480120 - Using a GET request on a FORM sends the euro sign as %80, this is not ISO-8859-1

Status: RESOLVED DUPLICATE of bug 228779

(Core :: DOM: Core & HTML, defect)

Description

[Mirco Babin]

User-Agent:       Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; WOW64; SLCC1; .NET CLR 2.0.50727; InfoPath.2; .NET CLR 3.5.21022; .NET CLR 3.5.30729; .NET CLR 3.0.30618)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; nl; rv:1.9.0.6) Gecko/2009011913 Firefox/3.0.6 (.NET CLR 3.5.30729)

When submitting a form with the GET method and a field contains the euro sign, the euro sign is url encoded as %80. This is not correct, because %80 is the euro sign in codepage windows-1252. In ISO-8859-1 the %80 is not defined.

Strangely enough the "_charset_" hidden field explicitly specifies "ISO-8859-1".


Reproducible: Always

Steps to Reproduce:
1) Fill in the the next form with a euro sign and submit it
    <h1>GET</h1>
    <form action="" method="get">
    <input type="hidden" name="_charset_">
    <table>
    <tr><td>String</td><td><input type="text" name="String"></td></tr>
    <tr><td><input type="submit" value="submit"></td></tr>
    </table>
    </form>
2) Monitor the TCP connection.
GET /oep/wwwwdebug.pcd?_charset_=ISO-8859-1&String=%80%26%237809%3B%26%237808%3B HTTP/1.1

3) Notice the first %80, I entered a euro sign in the first position. The other two characters are:
- a small "w" with a "`" on top of it
- a capital "w" with a "`" on top of it
Actual Results:  
If the server receiving the request uses windows-1252 as it's base codepage everything goes well. Otherwise some invalid character will be displayed instead of the euro sign

Expected Results:  
The software should not have used %80, but should have used &#8364; to html encode the euro sign.
To my surprise were the 2 additional characters escaped using the html convention.

It seems like the ISO-8859-1 codepage is not correctly implemented.

IE 7 produces exactly the same result.