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process from \"node:process\";\n\nconst BASE_COST = 200;\nconst POE_ACCESS_KEY = process.env.POE_API_KEY;\n\ninterface ModelConfig {\n provider: \"openrouter\";\n model: string;\n endpoint: string;\n headers: Record;\n priority: number;\n}\n\nconst MODELS: ModelConfig[] = [\n {\n provider: \"openrouter\",\n model: \"openrouter/polaris-alpha\", \n endpoint: \"https://openrouter.ai/api/v1/chat/completions\",\n headers: {\n \"Authorization\": `Bearer ${process.env.OPEN_ROUTER_API_KEY}`,\n \"Content-Type\": \"application/json\",\n \"HTTP-Referer\": process.env.HTTP_REFERER || \"https://localhost:3000\"\n },\n priority: 1,\n },\n {\n provider: \"openrouter\",\n model: \"google/gemini-2.0-flash-exp:free\",\n endpoint: \"https://openrouter.ai/api/v1/chat/completions\",\n headers: {\n \"Authorization\": `Bearer ${process.env.OPEN_ROUTER_API_KEY}`,\n \"Content-Type\": \"application/json\",\n \"HTTP-Referer\": process.env.HTTP_REFERER || \"https://localhost:3000\"\n },\n priority: 2,\n },\n {\n provider: \"openrouter\",\n model: \"google/gemini-2.0-flash-lite-001\",\n endpoint: \"https://openrouter.ai/api/v1/chat/completions\",\n headers: {\n \"Authorization\": `Bearer ${process.env.OPEN_ROUTER_API_KEY}`,\n \"Content-Type\": \"application/json\",\n \"HTTP-Referer\": process.env.HTTP_REFERER || \"https://localhost:3000\"\n },\n priority: 3,\n },\n {\n provider: \"openrouter\",\n model: \"mistralai/ministral-3b\",\n endpoint: \"https://openrouter.ai/api/v1/chat/completions\",\n headers: {\n \"Authorization\": `Bearer ${process.env.OPEN_ROUTER_API_KEY}`,\n \"Content-Type\": \"application/json\",\n \"HTTP-Referer\": process.env.HTTP_REFERER || \"https://localhost:3000\"\n },\n priority: 4,\n },\n];\n\nconst FAST_MODEL: ModelConfig = MODELS[2];\nconst FILE_ANALYSIS_MODELS: ModelConfig[] = [MODELS[1], MODELS[3]];\n\nfunction verifyPoeAuth(req: Request): boolean {\n const authHeader = req.headers.get(\"Authorization\");\n if (!POE_ACCESS_KEY) {\n console.error(\"POE_API_KEY not configured\");\n return false;\n }\n if (!authHeader) {\n console.error(\"No Authorization header provided\");\n return false;\n }\n const expectedAuth = `Bearer ${POE_ACCESS_KEY}`;\n if (authHeader !== expectedAuth) {\n console.error(\"Invalid POE_API_KEY\");\n return false;\n }\n return true;\n}\n\nfunction hasAttachments(query: Query): boolean {\n return query.query.some(msg => msg.attachments && msg.attachments.length > 0);\n}\n\nfunction isShortInput(messages: Array<{ role: string; content: string }>): boolean {\n const lastUserMessage = messages.filter((m) => m.role === \"user\").pop();\n return lastUserMessage ? lastUserMessage.content.length <= 20 : false;\n}\n\nfunction isMediumInput(messages: Array<{ role: string; content: string }>): boolean {\n const lastUserMessage = messages.filter((m) => m.role === \"user\").pop();\n return lastUserMessage ? lastUserMessage.content.length <= 200 : false;\n}\n\nasync function makeRequest(config: ModelConfig, messages: Array<{ role: string; content: string }>, isShort: boolean = false): Promise {\n const maxTokens = isShort ? 512 : 1536;\n const temperature = isShort ? 0.3 : 0.5;\n return fetch(config.endpoint, {\n method: \"POST\",\n headers: config.headers,\n body: JSON.stringify({\n model: config.model,\n messages: messages,\n stream: true,\n max_tokens: maxTokens,\n temperature: temperature,\n top_p: 0.8,\n frequency_penalty: 0.1,\n presence_penalty: 0.1,\n }),\n });\n}\n\nasync function processStreamOptimized(response: Response, send: SendEventFn): Promise {\n if (!response.body) {\n throw new Error(\"No response body\");\n }\n const reader = response.body.getReader();\n const decoder = new TextDecoder();\n let buffer = \"\";\n let firstTokenSent = false;\n try {\n while (true) {\n const { done, value } = await reader.read();\n if (done) break;\n buffer += decoder.decode(value, { stream: true });\n const lines = buffer.split(\"\\n\");\n buffer = lines.pop() || \"\";\n for (const line of lines) {\n if (line.startsWith(\"data: \")) {\n const data = line.slice(6).trim();\n if (data === \"[DONE]\") continue;\n if (!data) continue;\n try {\n const parsed = JSON.parse(data);\n const content = parsed.choices?.