158 lines
5.8 KiB
Python
158 lines
5.8 KiB
Python
from fastapi import APIRouter, HTTPException, Depends
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from typing import Dict, Any
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import httpx
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import json
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import logging
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from config import settings
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from api.ai_schemas import AIGenerationRequest, AITaskResponse, AITaskResult
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router = APIRouter()
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logger = logging.getLogger(__name__)
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DASHSCOPE_API_URL = "https://dashscope.aliyuncs.com/api/v1/services/aigc/multimodal-generation/generation"
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DASHSCOPE_TASK_URL = "https://dashscope.aliyuncs.com/api/v1/tasks"
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@router.post("/generate", response_model=AITaskResponse, summary="提交AI图片生成任务")
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async def generate_image(request: AIGenerationRequest):
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"""
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提交AI图片生成任务，使用阿里云DashScope服务
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"""
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if not settings.dashscope_api_key:
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raise HTTPException(status_code=500, detail="DashScope API Key not configured")
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headers = {
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"Content-Type": "application/json",
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"Authorization": f"Bearer {settings.dashscope_api_key}",
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"X-DashScope-Async": "enable" # 确保异步任务提交
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}
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# 构建请求体
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payload = {
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"model": request.model,
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"input": {
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"messages": [
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{
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"role": "user",
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"content": [
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{
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"text": request.prompt
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}
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]
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}
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]
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},
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"parameters": {
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"prompt_extend": True,
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"watermark": False,
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"n": request.n,
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"size": request.size
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}
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}
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if request.negative_prompt:
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payload["parameters"]["negative_prompt"] = request.negative_prompt
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try:
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async with httpx.AsyncClient() as client:
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response = await client.post(
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DASHSCOPE_API_URL,
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headers=headers,
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json=payload,
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timeout=30.0
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)
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if response.status_code != 200:
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logger.error(f"DashScope API error: {response.text}")
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try:
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error_detail = response.json()
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except:
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error_detail = {"message": response.text}
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raise HTTPException(status_code=response.status_code, detail=error_detail)
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result = response.json()
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# 检查是否有task_id，因为如果是同步返回可能没有task_id，但在这种模型通常是异步的
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# 这里的curl示例似乎是直接返回task_id
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if "output" in result and "task_id" in result["output"]:
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task_id = result["output"]["task_id"]
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elif "task_id" in result: # 或者是这种结构
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task_id = result["task_id"]
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else:
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# 有些情况下直接返回 output.task_id
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# 根据文档 https://help.aliyun.com/zh/dashscope/developer-reference/api-details-10
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# 异步提交返回结构通常包含 output.task_id
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if "output" in result and "task_id" in result["output"]:
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task_id = result["output"]["task_id"]
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else:
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# 如果是同步返回，可能直接给结果，或者结构不同
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# 但 wan2.6-t2i 通常是异步任务
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logger.warning(f"Unexpected response structure: {result}")
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# 尝试直接取，或者抛错
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# 假设是标准异步结构
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task_id = result.get("output", {}).get("task_id")
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if not task_id:
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raise HTTPException(status_code=500, detail="Failed to retrieve task_id from DashScope response")
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return AITaskResponse(
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task_id=task_id,
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request_id=result.get("request_id")
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)
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except httpx.RequestError as e:
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logger.error(f"Request error: {str(e)}")
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raise HTTPException(status_code=500, detail=f"Request failed: {str(e)}")
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@router.get("/tasks/{task_id}", response_model=AITaskResult, summary="查询AI任务结果")
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async def get_task_result(task_id: str):
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"""
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查询AI生成任务的结果
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"""
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if not settings.dashscope_api_key:
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raise HTTPException(status_code=500, detail="DashScope API Key not configured")
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headers = {
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"Authorization": f"Bearer {settings.dashscope_api_key}"
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}
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try:
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async with httpx.AsyncClient() as client:
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response = await client.get(
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f"{DASHSCOPE_TASK_URL}/{task_id}",
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headers=headers,
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timeout=30.0
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)
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if response.status_code != 200:
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logger.error(f"DashScope Task API error: {response.text}")
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raise HTTPException(status_code=response.status_code, detail="Failed to fetch task status")
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result = response.json()
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# 构建返回结果
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# DashScope 任务查询返回结构：
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# {
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# "request_id": "...",
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# "output": {
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# "task_id": "...",
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# "task_status": "SUCCEEDED",
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# "results": [...]
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# },
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# "usage": ...
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# }
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task_status = result.get("output", {}).get("task_status", "UNKNOWN")
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return AITaskResult(
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task_id=task_id,
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status=task_status,
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code=result.get("code"),
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message=result.get("message"),
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output=result.get("output"),
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usage=result.get("usage")
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)
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except httpx.RequestError as e:
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logger.error(f"Request error: {str(e)}")
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raise HTTPException(status_code=500, detail=f"Request failed: {str(e)}")
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