2023-08-01 01:03:13 +02:00
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package stirling.software.SPDF.utils;
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import java.io.ByteArrayInputStream;
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import java.io.IOException;
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2024-01-28 18:36:17 +01:00
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import java.nio.charset.StandardCharsets;
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2023-08-01 01:03:13 +02:00
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipInputStream;
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2024-01-28 18:36:17 +01:00
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import stirling.software.SPDF.model.api.converters.HTMLToPdfRequest;
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2023-08-01 01:03:13 +02:00
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import stirling.software.SPDF.utils.ProcessExecutor.ProcessExecutorResult;
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public class FileToPdf {
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2024-01-09 23:39:21 +01:00
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public static byte[] convertHtmlToPdf(
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2024-01-28 18:36:17 +01:00
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HTMLToPdfRequest request,
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byte[] fileBytes,
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String fileName,
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boolean htmlFormatsInstalled)
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2023-08-01 01:03:13 +02:00
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throws IOException, InterruptedException {
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Path tempOutputFile = Files.createTempFile("output_", ".pdf");
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Path tempInputFile = null;
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byte[] pdfBytes;
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try {
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if (fileName.endsWith(".html")) {
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tempInputFile = Files.createTempFile("input_", ".html");
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Files.write(tempInputFile, fileBytes);
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} else {
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tempInputFile = unzipAndGetMainHtml(fileBytes);
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}
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List<String> command = new ArrayList<>();
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2024-01-09 23:39:21 +01:00
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if (!htmlFormatsInstalled) {
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command.add("weasyprint");
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} else {
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command.add("wkhtmltopdf");
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2024-01-10 01:33:07 +01:00
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command.add("--enable-local-file-access");
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2024-01-18 22:57:41 +01:00
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command.add("--load-error-handling");
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command.add("ignore");
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command.add("--load-media-error-handling");
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command.add("ignore");
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2024-01-28 18:36:17 +01:00
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command.add("--zoom");
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command.add(String.valueOf(request.getZoom()));
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// if custom zoom add zoom style direct to html
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// https://github.com/wkhtmltopdf/wkhtmltopdf/issues/4900
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if (request.getZoom() != 1.0) {
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String htmlContent = new String(Files.readAllBytes(tempInputFile));
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String zoomStyle = "<style>body { zoom: " + request.getZoom() + "; }</style>";
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// Check for <head> tag, add style tag to associated tag
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if (htmlContent.contains("<head>")) {
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htmlContent = htmlContent.replace("<head>", "<head>" + zoomStyle);
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} else if (htmlContent.contains("<html>")) {
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// If no <head> tag, but <html> tag exists
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htmlContent = htmlContent.replace("<html>", "<html>" + zoomStyle);
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} else {
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// If neither <head> nor <html> tags exist
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htmlContent = zoomStyle + htmlContent;
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}
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// rewrite new html to file
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Files.write(tempInputFile, htmlContent.getBytes(StandardCharsets.UTF_8));
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}
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if (request.getPageWidth() != null) {
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command.add("--page-width");
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command.add(request.getPageWidth() + "cm");
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}
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if (request.getPageHeight() != null) {
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command.add("--page-height");
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command.add(request.getPageHeight() + "cm");
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}
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if (request.getMarginTop() != null) {
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command.add("--margin-top");
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command.add(request.getMarginTop() + "mm");
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}
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// Repeat similar pattern for marginBottom, marginLeft, marginRight
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if ("Yes".equalsIgnoreCase(request.getPrintBackground())) {
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command.add("--background");
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} else {
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command.add("--no-background");
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}
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if ("Yes".equalsIgnoreCase(request.getDefaultHeader())) {
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command.add("--default-header");
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}
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if ("print".equalsIgnoreCase(request.getCssMediaType())) {
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command.add("--print-media-type");
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} else if ("screen".equalsIgnoreCase(request.getCssMediaType())) {
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command.add("--no-print-media-type");
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}
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2024-01-09 23:39:21 +01:00
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}
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2024-01-10 01:33:07 +01:00
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2023-08-01 01:03:13 +02:00
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command.add(tempInputFile.toString());
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command.add(tempOutputFile.toString());
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ProcessExecutorResult returnCode;
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if (fileName.endsWith(".zip")) {
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2024-01-09 23:39:21 +01:00
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if (htmlFormatsInstalled) {
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2024-01-10 01:33:07 +01:00
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// command.add(1, "--allow");
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// command.add(2, tempInputFile.getParent().toString());
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2024-01-09 23:39:21 +01:00
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}
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2023-08-01 01:03:13 +02:00
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returnCode =
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ProcessExecutor.getInstance(ProcessExecutor.Processes.WEASYPRINT)
