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#55: Refactoring
This commit is contained in:
jendib
parent
eb61b06784
commit
0591f8a39f
@ -1,47 +1,27 @@
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package com.sismics.docs.core.util;
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import java.awt.image.BufferedImage;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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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.List;
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import javax.crypto.Cipher;
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import javax.crypto.CipherInputStream;
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import javax.crypto.CipherOutputStream;
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import javax.imageio.ImageIO;
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import org.apache.pdfbox.io.MemoryUsageSetting;
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import org.apache.pdfbox.multipdf.PDFMergerUtility;
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import org.apache.pdfbox.pdmodel.PDDocument;
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import org.apache.pdfbox.pdmodel.PDPage;
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import org.apache.pdfbox.pdmodel.PDPageContentStream;
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import org.apache.pdfbox.pdmodel.common.PDRectangle;
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import org.apache.pdfbox.pdmodel.graphics.image.JPEGFactory;
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import org.apache.pdfbox.pdmodel.graphics.image.LosslessFactory;
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import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
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import org.apache.pdfbox.rendering.PDFRenderer;
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import org.apache.pdfbox.text.PDFTextStripper;
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import org.apache.poi.xwpf.usermodel.XWPFDocument;
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import org.imgscalr.Scalr;
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import org.imgscalr.Scalr.Method;
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import org.imgscalr.Scalr.Mode;
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import org.odftoolkit.odfdom.converter.pdf.PdfConverter;
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import org.odftoolkit.odfdom.converter.pdf.PdfOptions;
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import org.odftoolkit.odfdom.doc.OdfTextDocument;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.google.common.io.Closer;
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import com.sismics.docs.core.model.jpa.Document;
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import com.sismics.docs.core.model.jpa.File;
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import com.sismics.tess4j.Tesseract;
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import com.sismics.util.ImageUtil;
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import com.sismics.util.mime.MimeType;
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/**
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* File entity utilities.
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@ -69,7 +49,7 @@ public class FileUtil {
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if (ImageUtil.isImage(file.getMimeType())) {
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content = ocrFile(inputStream, document);
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} else if (pdfInputStream != null) {
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content = extractPdf(pdfInputStream);
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content = PdfUtil.extractPdf(pdfInputStream);
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}
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return content;
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@ -109,99 +89,6 @@ public class FileUtil {
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return content;
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}
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/**
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* Extract text from a PDF.
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*
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* @param inputStream Unencrypted input stream
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* @return Content extracted
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*/
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private static String extractPdf(InputStream inputStream) {
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String content = null;
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PDDocument pdfDocument = null;
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try {
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PDFTextStripper stripper = new PDFTextStripper();
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pdfDocument = PDDocument.load(inputStream);
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content = stripper.getText(pdfDocument);
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} catch (IOException e) {
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log.error("Error while extracting text from the PDF", e);
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} finally {
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if (pdfDocument != null) {
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try {
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pdfDocument.close();
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} catch (IOException e) {
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// NOP
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}
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}
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}
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return content;
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}
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/**
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* Convert a file to PDF if necessary.
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*
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* @param file File
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* @param inputStream InputStream
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* @param reset Reset the stream after usage
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* @return PDF input stream
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* @throws Exception
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*/
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public static InputStream convertToPdf(File file, InputStream inputStream, boolean reset) throws Exception {
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if (file.getMimeType().equals(MimeType.APPLICATION_PDF)) {
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// It's already PDF, just return the input
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return inputStream;
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}
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if (file.getMimeType().equals(MimeType.OFFICE_DOCUMENT)) {
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return convertOfficeDocument(inputStream, reset);
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}
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if (file.getMimeType().equals(MimeType.OPEN_DOCUMENT_TEXT)) {
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return convertOpenDocumentText(inputStream, reset);
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}
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// PDF conversion not necessary/possible
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return null;
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}
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/**
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* Convert an open document text file to PDF.
