webview-bundle

Webview Bundle Format (.wvb)

Header

• Magic Number (8 bytes)
  • Big endian format. Value : 0xf09f8c90 / 0xf09f8e81
  • Represents "🌐🎁" as utf8 encoding.
• Version (1 bytes)
  • Version field for this webview bundle format.
  • Available versions:
    • version1: 0x01
• File Descriptors Size (4 bytes)
  • 4 bytes unsigned big endian value (u32)
  • Indicates the size of the File Descriptors field to be read next.
• File Descriptors
  • This field has dynamic bytes size which is determined by the value of the File Descriptors Size field, and value is big endian format.
  • Format of file descriptors should be HashMap formatted:
    • Key is a path for this file.
    • Value contains offset and length.
• Header checksum (4 bytes)
  • Header checksum verifies that the full header data has been decoded correctly.
  • The checksum is the result of xxHash-32 algorithm digesting the original (decoded) data as input.

Data

• Data
  • This field has dynamic bytes size which can be determined each file offset and length from File Descriptors.
  • The content of data is compressed with lz4 block format.

Footer

• Content Checksum (4 bytes)
  • Content checksum verifies that the full data content has been decoded correctly.
  • The checksum is the result of xxHash-32 algorithm digesting the original (decoded) data as input.