public function extractXMLText()
{
// Temporary XML output.
$temp_xml = $this->temp_path . DIRECTORY_SEPARATOR . $this->file_name;
// SQLite storage.
$temp_db = $this->pdf_cache_path . DIRECTORY_SEPARATOR . $this->file_name . '.sq3';
// Database not found. Check the log whether conversion is running. If yes, delay.
if (!file_exists($temp_db) || filemtime($temp_db) < filemtime($this->pdf_full_path)) {
for ($i = 1; $i <= 60; $i++) {
if ($this->checkPDFLog($this->file_name . '.sq3')) {
usleep(500000);
}
}
}
if (!file_exists($temp_db) || filemtime($temp_db) < filemtime($this->pdf_full_path)) {
// Delete stale database.
if (file_exists($temp_db)) {
unlink($temp_db);
}
// Write to log file.
$logHandle = database_connect($this->pdf_cache_path, 'pdflog');
$logHandle->exec("CREATE TABLE IF NOT EXISTS files (file TEXT PRIMARY KEY)");
$file_q = $logHandle->quote($this->file_name . '.sq3');
$insert = $logHandle->exec("INSERT OR IGNORE INTO files VALUES({$file_q})");
$logHandle = null;
// IMPORTANT: If no insert due to unique constraint, exit.
if ($insert == 0) {
return;
}
// XML output file not found. Create one.
if (!file_exists($temp_xml . '.xml')) {
system(select_pdftohtml() . ' -q -enc UTF-8 -nomerge -i -hidden -xml "' . $this->pdf_full_path . '" "' . $temp_xml . '"');
}
if (!file_exists($temp_xml . '.xml')) {
sendError('PDF to XML conversion failed.');
}
$dbHandle = database_connect($this->pdf_cache_path, $this->file_name);
$dbHandle->exec("CREATE TABLE IF NOT EXISTS texts (" . "id INTEGER PRIMARY KEY, " . "top TEXT NOT NULL DEFAULT '', " . "left TEXT NOT NULL DEFAULT '', " . "height TEXT NOT NULL DEFAULT '', " . "width TEXT NOT NULL DEFAULT '', " . "text TEXT NOT NULL DEFAULT '', " . "page_number INTEGER NOT NULL DEFAULT '')");
// Try to repair some malformed files.
$string = file_get_contents($temp_xml . '.xml');
$string = preg_replace('/[^\\x{0009}\\x{000a}\\x{000d}\\x{0020}-\\x{D7FF}\\x{E000}-\\x{FFFD}\\x{10000}-\\x{10FFFF}]+/u', ' ', $string);
$string = preg_replace('/\\s{2,}/ui', ' ', $string);
$string = str_ireplace('<!doctype pdf2xml system "pdf2xml.dtd">', '<!DOCTYPE pdf2xml SYSTEM "pdf2xml.dtd">', $string);
// Load XML file into object.
$xml = @simplexml_load_string($string);
if ($xml === FALSE) {
sendError('Invalid XML encoding.');
}
$dbHandle->beginTransaction();
// Iterate XML page by page.
foreach ($xml->page as $page) {
// Get page number and size.
foreach ($page->attributes() as $a => $b) {
if ($a == 'number') {
$page_number = (string) $b;
}
if ($a == 'height') {
$page_height = (string) $b;
}
if ($a == 'width') {
$page_width = (string) $b;
}
}
// Sanitize db input.
$page_number_q = $dbHandle->quote($page_number);
// Get info on each text element.
$i = 0;
foreach ($page->text as $row) {
$row = strip_tags($row->asXML());
foreach ($page->text[$i]->attributes() as $a => $b) {
if ($a == 'top') {
$row_top = 100 * round($b / $page_height, 3);
}
if ($a == 'left') {
$row_left = 100 * round($b / $page_width, 3);
}
if ($a == 'height') {
$row_height = 100 * round($b / $page_height, 3);
}
if ($a == 'width') {
$row_width = 100 * round($b / $page_width, 3);
}
}
$i = $i + 1;
// Sanitize db input.
$row_top_q = $dbHandle->quote($row_top);
$row_left_q = $dbHandle->quote($row_left);
$row_height_q = $dbHandle->quote($row_height);
$row_width_q = $dbHandle->quote($row_width);
$row_q = $dbHandle->quote($row);
$dbHandle->exec("INSERT INTO texts (top,left,height,width,text,page_number) " . "VALUES({$row_top_q}, {$row_left_q}, {$row_height_q}, {$row_width_q}, {$row_q}, {$page_number_q})");
}
}
$dbHandle->commit();
$dbHandle->exec("CREATE INDEX IF NOT EXISTS ind_pages ON texts(page_number)");
$dbHandle = null;
// We are done, delete from log.
