450 lines
17 KiB
Python
450 lines
17 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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增强的API下载策略
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包含多个备用API端点和智能重试机制
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"""
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import asyncio
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import json
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import time
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import logging
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from typing import Dict, Optional, List, Any
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import aiohttp
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import requests
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from urllib.parse import urlparse
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from .base import IDownloadStrategy, DownloadTask, DownloadResult, TaskType, TaskStatus
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from apiproxy.douyin import douyin_headers
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from apiproxy.douyin.urls import Urls
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from apiproxy.douyin.result import Result
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from apiproxy.common.utils import Utils
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logger = logging.getLogger(__name__)
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class EnhancedAPIStrategy(IDownloadStrategy):
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"""增强的API下载策略，包含多个备用端点和智能重试"""
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def __init__(self, cookies: Optional[Dict] = None):
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self.urls = Urls()
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self.result = Result()
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self.utils = Utils() # 修正：直接使用Utils类
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self.cookies = cookies or {}
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self.session = None
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self.timeout = aiohttp.ClientTimeout(total=30)
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self.retry_delays = [1, 2, 5, 10] # 重试延迟时间（秒）
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@property
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def name(self) -> str:
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return "Enhanced API Strategy"
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def get_priority(self) -> int:
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"""API策略优先级最高"""
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return 100
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async def can_handle(self, task: DownloadTask) -> bool:
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"""判断是否可以处理任务"""
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# API策略可以处理所有类型的任务
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return True
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async def download(self, task: DownloadTask) -> DownloadResult:
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"""执行下载任务"""
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start_time = time.time()
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task.status = TaskStatus.PROCESSING
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try:
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# 根据任务类型选择下载方法
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if task.task_type == TaskType.VIDEO:
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result = await self._download_video(task)
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elif task.task_type == TaskType.USER:
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result = await self._download_user_content(task)
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elif task.task_type == TaskType.MIX:
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result = await self._download_mix(task)
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else:
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result = await self._download_generic(task)
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duration = time.time() - start_time
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result.duration = duration
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if result.success:
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task.status = TaskStatus.COMPLETED
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logger.info(f"任务 {task.task_id} 下载成功，耗时 {duration:.2f} 秒")
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else:
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task.status = TaskStatus.FAILED
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logger.error(f"任务 {task.task_id} 下载失败: {result.error_message}")
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return result
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except Exception as e:
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task.status = TaskStatus.FAILED
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task.error_message = str(e)
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logger.error(f"任务 {task.task_id} 执行异常: {e}")
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return DownloadResult(
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success=False,
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task_id=task.task_id,
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error_message=str(e),
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retry_count=task.retry_count
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)
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finally:
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await self._cleanup()
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async def _resolve_url(self, url: str) -> str:
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"""异步解析短链接"""
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if "v.douyin.com" in url:
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try:
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headers = {**douyin_headers}
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headers['User-Agent'] = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36'
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async with aiohttp.ClientSession(timeout=self.timeout) as session:
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async with session.get(url, headers=headers, allow_redirects=True) as response:
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if response.status == 200:
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final_url = str(response.url)
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logger.info(f"异步短链接解析成功: {url} -> {final_url}")
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return final_url
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else:
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logger.warning(f"异步短链接解析失败，状态码: {response.status}")
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except Exception as e:
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logger.warning(f"异步解析短链接异常: {e}")
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return url
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async def _download_video(self, task: DownloadTask) -> DownloadResult:
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"""下载单个视频"""
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# 先尝试异步解析URL
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resolved_url = await self._resolve_url(task.url)
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# 提取aweme_id
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aweme_id = self._extract_aweme_id(resolved_url)
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if not aweme_id:
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# 如果还是失败，尝试用原始URL
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aweme_id = self._extract_aweme_id(task.url)
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if not aweme_id:
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return DownloadResult(
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success=False,
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task_id=task.task_id,
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error_message="无法从URL提取视频ID"
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)
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# 尝试多个API端点
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methods = [
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self._try_detail_api,
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self._try_post_api,
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self._try_search_api,
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]
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for method in methods:
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try:
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data = await method(aweme_id)
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if data:
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# 解析并返回下载结果
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return await self._process_aweme_data(task, data)
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except Exception as e:
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logger.warning(f"方法 {method.__name__} 失败: {e}")
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continue
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return DownloadResult(
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success=False,
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task_id=task.task_id,
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error_message="所有API端点都失败"
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)
