| URLCompression.framework | |
|---|---|
| Private Framework | |
| Availabile | 14.0 – present |
The URLCompression library is used to encode and decode URLs as a part of encoding and decoding app clip codes in AppClip.framework.
The properties of the URLCompression framework can be inferred from Apple's documentation of which URLs make for good App Clip URLs.
These codes (and the associated URLCompression library) are also used in the Apple Pay for Web framework, demonstrated at applepaydemo.apple.com.
The URLCompression framework can be most easily decompiled using the App Clip code generator developer tool published by Apple.[clarification needed] This seems to show a library written in C++ using Huffman coding for encoding an arbitrary URL into a byte string. These byte strings are then processed with Reed–Solomon error correction before being encoded into the recognizable App Clip code image.