[英]CGI not processing html form - Perl
I am doing my Perl Assignment for the book database. 我正在为图书数据库进行Perl分配。 I am required to make and html form that, where the user will type input such as:
我需要制作和html表单,用户将在其中键入输入,例如:
1)title 2)author 3)language 4)year 5)sales 1)标题2)作者3)语言4)年5)销售
then i need CGI to process it. 那么我需要CGI来处理它。 and store into database 'books'.
并存储到数据库“书”中。
I am using MySql database. 我正在使用MySql数据库。
The problem I am facing it is not outputting the values I have entered, I tried many ways debugging it, but still no results. 我面临的问题是不输出我输入的值,我尝试了许多调试它的方法,但仍然没有结果。
Here is my html form 'CreateForm.html" 这是我的html表格'CreateForm.html'
<form method="post" action="http://localhost:8080/cgi-bin/create.cgi" >
<table border="1">
<tr>
<td>Title: </td>
<td><input type="text" name="title"></td>
</tr>
<tr>
<td>Author: </td>
<td><input type="text" name="author"></td>
</tr>
<tr>
<td>Language: </td>
<td><input type="text" name="language"></td>
</tr>
<tr>
<td>Year of Publication: </td>
<td><input type="text" name="year"></td>
</tr>
<tr>
<td>Estimated sales: </td>
<td><input type="text" name="sales"></td>
</tr>
<tr>
<td><input type="submit" /></td>
</tr>
</table>
</form>
I am running XAMPP on windows 我在Windows上运行XAMPP
Here is basically my code 'create.cgi' 这基本上是我的代码“ create.cgi”
#!"C:\xampp\perl\bin\perl.exe"
print "Content-type: text/html\r\n\r\n";
#include section
use strict;
use DBI;
use CGI;
my $q=new CGI;
#declaration section
my $name;
my $value;
my $sth;
my %FORM;
my $dbh;
my $sql;
my $rv;
my $key;
my $buffer;
my @pairs;
my $pair;
my $title;
my $author;
my $language;
my $year;
my $sales;
if ($ENV{'REQUEST_METHOD'} eq 'POST') {
read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});
} else {
$buffer = $ENV{'QUERY_STRING'};
}
@pairs = split(/&/, $buffer);
foreach $pair (@pairs) {
($name, $value) = split(/=/, $pair);
$name =~ tr/+/ /;
$name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
$value =~ tr/+/ /;
$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
$FORM{$name} = $value;
}
#parsing data
$title=$q->param('title');
$author=$q->param('author');
$language=$q->param('language');
$year=$q->param('year');
$sales=$q->param('sales');
#database connectivity
$dbh = DBI->connect('DBI:mysql:books', 'root', ''
) || die "Could not connect to database: $DBI::errstr";
#test insert
$sth=$dbh->do('INSERT INTO BOOKS (TITLE,AUTHOR,LANGUAGE,YEAR,SALES) VALUES (
"Nineteen eight four",
"George Orwell",
"English",
1947,
25000000)
');
$sql="INSERT INTO BOOKS (TITLE,AUTHOR,LANGUAGE,YEAR,SALES) values ('$title','$author','$language','$year','$sales')";
$sth=$dbh->prepare($sql) or die "can't prepare $sql: $dbh->errstrn";
$rv=$sth->execute;
if ($rv==1){
print "Record has been successfully created !!!<br>";
}else{
print "Error!!while inserting record\n";
exit;
}
$sth = $dbh->prepare("SELECT * FROM BOOKS");
$sth->execute();
foreach $key(sort keys %FORM){
print "<h3>$key: $FORM{$key}</h3>";
}
print "<html>";
print "<head>";
print "<title>Create Form</title>";
print "</head>";
print "<body>";
print "Title: $FORM{'title'} <br/>";
print "Author: $FORM{'author'} <br/>";
print "Language: $FORM{'language'} <br/>";
print "Year: $FORM{'year'} <br/>";
print "Sales: $FORM{'sales'} <br/>";
foreach $key(sort keys %FORM){
print "<h3>$key: $FORM{$key}</h3>";
}
#retrieving all tables to check
#while (my $ref = $sth->fetchrow_hashref()) {
#print "<br>Found a row:\n
# id = $ref->{'BOOKID'},
# tname = $ref->{'TITLE'},
# author: $ref->{AUTHOR},
# language: $ref->{'LANGUAGE'},
# year: $ref->{'YEAR'},
# sales: $ref->{'SALES'} \n";
#}
#while (my $ref = $sth->fetchrow_hashref()) {
#
# %rec=%{$pRec};
# print "$rec{'title'}";
#}
print "</body>";
print "</html>";
$sth->finish();
$dbh->disconnect();
the line 线
foreach $key(sort keys %FORM){
print "<h3>$key: $FORM{$key}</h3>";
}
doesn't output anything 什么都不输出
the output I receive 我收到的输出
Record has been successfully created !!!
Title:
Author:
Language:
Year:
Sales:
Empty entries, however the INSERT operation has been performed 空条目,但是已执行INSERT操作
30 Nineteen eight four George Orwell English 1947 25000000
Thanks in Advance 提前致谢
I don't understand why you're messing around with the %FORM hash, considering you are correctly accessing the parameters elsewhere, such as: 考虑到您正确访问了其他地方的参数,例如,我不明白为什么要弄乱%FORM哈希:
$title=$q->param('title');
Therefore, why don't you just output $title
? 因此,为什么不只输出
$title
呢?
print "Title: $title <br/>";
If you want a hash with the keys and values of the parameters, then get it into a hashref with: 如果要使用参数的键和值进行哈希处理,请使用以下命令将其放入hashref中:
$params = $q->Vars;
Then, if you want to iterate over that hashref, do something like this: 然后,如果要遍历该hashref,请执行以下操作:
foreach my $key ( sort keys %$params ) {
print "$key has a value of $params->{$key}\n";
}
------------------------ 8< ------------------------ ------------------------ 8 <------------------------
Addendum, not related to the question: 附录,与以下问题无关:
You really don't want to put your values in your SQL the way you are doing it: 您真的不想像这样做那样将值放在SQL中:
$sql="INSERT INTO BOOKS (TITLE,AUTHOR,LANGUAGE,YEAR,SALES) values ('$title','$author','$language','$year','$sales')";
Instead, you want to use placeholders and pass in the parameters to the execute() method: 相反,您想使用占位符并将参数传递给execute()方法:
$sql = "INSERT INTO BOOKS (TITLE,AUTHOR,LANGUAGE,YEAR,SALES) values (?,?,?,?,?)";
$sth = $dbh->prepare($sql) or die "can't prepare $sql: $dbh->errstrn";
$sth->execute( $title, $author, $language, $year, $sales );
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