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
commit 8938e86223
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1 changed files with 86 additions and 87 deletions
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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;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import org.apache.pdfbox.io.MemoryUsageSetting;
import org.apache.pdfbox.multipdf.PDFMergerUtility;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
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.RestController;
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.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
@RequestMapping("/api/v1/general")
@Tag(name = "General", description = "General APIs")
@ -89,27 +90,25 @@ private Comparator<MultipartFile> getSortComparator(String sortType) {
@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")
public ResponseEntity<byte[]> mergePdfs(@ModelAttribute MergePdfsRequest form) throws IOException {
try {
MultipartFile[] files = form.getFileInput();
Arrays.sort(files, getSortComparator(form.getSortType()));
List<PDDocument> documents = new ArrayList<>();
PDFMergerUtility mergedDoc = new PDFMergerUtility();
ByteArrayOutputStream docOutputstream = new ByteArrayOutputStream();
for (MultipartFile file : files) {
try (InputStream is = file.getInputStream()) {
documents.add(PDDocument.load(is));
}
mergedDoc.addSource(new ByteArrayInputStream(file.getBytes()));
}
try (PDDocument mergedDoc = mergeDocuments(documents)) {
ResponseEntity<byte[]> response = WebResponseUtils.pdfDocToWebResponse(mergedDoc, files[0].getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_merged.pdf");
return response;
} finally {
for (PDDocument doc : documents) {
if (doc != null) {
doc.close();
}
}
}
}
mergedDoc.setDestinationFileName(files[0].getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_merged.pdf");
mergedDoc.setDestinationStream(docOutputstream);
mergedDoc.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly());
return WebResponseUtils.bytesToWebResponse(docOutputstream.toByteArray(), mergedDoc.getDestinationFileName());
} catch (Exception ex) {
logger.error("Error in merge pdf process", ex);
throw ex;
}
}
}