online` : 'online';
+    }
+
+    const payload = {
+      stream: true,
+      botCode: 'AI_SEARCH',
+      userAction,
+      model: modelName,
+      conversationId: conversationId,
+      question: fullPrompt,
+    };
+
+    const timestamp = Math.floor(Date.now() / 1000).toString();
+    const nonce = this.nanoid(21);
+    const sign = await this.generateSign(timestamp, payload, nonce);
+
+    const headers = {
+      'Origin': 'https://ai.dangbei.com',
+      'Referer': 'https://ai.dangbei.com/',
+      'User-Agent': userAgent,
+      'deviceId': deviceId,
+      'nonce': nonce,
+      'sign': sign,
+      'timestamp': timestamp,
+      'Content-Type': 'application/json',
+    };
+
+    try {
+      const response = await fetch(`${API_DOMAIN}/ai-search/chatApi/v1/chat`, {
+        method: 'POST',
+        headers,
+        body: JSON.stringify(payload),
+      });
+
+      if (!response.ok) {
+        const error = await response.text();
+        console.error('HTTP Error:', response.status, error);
+        yield { error: `HTTP ${response.status}: ${error}` };
+        return;
+      }
+
+      const reader = response.body!.getReader();
+      const decoder = new TextDecoder();
+      let buffer = '';
+      let cardMessages: string[] = [];
+
+      while (true) {
+        const { done, value } = await reader.read();
+        if (done) break;
+
+        buffer += decoder.decode(value, { stream: true });
+        const lines = buffer.split('\n');
+        buffer = lines.pop() || '';
+
+        for (const line of lines) {
+          if (!line.startsWith(this.dataPrefix)) continue;
+
+          try {
+            const data = JSON.parse(line.slice(this.dataPrefix.length));
+            if (data.type === 'answer') {
+              const content = data.content;
+              const contentType = data.content_type;
+
+              if (thinkingState.thinking === -1 && contentType === 'thinking') {
+                thinkingState.thinking = 0;
+                yield { choices: [{ delta: { content: '<think>\n\n' }, finish_reason: null }] };
+              } else if (thinkingState.thinking === 0 && contentType === 'text') {
+                thinkingState.thinking = 1;
+                yield { choices: [{ delta: { content: '\n' }, finish_reason: null }] };
+                yield { choices: [{ delta: { content: '</think>' }, finish_reason: null }] };
+                yield { choices: [{ delta: { content: '\n\n' }, finish_reason: null }] };
+              }
+
+              if (contentType === 'card') {
+                try {
+                  const cardContent = JSON.parse(content);
+                  const cardItems = cardContent.cardInfo.cardItems;
+                  let markdownOutput = '\n\n---\n\n';
+
+                  const searchKeywords = cardItems.find((item: any) => item.type === '2001');
+                  if (searchKeywords) {
+                    const keywords = JSON.parse(searchKeywords.content);
+                    markdownOutput += `搜索关键字：${keywords.join('; ')}\n\n`;
+                  }
+
+                  const searchResults = cardItems.find((item: any) => item.type === '2002');
+                  if (searchResults) {
+                    const results = JSON.parse(searchResults.content);
+                    markdownOutput += `共找到 ${results.length} 个搜索结果：\n\n`;
+                    
+                    results.forEach((result: any) => {
+                      markdownOutput += `[${result.idIndex}] [${result.name}](${result.url})  来源：${result.siteName}\n`;
+                    });
+                  }
+
+                  cardMessages.push(markdownOutput);
+                } catch (e) {
+                  console.error('Error processing card:', e);
+                }
+              }
+
+              if (content && (contentType === 'text' || contentType === 'thinking')) {
+                yield { choices: [{ delta: { content }, finish_reason: null }] };
+              }
+            }
+          } catch (e) {
+            console.error('Parse error:', e, 'Line:', line);
+            yield { error: `JSONDecodeError: ${(e as Error).message}` };
+            return;
+          }
+        }
+      }
+
+      if (cardMessages.length > 0) {
+        yield { choices: [{ delta: { content: cardMessages.join('') }, finish_reason: null }] };
+      }
+
+      yield {
+        choices: [{
+          delta: {
+            meta: {
+              device_id: deviceId,
