CGI.pm: Difference between revisions
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{{Short description|Perl module for web applications}} |
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{{primary sources|date=September 2011}} |
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{{one source |date=April 2024}} |
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| name = CGI.pm |
| name = CGI.pm |
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| logo = |
| logo = |
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| screenshot = |
| screenshot = |
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| caption = |
| caption = |
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| author = [[Lincoln |
| author = [[Lincoln Stein]] |
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| developer = |
| developer = Lee Johnson |
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| released = |
| released = |
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| latest release version = |
| latest release version = 4.21 |
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| latest release date = |
| latest release date = 2015-06-22 |
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| latest preview version = |
| latest preview version = |
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| latest preview date = |
| latest preview date = |
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| platform = [[Perl]] |
| platform = [[Perl]] |
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| language = |
| language = |
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| status = |
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| genre = [[Perl module]] for [[Common Gateway Interface|CGI]] |
| genre = [[Perl module]] for [[Common Gateway Interface|CGI]] |
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| license = |
| license = |
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| website = |
| website = {{URL|https://metacpan.org/release/CGI}} |
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}} |
}} |
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'''CGI.pm''' is a large and widely used [[Perl module]] for [[Computer programming|programming]] [[Common Gateway Interface]] (CGI) [[WWW|web]] applications, providing a consistent [[Application programming interface|API]] for receiving user input and producing [[HTML]] or [[XHTML]] output. |
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'''CGI.pm''' is a large and once widely used [[Perl module]] for [[Computer programming|programming]] [[Common Gateway Interface]] (CGI) [[WWW|web]] applications, providing a consistent [[Application programming interface|API]] for receiving and processing user input. There are also functions for producing [[HTML]] or [[XHTML]] output, but these are now unmaintained and are to be avoided.<ref name="auto">{{Cite web|url=https://metacpan.org/dist/CGI/view/lib/CGI.pod|title=CGI - Handle Common Gateway Interface requests and responses - metacpan.org|website=metacpan.org}}</ref> CGI.pm was a core Perl module but has been removed as of v5.22 of Perl.<ref name="auto"/> The module was written by [[Lincoln Stein]] and is now maintained by Lee Johnson. |
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The module is written and maintained by [[Lincoln D. Stein]]. |
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== |
== Examples == |
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Here is a simple CGI page, written in Perl using CGI.pm (in [[Object-oriented programming|object |
Here is a simple CGI page, written in Perl using CGI.pm (in [[Object-oriented programming|object-oriented]] style): |
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#!/usr/bin/perl -w |
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# |
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use strict; |
use strict; |
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use warnings; |
use warnings; |
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use CGI; |
use CGI; |
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my $cgi = CGI->new |
my $cgi = CGI->new; |
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print $cgi->header('text/html'); |
print $cgi->header('text/html'); |
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print $cgi->start_html('A Simple CGI Page'), |
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$cgi->start_form, |
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'Name: ', |
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$cgi->textfield('name'), $cgi->br, |
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'Age: ', |
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$cgi->textfield('age'), $cgi->p, |
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$cgi->submit('Submit!'), |
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$cgi->end_form, $cgi->p, |
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$cgi->hr; |
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print << "EndOfHTML"; |
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<!DOCTYPE html> |
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<html> |
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<head> |
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> |
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</head> |
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<body> |
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<form method="post" enctype="multipart/form-data"> |
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Name: <input type="text" name="name" /><br /> |
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Age: <input type="text" name="age" /><p> |
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<input type="submit" name="Submit!" value="Submit!" /> |
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</form> |
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EndOfHTML |
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} |
} |
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if ( $cgi->param('age') ) { |
if ( my $age = $cgi->param('age') ) { |
