private static Bitmap ProcessImage(Bitmap image, byte blueThreshold = 139)
{
try
{
var imageClone = image.Clone(new Rectangle(0, 0, image.Width, image.Height), image.PixelFormat);
var info = new CaptchaInfo();
imageClone = imageClone.AdjustCurves2()
.GetCaptchaInfo(ref info);
imageClone = image.AdjustCurves2()
.CleanUnecessaryPixel(info)
.BlackenColor()
.CleanUnecessaryPixel(info)
.Sharpen();
return(imageClone);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return(null);
}
private CaptchaInfo EnsureCaptchaInfo()
{
var challengeCode = m_factory.ChallengeCodeProvider().ReadChallengeCode(m_context.Request.Params);
if (challengeCode == null)
{
return(CaptchaInfo.Invalid);
}
var ci = new CaptchaInfo()
{
ChallengeCode = challengeCode,
TuringNumber = m_factory.TuringNumberProvider().NextTuringNumber()
};
// Map Challenge with TuringNumber
if (!m_factory.ChallengeCache().Store(new DataKey <Pair <DateTime, string> >(string.Concat(m_path, challengeCode))
{
Value = new Pair <DateTime, string>(DateTime.UtcNow, ci.TuringNumber)
}, m_maxTimeout))
{
ci = CaptchaInfo.Invalid;
}
return(ci);
}
private void button1_Click(object sender, EventArgs e)
{
paintableControl1.AllowDraw = false;
Application.DoEvents();
try
{
CaptchaInfo captcha = _controller.GetCaptcha();
CaptchaForm f = new CaptchaForm();
f.CurrentCaptchaInfo = captcha;
f.ShowDialog();
string guess = f.CaptchaGuess;
byte[] bytes;
using (MemoryStream ms = new MemoryStream())
{
paintableControl1.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
bytes = ms.ToArray();
ms.Close();
}
_controller.SaveImage(bytes, captcha.id, guess);
}
catch (Exception ex)
{
MessageBox.Show("Error: " + ex.Message);
return;
}
MessageBox.Show("Success, this application will now exit");
_imageStream.Close();
Application.DoEvents();
Close();
}
public IHttpActionResult Check(string name, [FromBody] CaptchaInfo captchaInfo)
{
try
{
var code = CookieUtils.GetCookie("SS-" + name);
if (string.IsNullOrEmpty(code) || CacheUtils.Exists($"SiteServer.API.Controllers.V1.CaptchaController.{code}"))
{
return(BadRequest("验证码已超时，请点击刷新验证码！"));
}
CookieUtils.Erase("SS-" + name);
CacheUtils.InsertMinutes($"SiteServer.API.Controllers.V1.CaptchaController.{code}", true, 10);
if (!StringUtils.EqualsIgnoreCase(code, captchaInfo.Captcha))
{
return(BadRequest("验证码不正确，请重新输入！"));
}
return(Ok(new
{
Value = true
}));
}
catch (Exception ex)
{
LogUtils.AddErrorLog(ex);
return(InternalServerError(ex));
}
}
private CaptchaInfo CreateCaptcha()
{
char[] cText = new char[4];
cText[0] = (char)_random.Next(97, 123);
cText[1] = (char)_random.Next(97, 123);
cText[2] = (char)_random.Next(97, 123);
cText[3] = (char)_random.Next(97, 123);
string text = new string(cText);
Image img = new Bitmap(50, 30);
using (Graphics g = Graphics.FromImage(img))
{
g.DrawString(text, _font, _brush, 4, 4);
}
byte[] imgBytes;
using (MemoryStream ms = new MemoryStream())
{
img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
imgBytes = ms.ToArray();
}
CaptchaInfo ci = new CaptchaInfo();
ci.image = imgBytes;
ci.id = _random.Next(int.MinValue, int.MaxValue);
//we add the captcha generated to a cache to lookup upon submission
//will expire in 30 seconds
_cache.Add(ci.id.ToString(), text, null, Cache.NoAbsoluteExpiration, _timeSpan, CacheItemPriority.Default, null);
return(ci);
}
/// <summary>
/// 显示验证码图片
/// </summary>
public void ToImage()
{
string codes = Utils.GetRandCode(4);
this.pg.Session.Add("VerifyCodes", codes);
