Re: [MacPerl-WebCGI] Can a cgi script call an URL?

[Riccardo Perotti <perotti@pobox.com>]

Bruce:

Thanks a lot!

Do I understand correctly, then, in assuming that I can make a script do:

print "Location: www.domain.com/cgi-bin/next.cgi? this=that&foo=fee\n\n"

and, unless I had done the 'print "Content-type: text/html\n\n"' thing,
it'll just call the other script and pass it that info?

Would that info get to the other script as $ENV{'QUERY_STRING'} as well?

What if I passed it a path info ie: "this/path/to/thisfile.txt\n\n" , where
would it be? Is there a $ENV{ ? } for this?


Thank you again!

Riccardo
--
mailto:perotti@pobox.com


> From: Bruce Van Allen <bva@cruzio.com>
> Reply-To: Bruce Van Allen <bva@cruzio.com>
> Date: Sun, 25 Jun 2000 22:48:18 -0700
> To: Riccardo Perotti <perotti@pobox.com>, "macperl-webcgi@macperl.org List"
> <macperl-webcgi@macperl.org>
> Subject: Re: [MacPerl-WebCGI] Can a cgi script call an URL?
> 
> At 10:57 PM 6/25/00, Riccardo Perotti wrote:
>> Hi all:
>> 
>> I saw it in some script:
>> 
>> Print "Location: www.domain.com/hatever.html"
>> 
>> Is this script telling the browser to "go there"? or is it just "printing"
>> the URL into the browser's Location (the user needing to press enter of 'go'
>> or whatever in his bowser)?
> 
> "Go there." And, yes to your previous question. If a CGI script named
> www.domain.com/path/a.cgi executes the statement
> 
> print "Location: www.domain.com/another/path/b.cgi\n\n";
> 
> then what goes to the user's browser will be the output of b.cgi
> 
> assuming b.cgi exists, etc. The first can pass query strings and path
> info to the second, too:
> 
> print "Location: www.domain.com/another/path/b.cgi?id=xyz123\n\n";
> 
> print "Location: www.domain.com/another/path/b.cgi/morepath/datafile.txt\n\n";
> 
> But:
> a. the Perl function 'print' is all lower case.
> 
> b. "Location: [URL]" is an http header, so it must have a blank line
> immediately following, hence the two 'newlines' (\n\n but see *).
> 
> c. If your script has already executed
> 
> print "Content-type: text/html\n\n"
> 
> in preparation for sending some HTML back to the user, then print
> "Location: ... " won't work, or rather, you'll get "Location: ..."
> printed out somewhere on screen, and it won't be a link either.
> 
> 
> * Here's a potentially confusing diversion NOT relevant to your
> question about print "Location: ...", but since I used "\n\n" above,
> there's bound to be an objection:
> 
> Be careful: in Perl \n stands for whatever the local 'newline' is for
> the OS it's operating under, which means that in MAC OS it's really
> \r or \015 (Carriage Return), in UNIXish it's really \n or \012 (Line
> Feed), and in DOS/Win it's really \n\r or \015\012 (CRLF). Most of
> the time, Perl hides this problem from you, and it's safe to use
> "\n\n". Crossing platforms takes a little more care, such as when
> counting characters, or processing <TEXTAREA> input in which the user
> has hit Return. If you really want to cover all eventualities, then
> filter your input like this:
> 
> $line =~ s/\015\012?|\012/\n/g;
> 
> HTH
> 
> 1;
> 
> 
> -- 
> 
> - Bruce
> 
> __Bruce_Van_Allen___bva@cruzio.com__Santa_Cruz_CA__
> 
> ==== Want to unsubscribe from this list?
> ==== Send mail with body "unsubscribe" to macperl-webcgi-request@macperl.org


==== Want to unsubscribe from this list?
==== Send mail with body "unsubscribe" to macperl-webcgi-request@macperl.org