private static string GetFileNameFromQrParams(
string text, int scale, bool useExtensionUri,
QrEncodeMode encoding, QrErrorCorrection errorCorrect, int version)
{
// Build key string
string fileName = string.Format(
"QrBarcode[{0},{1},{2},{3}]:{4}",
(int)encoding, (int)errorCorrect, version, scale, text);
// Return encoded filename based on key
return(BuildEncodedFileName(fileName, useExtensionUri));
}
private void DecodeFileName()
{
string fileName = Path.GetFileNameWithoutExtension(_fileName);
// Remove file extension and convert from base64
byte[] encryptedFileName = HttpServerUtility.UrlTokenDecode(
fileName);
// Create memory stream backed against encrypted form
MemoryStream memStm = new MemoryStream(encryptedFileName);
// Read from crypto-stream via stream reader in UTF8
StreamReader reader = new StreamReader(memStm, Encoding.UTF8);
fileName = reader.ReadToEnd();
// Lets see if we can parse the string
Match m = FileNameParser.Match(fileName);
if (m.Success)
{
// Validate the hash-code.
string originalFilename = m.Result("${OriginalFilename}");
string hashCode = m.Result("${HashCode}");
if (originalFilename.GetHashCode() != Int32.Parse(hashCode))
{
throw new InvalidOperationException("Filename is not valid.");
}
// Determine encoding system
string encoding = m.Result("${EncodingSystem}");
if (!string.IsNullOrEmpty(encoding))
{
_encodingScheme = (BarcodeSymbology)Int32.Parse(encoding);
}
// Determine barcode height
string barMinHeight = m.Result("${BarMinHeight}");
if (!string.IsNullOrEmpty(barMinHeight))
{
_barMinHeight = Int32.Parse(barMinHeight);
}
string barMaxHeight = m.Result("${BarMaxHeight}");
if (!string.IsNullOrEmpty(barMaxHeight))
{
_barMaxHeight = Int32.Parse(barMaxHeight);
}
// Determine barcode width
string barMinWidth = m.Result("${BarMinWidth}");
if (!string.IsNullOrEmpty(barMinWidth))
{
_barMinWidth = Int32.Parse(barMinWidth);
}
string barMaxWidth = m.Result("${BarMaxWidth}");
if (!string.IsNullOrEmpty(barMaxWidth))
{
_barMaxWidth = Int32.Parse(barMaxWidth);
}
// Determine scale
string scale = m.Result("${Scale}");
if (!string.IsNullOrEmpty(scale))
{
_scale = Int32.Parse(scale);
}
// Parse the barcode off the end of this string
_text = m.Result("${BarCodePayload}");
return;
}
m = QrFileNameParser.Match(fileName);
if (m.Success)
{
// Validate the hash-code.
string originalFilename = m.Result("${OriginalFilename}");
string hashCode = m.Result("${HashCode}");
if (originalFilename.GetHashCode() != Int32.Parse(hashCode))
{
throw new InvalidOperationException("Filename is not valid.");
}
// Determine encoding system
_encodingScheme = BarcodeSymbology.CodeQr;
string encoding = m.Result("${EncodeMode}");
if (!string.IsNullOrEmpty(encoding))
{
_qrEncodingMode = (QrEncodeMode)Int32.Parse(encoding);
}
// Determine error correction scheme
string errorCorrect = m.Result("${ErrorCorrect}");
if (!string.IsNullOrEmpty(errorCorrect))
{
_qrErrorCorrect = (QrErrorCorrection)Int32.Parse(errorCorrect);
}
// Determine version
string version = m.Result("${Version}");
if (!string.IsNullOrEmpty(version))
{
_qrVersion = Int32.Parse(version);
}
// Determine scale
string scale = m.Result("${Scale}");
if (!string.IsNullOrEmpty(scale))
{
_scale = Int32.Parse(scale);
}
// Parse the barcode off the end of this string
_text = m.Result("${BarCodePayload}");
return;
}
throw new InvalidOperationException("Filename is not valid.");
}
private void DecodeFileName()
{
string fileName = Path.GetFileNameWithoutExtension(_fileName);
// Remove file extension and convert from base64
byte[] encryptedFileName = HttpServerUtility.UrlTokenDecode(
fileName);
// Create memory stream backed against encrypted form
MemoryStream memStm = new MemoryStream(encryptedFileName);
// Read from crypto-stream via stream reader in UTF8
StreamReader reader = new StreamReader(memStm, Encoding.UTF8);
fileName = reader.ReadToEnd();
// Lets see if we can parse the string
Match m = FileNameParser.Match(fileName);
if (m.Success)
{
// Validate the hash-code.