CaptchaInfo captcha = CaptchaProvider.GetInstance().GenerateImage(codes, 200, 40, System.Drawing.Color.WhiteSmoke);
this.pg.Response.Clear();
this.pg.Response.ContentType = captcha.ContentType;
captcha.Image.Save(this.pg.Response.OutputStream, captcha.ImageFormat);
}
private bool ValidateCaptcha(string answer, string correctAnswer, string initializationVector, string key)
{
var commentWebServiceType = Type.GetType("Telerik.Sitefinity.Services.Comments.CommentWebService, Telerik.Sitefinity");
var commentWebServiceInstance = Activator.CreateInstance(commentWebServiceType);
var validateMethodInfo = commentWebServiceType.GetMethod("Validate", BindingFlags.NonPublic | BindingFlags.Instance, null, new Type[] { typeof(CaptchaInfo) }, null);
var captchaInfo = new CaptchaInfo()
{
Answer = answer, CorrectAnswer = correctAnswer, InitializationVector = initializationVector, Key = key
};
var result = validateMethodInfo.Invoke(commentWebServiceInstance, new object[] { captchaInfo }) as bool?;
return(result.HasValue && result.Value);
}
public void CanRoundTripCaptchaInfo()
{
DateTime date =
DateTime.ParseExact(DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss", CultureInfo.InvariantCulture),
"yyyy/MM/dd HH:mm:ss", CultureInfo.InvariantCulture);
var info = new CaptchaInfo("My Test");
info.WarpFactor = CaptchaImage.FontWarpFactor.High;
info.DateGenerated = date;
string encrypted = info.ToEncryptedString();
Assert.IsTrue(encrypted.IndexOf("My Test") < 0);
info = CaptchaInfo.FromEncryptedString(encrypted);
Assert.AreEqual("My Test", info.Text);
Assert.AreEqual(CaptchaImage.FontWarpFactor.High, info.WarpFactor);
Assert.AreEqual(date, info.DateGenerated);
}
/// <summary>
/// Gera um novo captcha
/// </summary>
/// <param name="randomText">Texto do captcha</param>
/// <param name="settings">parâmetros para a geração</param>
/// <returns></returns>
public CaptchaInfo Generate(string randomText, CaptchaSettings settings)
{
_settings = settings;
CaptchaInfo result = new CaptchaInfo();
CaptchaImage captcha = new CaptchaImage(randomText, _settings.Width, _settings.Height, _settings.Font);
using (MemoryStream ms = new MemoryStream())
{
captcha.Image.Save(ms, ImageFormat.Jpeg);
result.Image = ms.ToArray();
result.Uid = Guid.NewGuid();
_pendingCaptcha.Add(result.Uid, new CaptchaStore()
{
Text = randomText,
IsCaseSensitive = _settings.IsCaseSensitive
});
}
return(result);
}
public IHttpActionResult Check(string name, [FromBody] CaptchaInfo captchaInfo)
{
try
{
var code = CookieUtils.GetCookie("SS-" + name);
var isValid = StringUtils.EqualsIgnoreCase(code, captchaInfo.Captcha);
if (!isValid)
{
return(BadRequest("验证码不正确"));
}
return(Ok(new OResponse(true)));
}
catch (Exception ex)
{
LogUtils.AddErrorLog(ex);
return(InternalServerError(ex));
}
}
private bool ValidateCaptcha(string answer, string correctAnswer, string initializationVector, string key)
{
var commentWebServiceType = Type.GetType("Telerik.Sitefinity.Services.Comments.CommentWebService, Telerik.Sitefinity");
var commentWebServiceInstance = Activator.CreateInstance(commentWebServiceType);
var validateMethodInfo = commentWebServiceType.GetMethod("Validate", BindingFlags.NonPublic | BindingFlags.Instance, null, new Type[] { typeof(CaptchaInfo) }, null);
var captchaInfo = new CaptchaInfo()
{
Answer = answer, CorrectAnswer = correctAnswer, InitializationVector = initializationVector, Key = key
};
bool?result;
// Workaround culture issues in the Captcha validation. Remove this region for Sitefinity 9.0.
