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| #!/usr/bin/env php
<?php
/**
* Extract base64 encoded images from an HTML file.
* Saves the images as files and replaces the base64 images with
* the file paths.
*
* Useful for LibreOffice/OpenOffice HTML exports.
*
* Usage:
* $ ./htmlbase64extractor.php file.html > fixed.html
*
* Licensed in the public domain
*
* @author Christian Weiske <weiske@mogic.com>
*/
if ($argc < 2) {
echo "File missing\n";
exit(1);
}
$map = array(
'image/jpg' => 'jpg',
'image/jpeg' => 'jpg',
'image/png' => 'png',
'image/gif' => 'gif',
);
$file = $argv[1];
$imgdir = $file . '-images/';
$relimgdir = basename($file . '-images/') . '/';
if (!is_dir($imgdir)) {
mkdir($imgdir);
}
$content = file_get_contents($file);
$imgcounter = 0;
$content2 = preg_replace_callback(
'#data:(image/[^;]*);base64,([a-zA-Z0-9+/=]*)#',
'extractImage',
$content
);
echo $content2;
function extractImage($matches)
{
global $imgcounter, $imgdir, $relimgdir, $map;
list(, $type, $base64) = $matches;
if ($type == 'image/*') {
//fixme: detect image type
$type = 'image/png';
}
$filename = 'image-' . $imgcounter++ . '.' . $map[$type];
file_put_contents($imgdir . $filename, base64_decode($base64));
return $relimgdir . $filename;
}
?>
|
