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(emacs-mime)rfc2231

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rfc2231
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   RFC2231 defines a syntax for the `Content-Type' and
`Content-Disposition' headers.  Its snappy name is "MIME Parameter
Value and Encoded Word Extensions: Character Sets, Languages, and
Continuations".

   In short, these headers look something like this:

     Content-Type: application/x-stuff;
      title*0*=us-ascii'en'This%20is%20even%20more%20;
      title*1*=%2A%2A%2Afun%2A%2A%2A%20;
      title*2="isn't it!"

   They usually aren't this bad, though.

   The following functions are defined by this library:

 - Function: rfc2231-parse-string string
     Parse a `Content-Type' header STRING and return a list describing
     its elements.

          (rfc2231-parse-string
           "application/x-stuff;
           title*0*=us-ascii'en'This%20is%20even%20more%20;
           title*1*=%2A%2A%2Afun%2A%2A%2A%20;
           title*2=\"isn't it!\"")
          => ("application/x-stuff"
              (title . "This is even more ***fun*** isn't it!"))

 - Function: rfc2231-get-value ct attribute
     Takes a list CT of the format above and returns the value of the
     specified ATTRIBUTE.

 - Function: rfc2231-encode-string parameter value
     Encode the string `PARAMETER=VALUE' for inclusion in headers likes
     `Content-Type' and `Content-Disposition'.