mitmproxy捕获Tunefind的m4a预览音频时连接中断求助

我尝试从Tunefind下载m4a格式的预览音频文件，已在Windows上配置localhost:8080代理，安装mitmproxy及对应的.cer证书。但当代理捕获音频文件时，网络连接会被阻断，需关闭代理才能恢复。同时想知道有没有办法通过脚本自动下载这些预览文件——目前必须手动点击播放按钮才能在浏览器网络面板里看到对应URL。

捕获日志 #

[::1]:56371: POST http://149.154.167.255/api
          << 200 OK 88b
[::1]:56371: POST http://149.154.167.255/api
          << 200 OK 88b
[::1]:56308: GET https://api-v2.tunefind.com/forward?action=p0BNXDJVzXlSljXRu6G7CScvPiHm%252FLEFVIhMahaF%252FBui… HTTP/2.0
 << HTTP/2.0 302 Found 0b
[05:41:54.777][[::1]:56390] client connect
[::1]:56371: POST http://149.154.167.255/api
          << 200 OK 88b
[::1]:56371: POST http://149.154.167.255/api
          << 200 OK 88b
[05:41:58.031][[::1]:56390] server connect audio-ssl.itunes.apple.com:443 (23.12.105.227:443)
[::1]:56371: POST http://149.154.167.255/api
          << 200 OK 88b
[05:41:58.200] Intercettato file audio: https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview125/v4/97/c9/b7/97c9b734-f2a7-c05d-88c9-6799dc358553/mzaf_1452710730924593330.plus.aac.p.m4a

运行代理的命令 #

mitmdump -s tunefind_proxy.py --listen-port 8080 --set console_eventlog_verbosity=debug

当前脚本内容 #

from mitmproxy import http
import os
import requests
import logging

logging.basicConfig(level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s')

save_dir = "C:\\Users\\Administrator\\Desktop\\scripts\\tunefind\\downloads"
os.makedirs(save_dir, exist_ok=True)

def request(flow: http.HTTPFlow) -> None:
    if flow.request.method == "GET":
        url = flow.request.pretty_url
        if "audio-ssl.itunes.apple.com" in url and url.endswith(".m4a"):
            logging.info(f"Intercettato file audio: {url}")
            download_audio(url)

def download_audio(url):
    try:
        logging.debug(f"Tentativo di download del file: {url}")
        response = requests.get(url, stream=True, verify=False)
        response.raise_for_status()

        file_name = os.path.basename(url)
        logging.debug(f"Nome del file estratto: {file_name}")

        save_path = os.path.join(save_dir, file_name)
        logging.debug(f"Percorso completo del file: {save_path}")

        with open(save_path, 'wb') as file:
            for chunk in response.iter_content(chunk_size=8192):
                file.write(chunk)
        logging.info(f"File salvato: {save_path}")
    except requests.exceptions.RequestException as e:
        logging.error(f"Errore durante il download del file: {e}")

1. 修复代理阻断问题 #

当前脚本的核心问题是：在request阶段单独发起新的requests.get请求，却未处理原请求的响应，导致浏览器一直等待代理返回内容，最终超时阻断连接。

修改思路：在response阶段直接保存代理已获取到的音频内容，既不阻断原连接，还能避免重复请求浪费带宽。

修改后的脚本：

from mitmproxy import http
import os
import logging

logging.basicConfig(level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s')

save_dir = "C:\\Users\\Administrator\\Desktop\\scripts\\tunefind\\downloads"
os.makedirs(save_dir, exist_ok=True)

def response(flow: http.HTTPFlow) -> None:
    if flow.request.method == "GET":
        url = flow.request.pretty_url
        if "audio-ssl.itunes.apple.com" in url and url.endswith(".m4a"):
            logging.info(f"捕获到音频文件: {url}")
            # 直接从代理响应中保存内容，无需重复请求
            file_name = os.path.basename(url)
            save_path = os.path.join(save_dir, file_name)
            
            try:
                with open(save_path, 'wb') as file:
                    file.write(flow.response.content)
                logging.info(f"文件已保存: {save_path}")
            except Exception as e:
                logging.error(f"保存文件出错: {e}")

2. 自动触发音频预览（无需手动点击播放） #

Tunefind的音频预览URL需点击播放后才会加载，自动获取可通过以下两种方式实现：

方式一：自动化工具模拟点击 #

用Selenium或Playwright打开目标页面，自动遍历并点击所有播放按钮，触发音频请求后由mitmproxy自动捕获保存。

示例（Playwright实现）：

from playwright.sync_api import sync_playwright
import time

def auto_trigger_previews(url):
    with sync_playwright() as p:
        # 配置代理指向mitmproxy
        browser = p.chromium.launch(proxy={"server": "http://localhost:8080"}, headless=False)
        page = browser.new_page()
        page.goto(url)
        # 等待页面加载完成
        time.sleep(3)
        # 遍历所有播放按钮并点击
        play_buttons = page.query_selector_all('button[aria-label="Play"]')
        for btn in play_buttons:
            btn.click()
            # 等待音频请求完成
            time.sleep(1)
        browser.close()

# 替换为目标Tunefind页面URL
auto_trigger_previews("https://www.tunefind.com/show/your-target-show")

方式二：直接调用Tunefind API获取URL #

分析Tunefind的API请求逻辑，提取必要参数后直接构造请求获取所有音频预览链接，无需模拟点击。需注意API可能存在签名或认证机制，需从浏览器请求中提取action等关键参数。

注意事项 #

• 确保mitmproxy证书已正确添加到系统和浏览器的信任列表，避免HTTPS请求失败。
• 频繁请求可能触发反爬机制，建议添加适当延迟。
• 下载的预览音频仅可用于个人非商业用途，需遵守版权规定。

内容的提问来源于stack exchange，提问作者nathan never