253 lines
8.9 KiB
Python
253 lines
8.9 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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海报生成引擎 V2
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- 不访问数据库，接收完整数据
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- 图片使用 URL 而非 Base64
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- 使用轻量 PosterServiceV2
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"""
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import logging
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from typing import Dict, Any, Optional, List
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import aiohttp
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import base64
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from io import BytesIO
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from .base import BaseAIGCEngine, EngineResult
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logger = logging.getLogger(__name__)
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class PosterGenerateEngineV2(BaseAIGCEngine):
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"""
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海报生成引擎 V2
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改进:
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1. 不访问数据库，所有数据由调用方传入
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2. 图片使用 URL 下载，而非 Base64 传输
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3. 使用轻量 PosterServiceV2 (无数据库依赖)
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"""
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engine_id = "poster_generate"
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engine_name = "海报生成"
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version = "2.1.0"
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description = "根据内容和模板生成营销海报"
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def __init__(self):
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super().__init__()
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self._poster_service = None
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def get_param_schema(self) -> Dict[str, Any]:
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"""定义参数结构"""
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return {
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# 模板
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"template_id": {
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"type": "str",
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"required": True,
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"desc": "海报模板 ID",
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},
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# 内容
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"content": {
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"type": "object",
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"required": True,
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"desc": "海报内容 {title, content, tag}",
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},
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# 完整对象 (由 Java 端传入)
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"scenic_spot": {
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"type": "object",
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"required": False,
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"desc": "景区信息对象 {id, name, description, ...}",
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},
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"product": {
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"type": "object",
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"required": False,
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"desc": "产品信息对象 {id, name, price, ...}",
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},
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# 图片 - 使用 URL 而非 Base64
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"image_urls": {
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"type": "list",
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"required": False,
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"desc": "图片 URL 列表 (优先使用)",
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},
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"image_paths": {
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"type": "list",
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"required": False,
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"desc": "图片本地路径列表 (共享存储场景)",
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},
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"images_base64": {
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"type": "list",
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"required": False,
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"desc": "图片 Base64 列表 (兼容旧接口，不推荐)",
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},
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# 生成选项
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"force_llm": {
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"type": "bool",
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"required": False,
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"default": False,
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"desc": "是否强制使用 LLM 生成内容",
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},
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"generate_psd": {
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"type": "bool",
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"required": False,
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"default": False,
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"desc": "是否生成 PSD 文件",
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},
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"generate_fabric_json": {
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"type": "bool",
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"required": False,
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"default": False,
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"desc": "是否生成 Fabric.js JSON",
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},
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}
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def estimate_duration(self, params: Dict[str, Any]) -> int:
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"""预估执行时间"""
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generate_psd = params.get('generate_psd', False)
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return 45 if generate_psd else 30
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async def execute(self, params: Dict[str, Any], task_id: str = None) -> EngineResult:
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"""执行海报生成"""
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try:
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self.log("开始生成海报 (V2)")
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self.set_progress(task_id, 10)
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# 提取参数
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template_id = params.get('template_id')
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content = params.get('content', {})
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scenic_spot = params.get('scenic_spot')
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product = params.get('product')
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image_urls = params.get('image_urls', [])
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image_paths = params.get('image_paths', [])
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images_base64 = params.get('images_base64', [])
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force_llm = params.get('force_llm', False)
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generate_psd = params.get('generate_psd', False)
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generate_fabric_json = params.get('generate_fabric_json', False)
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if not template_id:
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return EngineResult(
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success=False,
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error="缺少模板 ID",
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error_code="MISSING_TEMPLATE"
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)
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self.set_progress(task_id, 20)
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# 获取图片 (优先级: URL > 路径 > Base64)
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final_images_base64 = []
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if image_urls:
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self.log(f"从 URL 下载 {len(image_urls)} 张图片...")
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final_images_base64 = await self._download_images(image_urls)
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elif image_paths:
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self.log(f"从路径读取 {len(image_paths)} 张图片...")
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final_images_base64 = self._read_images_from_paths(image_paths)
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elif images_base64:
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self.log(f"使用传入的 {len(images_base64)} 张 Base64 图片")
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final_images_base64 = images_base64
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self.set_progress(task_id, 40)
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# 调用海报服务 (使用轻量 V2 服务)
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poster_service = self._get_poster_service()
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result = poster_service.generate_poster(
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template_id=template_id,
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content=content,
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images_base64=final_images_base64,
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generate_fabric_json=generate_fabric_json,
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)
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self.set_progress(task_id, 80)
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# 处理结果
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if not result.get('success'):
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return EngineResult(
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success=False,
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error=result.get('error', '海报生成失败'),
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error_code="GENERATION_FAILED"
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)
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output_image = result.get('image_base64')
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fabric_json = result.get('fabric_json')
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if output_image:
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self.set_progress(task_id, 100)
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return EngineResult(
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success=True,
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data={
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"image_base64": output_image,
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"images_base64": [output_image],
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"fabric_json": fabric_json,
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"template_id": template_id,
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},
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metadata={
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"template_id": template_id,
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"has_fabric_json": bool(fabric_json),
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"image_source": "url" if image_urls else ("path" if image_paths else "base64"),
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}
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)
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else:
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return EngineResult(
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success=False,
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error="海报生成失败: 无输出图片",
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error_code="GENERATION_FAILED"
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)
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except Exception as e:
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self.log(f"海报生成异常: {e}", level='error')
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return EngineResult(
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success=False,
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error=str(e),
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error_code="EXECUTION_ERROR"
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)
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def _get_poster_service(self):
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"""获取海报服务 (使用轻量 V2 服务)"""
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if self._poster_service:
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return self._poster_service
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from domain.poster.poster_service import get_poster_service
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self._poster_service = get_poster_service()
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return self._poster_service
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async def _download_images(self, urls: List[str]) -> List[str]:
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"""从 URL 下载图片并转为 Base64"""
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images = []
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async with aiohttp.ClientSession() as session:
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for url in urls:
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try:
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async with session.get(url, timeout=aiohttp.ClientTimeout(total=30)) as response:
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if response.status == 200:
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image_bytes = await response.read()
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image_base64 = base64.b64encode(image_bytes).decode('utf-8')
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images.append(image_base64)
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self.log(f"下载图片成功: {url[:50]}...")
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else:
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self.log(f"下载图片失败: {url}, 状态码: {response.status}", level='warning')
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except Exception as e:
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self.log(f"下载图片异常: {url}, 错误: {e}", level='warning')
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return images
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def _read_images_from_paths(self, paths: List[str]) -> List[str]:
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"""从本地路径读取图片并转为 Base64"""
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images = []
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for path in paths:
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try:
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with open(path, 'rb') as f:
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image_bytes = f.read()
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image_base64 = base64.b64encode(image_bytes).decode('utf-8')
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images.append(image_base64)
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self.log(f"读取图片成功: {path}")
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except Exception as e:
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self.log(f"读取图片失败: {path}, 错误: {e}", level='warning')
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return images
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