WIP: Fixes issue - needs refactor
This commit is contained in:
dkaitantzidis
parent
9652f59ae9
commit
fb18d0d04d
1 changed files with 85 additions and 76 deletions
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@ -1,7 +1,6 @@
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package stirling.software.SPDF.controller.api;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.*;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.nio.file.attribute.BasicFileAttributes;
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@ -10,10 +9,15 @@ import java.util.Arrays;
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import java.util.Comparator;
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import java.util.List;
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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.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.http.HttpHeaders;
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import org.springframework.http.HttpStatus;
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import org.springframework.http.MediaType;
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import org.springframework.http.ResponseEntity;
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import org.springframework.web.bind.annotation.ModelAttribute;
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import org.springframework.web.bind.annotation.PostMapping;
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@ -34,82 +38,87 @@ public class MergeController {
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private static final Logger logger = LoggerFactory.getLogger(MergeController.class);
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private PDDocument mergeDocuments(List<PDDocument> documents) throws IOException {
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PDDocument mergedDoc = new PDDocument();
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for (PDDocument doc : documents) {
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for (PDPage page : doc.getPages()) {
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mergedDoc.addPage(page);
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}
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}
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return mergedDoc;
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}
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private Comparator<MultipartFile> getSortComparator(String sortType) {
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switch (sortType) {
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case "byFileName":
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return Comparator.comparing(MultipartFile::getOriginalFilename);
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case "byDateModified":
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return (file1, file2) -> {
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try {
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BasicFileAttributes attr1 = Files.readAttributes(Paths.get(file1.getOriginalFilename()), BasicFileAttributes.class);
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BasicFileAttributes attr2 = Files.readAttributes(Paths.get(file2.getOriginalFilename()), BasicFileAttributes.class);
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return attr1.lastModifiedTime().compareTo(attr2.lastModifiedTime());
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} catch (IOException e) {
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return 0; // If there's an error, treat them as equal
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}
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};
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case "byDateCreated":
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return (file1, file2) -> {
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try {
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BasicFileAttributes attr1 = Files.readAttributes(Paths.get(file1.getOriginalFilename()), BasicFileAttributes.class);
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BasicFileAttributes attr2 = Files.readAttributes(Paths.get(file2.getOriginalFilename()), BasicFileAttributes.class);
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return attr1.creationTime().compareTo(attr2.creationTime());
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} catch (IOException e) {
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return 0; // If there's an error, treat them as equal
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}
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};
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case "byPDFTitle":
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return (file1, file2) -> {
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try (PDDocument doc1 = PDDocument.load(file1.getInputStream());
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PDDocument doc2 = PDDocument.load(file2.getInputStream())) {
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String title1 = doc1.getDocumentInformation().getTitle();
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String title2 = doc2.getDocumentInformation().getTitle();
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return title1.compareTo(title2);
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} catch (IOException e) {
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return 0;
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}
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};
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case "orderProvided":
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default:
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return (file1, file2) -> 0; // Default is the order provided
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}
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}
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@PostMapping(consumes = "multipart/form-data", value = "/merge-pdfs")
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@Operation(summary = "Merge multiple PDF files into one",
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description = "This endpoint merges multiple PDF files into a single PDF file. The merged file will contain all pages from the input files in the order they were provided. Input:PDF Output:PDF Type:MISO")
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public ResponseEntity<byte[]> mergePdfs(@ModelAttribute MergePdfsRequest form) throws IOException {
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MultipartFile[] files = form.getFileInput();
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Arrays.sort(files, getSortComparator(form.getSortType()));
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List<PDDocument> documents = new ArrayList<>();
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for (MultipartFile file : files) {
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try (InputStream is = file.getInputStream()) {
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documents.add(PDDocument.load(is));
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}
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}
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try (PDDocument mergedDoc = mergeDocuments(documents)) {
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ResponseEntity<byte[]> response = WebResponseUtils.pdfDocToWebResponse(mergedDoc, files[0].getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_merged.pdf");
