wkhtmltoimage convert html to image Perl and Centos

Question

I am trying to use wkhtmltoimage to convert html and web pages to images using Perl module WKHTMLTOPDF. The script and code below works from the command line but does not work if I call the script from browser.

Update:

If I run the script from the shell as a root user, it runs without
error, if I switch to the domain user where the script is located,
I get that error, seems it is executable permissions for domain owner.

The error is:

error running '/usr/local/bin/wkhtmltoimage': '/usr/local/bin/wkhtmltoimage http://yahoo.com 
/home/xxxx/public_html/pdfwebkit/output.png' died with signal 11, with coredump at 
/usr/local/perl-5.18.1/lib/site_perl/5.18.1/MooseX/Role/Cmd.pm line 128.
MooseX::Role::Cmd::run(WKHTMLTOPDF=HASH(0x2714260), "http://yahoo.com", 
"/home/xxxx/public_html/pdfwebkit/output.png") called at /usr/local/
perl-5.18.1/lib/site_perl/5.18.1/WKHTMLTOPDF.pm line 645 WKHTMLTOPDF::generate(WKHTMLT
OPDF=HASH(0x2714260)) called at htmltoimage.cgi line xxx main::convert_using_WKHTMLTOPDF_image("http://yahoo.com", 
"/home/xxxx/public_html/pdfwebkit/output.png") called at htmltoimage.cgi line xx

The code I am using is:

#!/usr/bin/perl
#!C:\perl\bin\perl.exe
print "Content-type: text/html;charset=utf-8\n\n";
use File::Spec::Functions;
use File::Basename;
BEGIN {
    $|=1;
    use CGI::Carp qw(fatalsToBrowser set_message);
    sub handle_errors {
        #print "Content-type: text/html;charset=utf-8\n\n";
        my $msg = shift;
        print qq!<h1><font color="red">Software Error</font></h1>!;
        print qq!<p>$msg</p>!;
    }
    set_message(\&handle_errors);
}

$|=1;
my ($Script, $Bin);
if ($ENV{SCRIPT_FILENAME}) {
    ($Script, $Bin) = fileparse($ENV{SCRIPT_FILENAME});
}
else {
    ($Script, $Bin) = fileparse(__FILE__);
}

use WKHTMLTOPDF;

    my $outfile = catfile ($Bin, 'output.jpg');
    print "Converting url to image file $outfile...<br>\n";
    convert_using_WKHTMLTOPDF_image('http://yahoo.com', $outfile);
    print "Finished...<br>\n";
    exit;

sub convert_using_WKHTMLTOPDF_image {
    my ($page, $output) = @_;
    my $pdf = new WKHTMLTOPDF;
    my $bin = '/usr/local/bin/wkhtmltoimage';
    #my $bin = 'C:/Program Files/wkhtmltopdf/bin/wkhtmltoimage.exe';
    $pdf->bin_name($bin);
    $pdf->_input_file($page);
    $pdf->_output_file($output);
    #$pdf->grayscale(1);
    $pdf->generate;
}

sub convert_html_to_image_direct {
    my ($page, $output) = @_;
    my $bin = '/usr/local/bin/wkhtmltoimage --quiet ';
    my $out = `$bin $page $output`;
    print "out: $out<br>\n";
    return $out;
}

The code works on Windows from the browser normal. I am having the same issue if I try to use wkhtmltopdf for converting html to pdf.

The way I installed the binary are from here:

https://gist.github.com/DaRamirezSoto/5489861

# wget http://wkhtmltopdf.googlecode.com/files/wkhtmltoimage-0.11.0_rc1-static-amd64.tar.bz2
# wget http://wkhtmltopdf.googlecode.com/files/wkhtmltopdf-0.11.0_rc1-static-amd64.tar.bz2
# tar xvjf wkhtmltoimage-0.11.0_rc1-static-amd64.tar.bz2
# tar xvjf wkhtmltopdf-0.11.0_rc1-static-amd64.tar.bz2
# chown root:root wkhtmltopdf-amd64
# chown root:root wkhtmltoimage-amd64
# mv wkhtmltopdf-amd64 /usr/bin/wkhtmltopdf
# mv wkhtmltoimage-amd64 /usr/bin/wkhtmltoimage

// dependencies
# yum install -y libXrender libXext openssl openssl-devel fontconfig

score 0 · Answer 1 · answered Jan 19 '15 at 21:43

0

I tested (in IE 11/Win 8.1) using Centos 6 server, worked fine with a little change to the path to the folder where I wanted it to be saved in.

My output was Converting url to image file /home/user/../bittertruth.jpg... Finished...

which is just as expected by you....

answered Jan 19 '15 at 21:43

bislinks

84
10

Is it a permissions on the bin file or web server user permissions? my server is Apache on Centos 6. – daliaessam Jan 19 '15 at 21:53
On the commandline, I had no error for 2 out of 3 different URLs I tried this script on! The changes I made are on these lines: my $outfile = catfile ("/home/../../outputfolder/", 'output.jpg'); convert_using_WKHTMLTOPDF_image('http://SITENAME.com, "$outfile"); I did not use $Script, $Bin! – bislinks Jan 19 '15 at 22:10
As far as permissions, I have 0755 for the output folder, while 0744 also would be fine. Make sure your script has a permission of 0755! – bislinks Jan 19 '15 at 22:22
The script has 0755 and it runs and prints the above error. Something is happening I do not know. – daliaessam Jan 19 '15 at 22:55

wkhtmltoimage convert html to image Perl and Centos

1 Answers1