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- <?php
- /**
- * @file
- * Generates the PDF version using wkhtmltopdf.
- *
- * This file is included by the print_pdf_wkhtmltopdf module and includes the
- * functions that interface with the wkhtmltopdf library.
- *
- * @ingroup print
- */
- /**
- * Implements hook_print_pdf_generate().
- */
- function print_pdf_wkhtmltopdf_print_pdf_generate($html, $meta, $paper_size = NULL, $page_orientation = NULL) {
- $pdf_tool = explode('|', variable_get('print_pdf_pdf_tool', PRINT_PDF_PDF_TOOL_DEFAULT));
- if (empty($paper_size)) {
- $paper_size = variable_get('print_pdf_paper_size', PRINT_PDF_PAPER_SIZE_DEFAULT);
- }
- if (empty($page_orientation)) {
- $page_orientation = variable_get('print_pdf_page_orientation', PRINT_PDF_PAGE_ORIENTATION_DEFAULT);
- }
- $wkhtmltopdf_options = variable_get('print_pdf_wkhtmltopdf_options', PRINT_PDF_WKHTMLTOPDF_OPTIONS);
- $dpi = 96;
- if (!empty($wkhtmltopdf_options) && isset($meta['node'])) {
- $wkhtmltopdf_options = token_replace($wkhtmltopdf_options, array('node' => $meta['node']), array('clear' => TRUE));
- }
- // Build array of single quoted parts, and the same escaped.
- preg_match_all("!'.+?'!", $wkhtmltopdf_options, $matches);
- $quoted = array();
- foreach ($matches[0] as $match) {
- $quoted[escapeshellcmd($match)] = $match;
- }
- // Prevent options that could result in execution of arbitrary commands.
- $wkhtmltopdf_options = escapeshellcmd($wkhtmltopdf_options);
- // Replace sections that were single quoted with original content.
- foreach ($quoted as $search => $replace) {
- $wkhtmltopdf_options = str_replace($search, $replace, $wkhtmltopdf_options);
- }
- $version = print_pdf_wkhtmltopdf_pdf_tool_version($pdf_tool[1], FALSE);
- // 0.10.0 beta2 identifies itself as 0.9.9.
- if (version_compare($version, '0.9.9', '>=')) {
- $wkhtmltopdf_options = '--disable-local-file-access ' . $wkhtmltopdf_options;
- }
- elseif (version_compare($version, '0.9.6', '>=')) {
- $wkhtmltopdf_options = '--disallow-local-file-access ' . $wkhtmltopdf_options;
- }
- else {
- drupal_goto($meta['url']);
- exit;
- }
- // Use basic http authentication to fetch included CSS, etc.
- if (isset($_SERVER['PHP_AUTH_USER']) && isset($_SERVER['PHP_AUTH_PW'])) {
- $wkhtmltopdf_options .= ' --username ' . escapeshellarg($_SERVER['PHP_AUTH_USER']) . ' --password ' . escapeshellarg($_SERVER['PHP_AUTH_PW']);
- }
- $use_input_file = variable_get('print_pdf_wkhtmltopdf_use_input_file', PRINT_PDF_WKHTMLTOPDF_USE_INPUT_FILE_DEFAULT);
- if ($use_input_file) {
- $temp_html = file_unmanaged_save_data($html, drupal_tempnam('temporary://', 'c_html_') . '.html', FILE_EXISTS_RENAME);
- if ($temp_html === FALSE) {
- watchdog('print_pdf', 'wkhtmltopdf: could not create temporary html file: %file', array('%file' => $temp_html));
- drupal_goto($meta['url']);
- return NULL;
- }
- $html_input_parameter = drupal_realpath($temp_html);
- }
- else {
- $temp_html = '';
- $html_input_parameter = '-';
- }
- $descriptor = array(
- 0 => array('pipe', 'r'),
- 1 => array('pipe', 'w'),
- 2 => array('pipe', 'a'),
- );
- $cmd = '"' . realpath($pdf_tool[1]) . "\" -q --page-size $paper_size --orientation $page_orientation --dpi $dpi $wkhtmltopdf_options $html_input_parameter -";
- $process = proc_open($cmd, $descriptor, $pipes, NULL, NULL);
- if (is_resource($process)) {
- if (!$use_input_file) {
- fwrite($pipes[0], $html);
- fclose($pipes[0]);
- }
- $pdf = stream_get_contents($pipes[1]);
- fclose($pipes[1]);
- stream_set_blocking($pipes[2], 0);
- $error = stream_get_contents($pipes[2]);
- fclose($pipes[2]);
- $retval = proc_close($process);
- if (!empty($error) || ($retval != 0)) {
- if (empty($error)) {
- $error = 'No stderr output available.';
- }
- watchdog('print_pdf', 'wkhtmltopdf [%cmd] (returned %ret): %error',
- array('%cmd' => $cmd, '%ret' => $retval, '%error' => $error));
- }
- }
- if ($use_input_file) {
- file_unmanaged_delete($temp_html);
- }
- if (!empty($pdf)) {
- // Remove anything before actual PDF content.
- $pdf = substr($pdf, strpos($pdf, '%PDF-'));
- return $pdf;
- }
- else {
- drupal_set_message(t('Unable to generate PDF file.'), 'error');
- drupal_goto($meta['url']);
- return NULL;
- }
- }
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