Imap消息编码问题
从imap服务器获取的一些邮件内容看起来像=C3=B6=C3=BC=C3=B6=C3=BC=C3=B6=C3=BC=这是什么编码？邮件标头编码是 UTF-8，但使用 UTF-8 解码时我得到了乱码消息。
非常感谢任何帮助。
Some of the mails contents fetched from imap server looks like =C3=B6=C3=BC=C3=B6=C3=BC=C3=B6=C3=BC= what kind of encoding is this? Mail header encoding is UTF-8 but decoding with UTF-8 i got scrambled msg.
Any help is much appreciated.
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Quoted-Printable
它用于通过 7 位介质传输 8 位数据。
字符从 8 位字符转换为三个 7 位字符，格式为
=XX，其中XX是 8 位字符的十六进制字符代码，=字符将变为=3D。一行的长度限制为 76 个字符，添加软换行符以符合此规则，这是通过以
=结尾来指示该行应该继续来完成的。https://www.rfc-editor.org/rfc/rfc2045
http://en.wikipedia.org/wiki/Quoted-printable
在线解码器
Quoted-Printable
It is used to transmit 8-bit data over a 7-bit medium.
Characters are converted from 8-bit to three 7-bit characters in the form
=XXwhereXXis the hexadecimal character code for the 8-bit character, the=character will become=3D.The length of a line is restricted to 76 characters, soft line breaks are added to comply with this rule, this is done by ending with a
=to indicate that the line should continue.https://www.rfc-editor.org/rfc/rfc2045
http://en.wikipedia.org/wiki/Quoted-printable
Online Decoder