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Using POST Methods in Perl
A more reliable method of passing information to a CGI program is the POST method. This packages the information in exactly the same way as GET methods, but instead of sending it as a text string after a ? in the URL, it sends it as a separate message as a part of HTTP header. Web server provides this message to the CGI script in the form of the standard input.
Below is the Perl script called hello_post.cgi, to handle input given by the web browser. This script will handle GET as well as POST method.
#!/usr/bin/perl local ($buffer, @pairs, $pair, $name, $value, %FORM); # Read in text $ENV{'REQUEST_METHOD'} =~ tr/a-z/A-Z/; if ($ENV{'REQUEST_METHOD'} eq "POST") { read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'}); } else { $buffer = $ENV{'QUERY_STRING'}; } # Split information into name/value pairs @pairs = split(/&/, $buffer); foreach $pair (@pairs) { ($name, $value) = split(/=/, $pair); $value =~ tr/+/ /; $value =~ s/%(..)/pack("C", hex($1))/eg; $FORM{$name} = $value; } $first_name = $FORM{first_name}; $last_name = $FORM{last_name}; print "Content-type:text/html\r\n\r\n"; print "<html>"; print "<head>"; print "<title>Hello - Second CGI Program</title>"; print "</head>"; print "<body>"; print "<h2>Hello $first_name $last_name - Second CGI Program</h2>"; print "</body>"; print "</html>"; 1;
Updated on: 2019-12-02T08:11:48+05:30
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