Bilibili sent a legal letter to the BiliRoaming open-source project, demanding it stop reverse engineering its non-public APIs, authentication, and paid content protection mechanisms, and delete or revert related code within 2 days. This rare legal action against a reverse-engineering project highlights the escalating tension between platform protection and open-source modifications; it could set a precedent affecting developers and users who rely on such tools. The letter specifically cites actions like hooking playback authentication, rewriting paid bangumi to be viewable, bypassing secure transmission locks, and modifying CDN origin fallback; BiliRoaming is an Xposed module that unblocks Bilibili's regional restrictions for anime shows.
Background
BiliRoaming is an open-source Xposed module for Android that allows users to bypass Bilibili's regional restrictions on anime content and enables other minor features. Xposed is a framework that lets users modify the behavior of apps on rooted Android devices without altering APK files. Reverse engineering like this often violates a platform's terms of service and may be subject to legal challenges under copyright or anti-circumvention laws.