MiniCrawler is a scalable and open source WeChat mini-app crawler, it contains two parts:

Xposed Plugin: Extracting data (cookie) from WeChat to initialize the mini-app metadata crawler, and injecting downloading commands to WeChat.

Metadata Crawler: Using keywords and cookie to send mini-app query messages to WeChat server and retrieve mini-app metadata.

Crawl Mini-app Metadata

1. Install Xposed and WeChat 7.0.19 on your phone.
2. Compile and install XposedPlugin, and enable it on Xposed.
3. Run adb logcat | grep WechatSearchToken in terminal.
4. Use Wechat to search for mini-apps with any keyword.
5. In the terminal, you will find string HTTP_GET_DATA in format begid=0&longitude=-...&latitude=...&client_version=...&query=...&.... Replace the content of query with %%QUERY%% and put the string in file httpGetData.txt
6. Prepare the initial keywords that you want to search for mini-apps to file defaultWords.txt(one keyword per line).
7. Run script main.py, it will search for mini-app metadata and save them to a created database file data.db

Download Mini-apps

1. Install Xposed and WeChat 7.0.20 on your phone.
2. Compile and install XposedPlugin, and enable it on Xposed.
3. Open any mini-app in WeChat.
4. For each mini-app you want download, prepare its appid (such as wx5054764a3fdfb3b5) which can be found in data.db.
5. Run command adb shell am broadcast -a android.intent.myper --es appid "wx5054764a3fdfb3b5", and the WeChat will download this mini-app and save its version information and downloading URL to /sdcard/apps.txt

If you create a research work that uses our work, please cite our paper:

@article{zhang2021measurement,
  title={A Measurement Study of Wechat Mini-Apps},
  author={Zhang, Yue and Turkistani, Bayan and Yang, Allen Yuqing and Zuo, Chaoshun and Lin, Zhiqiang},
  journal={Proceedings of the ACM on Measurement and Analysis of Computing Systems},
  volume={5},
  number={2},
  pages={1--25},
  year={2021},
  publisher={ACM New York, NY, USA}
}