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.runCommandWithOutputHandling(
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command, tempInputFile.getParent().toFile());
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2023-12-30 20:11:27 +01:00
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} else {
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2023-08-01 01:03:13 +02:00
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returnCode =
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ProcessExecutor.getInstance(ProcessExecutor.Processes.WEASYPRINT)
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.runCommandWithOutputHandling(command);
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}
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pdfBytes = Files.readAllBytes(tempOutputFile);
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2024-01-19 00:28:39 +01:00
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} catch (IOException e) {
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pdfBytes = Files.readAllBytes(tempOutputFile);
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if (pdfBytes.length < 1) {
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throw e;
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}
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2023-08-01 01:03:13 +02:00
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} finally {
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2024-01-19 00:28:39 +01:00
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2023-08-01 01:03:13 +02:00
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// Clean up temporary files
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Files.delete(tempOutputFile);
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Files.delete(tempInputFile);
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if (fileName.endsWith(".zip")) {
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GeneralUtils.deleteDirectory(tempInputFile.getParent());
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2023-12-30 20:11:27 +01:00
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}
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}
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2023-08-01 01:03:13 +02:00
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return pdfBytes;
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2023-12-30 20:11:27 +01:00
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}
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2023-08-01 01:03:13 +02:00
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private static Path unzipAndGetMainHtml(byte[] fileBytes) throws IOException {
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Path tempDirectory = Files.createTempDirectory("unzipped_");
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try (ZipInputStream zipIn = new ZipInputStream(new ByteArrayInputStream(fileBytes))) {
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ZipEntry entry = zipIn.getNextEntry();
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while (entry != null) {
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Path filePath = tempDirectory.resolve(entry.getName());
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if (entry.isDirectory()) {
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Files.createDirectories(filePath); // Explicitly create the directory structure
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2023-12-30 20:11:27 +01:00
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} else {
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2023-08-01 01:03:13 +02:00
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Files.createDirectories(
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filePath.getParent()); // Create parent directories if they don't exist
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Files.copy(zipIn, filePath);
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2023-12-30 20:11:27 +01:00
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}
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2023-08-01 01:03:13 +02:00
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zipIn.closeEntry();
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entry = zipIn.getNextEntry();
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2023-12-30 20:11:27 +01:00
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}
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}
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2023-08-01 01:03:13 +02:00
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// search for the main HTML file.
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try (Stream<Path> walk = Files.walk(tempDirectory)) {
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List<Path> htmlFiles =
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walk.filter(file -> file.toString().endsWith(".html"))
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.collect(Collectors.toList());
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2023-12-30 20:11:27 +01:00
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2023-08-01 01:03:13 +02:00
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if (htmlFiles.isEmpty()) {
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throw new IOException("No HTML files found in the unzipped directory.");
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2023-12-30 20:11:27 +01:00
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}
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2023-08-01 01:03:13 +02:00
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// Prioritize 'index.html' if it exists, otherwise use the first .html file
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for (Path htmlFile : htmlFiles) {
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if (htmlFile.getFileName().toString().equals("index.html")) {
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return htmlFile;
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2023-12-30 20:11:27 +01:00
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}
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}
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2023-08-01 01:03:13 +02:00
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return htmlFiles.get(0);
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}
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2023-12-30 20:11:27 +01:00
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}
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2024-01-09 23:39:21 +01:00
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public static byte[] convertBookTypeToPdf(byte[] bytes, String originalFilename)
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throws IOException, InterruptedException {
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if (originalFilename == null || originalFilename.lastIndexOf('.') == -1) {
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throw new IllegalArgumentException("Invalid original filename.");
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}
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String fileExtension = originalFilename.substring(originalFilename.lastIndexOf('.'));
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List<String> command = new ArrayList<>();
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Path tempOutputFile = Files.createTempFile("output_", ".pdf");
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Path tempInputFile = null;
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try {
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// Create temp file with appropriate extension
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tempInputFile = Files.createTempFile("input_", fileExtension);
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Files.write(tempInputFile, bytes);
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command.add("ebook-convert");
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command.add(tempInputFile.toString());
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command.add(tempOutputFile.toString());
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ProcessExecutorResult returnCode =
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ProcessExecutor.getInstance(ProcessExecutor.Processes.CALIBRE)
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.runCommandWithOutputHandling(command);
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return Files.readAllBytes(tempOutputFile);
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} finally {
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// Clean up temporary files
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if (tempInputFile != null) {
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Files.deleteIfExists(tempInputFile);
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}
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Files.deleteIfExists(tempOutputFile);
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}
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}
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2023-08-01 01:03:13 +02:00
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}
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