[0]?.delta?.content;\n if (content) {\n if (!firstTokenSent) {\n send(\"text\", { text: content });\n firstTokenSent = true;\n } else {\n send(\"text\", { text: content });\n }\n }\n } catch (e) {\n console.error(\"Parse error:\", e, \"Data:\", data);\n }\n }\n }\n }\n } finally {\n reader.releaseLock();\n }\n}\n\nasync function requestWithTimeout(promise: Promise, timeoutMs: number = 5000): Promise {\n const timeoutPromise = new Promise((_, reject) =>\n setTimeout(() => reject(new Error(\"Request timeout\")), timeoutMs)\n );\n return Promise.race([promise, timeoutPromise]);\n}\n\nasync function getResponse(req: Query, send: SendEventFn) {\n send(\"meta\", { content_type: \"text/markdown\" });\n const messages = req.query.map((msg) => ({\n role: msg.role === \"bot\" ? \"assistant\" : msg.role as \"user\" | \"assistant\" | \"system\",\n content: msg.content,\n }));\n const isShort = isShortInput(messages);\n const isMedium = isMediumInput(messages);\n const hasFiles = hasAttachments(req);\n let modelsToTry: ModelConfig[];\n if (hasFiles) {\n modelsToTry = FILE_ANALYSIS_MODELS;\n } else if (isShort) {\n modelsToTry = [FAST_MODEL];\n } else if (isMedium) {\n modelsToTry = MODELS.slice(0, 2);\n } else {\n modelsToTry = MODELS;\n }\n for (let i = 0; i < modelsToTry.length; i++) {\n const config = modelsToTry[i];\n let response: Response | null = null;\n try {\n const requestPromise = makeRequest(config, messages, isShort);\n response = await requestWithTimeout(requestPromise, isShort ? 3000 : 8000);\n if (!response.ok) {\n const errorText = await response.text().catch(() => \"Unknown error\");\n console.error(`Model ${config.model} failed with status ${response.status}: ${errorText}`);\n if (i === modelsToTry.length - 1) {\n throw new Error(`All models failed. Last error: ${response.status} - ${errorText}`);\n }\n continue;\n }\n await processStreamOptimized(response, send);\n return;\n } catch (error) {\n if (response?.body) {\n try {\n await response.body.cancel();\n } catch (e) {\n console.warn(\"Error canceling response body:\", e);\n }\n }\n if (i === modelsToTry.length - 1) {\n console.error(\"All models failed:\", error);\n send(\"error\", { text: `Error: ${error.message}`, allow_retry: true });\n break;\n }\n console.warn(`Model ${config.model} failed: ${error.message} - trying next model`);\n }\n }\n send(\"done\", {});\n}\n\nasync function getBotSettings(): Promise {\n const rateCard = \"| Type | Price |\\n\" + \"|------|------|\\n\" + `| Message Cost | ${BASE_COST} points |\\n`;\n const costLabel = `${BASE_COST} points`;\n return {\n allow_attachments: true,\n expand_text_attachments: true,\n enable_multi_bot_chat_prompting: true,\n enable_suggested_replies: true,\n rate_card: rateCard,\n cost_label: costLabel,\n supports_system_messages: true,\n suggested_replies: true\n };\n}\n\ntype BotSettings = {\n allow_attachments?: boolean;\n expand_text_attachments?: boolean;\n enable_multi_bot_chat_prompting?: boolean;\n enable_suggested_replies?: boolean;\n rate_card?: string;\n cost_label?: string;\n supports_system_messages?: boolean;\n suggested_replies?: boolean;\n};\n\ntype Query = {\n version: string;\n type: \"query\";\n query: {\n role: \"system\" | \"user\" | \"bot\";\n content: string;\n content_type: string;\n timestamp: number;\n message_id: string;\n feedback: {\n type: \"like\" | \"dislike\";\n reason?: string;\n }[];\n attachments: {\n url: string;\n content_type: string;\n name: string;\n parsed_content?: string;\n }[];\n }[];\n message_id: string;\n user_id: string;\n conversation_id: string;\n metadata: string;\n language_code: string;\n};\n\ntype Events = {\n meta: { content_type: string };\n text: { text: string };\n replace_response: { text: string };\n suggested_reply: { text: string };\n error: { allow_retry?: boolean; text: string };\n done: {};\n};\n\ntype SendEventFn = (eventName: EventName, data: Events[EventName]) => void;\n\nfunction encodeEvent(event: string, data: any = {}) {\n return new TextEncoder().encode(`event: ${event}\\ndata: ${JSON.stringify(data)}\\n\\n`);\n}\n\nexport default async function (req: Request): Promise {\n if (!verifyPoeAuth(req)) {\n return new Response(JSON.stringify({ error: \"Unauthorized\", message: \"Invalid or missing POE_API_KEY\" }), {\n status: 401,\n headers: { \"Content-Type\": \"application/json\" },\n });\n }\n const reqBody = await req.json().catch((e) => {\n console.error(\"body parse error\", e);\n return {};\n });\n console.log(\"body\", reqBody);\n if (reqBody.type === \"settings\") {\n return new Response(JSON.stringify(await getBotSettings()), {\n status: 200,\n headers: { \"Content-Type\": \"application/json\" },\n });\n }\n const body = new ReadableStream({\n start(controller) {\n const send = (event, data) => {\n controller.enqueue(encodeEvent(event, data));\n };\n return getResponse(reqBody, send).catch((e) => console.error(\"get response error\", e)).finally(() => controller.close());\n },\n });\n return new Response(body, {\n status: 200,\n headers: {\n \"Content-Type\": \"text/event-stream\",\n \"Cache-Control\": \"no-cache\",\n \"Connection\": \"keep-alive\",\n },\n });\n}","deleted","label",[98],"permalink","https://www.val.town/x/OpenSourceLab/Polaris-Alpha-Vers/code/main.tsx","extension","actionData","errors"]