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This commit is contained in:
George Bromov
2026-08-04 14:41:21 +03:00
parent 3cb8fcde60
commit 1a1d6186d8
101 changed files with 23239 additions and 0 deletions
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Api/UploadApi.cs Normal file
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using BitMiracle.LibTiff.Classic;
using Microsoft.AspNetCore.Mvc;
using SkiaSharp;
using Microsoft.Data.SqlClient;
namespace Library.Api;
[Route( "Api/Upload/[action]/{id?}" )]
public class UploadApi : APIController
{
private readonly string m_TempDirectory;
public UploadApi( ILogger<UserApi> logger , IConfiguration configuration )
: base( logger , configuration )
{
m_TempDirectory = configuration.GetValue<string>( "TempDirectory" ) ?? string.Empty;
}
[HttpPost]
public IActionResult StartUpload( )
{
Trace( "/Api/Repository/StartUpload" );
string session = Guid.NewGuid( ).ToString( ).Replace( "-" , null );
using FileStream stream = new( m_TempDirectory + session! , FileMode.CreateNew , FileAccess.Write , FileShare.None );
return Success( session! );
}
[HttpPost]
public IActionResult UploadChunk( string? session , string? payload , long offset )
{
if ( session == null )
return Error( "Invalid call. (session)" );
if ( !ValidateOffset( session , offset ) )
return Error( "Invalid call. (Bad offset)" );
byte[]? bytes = Base64DecodeSafe( payload );
if ( bytes == null )
return Error( "Invalid call. (Bad payload)" );
using FileStream stream = new( m_TempDirectory + session! , FileMode.Append , FileAccess.Write , FileShare.None );
stream.Write( bytes , 0 , bytes.Length );
return Success( "OK" );
}
private static byte[]? PreprocessMP4( string form_file )
{
byte[] file_bytes = System.IO.File.ReadAllBytes( form_file );
if ( file_bytes.Length < 100 )
return null;
return file_bytes;
}
[HttpPost]
public IActionResult SaveMP4Attachment( string? session , long offset , int id )
{
if ( session == null )
return Error( "Invalid call. (Invalid parameters)" );
/* if ( !ValidateOffset( session , offset ) )
return Error( "Invalid call. (Bad offset)" );
*/
byte [] ? pdf_data_array = PreprocessMP4( m_TempDirectory + session! );
if ( pdf_data_array == null )
return Error( "Invalid file" );
SqlDataReader reader = PrepareSQL(@"update gnm_rec set uuid = REPLACE(NEWID( ),'-',''),data_format='mp4' OUTPUT INSERTED.uuid WHERE id = @id")
.AddParameter( "@id" , id )
.ExecuteReader( );
if ( !reader.Read( ) )
return Error( "No such attachment!" );
string? new_uuid = reader.String( 0 );
if ( string.IsNullOrEmpty( new_uuid ) )
return Error( "No such attachment!" );
string original = GetDataDirectory( ) + new_uuid + ".mp4";
System.IO.File.WriteAllBytes( original , pdf_data_array );
return Success( new_uuid );
}
[HttpPost]
public IActionResult SaveCoverImage( string? session , long offset , int id )
{
if ( session == null )
return Error( "Invalid call. (Invalid parameters)" );
if ( !ValidateOffset( session , offset ) )
return Error( "Invalid call. (Bad offset)" );
using SKBitmap? bitmap = PreprocessImage( m_TempDirectory + session! );
if ( bitmap == null )
return Error( "Invalid image" );
SqlDataReader reader = PrepareSQL(@"update gnm set uuid = REPLACE(NEWID( ),'-',''),data_format='jpg' OUTPUT INSERTED.uuid WHERE id = @id")
.AddParameter( "@id" , id )
.ExecuteReader( );
if ( !reader.Read( ) )
return Error( "No such book!" );
string? new_uuid = reader.String( 0 );
if ( string.IsNullOrEmpty( new_uuid ) )
return Error( "No such book!" );
string original = GetDataDirectory( ) + new_uuid + ".jpg";
using SKData bitmap_data = bitmap.Encode( SKEncodedImageFormat.Jpeg , 80 );
byte [] bitmap_data_array = bitmap_data.ToArray( );
System.IO.File.WriteAllBytes( original , bitmap_data_array );
return Success( new_uuid );
}
[HttpPost]
public IActionResult SavePDFAttachment( string? session , long offset , int id )
{
