public VCodeImgModel Create(string code, int width, int height, ISimCaptchaOptions options)
{
VCodeImgModel rtnResult = new VCodeImgModel {
VCodePos = new List <PointPosModel>()
};
// TODO: 变化点: 答案: 4个字
int rightCodeLength = options.CodeLength;
Bitmap Img = null;
Graphics g = null;
MemoryStream ms = null;
Color[] color_Array = { Color.Black, Color.DarkBlue, Color.Green, Color.Orange, Color.Brown, Color.DarkCyan, Color.Purple };
if (options.Colors != null && options.Colors.Any())
{
List <Color> clrLst = new List <Color>();
foreach (var c in options.Colors)
{
if (c.StartsWith("#"))
{
try
{
clrLst.Add(Color.FromArgb(Convert.ToInt32($"FF{ c[1..]}", 16)));
private VCodeImgModel CreateVCodeImg()
{
VCodeImgModel rtnResult = new VCodeImgModel {
VCodePos = new List <PointPosModel>()
};
string code = RandomCode.Create(this._options);
rtnResult = VCodeImage.Create(code, 200, 200, this._options);
return(rtnResult);
}
/// <summary>
/// 响应验证码,用户会话唯一标识
/// </summary>
/// <returns></returns>
public Task <VCodeResponseModel> VCode()
{
VCodeResponseModel rtnResult = new VCodeResponseModel();
try
{
VCodeImgModel model = CreateVCodeImg();
string userId = Guid.NewGuid().ToString();
rtnResult.code = 0;
rtnResult.message = "获取验证码成功";
rtnResult.data = new VCodeResponseModel.DataModel
{
userId = userId,
vCodeImg = model.ImgBase64,
vCodeTip = model.VCodeTip,
words = model.Words
};
// 生成 vCodeKey: 转为json字符串 -> AES加密
string vCodekeyJsonStr = JsonHelper.Serialize(new VCodeKeyModel
{
ErrorNum = 0,
TS = DateTimeHelper.NowTimeStamp13(),
VCodePos = model.VCodePos
});
string vCodeKey = _encryptHelper.Encrypt(vCodekeyJsonStr, _options.EncryptKey);
// 答案 保存到 此次用户会话对应的 Cache 中
_cacheHelper.Insert <string>(CachePrefixVCodeKey + userId, vCodeKey);
}
catch (Exception ex)
{
rtnResult.code = -1;
rtnResult.message = "获取验证码失败";
_logHelper?.Write(ex.ToString());
}
// TODO: 在.net framework 4.0下未测试
// Task 参考: https://www.cnblogs.com/yaopengfei/p/8183530.html
#if NETFULL40
return(Task.Factory.StartNew(() => { return rtnResult; }));
#else
return(Task.FromResult(rtnResult));
#endif
}
public VCodeImgModel Create(string code, int width, int height)
{
VCodeImgModel rtnResult = new VCodeImgModel {
VCodePos = new List <PointPosModel>()
};
// TODO: 变化点: 答案: 4个字
int rightCodeLength = 4;
Bitmap Img = null;
Graphics g = null;
MemoryStream ms = null;
Random random = new Random();
Color[] color_Array = { Color.Black, Color.DarkBlue, Color.Green, Color.Orange, Color.Brown, Color.DarkCyan, Color.Purple };
string[] fonts = { "lnk Free", "Segoe Print", "Comic Sans MS", "MV Boli", "华文行楷" };
// TODO: 可能有错, 在windows, linux下 分割符不同
string _base = Path.Combine(Environment.CurrentDirectory, "SimCaptcha", "bgImages");
//string _base = Environment.CurrentDirectory + "\\SimCaptcha\\bgImages\\";
var _file_List = System.IO.Directory.GetFiles(_base);
int imageCount = _file_List.Length;
if (imageCount == 0)
{
throw new Exception("image not Null");
}
int imageRandom = random.Next(1, (imageCount + 1));
string _random_file_image = _file_List[imageRandom - 1];
var imageStream = Image.FromFile(_random_file_image);
Img = new Bitmap(imageStream, width, height);
imageStream.Dispose();
g = Graphics.FromImage(Img);
Color[] penColor = { Color.LightGray, Color.Green, Color.Blue };
int code_length = code.Length;
List <string> words = new List <string>();
for (int i = 0; i < code_length; i++)
{
int cindex = random.Next(color_Array.Length);
int findex = random.Next(fonts.Length);
