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passing variables

Posted on 2000-01-20
Medium Priority
Last Modified: 2013-12-25
i have this form which has predefined names and values embedded in it, but there are some values that the user can enter... i want to write a script that logs and/or emails those variables and then plug them into another script... kinda like:
http://mydomain.com/cgi-bin/welcome.pl?&name=USERINPUT&name=predefinedvalue&name=USERINPUT&name=value etc

if anyone could give me tips on how i could do this or if i'm making any sense (i've just begun learning basic perl and cgi stuff) or just point me in the right direction, it'd be a great help!
Question by:sayhi
LVL 85

Expert Comment

ID: 2373352
If I am understanding you, it sounds like you want to set a
header, or a <META HTTP-EQUIV="REFRESH"> tag
Or else fetch the URL yourself, which can be be done with perl modules like
use LWP::Simple;
use LWP::UserAgent;

Expert Comment

ID: 2373469
If you use FrontPage Express you can
drop a Submit button, and at forms properties click Settings then write your CGI executable file at Action edit box, select method of sending these values (Post or Get) I prefere Post, because it is more secure, by it you can send password, but you cann't if you use Get, because the password will appear at Address area. when the user open this page and enter some data in different fields then he/she click on Submit button all these data will be sent to your CGI or PERL application.


Expert Comment

ID: 2373814
Hope this helps you out :

####### In your HTML :

<form method=post action=script.pl>

######## In your CGI :


# To handle input from forms / URL

#Putting the Query_string into a variable
      if ($ENV{'REQUEST_METHOD'} eq POST)
            read (STDIN, $QueryString, $DataLength);
            $QueryString = $ENV{'QUERY_STRING'};

#Splitting the pairs and putting them in a list
      @NameValuePairs = split (/&/, $QueryString);

#Preparing for HTML stuff
      open (LOG, ">>log.txt");
      print "Content-type: text/html","\n\n";      # MIME header

      print "<HTML>","\n";
      print "<HEAD>","\n";
      print "<TITLE>","Parameters sent in","</TITLE>","\n";
      print "</HEAD>","\n\n";
      print "<BODY>","\n\n";
#Separating the pairs and displaying them on screen.

      $n = 0;
      foreach $NameValue (@NameValuePairs)
            ($Name, $Value) = split (/=/, $NameValue);
            $Value =~ tr/+/ /;
            $Value =~ s/%([\dA-Fa-f][\dA-Fa-f])/ pack ("C", hex ($1))/eg;

            print LOG "Variable=$Name, Value=$Value <BR>\n";
            print "Variable=$Name, Value=$Value <BR>\n";

      print "</BODY>","\n\n";
      print "</HTML>","\n\n";

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Expert Comment

ID: 2374281
if you want to plug them into another script then yo could write your first script like the one above, but put a form in the returned webpage.

this form should have a hidden field for each value that you want to pass onto the next script, and the submit button should call your new script.

that will pass them onto the new script.

Author Comment

ID: 2376283
ok, i've got a good start with all your comments, BUT i only want to record what the user inputs, can u record only certain variables?
another thing is this LWP module, i looked it up and think it's for people who have there own server. how do i check if my webhosting provider has this module? or can i install this in my directory?

if i can't use this, what's the way to redirect to another URL within the cgi script?

Author Comment

ID: 2376717
well, i figured out how to get the variables i want by doing @userinput = @formdata{'input1', 'input2'};

i think i'll do a little more reading and see what i can do ;)

Author Comment

ID: 2376847
ok this is what i've came up:


require "subparseform.lib";

print "Content-type: text/html\n\n";

@userinput = @formdata{'input1', 'input9'};

$input1 = @formdata{'input1'};
$input9 = @formdata{'input9'};

open (LOG, ">>log.txt");
print LOG "@userinput\n";

#go to 2nd cgi
print <<"REDIRECT";
      <META HTTP-EQUIV="refresh" CONTENT="0; URL=https://some.domain.com/cgi-bin/welcome.pl?&field1=$input1&field2=....&field9=$input9&field10=">


And it works!

still, i've got one more question... how could i do this with the post type method? i know it might have to do something with STDIN.

Accepted Solution

ianB earned 800 total points
ID: 2410921

i am splitting the points on this question, per the users request, the points will be broke like this :

ozo > 65
Motaz > 50
zxr250 > 65
BillyAbbott > 20

Each expert will find their questions posted in this area.

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