About Base64 encoding
- Why do you have Base64 code? Because some network transport channels do not support all bytes, such as traditional mail only supports the transmission of visible characters, such as ASCII code control characters can not be transmitted by mail. The use of this is greatly limited, and it is not possible to send all of the bytes of the binary stream as visible characters. The best way to do this is to do an extension to support the delivery of binary files without changing the traditional protocol. Under such demand, Base64 appeared, Base64 code came into being, Base64 is a representation of binary data based on 64 printable characters.
- Principle: See "The Principle of coding –base64 coding"
- Some notes:
- BASE64 encoding is mainly used in the transmission, storage, representation of the field of binary, but also can be used to encrypt, but this kind of encryption is relatively simple, just a glance does not know what content, of course, you can also Base64 character sequences to be customized to encrypt.
- BASE64 encoding is the process of binary to character, like some Chinese characters with different encoding to binary, the resulting binary is not the same, so the resulting Base64 character is not the same . For example, "Internet" corresponds to the utf-8 format of the BASE64 encoding is "5LIK572R", corresponding to GB2312 format Base64 encoding is "yc/n+a==".
- ★ Sometimes the transmission on the network in addition to the Base64 encoding after the URL encoding .
Coding-related Basic theory
