#!/usr/bin/perl
# This program accepts input from STDIN and 
# writes it out to a data file called dataOut.dat
# which is in the same directory as this perl code


#open up file dataOut.dat, in same directory
# open to append
if(-e "dataOut.dat")
{	open(OUTFILE, ">>dataOut.dat"); 
	print "Opened file for append "; }
else
{	open(OUTFILE, ">dataOut.dat"); 
	chmod(0766, "dataOut.dat");
	print "Opened file for write";}





#The POST method sends the form information 
# to the STDIN.  The ammount of information sent
# is given by the CONTENT_LENGTH element of the
# %ENV the environmental variable associative array
read(STDIN,$temp,$ENV{'CONTENT_LENGTH'});


#Expect that the input is sent to the program
#as a single string, where we have separated
#individual pieces of information by & 
#EACH individual piece of information is formated
# as follows:
#	name_of_information = value_of_information

#Split the input to seperate all of the Value Pairs
# each pair = {Name, Value}
@pairs = split(/&/,$temp);


#print 2 blank lines to file
print OUTFILE "\n\n";

#Process each pair to clean up all the funky
# +,=, etc. symbols inserted into the information.
# Recall + is used to represent spaces, = separates 
# elements of the Pair {Name=Value}
foreach $item (@pairs) {
        ($key, $content) = split(/=/,$item,2);
        $content =~ tr/+/ /;
        $content =~ s/%(..)/pack("c",hex($1))/ge;

	#now you are ready to print out the value
	#of the current content to the output file
	print OUTFILE "$key : $content \n";

}


#close the output file
close(OUTFILE);

print "Content-type: text/plain\n\n";
print "Thank you for your input";

#exit the program
exit 0;