[whatwg] [WF2] action="mailto:" - encoding spaces

Michael A. Puls II shadow2531 at gmail.com
Wed Oct 29 00:35:31 PDT 2008

On Tue, 28 Oct 2008 16:01:33 -0400, Ian Hickson <ian at hixie.ch> wrote:

> On Tue, 30 Jan 2007, Shadow2531 wrote:
>> <http://www.whatwg.org/specs/web-forms/current-work/#for-mailto>
>> <http://www.whatwg.org/specs/web-forms/current-work/#x-www-form-urlencoded>
>> (#4)
>> In mailto URIs, %20 represents a space.
>> <form action="mailto:">
>>    <input name="subject" value="1 2">
>>    <input type="submit">
>> </form>
>> If you submit that form, "mailto:?subject=1+2" will be passed to the
>> mail client instead of "mailto:?subject=1%202". This results in "1+2"
>> in the subject field instead of "1 2".
>> Are UAs allowed to use %20 instead so things come out right, or must
>> mail clients decode + to a space? Thunderbird, M2, and Outlook express
>> don't decode +s.
>> RFC2368 is referenced, but it and application/x-www-form-urlencoded
>> that the mailto: form methods are referenced under conflict with each
>> other on whether a space should be encoded to %20 or +.
> Fixed in the HTML5 spec. Thanks.

Awesome! Thanks.

Question though.

What about the method="POST" case where the query string is kept?

For example:

<form action="mailto:?subject=1+2" method="POST">
     <input type="text" name="body" value="1+2">
     <input type="text" name="other" value="1 2">
     <input type="submit">

When submitting that, I expect to see:


submitted to the mail client.

The current POST section seems to say that this would be submitted instead:


In other words, I think spaces in values should be emitted as %20 for POST  
too and in the case there's a query string present in the action attribute  
for POST, any + in the hvalues of the query string should be normalized to  
%2B (to be consistent with a + inside a form control's value that gets  
converted to %2B)

Also, for POST only, if there isn't a subject hvalue specified in the  
action attribute, Firefox will append subject=Form%20Post%20from%20Firefox  
so that "Form Post from Firefox" ends up in the mail client's subject  
field. Do you think "Form Post from UA" should be specified?


More information about the whatwg mailing list