There must be something more to this, because there is no reason why the user agent should encode differently depending on the server to which the request is sent. At the time the request is sent, the browser does not even know what kind of server it is sending the request to, and reverse proxies are completely transparent to the browser. It is only when it receives the response that it knows what kind of server handled it (Server header), and that would be IIS anyway (unless the response was served by an Apache cache). Content negociation is end-to-end - not hop-by-hop.
Cdt
-ascs
________________________________
From: Computa Computa [mailto:cc_apache_org@xxxxxxxx]
Sent: Tuesday, May 23, 2006 12:36 PM
To: users@xxxxxxxxxxxxxxxx
Subject: [users@httpd] POST encoding
Hi
I use Apache httpd and mod_rewrite as a reverse proxy between an IIS and end-users. When filling forms, strings sent from the browser to the proxy via a POST transaction are not encoded the same way compared to the strings sent directly from the browser to IIS. Here is an example bellow. As one can see, the string "téléphone" is encoded "t%E9l%E9phone" when sent to IIS and "t%C3%A9l%C3%A9phone" when sent to the Apache proxy. To my knowlegde, %E9 is a normal UTF-8 encoding for é, but I don't understand the encoding used by Apache nor does it works well with the Web application (it displays strange symbols). I thought it might be a content negociation problem and I set the parameters "DefaultLanguage fr" and "AddDefaultCharset Off". I also have all the AddLanguage and AddCharset. Anyone has an idea of what could be wrong ?
Thanks a lot,
Matthieu
----- From Browser to IIS -----
Hypertext Transfer Protocol
POST /save.asp HTTP/1.1\r\n
Request Method: POST
Request URI: /save.asp
Request Version: HTTP/1.1
Host: MyIisHostname\r\n
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; fr; rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3\r\n
Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5\r\n
Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3\r\n
Accept-Encoding: gzip,deflate\r\n
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n
Keep-Alive: 300\r\n
Connection: keep-alive\r\n
Referer: http://MyIisHostname/edit.asp\r\n <http://MyIisHostname/edit.asp%5Cr%5Cn>
Cookie: ASPSESSIONIDSQDCDQTD=OFEFAOMAEJGINAJBFPAHDGOD\r\n
Content-Type: application/x-www-form-urlencoded\r\n
Content-Length: 41\r\n
\r\n
Line-based text data: application/x-www-form-urlencoded
MyVar=t%E9l%E9phone
----- From Browser to Apache reverse proxy -----
Hypertext Transfer Protocol
POST /save.asp HTTP/1.1\r\n
Request Method: POST
Request URI: /save.asp
Request Version: HTTP/1.1
Host: 10.xx.yy.iis\r\n
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; fr; rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3\r\n
Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5\r\n
Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3\r\n
Accept-Encoding: gzip,deflate\r\n
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n
Referer: http://10.xx.yy.proxy/edit.asp\r\n <http://10.xx.yy.proxy/edit.asp%5Cr%5Cn>
Cookie: ASPSESSIONIDSQDCDQTD=NFEFAOMACGFIOFAAMIDEJLNH\r\n
Content-Type: application/x-www-form-urlencoded\r\n
Max-Forwards: 10\r\n
X-Forwarded-For: 10.xx.yy.browser\r\n
X-Forwarded-Host: 10.xx.yy.proxy\r\n
X-Forwarded-Server: ProxyHostname\r\n
Content-Length: 53\r\n
\r\n
Line-based text data: application/x-www-form-urlencoded
MyVar=t%C3%A9l%C3%A9phone
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