if ( session == null )
return Error( "Invalid call. (Invalid parameters)" );
if ( !ValidateOffset( session , offset ) )
return Error( "Invalid call. (Bad offset)" );
byte [] ? pdf_data_array = PreprocessPDF( m_TempDirectory + session! );
if ( pdf_data_array == null )
return Error( "Invalid file" );
SqlDataReader reader = PrepareSQL(@"update gnm_rec set uuid = REPLACE(NEWID( ),'-',''),data_format='pdf' OUTPUT INSERTED.uuid WHERE id = @id")
.AddParameter( "@id" , id )
.ExecuteReader( );
if ( !reader.Read( ) )
return Error( "No such attachment!" );
string? new_uuid = reader.String( 0 );
if ( string.IsNullOrEmpty( new_uuid ) )
return Error( "No such attachment!" );
string original = GetDataDirectory( ) + new_uuid + ".pdf";
System.IO.File.WriteAllBytes( original , pdf_data_array );
return Success( new_uuid );
}
[HttpPost]
public IActionResult SaveImageAttachment( string? session , long offset , int id )
{
if ( session == null )
return Error( "Invalid call. (Invalid parameters)" );
if ( !ValidateOffset( session , offset ) )
return Error( "Invalid call. (Bad offset)" );
using SKBitmap? bitmap = PreprocessImage( m_TempDirectory + session! );
if ( bitmap == null )
return Error( "Invalid image" );
SqlDataReader reader = PrepareSQL(@"update gnm_rec set uuid = REPLACE(NEWID( ),'-',''),data_format='jpg' OUTPUT INSERTED.uuid WHERE id = @id")
.AddParameter( "@id" , id )
.ExecuteReader( );
if ( !reader.Read( ) )
return Error( "No such attachment!" );
string? new_uuid = reader.String( 0 );
if ( string.IsNullOrEmpty( new_uuid ) )
return Error( "No such attachment!" );
string original = GetDataDirectory( ) + new_uuid + ".jpg";
using SKData bitmap_data = bitmap.Encode( SKEncodedImageFormat.Jpeg , 80 );
byte [] bitmap_data_array = bitmap_data.ToArray( );
System.IO.File.WriteAllBytes( original , bitmap_data_array );
return Success( new_uuid );
}
private static byte[]? Base64DecodeSafe( string? b )
{
if ( b == null )
return null;
try
{
return Convert.FromBase64String( b! );
}
catch ( Exception )
{
}
return null;
}
private bool ValidateOffset( string session , long expected )
{
try
{
FileInfo fi = new( m_TempDirectory + session );
return fi.Length == expected;
}
catch ( Exception )
{
}
return false;
}
private static SKBitmap? PreprocessImage( string local_file )
{
SKBitmap? bitmap = SKBitmap.Decode( local_file );
if ( bitmap == null )
{
bitmap = ConvertTiffToSKBitmap( local_file );
if ( bitmap == null )
return null;
}
if ( bitmap!.IsEmpty || bitmap.IsNull || bitmap.Width < 16 || bitmap.Height < 16 )
return null;
return bitmap;
}
private static SKBitmap? ConvertTiffToSKBitmap( string local_file )
{
SKColor[] pixels;
int width, height;
// open a Tiff stored in the memory stream, and grab its pixels
using ( Tiff tifImg = Tiff.ClientOpen( local_file , "r" , null , new TiffStream( ) ) )
{
FieldValue[] value = tifImg.GetField(TiffTag.IMAGEWIDTH);
width = value[0].ToInt( );
value = tifImg.GetField( TiffTag.IMAGELENGTH );
height = value[0].ToInt( );
// Read the image into the memory buffer
int[] raster = new int[width * height];
if ( !tifImg.ReadRGBAImageOriented( width , height , raster , Orientation.TOPLEFT ) )
{
// Not a valid TIF image.
}
// store the pixels
pixels = new SKColor[width * height];
for ( int y = 0 ; y < height ; y++ )
{
for ( int x = 0 ; x < width ; x++ )
{
int arrayOffset = y * width + x;
int rgba = raster[arrayOffset];
pixels[arrayOffset] = new SKColor( (byte)Tiff.GetR( rgba ) , (byte)Tiff.GetG( rgba ) , (byte)Tiff.GetB( rgba ) , (byte)Tiff.GetA( rgba ) );
}
}
}
return new SKBitmap( width , height )
{
Pixels = pixels
};
}
private static byte[]? PreprocessPDF( string form_file )
{
byte[] file_bytes = System.IO.File.ReadAllBytes( form_file );
if ( file_bytes.Length < 10 )
return null;
if ( file_bytes[0] != (byte)'%' || file_bytes[1] != (byte)'P' || file_bytes[2] != 'D' || file_bytes[3] != 'F' )
return null;
return file_bytes;
}
}