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return response;
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} finally {
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private PDDocument mergeDocuments(List<PDDocument> documents) throws IOException {
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PDDocument mergedDoc = new PDDocument();
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for (PDDocument doc : documents) {
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if (doc != null) {
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doc.close();
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for (PDPage page : doc.getPages()) {
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mergedDoc.addPage(page);
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}
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}
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return mergedDoc;
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}
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private Comparator<MultipartFile> getSortComparator(String sortType) {
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switch (sortType) {
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case "byFileName":
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return Comparator.comparing(MultipartFile::getOriginalFilename);
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case "byDateModified":
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return (file1, file2) -> {
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try {
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BasicFileAttributes attr1 = Files.readAttributes(Paths.get(file1.getOriginalFilename()), BasicFileAttributes.class);
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BasicFileAttributes attr2 = Files.readAttributes(Paths.get(file2.getOriginalFilename()), BasicFileAttributes.class);
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return attr1.lastModifiedTime().compareTo(attr2.lastModifiedTime());
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} catch (IOException e) {
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return 0; // If there's an error, treat them as equal
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}
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};
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case "byDateCreated":
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return (file1, file2) -> {
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try {
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BasicFileAttributes attr1 = Files.readAttributes(Paths.get(file1.getOriginalFilename()), BasicFileAttributes.class);
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BasicFileAttributes attr2 = Files.readAttributes(Paths.get(file2.getOriginalFilename()), BasicFileAttributes.class);
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return attr1.creationTime().compareTo(attr2.creationTime());
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} catch (IOException e) {
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return 0; // If there's an error, treat them as equal
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}
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};
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case "byPDFTitle":
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return (file1, file2) -> {
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try (PDDocument doc1 = PDDocument.load(file1.getInputStream());
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PDDocument doc2 = PDDocument.load(file2.getInputStream())) {
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String title1 = doc1.getDocumentInformation().getTitle();
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String title2 = doc2.getDocumentInformation().getTitle();
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return title1.compareTo(title2);
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} catch (IOException e) {
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return 0;
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}
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};
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case "orderProvided":
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default:
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return (file1, file2) -> 0; // Default is the order provided
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}
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}
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@PostMapping(consumes = "multipart/form-data", value = "/merge-pdfs")
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@Operation(summary = "Merge multiple PDF files into one",
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description = "This endpoint merges multiple PDF files into a single PDF file. The merged file will contain all pages from the input files in the order they were provided. Input:PDF Output:PDF Type:MISO")
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public ResponseEntity<byte[]> mergePdfs(@ModelAttribute MergePdfsRequest form) throws IOException {
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try {
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MultipartFile[] files = form.getFileInput();
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Arrays.sort(files, getSortComparator(form.getSortType()));
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PDFMergerUtility mergedDoc = new PDFMergerUtility();
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ByteArrayOutputStream docOutputstream = new ByteArrayOutputStream();
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for (MultipartFile file : files) {
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mergedDoc.addSource(new ByteArrayInputStream(file.getBytes()));
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}
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mergedDoc.setDestinationFileName(files[0].getOriginalFilename().replaceFirst("[.][^.]+$", ""));
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mergedDoc.setDestinationStream(docOutputstream);
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mergedDoc.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly());
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HttpHeaders headers = new HttpHeaders();
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headers.setContentType(MediaType.APPLICATION_PDF);
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// Here you have to set the actual filename of your pdf
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headers.setContentDispositionFormData(mergedDoc.getDestinationFileName(), mergedDoc.getDestinationFileName());
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headers.setCacheControl("must-revalidate, post-check=0, pre-check=0");
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return new ResponseEntity<>(docOutputstream.toByteArray(), headers, HttpStatus.OK);
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} catch (Exception ex) {
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logger.error("Error in merge pdf process", ex);
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throw ex;
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}
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}
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}
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}
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