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*
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* @param inputStream Unencrypted input stream
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* @param reset Reset the stream after usage
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* @return PDF input stream
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* @throws Exception
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*/
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private static InputStream convertOpenDocumentText(InputStream inputStream, boolean reset) throws Exception {
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ByteArrayOutputStream pdfOutputStream = new ByteArrayOutputStream();
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OdfTextDocument document = OdfTextDocument.loadDocument(inputStream);
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PdfOptions options = PdfOptions.create();
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PdfConverter.getInstance().convert(document, pdfOutputStream, options);
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if (reset) {
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inputStream.reset();
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}
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return new ByteArrayInputStream(pdfOutputStream.toByteArray());
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}
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/**
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* Convert an Office document to PDF.
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*
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* @param inputStream Unencrypted input stream
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* @param reset Reset the stream after usage
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* @return PDF input stream
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* @throws Exception
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*/
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private static InputStream convertOfficeDocument(InputStream inputStream, boolean reset) throws Exception {
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ByteArrayOutputStream pdfOutputStream = new ByteArrayOutputStream();
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XWPFDocument document = new XWPFDocument(inputStream);
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org.apache.poi.xwpf.converter.pdf.PdfOptions options = org.apache.poi.xwpf.converter.pdf.PdfOptions.create();
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org.apache.poi.xwpf.converter.pdf.PdfConverter.getInstance().convert(document, pdfOutputStream, options);
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if (reset) {
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inputStream.reset();
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}
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return new ByteArrayInputStream(pdfOutputStream.toByteArray());
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}
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/**
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* Save a file on the storage filesystem.
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*
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@ -237,15 +124,8 @@ public class FileUtil {
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inputStream.reset();
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} else if(pdfInputStream != null) {
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// Generate preview from the first page of the PDF
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PDDocument pdfDocument = null;
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try {
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pdfDocument = PDDocument.load(pdfInputStream);
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PDFRenderer renderer = new PDFRenderer(pdfDocument);
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image = renderer.renderImage(0);
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image = PdfUtil.renderFirstPage(pdfInputStream);
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pdfInputStream.reset();
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} finally {
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pdfDocument.close();
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}
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}
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if (image != null) {
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@ -289,94 +169,4 @@ public class FileUtil {
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Files.delete(thumbnailFile);
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}
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}
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/**
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* Convert a document and its files to a merged PDF file.
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*
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* @param fileList List of files
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* @param fitImageToPage Fill images to the page
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* @param margin Margins in millimeters
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* @return PDF input stream
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* @throws IOException
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*/
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public static InputStream convertToPdf(List<File> fileList, boolean fitImageToPage, int margin) throws Exception {
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// TODO PDF Export: Option to add a front page with:
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// document title, document description, creator, date created, language,
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// list of all files (and information if it is in this document or not)
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// TODO PDF Export: Option to add the comments
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// Create a blank PDF
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Closer closer = Closer.create();
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MemoryUsageSetting memUsageSettings = MemoryUsageSetting.setupMixed(1000000); // 1MB max memory usage
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memUsageSettings.setTempDir(new java.io.File(System.getProperty("java.io.tmpdir"))); // To OS temp
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float mmPerInch = 1 / (10 * 2.54f) * 72f;
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try (PDDocument doc = new PDDocument(memUsageSettings)) {
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// Add files
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for (File file : fileList) {
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Path storedFile = DirectoryUtil.getStorageDirectory().resolve(file.getId());
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try (InputStream storedFileInputStream = file.getPrivateKey() == null ? // Try to decrypt the file if we have a private key available
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Files.newInputStream(storedFile) : EncryptionUtil.decryptInputStream(Files.newInputStream(storedFile), file.getPrivateKey())) {
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if (ImageUtil.isImage(file.getMimeType())) {
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PDPage page = new PDPage(PDRectangle.A4); // Images into A4 pages
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try (PDPageContentStream contentStream = new PDPageContentStream(doc, page)) {
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// Read the image using the correct handler. PDFBox can't do it because it relies wrongly on file extension
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PDImageXObject pdImage = null;
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if (file.getMimeType().equals(MimeType.IMAGE_JPEG)) {