using (new CultureRegion(System.Globalization.CultureInfo.InvariantCulture))
{
result = validateMethodInfo.Invoke(commentWebServiceInstance, new object[] { captchaInfo }) as bool?;
}
return(result.HasValue && result.Value);
}
private static System.Drawing.Bitmap ProcessImage(System.Drawing.Bitmap image)
{
System.Drawing.Bitmap bitmap = null;
try
{
bitmap = image.Clone(new System.Drawing.Rectangle(0, 0, image.Width, image.Height), image.PixelFormat);
CaptchaInfo captchaInfo = new CaptchaInfo();
bitmap = bitmap.AdjustCurves(127).RemoveNoise(new string[]
{
"ff000000"
}).GetCaptchaInfo(ref captchaInfo);
System.Drawing.Color c = System.Drawing.ColorTranslator.FromHtml("#" + captchaInfo.CaptchaColor);
float num = c.BrightnessLevel();
byte threshold = (byte)(80f * num + 50f);
if (c.B >= 250 && c.R == 0 && c.G == 0)
{
threshold = 144;
}
else if (c.B >= 250 && (c.R == 0 || c.G == 0))
{
threshold = 135;
}
else if (c.R == 255 && c.G == 255)
{
threshold = 142;
}
bitmap = image.AdjustCurves(threshold)
.RemoveNoise(new string[] { "ff000000" })
.CleanUnecessaryPixel(captchaInfo).GetLongColoredText();
//bitmap.Save("Test.jpg");
}
catch (System.Exception ex)
{
System.Console.WriteLine(ex.Message);
}
return(bitmap);
}
public IHttpActionResult Check(string name, [FromBody] CaptchaInfo captchaInfo)
{
try
{
var code = CookieUtils.GetCookie("SS-" + name);
if (string.IsNullOrEmpty(code))
{
return BadRequest("验证码已超时，请点击刷新验证码图片！");
}
if (!StringUtils.EqualsIgnoreCase(code, captchaInfo.Captcha))
{
return BadRequest("验证码不正确，请重新输入！");
}
return Ok(new OResponse(true));
}
catch (Exception ex)
{
LogUtils.AddErrorLog(ex);
return InternalServerError(ex);
}
}
private CaptchaInfo EnsureCaptchaInfo()
{
const string Key = "C";
var ci = m_context.Items[Key] as CaptchaInfo;
if (ci != null)
{
return(ci);
}
var challengeCode = m_factory.ChallengeCodeProvider().ReadChallengeCode(m_context.Request.Params);
if (challengeCode != null)
{
ci = new CaptchaInfo();
ci.ChallengeCode = challengeCode;
ci.VaryByCustom = m_factory.VaryByCustomProvider().NextVaryByCustomString();
ci.TuringNumber = EnsureTuringNumber(ci.VaryByCustom);
// Map Challenge with TuringNumber
if (!m_factory.ChallengeCache().Store(new DataKey <Pair <DateTime, string> >(string.Concat(m_path, challengeCode))
{
Value = new Pair <DateTime, string>(DateTime.UtcNow, ci.TuringNumber)
}, m_maxTimeout))
{
ci = CaptchaInfo.Invalid;
}
}
else
{
ci = CaptchaInfo.Invalid;
}
m_context.Items.Add(Key, ci);
m_factory.InstrumentationProvider().FireIssued(ci.Valid);
return(ci);
}
private async Task GetCode(HttpContext context)
{
Random rd = new Random();
_PositionX = rd.Next(_MinRangeX, _MaxRangeX);
_PositionY = rd.Next(_MinRangeY, _MaxRangeY);
context.Session.SetInt32("code", _PositionX);
context.Session.SetInt32("code_errornum", 0);
int[] a = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 };
int[] array = a.OrderBy(x => Guid.NewGuid()).ToArray();
Bitmap bmp;
var capchaPic = Path.Combine(path, (new Random()).Next(0, _ImgNum - 1) + ".jpg");
var filename = Path.Combine(environment.ContentRootPath, capchaPic);
if (!File.Exists(filename))
