HttpUtility.UrlEncode will not encode ! as %21

Question

HttpUtility.UrlEncode("!!!test", Encoding.GetEncoding("windows-1251"))

It doesn't encode ! to %21 - why?

As a workaround you can do a `.Replace("!","%21")` – CodesInChaos Mar 07 '11 at 14:00 — CodesInChaos, Mar 07 '11 at 14:00

score 11 · Accepted Answer · edited May 23 '17 at 12:09

11

Because it is a valid character on a URL and doesn't need to be encoded.

edited May 23 '17 at 12:09

Community

answered Mar 07 '11 at 13:49

Oded

1

but if i sniff a firefox, it encodes, also php function urlencode encodes too – kusanagi Mar 07 '11 at 13:51
@kusanagi - which means they are doing something that is not needed, at least when URL encoding is concerned. They may be doing that due to internal implementation considerations. – Oded Mar 07 '11 at 13:51
1

but server not accept '!' only '%21' so i need manually replace? – kusanagi Mar 07 '11 at 13:53
@kusanagi - What server? You didn't mention a server in your question. – Oded Mar 07 '11 at 13:54
1

http server, i make program post, so if i submit in firefox server accept '!' but my programm post request not accept – kusanagi Mar 07 '11 at 13:55
@kusanagi - What webserver? Did you attach a debugging proxy to see the actual request/response? Perhaps you should be asking a new question about this. – Oded Mar 07 '11 at 13:58
if i post value '!!!test' server get only 'test' but if i post'%21%21%21test' server get '!!!test' – kusanagi Mar 07 '11 at 14:00
2

@kusanagi - Looks like an issue with your web server or framework. It works fine on wikipedia: http://en.wikipedia.org/wiki/Yahoo! – Oded Mar 07 '11 at 14:04

1 Answers1