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<?php |
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namespace CWP\PDFExport\Extensions; |
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use SilverStripe\Assets\Filesystem; |
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use SilverStripe\Control\Director; |
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use SilverStripe\Control\HTTPRequest; |
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use SilverStripe\Control\HTTPResponse; |
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use SilverStripe\Core\Config\Config; |
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use SilverStripe\Core\Environment; |
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use SilverStripe\Core\Extension; |
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use SilverStripe\Versioned\Versioned; |
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class PdfExportControllerExtension extends Extension |
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{ |
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private static $allowed_actions = [ |
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'downloadpdf', |
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]; |
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/** |
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* Serve the page rendered as PDF. |
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* |
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* @return HTTPResponse|false |
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*/ |
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public function downloadpdf() |
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{ |
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if (!$this->owner->data()->config()->get('pdf_export')) { |
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return false; |
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} |
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// We only allow producing live pdf. There is no way to secure the draft files. |
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Versioned::set_stage(Versioned::LIVE); |
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$path = $this->owner->data()->getPdfFilename(); |
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if (!file_exists($path)) { |
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$this->owner->generatePDF(); |
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} |
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return HTTPRequest::send_file(file_get_contents($path), basename($path), 'application/pdf'); |
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} |
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/** |
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* This will return either pdf_base_url from YML, CWP_SECURE_DOMAIN from _ss_environment, or blank. In that |
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* order of importance. |
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* |
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* @return string |
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*/ |
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public function getPDFBaseURL() |
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{ |
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// if base url YML is defined in YML, use that |
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if ($this->owner->data()->config()->get('pdf_base_url')) { |
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$pdfBaseUrl = $this->owner->data()->config()->get('pdf_base_url').'/'; |
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// otherwise, if we are CWP use the secure domain |
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} elseif (Environment::getEnv('CWP_SECURE_DOMAIN')) { |
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$pdfBaseUrl = Environment::getEnv('CWP_SECURE_DOMAIN') . '/'; |
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// or if neither, leave blank |
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} else { |
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$pdfBaseUrl = ''; |
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} |
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return $pdfBaseUrl; |
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} |
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/** |
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* Don't use the proxy if the pdf domain is the CWP secure domain or if we aren't on a CWP server |
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* |
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* @return string |
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*/ |
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public function getPDFProxy($pdfBaseUrl) |
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{ |
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if (!Environment::getEnv('CWP_SECURE_DOMAIN') |
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|| $pdfBaseUrl == Environment::getEnv('CWP_SECURE_DOMAIN') . '/' |
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) { |
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$proxy = ''; |
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} else { |
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$proxy = ' --proxy ' . Environment::getEnv('SS_OUTBOUND_PROXY') |
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. ':' . Environment::getEnv('SS_OUTBOUND_PROXY_PORT'); |
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} |
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return $proxy; |
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} |
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/** |
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* Render the page as PDF using wkhtmltopdf. |
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* |
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* @return HTTPResponse|false |
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*/ |
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public function generatePDF() |
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{ |
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if (!$this->owner->data()->config()->get('pdf_export')) { |
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return false; |
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} |
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$binaryPath = $this->owner->data()->config()->get('wkhtmltopdf_binary'); |
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if (!$binaryPath || !is_executable($binaryPath)) { |
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if (Environment::getEnv('WKHTMLTOPDF_BINARY') |
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&& is_executable(Environment::getEnv('WKHTMLTOPDF_BINARY')) |
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) { |
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$binaryPath = Environment::getEnv('WKHTMLTOPDF_BINARY'); |
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} |
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} |
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if (!$binaryPath) { |
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user_error( |
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'Neither WKHTMLTOPDF_BINARY nor ' . get_class($this->owner->data()) . '.wkhtmltopdf_binary are defined', |
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E_USER_ERROR |
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); |
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} |
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if (Versioned::get_reading_mode() == 'Stage.Stage') { |
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user_error('Generating PDFs on draft is not supported', E_USER_ERROR); |
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} |
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set_time_limit(60); |
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// prepare the paths |
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$pdfFile = $this->owner->data()->getPdfFilename(); |
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$bodyFile = str_replace('.pdf', '_pdf.html', $pdfFile); |
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$footerFile = str_replace('.pdf', '_pdffooter.html', $pdfFile); |
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// make sure the work directory exists |
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if (!file_exists(dirname($pdfFile))) { |
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Filesystem::makeFolder(dirname($pdfFile)); |
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} |
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//decide the domain to use in generation |
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$pdfBaseUrl = $this->owner->getPDFBaseURL(); |
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// Force http protocol on CWP - fetching from localhost without using the proxy, SSL terminates on gateway. |
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if (Environment::getEnv('CWP_ENVIRONMENT')) { |
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Config::modify()->set(Director::class, 'alternate_protocol', 'http'); |
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//only set alternate protocol if CWP_SECURE_DOMAIN is defined OR pdf_base_url is |
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if ($pdfBaseUrl) { |
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Config::modify()->set(Director::class, 'alternate_base_url', 'http://' . $pdfBaseUrl); |
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} |
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} |
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$bodyViewer = $this->owner->getViewer('pdf'); |
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// write the output of this page to HTML, ready for conversion to PDF |
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file_put_contents($bodyFile, $bodyViewer->process($this->owner)); |
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// get the viewer for the current template with _pdffooter |
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$footerViewer = $this->owner->getViewer('pdffooter'); |
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// write the output of the footer template to HTML, ready for conversion to PDF |
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file_put_contents($footerFile, $footerViewer->process($this->owner)); |
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//decide what the proxy should look like |
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$proxy = $this->owner->getPDFProxy($pdfBaseUrl); |
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// finally, generate the PDF |
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$command = $binaryPath . $proxy . ' --outline -B 40pt -L 20pt -R 20pt -T 20pt --encoding utf-8 ' |
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. '--orientation Portrait --disable-javascript --quiet --print-media-type '; |
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$retVal = 0; |
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$output = []; |
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exec( |
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$command . " --footer-html \"$footerFile\" \"$bodyFile\" \"$pdfFile\" &> /dev/stdout", |
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$output, |
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$retVal |
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); |
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// remove temporary file |
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unlink($bodyFile); |
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unlink($footerFile); |
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// output any errors |
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if ($retVal != 0) { |
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user_error('wkhtmltopdf failed: ' . implode("\n", $output), E_USER_ERROR); |
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} |
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// serve the generated file |
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return HTTPRequest::send_file(file_get_contents($pdfFile), basename($pdfFile), 'application/pdf'); |
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} |
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} |
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silverstripe /
cwp-pdfexport
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