Re: gnus-url-mailto broken on foo+bar@somewhere.invalid

[Frank Schmitt <usereplyto@Frank-Schmitt.net>]

Reiner Steib <4.uce.03.r.s@nurfuerspam.de> writes:

> mailto links like `mailto:foo+bar@somewhere.invalid' aren't handled
> correctly by `gnus-url-mailto'.  `gnus-url-mailto' calls
> `gnus-url-unhex-string' and the first line in this function translates
> "+" to " ":

There's an other case where gnus-url-mailto fails: It doesn't decode
encoded "html-characters" and 8bit characters encoded with the
&...;-sgml-syntax like in
"mailto:Paul%20Kr&auml;mer%20&lt;foo@schlurps.de&gt;"

On Emacs 21 this is quite easy to fix: There's 

(defun iso-sgml2iso (from to &optional buffer)
 "Translate SGML entities in the region to ISO 8859-1 characters.
The entities used are from \"ISO 8879:1986//ENTITIES Added Latin 1//EN\".
Optional arg BUFFER is ignored (for use in `format-alist')."

Happily waiting for us. However this does only convert sgml-Umlauts to
iso-chararacters, it doesn't handle the html special-characters, we'd
have to either change the function before using it, or handle

 < <=> &lt;
 > <=> &gt;
 & <=> &amp;
 " <=> &quot;

specially.

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