+              conversation_id: conversationId
+            }
+          },
+          finish_reason: null
+        }]
+      };
+
+    } catch (e) {
+      console.error('Error in pipe:', e);
+      yield { error: `${(e as Error).name}: ${(e as Error).message}` };
+    }
+  }
+
+  nanoid(size = 21) {
+    const urlAlphabet = 'useandom26T198340PX75pxJACKVERYMINDBUSHWOLF_GQZbfghjklqvwyzrict';
+    const bytes = new Uint8Array(size);
+    crypto.getRandomValues(bytes);
+    return Array.from(bytes).reverse().map(b => urlAlphabet[b & 63]).join('');
+  }
+
+  async generateSign(timestamp: string, payload: any, nonce: string) {
+    const payloadStr = JSON.stringify(payload);
+    const signStr = `${timestamp}${payloadStr}${nonce}`;
+    console.log('Sign string:', signStr);
+    
+    // 使用 Deno 标准库的 MD5
+    const sign = new Md5()
+      .update(signStr)
+      .toString()
+      .toUpperCase();
+    
+    console.log('Generated sign:', sign);
+    return sign;
+  }
+}
+
+const pipe = new Pipe();
+
+// 验证 API 密钥
+function verifyApiKey(request: Request) {
+  const authorization = request.headers.get('Authorization');
+  if (!authorization) {
+    return new Response(JSON.stringify({ error: 'Missing API key' }), {
+      status: 401,
+      headers: {
+        'Content-Type': 'application/json',
+        'Access-Control-Allow-Origin': '*',
+      },
+    });
+  }
+
+  const apiKey = authorization.replace('Bearer ', '').trim();
+  if (apiKey !== VALID_API_KEY) {
+    return new Response(JSON.stringify({ error: 'Invalid API key' }), {
+      status: 401,
+      headers: {
+        'Content-Type': 'application/json',
+        'Access-Control-Allow-Origin': '*',
+      },
+    });
+  }
+
+  return null;
+}
+
+async function handleRequest(request: Request) {
+  const url = new URL(request.url);
+
+  // 添加根路径处理
+  if (request.method === 'GET' && url.pathname === '/') {
+    return new Response("it's work!", {
+      headers: {
+        'Content-Type': 'text/plain',
+        'Access-Control-Allow-Origin': '*',
+      },
+    });
+  }
+
+  if (request.method === 'OPTIONS') {
+    return new Response(null, {
+      headers: {
+        'Access-Control-Allow-Origin': '*',
+        'Access-Control-Allow-Methods': 'GET, POST, OPTIONS',
+        'Access-Control-Allow-Headers': 'Content-Type, Authorization',
+      },
+    });
+  }
+
+  // 验证 API 密钥（除了 OPTIONS 请求）
+  const authError = verifyApiKey(request);
+  if (authError) return authError;
+
+  if (request.method === 'GET' && url.pathname === '/v1/models') {
+    const currentTime = Math.floor(Date.now() / 1000);
+    return new Response(JSON.stringify({
+      object: 'list',
+      data: [
+        // Original models
+        {
+          id: 'DeepSeek-R1',
+          object: 'model',
+          created: currentTime,
+          owned_by: 'library'
+        },
+        {
+          id: 'DeepSeek-V3',
+          object: 'model',
+          created: currentTime,
+          owned_by: 'library'
+        },
+        {
+          id: 'Doubao',
+          object: 'model',
+          created: currentTime,
+          owned_by: 'library'
+        },
+        {
+          id: 'Qwen',
+          object: 'model',
+          created: currentTime,
+          owned_by: 'library'
+        },
+        {
+          id: 'Glm3',
+          object: 'model',
+          created: currentTime,
+          owned_by: 'library'
+        },
+        {
+          id: 'Moonshot_v1',
+          object: 'model',
+          created: currentTime,
+          owned_by: 'library'
+        },
+        // Search-enabled models
+        {
+          id: 'DeepSeek-R1-Search',
+          object: 'model',
+          created: currentTime,
+          owned_by: 'library',
+          features: ['online_search']
+        },
+        {
+          id: 'DeepSeek-V3-Search',
+          object: 'model',
+          created: currentTime,
+          owned_by: 'library',
+          features: ['online_search']
+        },
+        {
+          id: 'Doubao-Search',
+          object: 'model',
+          created: currentTime,
+          owned_by: 'library',
+          features: ['online_search']
+        },
+        {
+          id: 'Qwen-Search',
+          object: 'model',
+          created: currentTime,
+          owned_by: 'library',
+          features: ['online_search']
+        },
+        {
+          id: 'Glm3-Search',
+          object: 'model',
+          created: currentTime,
