Mirrors/Stirling-PDF
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Merge branch 'main' into main

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Anthony Stirling 2023-12-25 22:24:30 +00:00 committed by GitHub
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src/main/java/stirling/software/SPDF/controller/api/MergeController.java
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@ -1,15 +1,9 @@
package stirling.software.SPDF.controller.api; package stirling.software.SPDF.controller.api;
import java.io.IOException; import io.swagger.v3.oas.annotations.Operation;
import java.io.InputStream; import io.swagger.v3.oas.annotations.tags.Tag;
import java.nio.file.Files; import org.apache.pdfbox.io.MemoryUsageSetting;
import java.nio.file.Paths; import org.apache.pdfbox.multipdf.PDFMergerUtility;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage; import org.apache.pdfbox.pdmodel.PDPage;
import org.slf4j.Logger; import org.slf4j.Logger;
@ -20,12 +14,19 @@ import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController; import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartFile;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import stirling.software.SPDF.model.api.general.MergePdfsRequest; import stirling.software.SPDF.model.api.general.MergePdfsRequest;
import stirling.software.SPDF.utils.WebResponseUtils; import stirling.software.SPDF.utils.WebResponseUtils;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
@RestController @RestController
@RequestMapping("/api/v1/general") @RequestMapping("/api/v1/general")
@Tag(name = "General", description = "General APIs") @Tag(name = "General", description = "General APIs")
@ -34,7 +35,7 @@ public class MergeController {
private static final Logger logger = LoggerFactory.getLogger(MergeController.class); private static final Logger logger = LoggerFactory.getLogger(MergeController.class);
private PDDocument mergeDocuments(List<PDDocument> documents) throws IOException { private PDDocument mergeDocuments(List<PDDocument> documents) throws IOException {
PDDocument mergedDoc = new PDDocument(); PDDocument mergedDoc = new PDDocument();
for (PDDocument doc : documents) { for (PDDocument doc : documents) {
for (PDPage page : doc.getPages()) { for (PDPage page : doc.getPages()) {
@ -42,9 +43,9 @@ private PDDocument mergeDocuments(List<PDDocument> documents) throws IOException
} }
} }
return mergedDoc; return mergedDoc;
} }
private Comparator<MultipartFile> getSortComparator(String sortType) { private Comparator<MultipartFile> getSortComparator(String sortType) {
switch (sortType) { switch (sortType) {
case "byFileName": case "byFileName":
return Comparator.comparing(MultipartFile::getOriginalFilename); return Comparator.comparing(MultipartFile::getOriginalFilename);
@ -83,33 +84,31 @@ private Comparator<MultipartFile> getSortComparator(String sortType) {
default: default:
return (file1, file2) -> 0; // Default is the order provided return (file1, file2) -> 0; // Default is the order provided
} }
} }
@PostMapping(consumes = "multipart/form-data", value = "/merge-pdfs") @PostMapping(consumes = "multipart/form-data", value = "/merge-pdfs")
@Operation(summary = "Merge multiple PDF files into one", @Operation(summary = "Merge multiple PDF files into one",
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") 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")
public ResponseEntity<byte[]> mergePdfs(@ModelAttribute MergePdfsRequest form) throws IOException { public ResponseEntity<byte[]> mergePdfs(@ModelAttribute MergePdfsRequest form) throws IOException {
try {
MultipartFile[] files = form.getFileInput(); MultipartFile[] files = form.getFileInput();
Arrays.sort(files, getSortComparator(form.getSortType())); Arrays.sort(files, getSortComparator(form.getSortType()));
List<PDDocument> documents = new ArrayList<>(); PDFMergerUtility mergedDoc = new PDFMergerUtility();
ByteArrayOutputStream docOutputstream = new ByteArrayOutputStream();
for (MultipartFile file : files) { for (MultipartFile file : files) {
try (InputStream is = file.getInputStream()) { mergedDoc.addSource(new ByteArrayInputStream(file.getBytes()));
documents.add(PDDocument.load(is));
}
} }
try (PDDocument mergedDoc = mergeDocuments(documents)) { mergedDoc.setDestinationFileName(files[0].getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_merged.pdf");
ResponseEntity<byte[]> response = WebResponseUtils.pdfDocToWebResponse(mergedDoc, files[0].getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_merged.pdf"); mergedDoc.setDestinationStream(docOutputstream);
return response; mergedDoc.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly());
} finally {
for (PDDocument doc : documents) { return WebResponseUtils.bytesToWebResponse(docOutputstream.toByteArray(), mergedDoc.getDestinationFileName());
if (doc != null) { } catch (Exception ex) {
doc.close(); logger.error("Error in merge pdf process", ex);
} throw ex;
} }
} }
} }
}