Http_utl.text_write for http 'POST" does not work

Question

i have a proc that uses utl_http code I have seen all over on web sites for 'POST'ing to a REST web service ..... i use utl_http.write_text to write data to the request body but no data gets written ...... below are the code segments I use
url entered directly into browser that **works fine**: http://www.media.com/admintool/Services.aspx?par_string=[{ "PAR_Transaction_Id" : 5566338, "MRI_Title_Name" : "4 Wheel & Off Road"}]
calling routine:
declare
l_url varchar2 (300) := 'http://www.media.com/admintool/Services.aspx';
l_data clob;
l_query varchar2(32767);
begin
dbms_output.enable(3000000);
l_data := '[{
"PAR_Transaction_Id" : 5566338,
"MRI_Title_Name" : "4 Wheel & Off Road"}]
http_util_pkg.http_post(
p_url_in => l_url, p_data_in => l_data);
end;
called routine segment:
l_http_req := utl_http.begin_request (p_url_in, 'POST');
-- Set the HTTP request headers
utl_http.set_header(l_http_req, 'User-Agent', 'Mozilla/4.0');
utl_http.set_header(l_http_req, 'content-type', p_data_type);
utl_http.set_header(l_http_req, 'content-length', v_length);
-- Write the data to the body of the HTTP request
utl_http.write_text(l_http_req, 'par_string=');
while v_index <= v_length
loop
utl_http.write_text(l_http_req, substr(p_data_in, v_index, 4000));
dbms_output.put_line ('data = ' || substr(p_data_in, v_index, 4000));
v_index := v_index + 4000;
end loop;
results .... you can see below that the header content length is non-zero but the response header says there is no content, so something is haywire with the write_text method
url = http://www.media.com/admintool/Services.aspx
length in data = 1271
http package; url = http://www.media.com/admintool/Services.aspx
after set authentication
after write headers
data = [{
"PAR_Transaction_Id" : 5566338,
"MRI_Title_Name" : "4 Wheel & Off Road"}]
after write text
status code: 200
reason phrase: OK
Connection: close
Date: Tue, 06 Apr 2010 03:59:27 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 2.0.50727
Cache-Control: private
Content-Length: 0 *************** response header says no content !!!
can you help me figure out what is wrong with the utl_http.write_text method ???
thank you

Answer 1

Please do not resurrect old threads - rather ask your question in a new thread. If need be, add a URL in your new thread posting that refers to the old thread. Also add as much relevant details as possible. Your Oracle version (all 4 digits). Your o/s. If possible, sample code and data that can be used as a test case. Complete error details. And what the intent of the code is (i.e. what the actual problem is that you're trying to solve).
As for HTTP post - works just fine as far as I've used it.