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pdImage = JPEGFactory.createFromStream(doc, storedFileInputStream);
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} else if (file.getMimeType().equals(MimeType.IMAGE_GIF) || file.getMimeType().equals(MimeType.IMAGE_PNG)) {
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BufferedImage bim = ImageIO.read(storedFileInputStream);
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pdImage = LosslessFactory.createFromImage(doc, bim);
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}
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if (fitImageToPage) {
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// Fill the page with the image
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float widthAvailable = page.getMediaBox().getWidth() - 2 * margin * mmPerInch;
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float heightAvailable = page.getMediaBox().getHeight() - 2 * margin * mmPerInch;
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// Compare page format and image format
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if (widthAvailable / heightAvailable < (float) pdImage.getWidth() / (float) pdImage.getHeight()) {
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float imageHeight = widthAvailable / pdImage.getWidth() * pdImage.getHeight();
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contentStream.drawImage(pdImage, margin * mmPerInch, heightAvailable + margin * mmPerInch - imageHeight,
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widthAvailable, imageHeight);
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} else {
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float imageWidth = heightAvailable / pdImage.getHeight() * pdImage.getWidth();
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contentStream.drawImage(pdImage, margin * mmPerInch, margin * mmPerInch,
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imageWidth, heightAvailable);
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}
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} else {
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// Draw the image as is
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contentStream.drawImage(pdImage, margin * mmPerInch,
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page.getMediaBox().getHeight() - pdImage.getHeight() - margin * mmPerInch);
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}
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}
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doc.addPage(page);
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} else {
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// Try to convert the file to PDF
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InputStream pdfInputStream = convertToPdf(file, storedFileInputStream, false);
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if (pdfInputStream != null) {
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// This file is convertible to PDF, just add it to the end
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try {
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PDDocument mergeDoc = PDDocument.load(pdfInputStream, memUsageSettings);
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closer.register(mergeDoc);
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PDFMergerUtility pdfMergerUtility = new PDFMergerUtility();
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pdfMergerUtility.appendDocument(doc, mergeDoc);
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} finally {
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pdfInputStream.close();
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}
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}
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// All other non-PDF-convertible files are ignored
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}
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}
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}
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// Save to a temporary file
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try (TemporaryFileStream temporaryFileStream = new TemporaryFileStream()) {
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doc.save(temporaryFileStream.openWriteStream());
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closer.close(); // Close all remaining opened PDF
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return temporaryFileStream.openReadStream();
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}
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}
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}
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}
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245
docs-core/src/main/java/com/sismics/docs/core/util/PdfUtil.java
Normal file
245
docs-core/src/main/java/com/sismics/docs/core/util/PdfUtil.java
Normal file
@ -0,0 +1,245 @@
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package com.sismics.docs.core.util;
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import java.awt.image.BufferedImage;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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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.List;
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import javax.imageio.ImageIO;
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import org.apache.pdfbox.io.MemoryUsageSetting;
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import org.apache.pdfbox.multipdf.PDFMergerUtility;
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import org.apache.pdfbox.pdmodel.PDDocument;
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import org.apache.pdfbox.pdmodel.PDPage;
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import org.apache.pdfbox.pdmodel.PDPageContentStream;
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import org.apache.pdfbox.pdmodel.common.PDRectangle;
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import org.apache.pdfbox.pdmodel.graphics.image.JPEGFactory;
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import org.apache.pdfbox.pdmodel.graphics.image.LosslessFactory;
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import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
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import org.apache.pdfbox.rendering.PDFRenderer;
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import org.apache.pdfbox.text.PDFTextStripper;
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import org.apache.poi.xwpf.usermodel.XWPFDocument;
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import org.odftoolkit.odfdom.converter.pdf.PdfConverter;
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import org.odftoolkit.odfdom.converter.pdf.PdfOptions;
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import org.odftoolkit.odfdom.doc.OdfTextDocument;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.google.common.io.Closer;
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import com.sismics.docs.core.model.jpa.File;
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import com.sismics.util.ImageUtil;
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import com.sismics.util.mime.MimeType;
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/**
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* PDF utilities.
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*
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* @author bgamard
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*/
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public class PdfUtil {
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/**
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* Logger.
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*/
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private static final Logger log = LoggerFactory.getLogger(PdfUtil.class);
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/**
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* Extract text from a PDF.