string originalFilename = m.Result("${OriginalFilename}");
string hashCode = m.Result("${HashCode}");
if (originalFilename.GetHashCode() != Int32.Parse(hashCode))
{
throw new InvalidOperationException("Filename is not valid.");
}
// Determine encoding system
string encoding = m.Result("${EncodingSystem}");
if (!string.IsNullOrEmpty(encoding))
{
_encodingScheme = (BarcodeSymbology)Int32.Parse(encoding);
}
// Determine barcode height
string barMinHeight = m.Result("${BarMinHeight}");
if (!string.IsNullOrEmpty(barMinHeight))
{
_barMinHeight = Int32.Parse(barMinHeight);
}
string barMaxHeight = m.Result("${BarMaxHeight}");
if (!string.IsNullOrEmpty(barMaxHeight))
{
_barMaxHeight = Int32.Parse(barMaxHeight);
}
// Determine barcode width
string barMinWidth = m.Result("${BarMinWidth}");
if (!string.IsNullOrEmpty(barMinWidth))
{
_barMinWidth = Int32.Parse(barMinWidth);
}
string barMaxWidth = m.Result("${BarMaxWidth}");
if (!string.IsNullOrEmpty(barMaxWidth))
{
_barMaxWidth = Int32.Parse(barMaxWidth);
}
// Determine scale
string scale = m.Result("${Scale}");
if (!string.IsNullOrEmpty(scale))
{
_scale = Int32.Parse(scale);
}
// Parse the barcode off the end of this string
_text = m.Result("${BarCodePayload}");
return;
}
m = QrFileNameParser.Match(fileName);
if (m.Success)
{
// Validate the hash-code.
string originalFilename = m.Result("${OriginalFilename}");
string hashCode = m.Result("${HashCode}");
if (originalFilename.GetHashCode() != Int32.Parse(hashCode))
{
throw new InvalidOperationException("Filename is not valid.");
}
// Determine encoding system
_encodingScheme = BarcodeSymbology.CodeQr;
string encoding = m.Result("${EncodeMode}");
if (!string.IsNullOrEmpty(encoding))
{
_qrEncodingMode = (QrEncodeMode)Int32.Parse(encoding);
}
// Determine error correction scheme
string errorCorrect = m.Result("${ErrorCorrect}");
if (!string.IsNullOrEmpty(errorCorrect))
{
_qrErrorCorrect = (QrErrorCorrection)Int32.Parse(errorCorrect);
}
// Determine version
string version = m.Result("${Version}");
if (!string.IsNullOrEmpty(version))
{
_qrVersion = Int32.Parse(version);
}
// Determine scale
string scale = m.Result("${Scale}");
if (!string.IsNullOrEmpty(scale))
{
_scale = Int32.Parse(scale);
}
// Parse the barcode off the end of this string
_text = m.Result("${BarCodePayload}");
return;
}
throw new InvalidOperationException("Filename is not valid.");
}
/// <summary>
/// Constructor
/// </summary>
public QRCodeEncoder()
{
_errorCorrect = QrErrorCorrection.M;
_encodeMode = QrEncodeMode.Byte;
_version = 7;
_structureAppendN = 0;
_structureAppendM = 0;
_structureAppendParity = 0;
//_structureAppendOriginaldata = "";
_scale = 4;
_backgroundColor = Color.White;
_foregroundColor = Color.Black;
//QRCODE_DATA_PATH = Environment.CurrentDirectory + @"\" + DATA_PATH;
}
private static string GetFileNameFromQrParams(
string text, int scale, bool useExtensionUri,
QrEncodeMode encoding, QrErrorCorrection errorCorrect, int version)
{
// Build key string
string fileName = string.Format(
"QrBarcode[{0},{1},{2},{3}]:{4}",
(int)encoding, (int)errorCorrect, version, scale, text);
// Return encoded filename based on key
return BuildEncodedFileName(fileName, useExtensionUri);
}
