问题
This is an example raw email I am trying to parse:
MIME-version: 1.0
Content-type: text/html; charset=UTF-8
Content-transfer-encoding: quoted-printable
X-Mailer: Verizon Webmail
X-Originating-IP: [x.x.x.x]
=C2=A0test testing testing 123
What is =C2=A0? I have tried a half dozen quoted-printable parsers, but none handle this correctly. How would one properly parse this in C#?
Honestly, for now, I'm coding:
//TODO WTF
encoded = encoded.Replace("=C2=A0", "");
Because I can't figure out why that text is there randomly within the MIME content, and isn't supposed to be rendered into anything. By just removing it, I'm getting the desired effect - but WHY?!
To be clear, I know that (=[0-9A-F]{2}) is an encoded character. But in this case, it seemingly represents NOTHING.
回答1:
"=C2=A0" represents the bytes C2 A0. However, since this is UTF-8, it translates to 00A0, which is the Unicode for non-breaking space.
See UTF-8 (Wikipedia).
回答2:
%C2%A0 This is the code of a hidden folder, create a hidden folder and save in it, for example, a text file, then open this file through a browser and you will see these characters in the search bar. As I understand it, these characters are optional and do not translate to other code.
来源：https://stackoverflow.com/questions/2774471/what-is-c2-a0-in-mime-encoded-quoted-printable-text