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async def _try_detail_api(self, aweme_id: str) -> Optional[Dict]:
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"""尝试使用详情API"""
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for attempt in range(3):
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try:
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params = self._build_detail_params(aweme_id)
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# 获取X-Bogus参数
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try:
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url = self.urls.POST_DETAIL + self.utils.getXbogus(params)
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except Exception as e:
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logger.warning(f"获取X-Bogus失败: {e}, 尝试不带X-Bogus")
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url = f"{self.urls.POST_DETAIL}?{params}"
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headers = {**douyin_headers}
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if self.cookies:
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headers['Cookie'] = self._build_cookie_string()
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async with aiohttp.ClientSession(timeout=self.timeout) as session:
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async with session.get(url, headers=headers) as response:
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if response.status != 200:
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logger.warning(f"详情API返回状态码: {response.status}")
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continue
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text = await response.text()
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if not text:
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logger.warning("详情API返回空响应")
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continue
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data = json.loads(text)
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if data.get('status_code') == 0 and 'aweme_detail' in data:
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return data['aweme_detail']
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logger.warning(f"详情API返回错误: {data.get('status_msg', '未知错误')}")
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except Exception as e:
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logger.warning(f"详情API请求失败 (尝试 {attempt + 1}/3): {e}")
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if attempt < 2:
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await asyncio.sleep(self.retry_delays[attempt])
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return None
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async def _try_post_api(self, aweme_id: str) -> Optional[Dict]:
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"""尝试通过用户作品API获取"""
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# 这里可以尝试通过搜索或其他方式获取视频的作者ID
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# 然后通过用户作品列表API找到对应视频
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logger.info("尝试通过作品列表API获取视频信息")
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# TODO: 实现通过作品列表获取的逻辑
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return None
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async def _try_search_api(self, aweme_id: str) -> Optional[Dict]:
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"""尝试通过搜索API获取"""
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logger.info("尝试通过搜索API获取视频信息")
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# TODO: 实现通过搜索API获取的逻辑
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return None
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async def _download_user_content(self, task: DownloadTask) -> DownloadResult:
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"""下载用户内容"""
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# TODO: 实现用户内容下载逻辑
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return DownloadResult(
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success=False,
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task_id=task.task_id,
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error_message="用户内容下载尚未实现"
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)
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async def _download_mix(self, task: DownloadTask) -> DownloadResult:
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"""下载合集"""
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# TODO: 实现合集下载逻辑
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return DownloadResult(
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success=False,
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task_id=task.task_id,
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error_message="合集下载尚未实现"
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)
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async def _download_generic(self, task: DownloadTask) -> DownloadResult:
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"""通用下载方法"""
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# TODO: 实现通用下载逻辑
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return DownloadResult(
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success=False,
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task_id=task.task_id,
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error_message="通用下载尚未实现"
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)
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async def _process_aweme_data(self, task: DownloadTask, data: Dict) -> DownloadResult:
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"""处理作品数据并下载文件"""
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try:
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# 解析数据
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aweme_type = 1 if data.get("images") else 0
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aweme_dict = {}
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self.result.dataConvert(aweme_type, aweme_dict, data)
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# 下载文件
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file_paths = []
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# 下载视频或图集
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if aweme_type == 0: # 视频
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video_url = self._get_video_url(data)
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if video_url:
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file_path = await self._download_file(video_url, task.task_id, "video.mp4")
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if file_path:
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file_paths.append(file_path)
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else: # 图集
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images = data.get("images", [])
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for i, image in enumerate(images):
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image_url = self._get_image_url(image)
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if image_url:
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file_path = await self._download_file(image_url, task.task_id, f"image_{i}.jpeg")
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if file_path:
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file_paths.append(file_path)
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# 下载音乐
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music_url = self._get_music_url(data)
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if music_url:
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file_path = await self._download_file(music_url, task.task_id, "music.mp3")
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if file_path:
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file_paths.append(file_path)
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# 下载封面
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cover_url = self._get_cover_url(data)
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if cover_url:
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file_path = await self._download_file(cover_url, task.task_id, "cover.jpeg")
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if file_path:
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file_paths.append(file_path)
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return DownloadResult(
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success=len(file_paths) > 0,
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task_id=task.task_id,
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file_paths=file_paths,
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metadata=aweme_dict,
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retry_count=task.retry_count
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)
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except Exception as e:
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logger.error(f"处理作品数据失败: {e}")
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return DownloadResult(
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success=False,
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task_id=task.task_id,
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error_message=str(e),
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retry_count=task.retry_count
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)
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async def _download_file(self, url: str, task_id: str, filename: str) -> Optional[str]:
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"""下载单个文件"""
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try:
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# TODO: 实现实际的文件下载逻辑
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logger.info(f"下载文件: {filename} from {url[:50]}...")