{
var embeddedFileProvider = new Microsoft.Extensions.FileProviders.EmbeddedFileProvider(this.GetType().Assembly, this.GetType().Assembly.GetName().Name);
var allResources = embeddedFileProvider.GetDirectoryContents(string.Empty);
var embedFile = embeddedFileProvider.GetFileInfo(capchaPic.Replace(Path.DirectorySeparatorChar, '.'));
if (!embedFile.Exists)
{
throw new ArgumentNullException("can not found captcha picture");
}
bmp = new Bitmap(embedFile.CreateReadStream());
}
else
{
bmp = new Bitmap(filename);
}
string ls_small = "data:image/jpg;base64," + ImgToBase64String(cutImage(bmp, _shearSize, _shearSize, _PositionX, _PositionY));
Bitmap lb_normal = GetNewBitMap(bmp, _shearSize, _shearSize, _PositionX, _PositionY);
string ls_confusion = "data:image/jpg;base64," + ImgToBase64String(ConfusionImage(array, lb_normal));
var captchaInfo = new CaptchaInfo
{
Errcode = 0,
Y = _PositionY,
Array = string.Join(",", array),
ImgX = _ImgWidth,
ImgY = _ImgHeight,
Small = ls_small,
Normal = ls_confusion
};
/* errcode: 状态值 成功为0
* y:裁剪图片y轴位置
* small：小图字符串
* normal：剪切小图后的原图并按无序数组重新排列后的图
* array：无序数组
* imgx：原图宽
* imgy：原图高
*/
var viewResult = viewEngine.GetView("~/", "~/Views/Shared/SlideCaptcha.cshtml", true);
if (viewResult.Success)
{
//创建临时的StringWriter实例，用来配置到视图上下文中
using (var output = new StringWriter())
{
//视图上下文对于视图渲染来说很重要，视图中的前后台交互都需要它
var viewContext = new ViewContext()
{
HttpContext = context,
Writer = output,
RouteData = new Microsoft.AspNetCore.Routing.RouteData()
{
},
ViewData = new ViewDataDictionary(new EmptyModelMetadataProvider(), new ModelStateDictionary())
{
Model = captchaInfo
},
TempData = new TempDataDictionary(context, tempDataProvider), //ViewData
View = viewResult.View,
FormContext = new FormContext(),
ActionDescriptor = new Microsoft.AspNetCore.Mvc.Abstractions.ActionDescriptor()
};
//渲染
await viewResult.View.RenderAsync(viewContext);
var html = output.ToString();
context.Response.ContentType = "text/html";
//输出到响应体
await context.Response.WriteAsync(html);
}
}
else
{
await context.Response.WriteAsync(jsonHelper.Serialize(captchaInfo).ToString());
}
}
/// <summary>
/// 生成二维码图片
/// </summary>
/// <param name="captchaCount"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
public async Task <CaptchaInfo> CreateCaptcha(int captchaCount, int width, int height)
{
var model = new CaptchaInfo
{
ContentType = ContentType
};
var chars = new char[captchaCount];
var len = _characters.Count;
var random = new Random();
//随机生成验证码
for (var i = 0; i < chars.Length; i++)
{
var val = random.Next(len);
chars[i] = _characters[val];
}
var captcha = string.Join(string.Empty, chars); //取出验证码
model.Answer = await Des.Encrypt(captcha); //加密
//定义字体集合
var fontNames = new List <string>
{
"Helvetica", "Arial", "Lucida Family", "Verdana", "Tahoma", "Trebuchet MS", "Georgia", "Times"
};
// Bitmap 类 封装 GDI + 包含图形图像和其属性的像素数据的位图。 一个 Bitmap 是用来处理图像像素数据所定义的对象。
//Bitmap 类 继承自 抽象基类 Image 类
using (var bitmap = new Bitmap(width, height))
{
//Graphics 类 封装一个 GDI+ 绘图图面。
using (var graphics = Graphics.FromImage(bitmap))
{
///填充背景色
graphics.Clear(Color.White);