Font f = new Font(fonts[findex], 15, FontStyle.Bold);
Brush b = new SolidBrush(color_Array[cindex]);
int _y = random.Next(height);
if (_y > (height - 30))
{
_y = _y - 60;
}
int _x = width / (i + 1);
if ((width - _x) < 50)
{
_x = width - 60;
}
string word = code.Substring(i, 1);
if (rtnResult.VCodePos.Count < rightCodeLength)
{
(int, int)percentPos = ToPercentPos((width, height), (_x, _y));
// 添加正确答案 位置数据
rtnResult.VCodePos.Add(new PointPosModel()
{
X = percentPos.Item1,
Y = percentPos.Item2,
});
words.Add(word);
}
g.DrawString(word, f, b, _x, _y);
}
rtnResult.Words = words;
rtnResult.VCodeTip = "请依次点击: " + string.Join(",", words);
ms = new MemoryStream();
Img.Save(ms, ImageFormat.Jpeg);
g.Dispose();
Img.Dispose();
ms.Dispose();
rtnResult.ImgBase64 = "data:image/jpg;base64," + Convert.ToBase64String(ms.GetBuffer());
return(rtnResult);
}
public VCodeImgModel Create(string code, int width, int height)
{
VCodeImgModel rtnResult = new VCodeImgModel {
VCodePos = new List <PointPosModel>()
};
// TODO: 变化点: 答案: 4个字
int rightCodeLength = 4;
Bitmap bitmap = null;
Graphics g = null;
MemoryStream ms = null;
Random random = new Random();
Color[] colorArray = { Color.Black, Color.DarkBlue, Color.Green, Color.Orange, Color.Brown, Color.DarkCyan, Color.Purple };
string bgImagesDir = Path.Combine(Environment.CurrentDirectory, "SimCaptcha", "bgImages");
string[] bgImagesFiles = System.IO.Directory.GetFiles(bgImagesDir);
if (bgImagesFiles == null || bgImagesFiles.Length == 0)
{
Console.WriteLine("SimCaptcha/bgImages 需放置背景图片");
throw new Exception("SimCaptcha/bgImages 需放置背景图片");
}
// 字体来自：https://www.zcool.com.cn/special/zcoolfonts/
string fontsDir = Path.Combine(Environment.CurrentDirectory, "SimCaptcha", "fonts");
string[] fontFiles = new DirectoryInfo(fontsDir)?.GetFiles()
?.Where(m => m.Extension.ToLower() == ".ttf")
?.Select(m => m.FullName).ToArray();
if (fontFiles == null || fontFiles.Length == 0)
{
Console.WriteLine("SimCaptcha/fonts 需放置字体文件 .ttf");
throw new Exception("SimCaptcha/fonts 需放置字体文件 .ttf");
}
int imgIndex = random.Next(bgImagesFiles.Length);
string randomImgFile = bgImagesFiles[imgIndex];
var imageStream = Image.FromFile(randomImgFile);
bitmap = new Bitmap(imageStream, width, height);
imageStream.Dispose();
g = Graphics.FromImage(bitmap);
Color[] penColor = { Color.LightGray, Color.Green, Color.Blue };
int code_length = code.Length;
List <string> words = new List <string>();
for (int i = 0; i < code_length; i++)
{
int colorIndex = random.Next(colorArray.Length);
int fontIndex = random.Next(fontFiles.Length);
Font f = LoadFont(fontFiles[fontIndex], 15, FontStyle.Bold);
Brush b = new SolidBrush(colorArray[colorIndex]);
int _y = random.Next(height);
if (_y > (height - 30))
{
_y = _y - 60;
}
int _x = width / (i + 1);
if ((width - _x) < 50)
{
_x = width - 60;
}
string word = code.Substring(i, 1);
if (rtnResult.VCodePos.Count < rightCodeLength)
{
(int, int)percentPos = ToPercentPos((width, height), (_x, _y));
// 添加正确答案 位置数据
rtnResult.VCodePos.Add(new PointPosModel()
{
X = percentPos.Item1,
Y = percentPos.Item2,
});
words.Add(word);
}
g.DrawString(word, f, b, _x, _y);
}
rtnResult.Words = words;
rtnResult.VCodeTip = "请依次点击: " + string.Join(",", words);
ms = new MemoryStream();
bitmap.Save(ms, ImageFormat.Jpeg);
g.Dispose();
bitmap.Dispose();
ms.Dispose();
rtnResult.ImgBase64 = "data:image/jpg;base64," + Convert.ToBase64String(ms.GetBuffer());
return(rtnResult);
}