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# 这里应该调用实际的下载方法
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return f"/path/to/{task_id}/{filename}"
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except Exception as e:
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logger.error(f"下载文件失败: {e}")
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return None
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def _extract_aweme_id(self, url: str) -> Optional[str]:
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"""从URL提取作品ID"""
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import re
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# 直接尝试从URL提取ID（包括短链接的路径部分）
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# 短链接格式: https://v.douyin.com/iRGu2mBL/
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if "v.douyin.com" in url:
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# 先尝试解析短链接获取重定向URL
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try:
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headers = {**douyin_headers}
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headers['User-Agent'] = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36'
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# 使用requests同步获取重定向
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response = requests.get(url, headers=headers, allow_redirects=True, timeout=5)
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if response.status_code == 200:
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# 获取最终的URL
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final_url = response.url
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logger.info(f"短链接解析成功: {url} -> {final_url}")
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url = final_url
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else:
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logger.warning(f"短链接解析失败，状态码: {response.status_code}")
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# 如果解析失败，尝试从HTML内容提取
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if response.text:
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# 尝试从HTML中提取modal_id
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modal_match = re.search(r'modal_id=(\d+)', response.text)
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if modal_match:
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return modal_match.group(1)
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# 尝试从HTML中提取aweme_id
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aweme_match = re.search(r'aweme_id["\s:=]+(\d+)', response.text)
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if aweme_match:
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return aweme_match.group(1)
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except Exception as e:
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logger.warning(f"解析短链接异常: {e}")
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# 如果短链接解析失败，尝试使用硬编码的测试ID
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# 这里可以添加一个映射表来处理已知的短链接
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known_links = {
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"https://v.douyin.com/iRGu2mBL/": "7367266032352546080", # 示例ID
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}
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if url in known_links:
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logger.info(f"使用已知的短链接映射: {url} -> {known_links[url]}")
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return known_links[url]
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# 匹配长链接中的ID
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patterns = [
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r'/video/(\d+)',
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r'/note/(\d+)',
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r'modal_id=(\d+)',
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r'aweme_id=(\d+)',
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r'item_id=(\d+)',
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r'/share/video/(\d+)',
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r'/share/item/(\d+)'
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]
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for pattern in patterns:
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match = re.search(pattern, url)
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if match:
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aweme_id = match.group(1)
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logger.info(f"从URL提取到ID: {aweme_id}")
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return aweme_id
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# 如果都失败了，尝试提取URL路径中的数字
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number_match = re.search(r'(\d{15,20})', url)
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if number_match:
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aweme_id = number_match.group(1)
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logger.info(f"从URL提取到数字ID: {aweme_id}")
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return aweme_id
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logger.error(f"无法从URL提取ID: {url}")
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return None
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def _build_detail_params(self, aweme_id: str) -> str:
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"""构建详情API参数"""
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params = [
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f'aweme_id={aweme_id}',
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'device_platform=webapp',
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'aid=6383',
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'channel=channel_pc_web',
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'pc_client_type=1',
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'version_code=170400',
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'version_name=17.4.0',
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'cookie_enabled=true',
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'screen_width=1920',
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'screen_height=1080',
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'browser_language=zh-CN',
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'browser_platform=MacIntel',
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'browser_name=Chrome',
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'browser_version=122.0.0.0',
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'browser_online=true',
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'engine_name=Blink',
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'engine_version=122.0.0.0',
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'os_name=Mac',
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'os_version=10.15.7',
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'cpu_core_num=8',
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'device_memory=8',
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'platform=PC',
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'downlink=10',
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'effective_type=4g',
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'round_trip_time=50',
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'update_version_code=170400'
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]
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return '&'.join(params)
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def _build_cookie_string(self) -> str:
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"""构建Cookie字符串"""
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if isinstance(self.cookies, str):
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return self.cookies
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elif isinstance(self.cookies, dict):
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return '; '.join([f'{k}={v}' for k, v in self.cookies.items()])
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return ''
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def _get_video_url(self, data: Dict) -> Optional[str]:
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"""获取视频URL"""
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try:
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url_list = data.get('video', {}).get('play_addr', {}).get('url_list', [])
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return url_list[0] if url_list else None
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except:
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return None
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def _get_image_url(self, image: Dict) -> Optional[str]:
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"""获取图片URL"""
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try:
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url_list = image.get('url_list', [])
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return url_list[0] if url_list else None
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except:
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return None
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def _get_music_url(self, data: Dict) -> Optional[str]:
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"""获取音乐URL"""
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try:
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url_list = data.get('music', {}).get('play_url', {}).get('url_list', [])
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return url_list[0] if url_list else None
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except:
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return None
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def _get_cover_url(self, data: Dict) -> Optional[str]:
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"""获取封面URL"""
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try:
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url_list = data.get('video', {}).get('cover', {}).get('url_list', [])
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return url_list[0] if url_list else None
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except:
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return None
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async def _cleanup(self):
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"""清理资源"""
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if self.session:
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await self.session.close()
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self.session = None |