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*
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* @param inputStream Unencrypted input stream
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* @return Content extracted
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*/
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public static String extractPdf(InputStream inputStream) {
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String content = null;
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PDDocument pdfDocument = null;
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try {
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PDFTextStripper stripper = new PDFTextStripper();
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pdfDocument = PDDocument.load(inputStream);
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content = stripper.getText(pdfDocument);
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} catch (IOException e) {
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log.error("Error while extracting text from the PDF", e);
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} finally {
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if (pdfDocument != null) {
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try {
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pdfDocument.close();
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} catch (IOException e) {
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// NOP
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}
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}
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}
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return content;
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}
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/**
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* Convert a file to PDF if necessary.
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*
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* @param file File
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* @param inputStream InputStream
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* @param reset Reset the stream after usage
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* @return PDF input stream
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* @throws Exception
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*/
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public static InputStream convertToPdf(File file, InputStream inputStream, boolean reset) throws Exception {
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if (file.getMimeType().equals(MimeType.APPLICATION_PDF)) {
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// It's already PDF, just return the input
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return inputStream;
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}
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if (file.getMimeType().equals(MimeType.OFFICE_DOCUMENT)) {
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return convertOfficeDocument(inputStream, reset);
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}
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if (file.getMimeType().equals(MimeType.OPEN_DOCUMENT_TEXT)) {
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return convertOpenDocumentText(inputStream, reset);
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}
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// PDF conversion not necessary/possible
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return null;
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}
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/**
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* Convert an open document text file to PDF.
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*
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* @param inputStream Unencrypted input stream
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* @param reset Reset the stream after usage
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* @return PDF input stream
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* @throws Exception
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*/
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private static InputStream convertOpenDocumentText(InputStream inputStream, boolean reset) throws Exception {
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ByteArrayOutputStream pdfOutputStream = new ByteArrayOutputStream();
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OdfTextDocument document = OdfTextDocument.loadDocument(inputStream);
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PdfOptions options = PdfOptions.create();
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PdfConverter.getInstance().convert(document, pdfOutputStream, options);
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if (reset) {
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inputStream.reset();
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}
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return new ByteArrayInputStream(pdfOutputStream.toByteArray());
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}
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/**
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* Convert an Office document to PDF.
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*
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* @param inputStream Unencrypted input stream
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* @param reset Reset the stream after usage
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* @return PDF input stream
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* @throws Exception
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*/
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private static InputStream convertOfficeDocument(InputStream inputStream, boolean reset) throws Exception {
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ByteArrayOutputStream pdfOutputStream = new ByteArrayOutputStream();
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XWPFDocument document = new XWPFDocument(inputStream);
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org.apache.poi.xwpf.converter.pdf.PdfOptions options = org.apache.poi.xwpf.converter.pdf.PdfOptions.create();
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org.apache.poi.xwpf.converter.pdf.PdfConverter.getInstance().convert(document, pdfOutputStream, options);
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if (reset) {
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inputStream.reset();
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}
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return new ByteArrayInputStream(pdfOutputStream.toByteArray());
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}
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/**
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* Convert a document and its files to a merged PDF file.
