public static async Task <IBook> GetBookSharpCompress(Stream stream)
{
var book = new CompressedBook();
try
{
await book.LoadAsync(stream);
}
catch
{
return(null);
}
if (book.PageCount <= 0)
{
return(null);
}
return(book);
}
public static async Task <(IBook Book, bool IsEpub)> GetBookFromFile(Windows.Storage.IStorageFile file)
{
if (file == null)
{
return(null, false);
}
else if (Path.GetExtension(file.Path).ToLower() == ".pdf")
{
goto Pdf;
}
else if (new string[] { ".zip", ".cbz" }.Contains(Path.GetExtension(file.Path).ToLower()))
{
goto Zip;
}
else if (new string[] { ".rar", ".cbr", ".7z", ".cb7" }.Contains(Path.GetExtension(file.Path).ToLower()))
{
goto SharpCompress;
}
else if (Path.GetExtension(file.Path).ToLower() == ".epub")
{
goto Epub;
}
var stream = await file.OpenStreamForReadAsync();
var buffer = new byte[64];
stream.Read(buffer, 0, stream.Length < 64 ? (int)stream.Length : 64);
stream.Close();
if (buffer.Take(5).SequenceEqual(new byte[] { 0x25, 0x50, 0x44, 0x46, 0x2d }))
{
//pdf
goto Pdf;
}
else if (buffer.Take(6).SequenceEqual(new byte[] { 0x37, 0x7A, 0xBC, 0xAF, 0x27, 0x1C }))
{
//7zip
goto SharpCompress;
}
else if (buffer.Take(4).SequenceEqual(new byte[] { 0x50, 0x4B, 0x03, 0x04 }) ||
buffer.Take(4).SequenceEqual(new byte[] { 0x50, 0x4B, 0x05, 0x06 }) ||
buffer.Take(4).SequenceEqual(new byte[] { 0x50, 0x4B, 0x07, 0x08 })
)
{
//zip
if (buffer.Skip(0x1e).Take(28).SequenceEqual(Encoding.ASCII.GetBytes("mimetypeapplication/epub+zip")))
{
//epub
goto Epub;
}
goto Zip;
}
else if (buffer.Take(7).SequenceEqual(new byte[] { 0x52, 0x61, 0x72, 0x21, 0x1a, 0x07, 0x00 }))
{
//rar
goto SharpCompress;
}
else if (buffer.Take(8).SequenceEqual(new byte[] { 0x52, 0x61, 0x72, 0x21, 0x1a, 0x07, 0x01, 0x00 }))
{
//rar5
goto SharpCompress;
}
return(null, false);
Pdf :;
{
var book = new PdfBook();
try
{
await book.Load(file, async (a) =>
{
var dialog = new Views.PasswordRequestContentDialog();
var result = await dialog.ShowAsync();
if (result == Windows.UI.Xaml.Controls.ContentDialogResult.Primary)
{
return(dialog.Password, dialog.Remember);
}
else
{
throw new Exception();
}
});
}
catch { return(null, false); }
if (book.PageCount <= 0)
{
return(null, false);
}
return(book, false);
}
Zip :;
{
var book = new CbzBook();
try
{
await book.LoadAsync((await file.OpenReadAsync()).AsStream());
}
catch
{
return(null, false);
}
if (book.PageCount <= 0)
{
return(null, false);
}
return(book, false);
}
SharpCompress :;
{
var book = new CompressedBook();
try
{
await book.LoadAsync((await file.OpenReadAsync()).AsStream());
}
catch
{
return(null, false);
}
if (book.PageCount <= 0)
{
return(null, false);
}
return(book, false);
}
Epub :;
{
return(null, true);
}
}
