POST action

Posted on 2002-05-29
Last Modified: 2010-03-05
Instead of going to a website, type in with some info, and click on send button, is it possible for me to write a script such that it'll post the data the same way the webpage does it?

Right now, I have a cgi perl script that accepts input from a webpage.  It accepts 2 fields that will be used in the perl script.

Please advise.
Question by:YamSeng
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Expert Comment

ID: 7044450
Note that that doesn't always work.  I have code in my perl scripts that will not allow someone to include the parameters directly in the URL.

Accepted Solution

dda earned 50 total points
ID: 7046486
use HTML::Form;

my $form = HTML::Form->parse($html,$url);
my $req = $form->click;

etc., etc.

Hope this helps.
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Author Comment

ID: 7046537
ahoffmann, where should I put that line in?  a csh script?  or perl script? just that 1 line?

dda, I'll try that out.
From my understanding, you are trying to fill in the details for the form I should have online, and clicking the submit button. (correct me if I'm wrong).

Expert Comment

ID: 7046550
Yes, correct. You will need to use other modules as well:

use HTML::Form;
use LWP;

my $ua = LWP::UserAgent->new();

my $url = ''; #
my $login_req = HTTP::Request->new(GET => $url);
my $login_res = $ua->request($login_req);
my $html = $login_res->content;

my $form = HTML::Form->parse($html,$url);
my $req = $form->click;

my $res = $ua->request($req);
LVL 51

Expert Comment

ID: 7049734
> .. put that line in?  a csh script?  or perl script?
you said you still have a perl script, so that script would be the best place 'cause you still have variable names and values there too.
Use the example suggested by dda.
If you have wget you also might use:
  system("wget http://www.som.dom/path/to/your.cgi?name-of-field1=value-of-field1&name-of-field2=value-of-field2 ");

not as elegant as LWP, but quick&dirty ;-)

Expert Comment

ID: 7065426
As I read the question all the answerers so far are missing something.  Buy maybe it is me.  If you actually want your script, not another page, to do the post then this is what you need to do, and forget extra pages.

I have a sub that I use as follows:
sub doAPost {                   #post to _[0], the data in $_[1]

  # Create a user agent object
  use LWP::UserAgent;

  $hdrs=new HTTP::Headers(User_Agent => 'ResourceDataBrowser',

  $ua = LWP::UserAgent->new;

  # Create a request
  my $req = HTTP::Request->new(POST => $_[0],$hdrs);

  # Pass request to the user agent and get a response back
  my $res = $ua->request($req);

  # Check the outcome of the response
  if ($res->is_success) {
    return $res->content;
  else {
    return -1;


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