+          owned_by: 'library',
+          features: ['online_search']
+        },
+        {
+          id: 'Moonshot_v1-Search',
+          object: 'model',
+          created: currentTime,
+          owned_by: 'library',
+          features: ['online_search']
+        }
+      ]
+    }), {
+      headers: {
+        'Content-Type': 'application/json',
+        'Access-Control-Allow-Origin': '*',
+      },
+    });
+  }
+
+  if (request.method === 'POST' && url.pathname === '/v1/chat/completions') {
+    const body = await request.json();
+    const isStream = body.stream || false;
+
+    if (isStream) {
+      const stream = new ReadableStream({
+        async start(controller) {
+          try {
+            for await (const chunk of pipe.pipe(body)) {
+              controller.enqueue(new TextEncoder().encode(`data: ${JSON.stringify(chunk)}\n\n`));
+            }
+            controller.enqueue(new TextEncoder().encode('data: [DONE]\n\n'));
+            controller.close();
+          } catch (e) {
+            console.error('Error in stream:', e);
+            controller.error(e);
+          }
+        },
+      });
+
+      return new Response(stream, {
+        headers: {
+          'Content-Type': 'text/event-stream',
+          'Cache-Control': 'no-cache',
+          'Connection': 'keep-alive',
+          'Access-Control-Allow-Origin': '*',
+        },
+      });
+    }
+
+    if (!isStream) {
+      let content = '';
+      let meta = null;
+      let thinking_content: string[] = [];
+      let is_thinking = false;
+      
+      try {
+        for await (const chunk of pipe.pipe(body)) {
+          if (chunk.choices?.[0]?.delta?.content) {
+            const content_chunk = chunk.choices[0].delta.content;
+            if (content_chunk === '<think>\n\n') {
+              is_thinking = true;
+            } else if (content_chunk === '\n</think>\n\n') {
+              is_thinking = false;
+            } else if (is_thinking) {
+              thinking_content.push(content_chunk);
+            } else {
+              content += content_chunk;
+            }
+          }
+          if (chunk.choices?.[0]?.delta?.meta) {
+            meta = chunk.choices[0].delta.meta;
+          }
+        }
+
+        // 处理思考内容
+        const reasoningContent = thinking_content.join('');
+        
+        return new Response(JSON.stringify({
+          id: crypto.randomUUID(),
+          object: 'chat.completion',
+          created: Math.floor(Date.now() / 1000),
+          model: body.model,
+          choices: [{
+            message: {
+              role: 'assistant',
+              reasoning_content: reasoningContent ? `<think>\n${reasoningContent}\n</think>` : '',
+              content: content.trim(),
+              meta: meta
+            },
+            finish_reason: 'stop'
+          }]
+        } as NonStreamResponse), {
+          headers: {
+            'Content-Type': 'application/json',
+            'Access-Control-Allow-Origin': '*',
+          },
+        });
+      } catch (e) {
+        console.error('Error processing chat request:', e);
+        return new Response(JSON.stringify({ error: 'Internal Server Error' }), {
+          status: 500,
+          headers: {
+            'Content-Type': 'application/json',
+            'Access-Control-Allow-Origin': '*',
+          },
+        });
+      }
+    }
+  }
+
+  return new Response('Not Found', { status: 404 });
+}
+
+serve(handleRequest, { port: 8787 });
+
+interface Message {
+  role: string;
+  content: string;
+}
+
+interface ChatRequest {
+  model: string;
+  messages: Message[];
+  stream: boolean;
+  temperature?: number;
+  top_p?: number;
+  n?: number;
+  max_tokens?: number;
+  presence_penalty?: number;
+  frequency_penalty?: number;
+  user?: string;
+}
+
+interface DeltaContent {
+  content?: string;
+  meta?: {
+    device_id: string;
+    conversation_id: string;
+  };
+}
+
+interface Choice {
+  delta: DeltaContent;
+  finish_reason: string | null;
+}
+
+interface StreamResponse {
+  choices?: Choice[];
+  error?: string;
+}
+
+interface NonStreamResponse {
+  id: string;
+  object: string;
+  created: number;
+  model: string;
+  choices: Array<{
+    message: {
+      role: string;
+      reasoning_content: string;
+      content: string;
+      meta: {
+        device_id: string;
+        conversation_id: string;
+      };
+    };
+    finish_reason: string;
+  }>;
+}