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print |
print "You are $age years old."; |
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} |
} |
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print |
print '</body></html>'; |
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</syntaxhighlight> |
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</source> |
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This would print a very simple webform, asking for your name and age, and after having been submitted, redisplaying the form with the name and age displayed below it. This sample makes use of CGI.pm's object-oriented abilities; it can also be done by calling functions directly, without the |
This would print a very simple webform, asking for your name and age, and after having been submitted, redisplaying the form with the name and age displayed below it. This sample makes use of CGI.pm's object-oriented abilities; it can also be done by calling functions directly, without the {{mono|$cgi->}}, however the necessary functions must be imported into the namespace of the script that requires access to those functions: |
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#!perl |
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Here is another script that produces the same output using CGI.pm's [[Procedural programming|procedural]] interface: |
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use strict; |
use strict; |
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use warnings; |
use warnings; |
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use CGI |
use CGI qw/ :standard /; |
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print header |
print header('text/html'); |
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start_html('A Simple CGI Page'), |
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start_form, |
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'Name: ', |
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textfield('name'), br, |
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'Age: ', |
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textfield('age'), p, |
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submit('Submit!'), |
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end_form, p, |
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# ... HTML output same as above example |
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if ( my $name = param('name') ) { |
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print end_html; |
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</source> |
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} |
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if ( my $age = param('age') ) { |
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} |
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print '</body></html>'; |
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</syntaxhighlight> |
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==See also== |
==See also== |
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*[[ |
*[[mod_perl]] |
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==References== |
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{{Reflist}} |
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==External links== |
==External links== |
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*[http://stein.cshl.org/WWW/software/CGI/ Official homepage] |
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*[ |
*[https://metacpan.org/module/CGI CGI.pm] – at the [[CPAN]] |
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{{unix-stub}} |
{{unix-stub}} |
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Latest revision as of 02:53, 17 October 2024
This article relies largely or entirely on a single source. (April 2024) |
Original author(s) | Lincoln Stein |
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Developer(s) | Lee Johnson |
Stable release | 4.21
/ 2015-06-22 |
Platform | Perl |
Type | Perl module for CGI |
Website | metacpan |
CGI.pm is a large and once widely used Perl module for programming Common Gateway Interface (CGI) web applications, providing a consistent API for receiving and processing user input. There are also functions for producing HTML or XHTML output, but these are now unmaintained and are to be avoided.[1] CGI.pm was a core Perl module but has been removed as of v5.22 of Perl.[1] The module was written by Lincoln Stein and is now maintained by Lee Johnson.
Examples
[edit]Here is a simple CGI page, written in Perl using CGI.pm (in object-oriented style):
#!/usr/bin/env perl
use strict;
use warnings;
use CGI;
my $cgi = CGI->new;
print $cgi->header('text/html');
print << "EndOfHTML";
<!DOCTYPE html>
<html>
<head>
<title>A Simple CGI Page</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body>
<h1>A Simple CGI Page</h1>
<form method="post" enctype="multipart/form-data">
Name: <input type="text" name="name" /><br />
Age: <input type="text" name="age" /><p>
<input type="submit" name="Submit!" value="Submit!" />
</form>
<hr />
EndOfHTML
if ( my $name = $cgi->param('name') ) {
print "Your name is $name.<br />";
}
if ( my $age = $cgi->param('age') ) {
print "You are $age years old.";
}
print '</body></html>';
This would print a very simple webform, asking for your name and age, and after having been submitted, redisplaying the form with the name and age displayed below it. This sample makes use of CGI.pm's object-oriented abilities; it can also be done by calling functions directly, without the $cgi->, however the necessary functions must be imported into the namespace of the script that requires access to those functions:
#!perl
use strict;
use warnings;
use CGI qw/ :standard /;
print header('text/html');
# ... HTML output same as above example
if ( my $name = param('name') ) {
print "Your name is $name.<br />";
}
if ( my $age = param('age') ) {
print "You are $age years old.";
}
print '</body></html>';
Note: in many examples $q, short for query, is used to store a CGI object.
See also
[edit]References
[edit]External links
[edit]