public List <ImageURL> GetCaptcha()
{
List <ImageURL> lstImageURL = new List <ImageURL>();
string imageFilePath = currentDirectory + @"\OutputImg\";
string imageName = GetRandomImageName();
Image img = Image.FromFile(currentDirectory + @"\SourceImg\" + imageName);
Bitmap bmpImg = new Bitmap(img);
int width = bmpImg.Width;
int height = bmpImg.Height;
int widthCropSize = width / 3;
int heightCropSize = height / 3;
int currentX = 0;
int currentY = 0;
int currentImageCount = 1;
int captchaId = 0;
List <short> imageDegreeLst = new List <short>();
HashSet <int> excludedNumbers = GetRandomExcludedNumbers();
CaptchaSession captchaSession = new CaptchaSession
{
ImageName = imageName
};
if (captchaSession.Insert(ref captchaId))
{
for (int i = 0; i < 3; i++)
{
if (i != 0)
{
currentY += heightCropSize;
}
// Reset X coordinates when Y is changed
currentX = 0;
for (int j = 0; j < 3; j++)
{
if (j != 0)
{
currentX += widthCropSize;
}
Rectangle cropArea = new Rectangle(currentX, currentY, widthCropSize, heightCropSize);
//cropArea.Intersect(new Rectangle(0, 0, bmpImg.Width, bmpImg.Height));
Bitmap bmpCroppedImage = bmpImg.Clone(cropArea, PixelFormat.DontCare);
short rotationDegreeInt = 0;
// Check if the current image is excluded from rotating or not
if (!excludedNumbers.Contains(currentImageCount))
{
RotateFlipType rotationDegree = GetRotationDegree(ref rotationDegreeInt);
// Apply rotation
bmpCroppedImage.RotateFlip(rotationDegree);
}
// Apply image filter
Bitmap resultBitmap = ApplyRandomFilters(bmpCroppedImage);
string fileName = captchaId + "-" + i + "-" + j + ".png";
//bmpCroppedImage.Save(currentDirectory + @"\OutputImg\" + fileName);
//resultBitmap.Save(currentDirectory + @"\OutputImg\" + fileName);
string base64String = string.Empty;
using (MemoryStream stream = new MemoryStream())
{
resultBitmap.Save(stream, ImageFormat.Bmp);
base64String = Convert.ToBase64String(stream.ToArray());
}
imageDegreeLst.Add(rotationDegreeInt);
// Create imageURL image
ImageURL imageURL = new ImageURL
{
//URL = @"http://fmcc.aquametro.com.sg/ic/OutputImg/" + fileName,
Base64String = base64String,
CaptchaId = captchaId
};
lstImageURL.Add(imageURL);
currentImageCount++;
}
}
CaptchaAttributes captchaAttri = new CaptchaAttributes
{
CaptchaID = captchaId,
Tile1Angle = imageDegreeLst[0],
Tile2Angle = imageDegreeLst[1],
Tile3Angle = imageDegreeLst[2],
Tile4Angle = imageDegreeLst[3],
Tile5Angle = imageDegreeLst[4],
Tile6Angle = imageDegreeLst[5],
Tile7Angle = imageDegreeLst[6],
Tile8Angle = imageDegreeLst[7],
Tile9Angle = imageDegreeLst[8]
};
if (!captchaAttri.Insert())
{
// Return empy list if insertion throws an error
return(new List <ImageURL>());
}
}
excludedNumbers = null;
GC.Collect();
return(lstImageURL);
}
public bool CheckResult(int captchaId, string dataString)
{
bool result = false;
int totalCaptchaTileCount = 0;
CaptchaAttributes captchaAttributes = new CaptchaAttributes();
CaptchaSession captchaSession = new CaptchaSession();
captchaSession = captchaSession.GetCaptchaSession(captchaId);
if (captchaSession.IsValid)
{
captchaAttributes = captchaAttributes.GetCaptchaAttribute_ById(captchaId);
var singleImageString = dataString.Split(';');
for (int i = 0; i < singleImageString.Length; i++)
{
if (String.IsNullOrWhiteSpace(singleImageString[i]))
{
break;
}
// CODE OPTIMIZATION HERE
if (i == 0 || result)
{
var imageKVP = singleImageString[i].Split('=');
short currentDegree = Convert.ToInt16(imageKVP[1]);
switch (imageKVP[0])
{
case "captcha-1":
totalCaptchaTileCount++;
result = isImageDegreeCorrect(currentDegree, captchaAttributes.Tile1Angle);
break;
case "captcha-2":
totalCaptchaTileCount++;
result = isImageDegreeCorrect(currentDegree, captchaAttributes.Tile2Angle);
break;
case "captcha-3":
totalCaptchaTileCount++;
result = isImageDegreeCorrect(currentDegree, captchaAttributes.Tile3Angle);
break;
case "captcha-4":
totalCaptchaTileCount++;
result = isImageDegreeCorrect(currentDegree, captchaAttributes.Tile4Angle);
break;
case "captcha-5":
totalCaptchaTileCount++;
result = isImageDegreeCorrect(currentDegree, captchaAttributes.Tile5Angle);
break;
case "captcha-6":
totalCaptchaTileCount++;
result = isImageDegreeCorrect(currentDegree, captchaAttributes.Tile6Angle);
break;
case "captcha-7":
totalCaptchaTileCount++;
result = isImageDegreeCorrect(currentDegree, captchaAttributes.Tile7Angle);
break;
case "captcha-8":
totalCaptchaTileCount++;
result = isImageDegreeCorrect(currentDegree, captchaAttributes.Tile8Angle);
break;
case "captcha-9":
totalCaptchaTileCount++;
result = isImageDegreeCorrect(currentDegree, captchaAttributes.Tile9Angle);
break;
}
}
}
// Update the captcha to invalid regardless of result
captchaSession.UpdateIsValid(captchaId, false);
captchaSession.DeleteCaptchaMoreThanOneDay();
//DeleteCaptchaImage(captchaId);
}
// If all 9 captcha tiles has not been verified
if (totalCaptchaTileCount != 9)
{
result = false;
}
return(result);
}
