api/utils.py

from datetime import datetime
import json
from typing import Any, Dict, Optional
import uuid

import httpx
from api import validate
from api.config import MODEL_MAPPING, headers
from fastapi import Depends, security, HTTPException
from fastapi.security import HTTPAuthorizationCredentials

from api.config import APP_SECRET, BASE_URL
from api.models import ChatRequest

from api.logger import setup_logger

logger = setup_logger(__name__)


def create_chat_completion_data(
    content: str, model: str, timestamp: int, finish_reason: Optional[str] = None
) -> Dict[str, Any]:
    return {
        "id": f"chatcmpl-{uuid.uuid4()}",
        "object": "chat.completion.chunk",
        "created": timestamp,
        "model": model,
        "choices": [
            {
                "index": 0,
                "delta": {"content": content, "role": "assistant"},
                "finish_reason": finish_reason,
            }
        ],
        "usage": None,
    }


def verify_app_secret(credentials: HTTPAuthorizationCredentials = Depends(security)):
    if credentials.credentials != APP_SECRET:
        raise HTTPException(status_code=403, detail="Invalid APP_SECRET")
    return credentials.credentials


def message_to_dict(message):
    if isinstance(message.content, str):
        return {"role": message.role, "content": message.content}
    elif isinstance(message.content, list) and len(message.content) == 2:
        if "image_url" in message.content[1]:
            return {
                "role": message.role,
                "content": message.content[0]["text"],
                "data": {
                    "imageBase64": message.content[1]["image_url"]["url"],
                    "fileText": "",
                    "title": "snapshoot",
                },
            }
        else:
            return {
                "role": message.role,
                "content": message.content[0]["text"],
                "data": {
                    "imageBase64": "",
                    "fileText": "",
                    "title": "snapshoot",
                },
            }
    else:
        return {"role": message.role, "content": message.content}


async def process_streaming_response(request: ChatRequest):
    json_data = {
        "messages": [message_to_dict(msg) for msg in request.messages],
        "previewToken": None,
        "userId": None,
        "codeModelMode": True,
        "agentMode": {},
        "trendingAgentMode": {},
        "isMicMode": False,
        "userSystemPrompt": None,
        "maxTokens": request.max_tokens,
        "playgroundTopP": request.top_p,
        "playgroundTemperature": request.temperature,
        "isChromeExt": False,
        "githubToken": None,
        "clickedAnswer2": False,
        "clickedAnswer3": False,
        "clickedForceWebSearch": False,
        "visitFromDelta": False,
        "mobileClient": False,
        "userSelectedModel": MODEL_MAPPING.get(request.model),
        "validated": validate.getHid()
    }

    async with httpx.AsyncClient() as client:
        try:
            async with client.stream(
                "POST",
                f"{BASE_URL}/api/chat",
                headers=headers,
                json=json_data,
                timeout=100,
            ) as response:
                try:
                    response.raise_for_status()
                    async for line in response.aiter_lines():
                        timestamp = int(datetime.now().timestamp())
                        if line:
                            content = line + "\n"
                            if "https://www.blackbox.ai" in content:
                                validate.getHid(True)
                                content = "hid已刷新,重新对话即可\n"
                                yield f"data: {json.dumps(create_chat_completion_data(content, request.model, timestamp))}\n\n"
                                break
                            if content.startswith("$@$v=undefined-rv1$@$"):
                                yield f"data: {json.dumps(create_chat_completion_data(content[21:], request.model, timestamp))}\n\n"
                            else:
                                yield f"data: {json.dumps(create_chat_completion_data(content, request.model, timestamp))}\n\n"

                    yield f"data: {json.dumps(create_chat_completion_data('', request.model, timestamp, 'stop'))}\n\n"
                    yield "data: [DONE]\n\n"
                except httpx.HTTPStatusError as e:
                    logger.error(f"HTTP error occurred: {e}")
                    error_message = "抱歉，服务器暂时无法处理您的请求。请稍后重试。"
                    timestamp = int(datetime.now().timestamp())
                    yield f"data: {json.dumps(create_chat_completion_data(error_message, request.model, timestamp))}\n\n"
                    yield f"data: {json.dumps(create_chat_completion_data('', request.model, timestamp, 'stop'))}\n\n"
                    yield "data: [DONE]\n\n"
        except httpx.RequestError as e:
            logger.error(f"Error occurred during request: {e}")
            error_message = "抱歉，连接服务器时出现错误。请检查网络连接并重试。"
            timestamp = int(datetime.now().timestamp())
            yield f"data: {json.dumps(create_chat_completion_data(error_message, request.model, timestamp))}\n\n"
            yield f"data: {json.dumps(create_chat_completion_data('', request.model, timestamp, 'stop'))}\n\n"
            yield "data: [DONE]\n\n"


async def process_non_streaming_response(request: ChatRequest):
    json_data = {
        "messages": [message_to_dict(msg) for msg in request.messages],
        "previewToken": None,
        "userId": None,
        "codeModelMode": True,
        "agentMode": {},
        "trendingAgentMode": {},
        "isMicMode": False,
        "userSystemPrompt": None,
        "maxTokens": request.max_tokens,
        "playgroundTopP": request.top_p,
        "playgroundTemperature": request.temperature,
        "isChromeExt": False,
        "githubToken": None,
        "clickedAnswer2": False,
        "clickedAnswer3": False,
        "clickedForceWebSearch": False,
        "visitFromDelta": False,
        "mobileClient": False,
        "userSelectedModel": MODEL_MAPPING.get(request.model),
        "validated": validate.getHid()
    }
    full_response = ""
    async with httpx.AsyncClient() as client:
        async with client.stream(
            method="POST", url=f"{BASE_URL}/api/chat", headers=headers, json=json_data
        ) as response:
            async for chunk in response.aiter_text():
                full_response += chunk
    if "https://www.blackbox.ai" in full_response:
        validate.getHid(True)
        full_response = "hid已刷新，重新对话即可"
    if full_response.startswith("$@$v=undefined-rv1$@$"):
        full_response = full_response[21:]
    return {
        "id": f"chatcmpl-{uuid.uuid4()}",
        "object": "chat.completion",
        "created": int(datetime.now().timestamp()),
        "model": request.model,
        "choices": [
            {
                "index": 0,
                "message": {"role": "assistant", "content": full_response},
                "finish_reason": "stop",
            }
        ],
        "usage": None,
    }