last ...

Extensions/IFormFileExtensions.cs

@@ -0,0 +1,149 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Text;
+using UglyToad.PdfPig;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Http;
+using xCommons.Extensions;
+
+namespace xAiModels.Extensions
+{
+    public static class IFormFileExtensions
+    {
+        /// <summary>
+        /// Read a IFormFile Content as byte array ...
+        /// </summary>
+        /// <param name="source"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<byte[]> ReadAsBytes(
+            this IFormFile source,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            // Create and use a Memory Stream ...
+            using var stream = new MemoryStream();
+
+            //
+            // Copy File Content to Stream ...
+            await source.CopyToAsync(
+                target: stream,
+                cancellationToken: cancellationToken
+            );
+
+            //
+            // Read Stream Content as byte array ...
+            var result = stream.ToArray();
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Read a File Content by it's Path as byte array ...
+        /// </summary>
+        /// <param name="filePath"></param>
+        /// <param name="bufferSize"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        /// <exception cref="Exception"></exception>
+        public static async Task<byte[]> ReadAsBytes(
+            this string filePath,
+            int bufferSize = 81920,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            if (string.IsNullOrWhiteSpace(filePath))
+            {
+                throw new Exception("Invalid Args ...");
+            }
+
+            //
+            // Create and use a Memory Stream ...
+            using var memStream = new MemoryStream();
+
+            //
+            using var stream = new FileStream(
+                path: filePath,
+                mode: FileMode.Open,
+                access: FileAccess.Read,
+                share: FileShare.ReadWrite
+            );
+
+            //
+            // Copy File Content to Stream ...
+            await stream.CopyToAsync(
+                destination: memStream,
+                bufferSize: bufferSize,
+                cancellationToken: cancellationToken
+            );
+
+            //
+            // Read Stream Content as byte array ...
+            var result = memStream.ToArray();
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Read Text Content of Document ...
+        /// </summary>
+        /// <param name="source"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<string> ReadContent(
+            this IFormFile source,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            // Check if File PDF or not ...
+            var isPDF = source.ContentType
+                .ToNormalString()
+                .Contains("pdf"
+                    .ToNormalString());
+
+            //
+            var result = string.Empty;
+
+            //
+            var isValidFileType = isPDF;
+            if (!isValidFileType)
+            {
+                return result;
+            }
+
+            //
+            if (isPDF)
+            {
+                //
+                // Reading File Content as Byte array ...
+                var fileBytes = await source.ReadAsBytes(cancellationToken);
+
+                //
+                // Create a PDF Document ...
+                using var stream = new MemoryStream(fileBytes);
+                using var document = PdfDocument.Open(stream);
+
+                //
+                // Extract PDF Text ...
+                var textBuilder = new StringBuilder();
+                foreach (var page in document.GetPages())
+                {
+                    textBuilder.Append(page.Text);
+                }
+
+                //
+                result = textBuilder.ToString();
+            }
+
+            //
+            return result;
+        }
+    }
+}

xCommons.csproj

@@ -40,6 +40,8 @@
     <PackageReference Include="System.Reactive" Version="5.0.0" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="libphonenumber-csharp" Version="8.12.17" />
+    <PackageReference Include="UglyToad.PdfPig" Version="1.7.0-custom-5" />
+    <PackageReference Include="Spire.PDFfor.NETStandard" Version="12.5.8" />
     <PackageReference Include="Microsoft.AspNetCore.Cors" Version="2.2.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.2.5" />
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="5.0.0" />