$logHandle = database_connect($this->pdf_cache_path, 'pdflog');
$file_q = $logHandle->quote($this->file_name . '.sq3');
$logHandle->exec("DELETE FROM files WHERE file={$file_q}");
$logHandle = null;
// Delete XML file.
unlink($temp_xml . '.xml');
}
}
exec(select_pdftotext() . ' test.pdf "' . $temp_dir . DIRECTORY_SEPARATOR . 'test.txt"');
if (file_exists($temp_dir . DIRECTORY_SEPARATOR . 'test.txt')) {
unlink($temp_dir . DIRECTORY_SEPARATOR . 'test.txt');
die('OK');
} else {
die;
}
} elseif ($_GET['binary'] == 'pdfinfo') {
exec(select_pdfinfo() . ' test.pdf', $output);
if (!empty($output)) {
die('OK');
} else {
die;
}
} elseif ($_GET['binary'] == 'pdftohtml') {
exec(select_pdftohtml() . ' -q -noframes -enc UTF-8 -nomerge -c -xml test.pdf "' . $temp_dir . DIRECTORY_SEPARATOR . 'test"');
if (file_exists($temp_dir . DIRECTORY_SEPARATOR . 'test.xml')) {
unlink($temp_dir . DIRECTORY_SEPARATOR . 'test.xml');
die('OK');
} else {
die;
}
} elseif ($_GET['binary'] == 'ghostscript') {
exec(select_ghostscript() . ' -sDEVICE=png16m -r15 -dTextAlphaBits=1 -dGraphicsAlphaBits=1 -dFirstPage=1 -dLastPage=1 -o "' . $temp_dir . DIRECTORY_SEPARATOR . 'test.png" test.pdf');
if (file_exists($temp_dir . DIRECTORY_SEPARATOR . 'test.png')) {
unlink($temp_dir . DIRECTORY_SEPARATOR . 'test.png');
die('OK');
} else {
die;
}
} elseif ($_GET['binary'] == 'pdftk') {
$file = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'library' . DIRECTORY_SEPARATOR . $file_name;
if (!file_exists($file)) {
die('Error! PDF does not exist!');
}
} else {
die('Error! No PDF provided!');
}
$page = '';
if (!empty($_GET['page'])) {
$page = intval($_GET['page']);
} else {
die('Error! No page number provided!');
}
$temp_xml = $temp_dir . DIRECTORY_SEPARATOR . $file_name;
if (!file_exists($temp_xml . $page . '.xml') || filemtime($temp_xml . $page . '.xml') < filemtime($file)) {
system(select_pdftohtml() . ' -q -noframes -enc UTF-8 -nomerge -c -i -xml -f ' . $page . ' -l ' . $page . ' "' . $file . '" "' . $temp_xml . $page . '"');
}
if (file_exists($temp_xml . $page . '.xml')) {
$string = file_get_contents($temp_xml . $page . '.xml');
$string = preg_replace('/[^\\x{0009}\\x{000a}\\x{000d}\\x{0020}-\\x{D7FF}\\x{E000}-\\x{FFFD}]+/u', ' ', $string);
$string = preg_replace('/\\s{2,}/ui', ' ', $string);
$string = str_ireplace('<!doctype pdf2xml system "pdf2xml.dtd">', '<!DOCTYPE pdf2xml SYSTEM "pdf2xml.dtd">', $string);
$xml = @simplexml_load_string($string);
if (!$xml) {
die('{"Error":"Invalid XML encoding!"}');
}
foreach ($xml->page->attributes() as $a => $b) {
if ($a == 'height') {
$page_height = $b;
}
if ($a == 'width') {
exec(select_pdftotext() . ' -enc UTF-8 test.pdf "' . IL_TEMP_PATH . DIRECTORY_SEPARATOR . 'test.txt"');
if (file_exists(IL_TEMP_PATH . DIRECTORY_SEPARATOR . 'test.txt')) {
unlink(IL_TEMP_PATH . DIRECTORY_SEPARATOR . 'test.txt');
die('OK');
} else {
die;
}
} elseif ($_GET['binary'] == 'pdfinfo') {
exec(select_pdfinfo() . ' test.pdf', $output);
if (!empty($output)) {
die('OK');
} else {
die;
}
} elseif ($_GET['binary'] == 'pdftohtml') {
exec(select_pdftohtml() . ' -q -noframes -enc UTF-8 -nomerge -c -xml test.pdf "' . IL_TEMP_PATH . DIRECTORY_SEPARATOR . 'test"');
if (file_exists(IL_TEMP_PATH . DIRECTORY_SEPARATOR . 'test.xml')) {
unlink(IL_TEMP_PATH . DIRECTORY_SEPARATOR . 'test.xml');
die('OK');
} else {
die;
}
} elseif ($_GET['binary'] == 'pdfdetach') {
exec(select_pdfdetach() . ' -saveall -o "' . IL_TEMP_PATH . '" test.pdf');
if (is_readable(IL_TEMP_PATH . DIRECTORY_SEPARATOR . 'test.odt') && filesize(IL_TEMP_PATH . DIRECTORY_SEPARATOR . 'test.odt') > 0) {
unlink(IL_TEMP_PATH . DIRECTORY_SEPARATOR . 'test.odt');
die('OK');
} else {
die;
}
} elseif ($_GET['binary'] == 'ghostscript') {
