字母数字模式 vs 字节编码模式
Alphanumeric mode (5.5 bits/char) is limited to uppercase, digits, and 9 symbols. Byte mode (8 bits/char) supports the full ISO 8859-1 character set including lowercase. Most URLs use byte mode due to lowercase characters.
Alphanumeric mode (5.5 bits/char) is limited to uppercase, digits, and 9 symbols. Byte mode (8 bits/char) supports the full ISO 8859-1 character set including lowercase. Most URLs use byte mode due to lowercase characters.