public async Task ExtractMessage(
string fileInputLocation,
string password)
{
try
{
using (var input = new FileStream(fileInputLocation, FileMode.Open, FileAccess.Read))
{
ConsoleLogger.LogMessage("Creating decoder instance...");
var decoder = await ImageDecoder.LoadAsync(
imageStream : input,
decodingConfiguration : new DecodingConfiguration
(
password: password,
tempStorageProvider: new MemoryStorageProvider(),
bufferSize: 81920)
);
ConsoleLogger.LogMessage("Creating decoder output handler...");
Output.FileDataOutputHandler handler = new Output.FileDataOutputHandler(
(directory, file, stream) =>
{
if (stream != null)
{
using (StreamReader reader = new StreamReader(stream))
{
ConsoleLogger.LogMessage("Decoding completed");
ConsoleLogger.LogMessage("Message payload: ");
ConsoleLogger.LogMessage(reader.ReadToEnd());
}
}
else
{
ConsoleLogger.ShowErrorMessage("Image doesn't contain any message payload");
}
return(Task.CompletedTask);
}
);
ConsoleLogger.LogMessage("Start decoding image, extracting payload...");
await decoder.DecodeAsync(outputHandler : handler);
}
}
catch (InvalidPasswordException)
{
ConsoleLogger.ShowErrorMessage("Invalid password");
}
catch (Exception ex)
{
ConsoleLogger.ShowErrorMessage(ex.Message);
}
}
public async Task ExtractFiles(
string fileInputLocation,
string password,
string targetDirectory)
{
try
{
using (var input = new FileStream(fileInputLocation, FileMode.Open, FileAccess.Read))
{
ConsoleLogger.LogMessage("Creating decoder instance...");
var decoder = await ImageDecoder.LoadAsync
(
imageStream : input,
decodingConfiguration : new DecodingConfiguration
(
password: password,
tempStorageProvider: new MemoryStorageProvider(),
bufferSize: 81920
));
ConsoleLogger.LogMessage("Creating decoder output handler...");
Output.FileDataOutputHandler handler = new Output.FileDataOutputHandler(
(directory, file, stream) =>
{
if (stream != null)
{
try
{
string fullName = Path.Combine(targetDirectory, file.Name);
if (File.Exists(fullName))
{
File.Delete(fullName);
}
ConsoleLogger.LogMessage($"'{file.Name}' has been extracted to {fullName}");
using (FileStream saveStream = new FileStream(fullName, FileMode.OpenOrCreate, FileAccess.Write))
{
stream.CopyTo(saveStream);
}
}
catch
{
ConsoleLogger.ShowErrorMessage($"Failed to process '{file.Name}' from the image container");
}
}
return(Task.CompletedTask);
}
);
ConsoleLogger.LogMessage("Start decoding image, extracting payload...");
await decoder.DecodeAsync(outputHandler : handler);
}
}
catch (InvalidPasswordException)
{
ConsoleLogger.ShowErrorMessage("Invalid password");
}
catch (Exception ex)
{
ConsoleLogger.ShowErrorMessage(ex.Message);
}
}