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*
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* @param fileList List of files
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* @param fitImageToPage Fit images to the page
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* @param margin Margins in millimeters
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* @return PDF input stream
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* @throws IOException
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*/
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public static InputStream convertToPdf(List<File> fileList, boolean fitImageToPage, int margin) throws Exception {
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// TODO PDF Export: Option to add a front page with:
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// document title, document description, creator, date created, language,
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// list of all files (and information if it is in this document or not)
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// TODO PDF Export: Option to add the comments
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// Create a blank PDF
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Closer closer = Closer.create();
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MemoryUsageSetting memUsageSettings = MemoryUsageSetting.setupMixed(1000000); // 1MB max memory usage
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memUsageSettings.setTempDir(new java.io.File(System.getProperty("java.io.tmpdir"))); // To OS temp
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float mmPerInch = 1 / (10 * 2.54f) * 72f;
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try (PDDocument doc = new PDDocument(memUsageSettings)) {
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// Add files
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for (File file : fileList) {
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Path storedFile = DirectoryUtil.getStorageDirectory().resolve(file.getId());
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try (InputStream storedFileInputStream = file.getPrivateKey() == null ? // Try to decrypt the file if we have a private key available
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Files.newInputStream(storedFile) : EncryptionUtil.decryptInputStream(Files.newInputStream(storedFile), file.getPrivateKey())) {
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if (ImageUtil.isImage(file.getMimeType())) {
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PDPage page = new PDPage(PDRectangle.A4); // Images into A4 pages
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try (PDPageContentStream contentStream = new PDPageContentStream(doc, page)) {
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// Read the image using the correct handler. PDFBox can't do it because it relies wrongly on file extension
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PDImageXObject pdImage = null;
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if (file.getMimeType().equals(MimeType.IMAGE_JPEG)) {
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pdImage = JPEGFactory.createFromStream(doc, storedFileInputStream);
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} else if (file.getMimeType().equals(MimeType.IMAGE_GIF) || file.getMimeType().equals(MimeType.IMAGE_PNG)) {
|
||||
BufferedImage bim = ImageIO.read(storedFileInputStream);
|
||||
pdImage = LosslessFactory.createFromImage(doc, bim);
|
||||
}
|
||||
|
||||
// Do we want to fill the page with the image?
|
||||
if (fitImageToPage) {
|
||||
// Fill the page with the image
|
||||
float widthAvailable = page.getMediaBox().getWidth() - 2 * margin * mmPerInch;
|
||||
float heightAvailable = page.getMediaBox().getHeight() - 2 * margin * mmPerInch;
|
||||
|
||||
// Compare page format and image format
|
||||
if (widthAvailable / heightAvailable < (float) pdImage.getWidth() / (float) pdImage.getHeight()) {
|
||||
float imageHeight = widthAvailable / pdImage.getWidth() * pdImage.getHeight();
|
||||
contentStream.drawImage(pdImage, margin * mmPerInch, heightAvailable + margin * mmPerInch - imageHeight,
|
||||
widthAvailable, imageHeight);
|
||||
} else {
|
||||
float imageWidth = heightAvailable / pdImage.getHeight() * pdImage.getWidth();
|
||||
contentStream.drawImage(pdImage, margin * mmPerInch, margin * mmPerInch,
|
||||
imageWidth, heightAvailable);
|
||||
}
|
||||
} else {
|
||||
// Draw the image as is
|
||||
contentStream.drawImage(pdImage, margin * mmPerInch,
|
||||
page.getMediaBox().getHeight() - pdImage.getHeight() - margin * mmPerInch);
|
||||
}
|
||||
}
|
||||
doc.addPage(page);
|
||||
} else {
|
||||
// Try to convert the file to PDF
|
||||
InputStream pdfInputStream = convertToPdf(file, storedFileInputStream, false);
|
||||
if (pdfInputStream != null) {
|
||||
// This file is convertible to PDF, just add it to the end
|
||||
try {
|
||||
PDDocument mergeDoc = PDDocument.load(pdfInputStream, memUsageSettings);
|
||||
closer.register(mergeDoc);
|
||||
PDFMergerUtility pdfMergerUtility = new PDFMergerUtility();
|
||||
pdfMergerUtility.appendDocument(doc, mergeDoc);
|
||||
} finally {
|
||||
pdfInputStream.close();
|
||||
}
|
||||
}
|
||||
|
||||
// All other non-PDF-convertible files are ignored
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Save to a temporary file
|
||||
try (TemporaryFileStream temporaryFileStream = new TemporaryFileStream()) {
|
||||
doc.save(temporaryFileStream.openWriteStream());
|
||||
closer.close(); // Close all remaining opened PDF
|
||||
return temporaryFileStream.openReadStream();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Render the first page of a PDF.