Disturb(random, bitmap, graphics, width / 2, height);
//添加灰色边框
var pen = new Pen(Color.Silver);
graphics.DrawRectangle(pen, 0, 0, width, height);
var x = 1;
var y = 5;
//定义一个矩形
var rectanngle = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
//随机颜色
//var color = Color.FromArgb(random.Next(110, 122), random.Next(110, 122), random.Next(110, 122));
foreach (var i in chars)
{
//随机选择字符 字体 大小
var fontName = fontNames[random.Next(0, fontNames.Count - 1)];
var font = new Font(fontName, random.Next(15, 20), FontStyle.Bold | FontStyle.Italic);
///渐变字符颜色
using (var brush = new LinearGradientBrush(rectanngle, Color.Blue, Color.DarkRed, 1.2f, true))
{
brush.SetSigmaBellShape(0.5f);
graphics.DrawString(i.ToString(), font, brush, x + random.Next(-2, 2), y + random.Next(-5, 5));
x = x + width / captchaCount;
}
}
using (var ms = new MemoryStream())
{
bitmap.Save(ms, ImageFormat.Jpeg);
model.Image = ms.ToArray();
return(model);
}
}
}
}
/// <summary>
/// Validates the post request.
/// </summary>
/// <param name="threadType">Type of the thread.</param>
/// <param name="captchaInfo">The captcha information.</param>
/// <param name="skipCaptia">if set to <c>true</c> [skip captia].</param>
public static void ValidatePostRequest(string threadType, CaptchaInfo captchaInfo, bool skipCaptia)
{
CommentsWebServiceReflector.ValidatePostRequestReflect(threadType, captchaInfo, skipCaptia);
}
private bool ValidateCaptcha(string answer, string correctAnswer, string initializationVector, string key)
{
var commentWebServiceType = Type.GetType("Telerik.Sitefinity.Services.Comments.CommentWebService, Telerik.Sitefinity");
var commentWebServiceInstance = Activator.CreateInstance(commentWebServiceType);
var validateMethodInfo = commentWebServiceType.GetMethod("Validate", BindingFlags.NonPublic | BindingFlags.Instance, null, new Type[] { typeof(CaptchaInfo) }, null);
var captchaInfo = new CaptchaInfo() { Answer = answer, CorrectAnswer = correctAnswer, InitializationVector = initializationVector, Key = key };
var result = validateMethodInfo.Invoke(commentWebServiceInstance, new object[] { captchaInfo }) as bool?;
return result.HasValue && result.Value;
}
private bool ValidateCaptcha(string answer, string correctAnswer, string initializationVector, string key)
{
var commentWebServiceType = Type.GetType("Telerik.Sitefinity.Services.Comments.CommentWebService, Telerik.Sitefinity");
var commentWebServiceInstance = Activator.CreateInstance(commentWebServiceType);
var validateMethodInfo = commentWebServiceType.GetMethod("Validate", BindingFlags.NonPublic | BindingFlags.Instance, null, new Type[] { typeof(CaptchaInfo) }, null);
var captchaInfo = new CaptchaInfo() { Answer = answer, CorrectAnswer = correctAnswer, InitializationVector = initializationVector, Key = key };
bool? result;
// Workaround culture issues in the Captcha validation. Remove this region for Sitefinity 9.0.
using (new CultureRegion(System.Globalization.CultureInfo.InvariantCulture))
{
result = validateMethodInfo.Invoke(commentWebServiceInstance, new object[] { captchaInfo }) as bool?;
}
return result.HasValue && result.Value;
}
