Do you need HTML::Entities maybe? This likely has little to do with HTTP::Request::Common, as that is only used for the transfer but not really for the encoding.

I have checked URI::Escape , but i believe the HTTP::Request::Common is an easy way as per its documentation as it escapes automatically.
Help Sought
Thansk
abhi

Please show us data in the form you have it, and in the form you want it, and how it is used. That will help us help you better, because currently, it is quite unclear to me what data you have, where you use it and where you think that HTTP::Request::Common will escape or unescape it.

":" in a value must be escaped. You're asking us to help you generate invalid urls. What's the real problem?

Update: Or maybe not. It's conditional:

If data for a URI component would conflict with a reserved character's purpose as a delimiter, then the conflicting data must be percent-encoded before the URI is formed.

It's still valid to escape it, though, and most clients will. You can't even trust proxies to preserve it.

Hi,
Ok let me give you an example for the string:
The original string is:


http://api.url?data=<?xml
version="1.0" encoding="ISO-8859-1"?><!DOCTYPE MESSAGE SYSTEM "http://
+127.0.0.1/psms/dtd/message.dtd" ><MESSAGE><USER USERNAME="test" PASSW
+ORD="XXXXXX"/><SMS UDH="0" CODING="1" TEXT="The flight # <101> "DEL" 
+to "BLR" is delayed and it's revised time will be informed later. Hav
+e a nice day!" PROPERTY="0" ID="1"><ADDRESS FROM="ValueFirst" TO="91X
+XXXXXXXXX" SEQ="1" TAG="some clientside random data" /></SMS></MESSAG
+E>&action=send
[download]


The escaped string is:


http://api.url/psms/servlet/psms.Eservice2?data=%3C?xml%20version=%221
+.0%22%20encoding=%22ISO-8859-1%22?%3E%3C!DOCTYPE%20MESSAGE%20SYSTEM%2
+0%22http://127.0.0.1/psms/dtd/message.dtd%22%20%3E%3CMESSAGE%3E%3CUSE
+R%20USERNAME=%22test%22%20PASSWORD=%22valueone%22/%3E%3CSMS%20%20UDH=
+%220%22%20CODING=%221%22%20TEXT=%22The%20flight%20No.%20SG101:%20DEL%
+20to%20BLR%20is%20delayed%20and%20it's%20revised%20time%20will%20be%2
+0informed%20later.%20Have%20a%20nice%20day!%22%20PROPERTY=%220%22%20I
+D=%221%22%3E%3CADDRESS%20FROM=%22ValueFirst%22%20TO=%22919891153528%2
+2%20SEQ=%221%22%20TAG=%22some%20clientside%20random%20data%22%20/%3E%
+3C/SMS%3E%3C/MESSAGE%3E&action=send
[download]


Pl. let me know how to generate the escaped string:
Please help me as this is getting crucial for me
Thanks
abhi

That's very long for a URL. Most serves have a limit on the length of the URLs they can handle.

Also, your XML is invalid. You have unescaped double quotes in a double quoted attributes value, and "<" is not allowed to appear in attribute values. You need to use "&quot;" and "&lt;". Parsers might excuse the latter, but the former will definitely result in an error.

TEXT="The flight # <101> "DEL" to "BLR" is ..."
[download]

should be

TEXT="The flight # <101> "DEL" to "BLR" is ..."
[download]

But to answer your question, you can use URI to build a URL (a kind of URI).

use URI qw( );

chomp( my $data = <<'__EOI__' );
<?xml version="1.0" encoding="ISO-8859-1"?><!DOCTYPE MESSAGE SYSTEM "h
+ttp://127.0.0.1/psms/dtd/message.dtd" ><MESSAGE><USER USERNAME="test"
+ PASSWORD="XXXXXX"/><SMS UDH="0" CODING="1" TEXT="The flight # <101> 
+"DEL" to "BLR" is delayed and it's revised time will be informed late
+r. Have a nice day!" PROPERTY="0" ID="1"><ADDRESS FROM="ValueFirst" T
+O="91XXXXXXXXXX" SEQ="1" TAG="some clientside random data" /></SMS></
+MESSAGE>
__EOI__

my $url = URI->new('http://api.url/psms/servlet/psms.Eservice2');
$url->query_form(
    data   => $data,
    action => 'send',
);

print "$url\n";
[download]

#!/usr/bin/perl --

use strict;
use warnings;

use HTTP::Request::Common;

use URI;

{
    my $uri = URI->new('http://localhost/');

    print POST( $uri, ['data' => '<data>'])->as_string;
    
    $uri->query_form('data' => '<data>');
    print GET( $uri )->as_string;

}
__END__
POST http://localhost/
Content-Length: 15
Content-Type: application/x-www-form-urlencoded

data=%3Cdata%3E
GET http://localhost/?data=%3Cdata%3E
[download]