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PdfController.cs
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PdfController.cs
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using DevExpress.Compression;
using DevExpress.Pdf;
using Microsoft.AspNetCore.Mvc;
using Swashbuckle.AspNetCore.Annotations;
using System.Net;
namespace DocumentProcessingWebAPI.Controllers {
[ApiController]
[Route("[controller]/[action]")]
public class PdfController : ControllerBase {
[HttpPost]
[SwaggerResponse((int)HttpStatusCode.OK, "Download a File", typeof(FileContentResult))]
public async Task<IActionResult> Merge(IFormFile[] files) {
try {
MemoryStream result = new MemoryStream();
using (PdfDocumentProcessor processor = new PdfDocumentProcessor()) {
processor.CreateEmptyDocument(result);
foreach (var file in files) {
using (var stream = new MemoryStream()) {
await file.CopyToAsync(stream);
stream.Seek(0, SeekOrigin.Begin);
processor.AppendDocument(stream);
}
}
}
result.Seek(0, SeekOrigin.Begin);
return File(result, "application/pdf", "result.pdf");
} catch (Exception e) {
return StatusCode(500, e.Message + Environment.NewLine + e.StackTrace);
}
}
[HttpPost]
[SwaggerResponse((int)HttpStatusCode.OK, "Download a File", typeof(FileContentResult))]
public async Task<IActionResult> Split(IFormFile file) {
try {
using (PdfDocumentProcessor processor = new PdfDocumentProcessor()) {
using (var stream = new MemoryStream()) {
await file.CopyToAsync(stream);
stream.Seek(0, SeekOrigin.Begin);
processor.LoadDocument(stream, true);
}
Stream zipStream = new MemoryStream();
using (ZipArchive archive = new ZipArchive()) {
for (int i = 0; i < processor.Document.Pages.Count; i++) {
using (PdfDocumentProcessor tempProcessor = new PdfDocumentProcessor()) {
tempProcessor.CreateEmptyDocument();
tempProcessor.Document.Pages.Add(processor.Document.Pages[i]);
Stream result = new MemoryStream();
tempProcessor.SaveDocument(result);
result.Seek(0, SeekOrigin.Begin);
archive.AddStream($"page{i + 1}.pdf", result);
}
}
archive.Save(zipStream);
}
zipStream.Seek(0, SeekOrigin.Begin);
return File(zipStream, "application/zip", "result.zip");
}
} catch (Exception e) {
return StatusCode(500, e.Message + Environment.NewLine + e.StackTrace);
}
}
[HttpPost]
[SwaggerResponse((int)HttpStatusCode.OK, "Download a File", typeof(FileContentResult))]
public async Task<IActionResult> Encrypt(IFormFile file, string password) {
try {
MemoryStream result = new MemoryStream();
using (PdfDocumentProcessor processor = new PdfDocumentProcessor()) {
using (var stream = new MemoryStream()) {
await file.CopyToAsync(stream);
stream.Seek(0, SeekOrigin.Begin);
processor.LoadDocument(stream, true);
}
PdfEncryptionOptions encryptionOptions = new PdfEncryptionOptions();
encryptionOptions.UserPasswordString = password;
encryptionOptions.Algorithm = PdfEncryptionAlgorithm.AES256;
processor.SaveDocument(result, new PdfSaveOptions() { EncryptionOptions = encryptionOptions });
result.Seek(0, SeekOrigin.Begin);
return File(result, "application/pdf", "result.pdf");
}
} catch (Exception e) {
return StatusCode(500, e.Message + Environment.NewLine + e.StackTrace);
}
}
}
}