|
||||
*
|
||||
* @param inputStream PDF document
|
||||
* @return Render of the first page
|
||||
* @throws IOException
|
||||
*/
|
||||
public static BufferedImage renderFirstPage(InputStream inputStream) throws IOException {
|
||||
try (PDDocument pdfDocument = PDDocument.load(inputStream)) {
|
||||
PDFRenderer renderer = new PDFRenderer(pdfDocument);
|
||||
return renderer.renderImage(0);
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -4,8 +4,6 @@ import java.io.InputStream;
|
||||
import java.nio.file.Files;
|
||||
import java.nio.file.StandardCopyOption;
|
||||
|
||||
import junit.framework.Assert;
|
||||
|
||||
import org.junit.Test;
|
||||
|
||||
import com.google.common.collect.Lists;
|
||||
@ -13,6 +11,8 @@ import com.google.common.io.Resources;
|
||||
import com.sismics.docs.core.model.jpa.File;
|
||||
import com.sismics.util.mime.MimeType;
|
||||
|
||||
import junit.framework.Assert;
|
||||
|
||||
/**
|
||||
* Test of the file entity utilities.
|
||||
*
|
||||
@ -24,7 +24,7 @@ public class TestFileUtil {
|
||||
try (InputStream inputStream = Resources.getResource("file/document.odt").openStream()) {
|
||||
File file = new File();
|
||||
file.setMimeType(MimeType.OPEN_DOCUMENT_TEXT);
|
||||
try (InputStream pdfInputStream = FileUtil.convertToPdf(file, inputStream, false)) {
|
||||
try (InputStream pdfInputStream = PdfUtil.convertToPdf(file, inputStream, false)) {
|
||||
String content = FileUtil.extractContent(null, file, inputStream, pdfInputStream);
|
||||
Assert.assertTrue(content.contains("Lorem ipsum dolor sit amen."));
|
||||
}
|
||||
@ -36,7 +36,7 @@ public class TestFileUtil {
|
||||
try (InputStream inputStream = Resources.getResource("file/document.docx").openStream()) {
|
||||
File file = new File();
|
||||
file.setMimeType(MimeType.OFFICE_DOCUMENT);
|
||||
try (InputStream pdfInputStream = FileUtil.convertToPdf(file, inputStream, false)) {
|
||||
try (InputStream pdfInputStream = PdfUtil.convertToPdf(file, inputStream, false)) {
|
||||
String content = FileUtil.extractContent(null, file, inputStream, pdfInputStream);
|
||||
Assert.assertTrue(content.contains("Lorem ipsum dolor sit amen."));
|
||||
}
|
||||
@ -81,7 +81,7 @@ public class TestFileUtil {
|
||||
file4.setId("document_odt");
|
||||
file4.setMimeType(MimeType.OPEN_DOCUMENT_TEXT);
|
||||
|
||||
FileUtil.convertToPdf(Lists.newArrayList(file0, file1, file2, file3, file4), true, 10).close();
|
||||
PdfUtil.convertToPdf(Lists.newArrayList(file0, file1, file2, file3, file4), true, 10).close();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -53,6 +53,7 @@ import com.sismics.docs.core.model.jpa.User;
|
||||
import com.sismics.docs.core.util.DirectoryUtil;
|
||||
import com.sismics.docs.core.util.EncryptionUtil;
|
||||
import com.sismics.docs.core.util.FileUtil;
|
||||
import com.sismics.docs.core.util.PdfUtil;
|
||||
import com.sismics.rest.exception.ClientException;
|
||||
import com.sismics.rest.exception.ForbiddenClientException;
|
||||
import com.sismics.rest.exception.ServerException;
|
||||
@ -150,7 +151,7 @@ public class FileResource extends BaseResource {
|
||||
file.setMimeType(MimeTypeUtil.guessOpenDocumentFormat(file, fileInputStream));
|
||||
|
||||
// Convert to PDF if necessary (for thumbnail and text extraction)
|
||||
InputStream pdfIntputStream = FileUtil.convertToPdf(file, fileInputStream, true);
|
||||
InputStream pdfIntputStream = PdfUtil.convertToPdf(file, fileInputStream, true);
|
||||
|
||||
// Save the file
|
||||
FileUtil.save(fileInputStream, pdfIntputStream, file, user.getPrivateKey());
|
||||
|
||||
Loading…
Reference in New Issue
Block a user