How to use method POST to send XML using utl_http?

Hi,
I am trying to work out how to use the POST method to mimic submitting data from a HTML form, using utl_http.
I cannot use SOAP for this as the people I am sending the data to are just expecting an XML document to be sent to a standard CGI script running on their web server.
There is a lot of documentation on how to submit data using the POST method (using Utl_Http.Write_Text etc), but I cannot find anything that tells me how to submit form variables.
The examples on OTN say this:
"Alternatively use method => 'POST' and Utl_Http.Write_Text to
build an arbitrarily long message"
but don't tell me how to actually place the data into the required input parameters of the CGI program I am hitting.
I need to hit a URL such as
www.asite.com/cgiprogram
and pass in a parameter, eg
in_param="test+data"
I am currently doing this as a GET, which works, but the XML document I am passing in could potentially be bigger than the GET method will allow.
Any help would be greatly appreciated.
Thanks,
Leon.

Please try the PL/SQl forum

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How to send XML using UTL_HTTP

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Yikes - how embarassing ! Thanks for pointing out my beginners mistake there. I've fixed my code - and also implemented the substitutions of parameters like you suggested - I like that approach.
Unfortunately the end result is no better - the line
utl_http.read_text(resp,response_text);
Still returns nothing back
The headers that are coming back are
Date: Thu, 04 Jul 2013 08:31:56 GMT
Server: Apache/2.2.16 (Ubuntu)
X-Powered-By: PHP/5.3.3-1ubuntu9.3
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Vary: Accept-Encoding
Content-Length: 0
Content-Type: text/html; charset=UTF-8
Connection: close
I guess I will need to try chasing it with the fastsms vendor so see if they can check my incoming request and see if there are any glaring problems. I know the xml is correct as I am now logging the xml string just before I send it and when I take that string and put it in their test form it works perfectly - something else in the puzzle is missing. I've had no experience using utl_http before - perhaps it's no possible to read the xml repsonse using this ?
Anyway, thanks for your help Billy.
ps - How do you paste your code into your message to get that formatting ?
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