How to store image in database - mysql

Question

I am trying to insert image in database. The database has a field named images and its type is BLOB. I am trying to insert the image, but only the first 2.2KB is stored. Even if I insert another image it stores only 2.2KB in the database.
When I try to show this image in my application it doesn't show; it's just a small icon, not the image. How can I insert the image in the right way?
use CGI;
my $file = $q->param("file");
$file = 'C:/wamp/bin/apache/apache2.2.22/cgi-bin/images/2.jpg';
open(my $fh, $file);
my $data;
binmode($fh);
read($fh, $data, (stat($fh))[7]);
close($fh);
my $Data = {
table =>'student',
data => {
Image => $fh,
}
};
Data::Insert($Data);
print $q->header;
print $q->start_html(
-title => "student",
);
print $q->end_html;
showImage.pl
my $q = new CGI();
my $handle = Dbm::connection();
$id = $q->param('id_person');
$getimage = $handle->selectrow_array (<<SQLEOF);
SELECT Image
FROM student
WHERE ID = '$id'
SQLEOF
print "Content-Type: image/jpeg\n";
print "Content-length: \n\n";
binmode STDOUT;
print STDOUT $getimage;

Answer 1

My recomendation is keep the image as base 64 encrypted to the db with the MIME type of the image. When you need it, just decrypt it by saying MIME type. This is the mostly used to upload files using ajax. So why can't we use the same way to store image directly to DB?
Just give an additional column to keep MIME type in your table and take it along with the encoded data as print it together.
From a file extension, we can identify the type of file. The MIME type for images are mainly
image/gif: GIF image
image/jpeg: JPEG JFIF image;
image/pjpeg: JPEG JFIF image;
image/png: Portable Network Graphics;
image/svg+xml: SVG vector image;
image/tiff: Tag Image File Format (only for Baseline TIFF);
You can create a new column by giving name as mime_typ . Now when you enctrypt a file using base 64 encryption, keep it as a string like we store usernames and passwords in a table. Similarly add the MIME type to the mime_typ column. when you want to show the image, print the encrypted content after decoding it along with the content in the MIME type, which is stored in the same row in the mime_typ column. You can search google for the way to show an image which is encrypted in base 64 encryption.

Answer 2

You need to read the file in binary mode - i.e.
open(my $fh, $myfile);
my $data;
binmode($fh);
read($fh, $data, (stat($fh))[7]);
close($fh);

Answer 3

I'm not sure why you deleted the database-insert code from the question, but I found it in the revision history.
The issue could be because you aren't not using bind variables, and the binary image contains an escape character which is causing a problem.
I recommend using DBIx::Simple to help create your insert statements that will help create the bind variables for you. DBIx::Simple works with both SQL::Abstract and SQL::Interp. I find SQL::Interp more flexible.
It also appears to be a bug that you are inserting the file handle into the image field instead of the file data. Try adding use File::Slurp (which you may need to install), and then putting this in your %data hash:
Image => scalar read_file($file, { binmode => ':raw' });
Your SELECT statement is also vulnerable to a SQL injection attack because you did not validate the outside input before passing it to the database, and you did not you bind variables again. Using DBIx::Simple, the same code would look like this:
my $db = DBIx::Simple->new($handle);
$getimage = $db->iquery("SELECT Image FROM student WHERE ID = ",\$id)->list;
Also, I recommend omitting the Content-Length header, or properly calculating it, rather than leaving it present in an invalid state.