>>Q1. If I click on a link to go to another HTML page say name.html, I >> lose the "hop=some_data" part. How do I make the "hop=some_data" go >> with the "name.html" with the <a> tag from an HTML document ? Is this >> possible or a script can do this only ? > > there are a couple ways - > one way is to add the "hop=some_data" to the href itself, IF it is a > static string... ie: <a > href="http://www.domain.com/name.html?hop=some_data";> otherwise, you can > implement a simple CGI/Perl script to generate the index page from a > template...
Well the "hop=some_data" is dynamic. Looks like a script is required to do this then, and pass it dynamically to all <a> tag on the page being viewed so that when a new page is clicked on, the "hop=some_data" is preserved. > > >>Q2. The order page calls a Perl script say "orderpage.pl", I want the >> script to capture the "hop=some_data". I got the script to print the >> whole %ENV, and I see no "HTTP_REFERER". I thought "HTTP_REFERER" would >> show the url that called "orderpage.pl" with the "hop=some_data" . But >> if I cannot see "HTTP_REFERER", then how do I get the script to capture >> the >>"hop=some_data" ? > > The ENV variable you are looking for is definitely the QUERY_STRING... > or use STDIN to retrieve POST data... Well from the page http://www.yourdomain.com/index.html?hop=some_data I clicked on a link for the order page which has this <a href="http://www.yourdomain.com/cgi-bin/orderpage.pl?value=some_data_the_order_script_uses";> This shows QUERY_STRING as value=some_data_the_order_script_uses It looks like I need to somehow parse the "hop=some_data" dynamically to the "orderpage.pl" scripts so that when clicked it has this href="http://www.yourdomain.com/cgi-bin/orderpage.pl?value=some_data_the_order_script_uses&hop=some_data"; Any other way I can do this ? > > If you are using perl (looks like you are using a hash there - %ENV) > then you can > either use the CGI module to retrieve the query strings, in which case > you don't > have to worry about that at all, or you can do something like this - > > > my %formData; > > read STDIN, $_, $ENV{'CONTENT_LENGTH'}; #Read in STDIN to default > variable... > %formData = split/&|=/; #Place separate keys/values > into 'formData' hash, split by '&' and '=' > if (!%formData) #- If we didn't get > anything from POST method, > { > $_ = $ENV{'QUERY_STRING'}; # try retrieving it from > QUERY_STRING (GET method) > %formData = split/&|=/; # and split like before. > } > > > Then to access the data, you would go: > my $hop = $formData{'hop'}; > > This is a quick hack - CGI module is much better & more efficient > eg. what happens when you get a number of values from <select multiple> > in > this code? > Thanks for this piece of code. I already have a read_input() sub doing something similar. -- SLUG - Sydney Linux User's Group - http://slug.org.au/ More Info: http://lists.slug.org.au/listinfo/slug
