143 lines
4.8 KiB
C#
143 lines
4.8 KiB
C#
// Copyright (c) 2022-Now 少林寺驻北固山办事处大神父王喇嘛
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//
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// SimpleAdmin 基于 Apache License Version 2.0 协议发布，可用于商业项目，但必须遵守以下补充条款:
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// 1.请不要删除和修改根目录下的LICENSE文件。
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// 2.请不要删除和修改SimpleAdmin源码头部的版权声明。
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// 3.分发源码时候，请注明软件出处 https://gitee.com/dotnetmoyu/SimpleAdmin
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// 4.基于本软件的作品，只能使用 SimpleAdmin 作为后台服务，除外情况不可商用且不允许二次分发或开源。
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// 5.请不得将本软件应用于危害国家安全、荣誉和利益的行为，不能以任何形式用于非法为目的的行为。
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// 6.任何基于本软件而产生的一切法律纠纷和责任，均于我司无关。
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namespace SimpleAdmin.Core.Utils;
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/// <summary>
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/// 生成验证码功能
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/// </summary>
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public static class CaptchaUtil
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{
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/// <summary>
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/// 获取验证码
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/// </summary>
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/// <param name="length">验证码数</param>
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/// <param name="width">长度</param>
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/// <param name="height">高度</param>
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/// <param name="fontSize">字体大小</param>
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/// <param name="type">类型 0：数字 1：字符 2：计算</param>
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/// <returns></returns>
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public static CaptchaInfo CreateCaptcha(CaptchaType type = CaptchaType.CHAR, int length = 4, int width = 170,
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int height = 50, int fontSize = 20)
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{
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//初始化验证码
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string charCode;
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var resultCode = "";
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switch (type.ToString())
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{
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case "NUM":
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charCode = CreateNumCode(length);
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break;
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case "ARITH":
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charCode = CreateArithCode(out resultCode);
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break;
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default:
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charCode = CreateCharCode(length);
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break;
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}
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var imageGenerator = new DefaultCaptchaImageGenerator();
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var imageGeneratorOption = new CaptchaImageGeneratorOption
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{
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// 必须设置
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ForegroundColors = DefaultColors.Instance.Colors,
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Width = width,
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Height = height,
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FontSize = fontSize,
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TextBold = true,
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BubbleCount = 1,
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FontFamily = DefaultFontFamilys.Instance.Actionj
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};
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var bytes = imageGenerator.Generate(charCode, imageGeneratorOption);
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var captchaInfo = new CaptchaInfo
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{
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Code = type.ToString() == "ARITH" ? resultCode : charCode,
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Image = bytes
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};
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return captchaInfo;
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}
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/// <summary>
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/// 获取数字验证码
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/// </summary>
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/// <param name="n">验证码数</param>
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/// <returns></returns>
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public static string CreateNumCode(int n)
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{
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char[] numChar = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
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var charCode = string.Empty;
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var random = new Random();
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for (var i = 0; i < n; i++)
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{
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charCode += numChar[random.Next(numChar.Length)];
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}
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return charCode;
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}
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/// <summary>
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/// 获取字符验证码
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/// </summary>
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/// <param name="n">验证码数</param>
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/// <returns></returns>
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public static string CreateCharCode(int n)
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{
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char[] strChar =
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{
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'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
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'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3',
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'4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K',
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'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
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};
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var charCode = string.Empty;
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var random = new Random();
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for (var i = 0; i < n; i++)
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{
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charCode += strChar[random.Next(strChar.Length)];
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}
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return charCode;
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}
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/// <summary>
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/// 获取运算符验证码
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/// </summary>
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/// <returns></returns>
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public static string CreateArithCode(out string resultCode)
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{
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string checkCode;
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var random = new Random();
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var intFirst = random.Next(1, 10);//生成第一个数字
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var intSec = random.Next(1, 10);//生成第二个数字
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int intTemp;
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switch (random.Next(1, 3).ToString())
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{
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case "2":
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if (intFirst < intSec)
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{
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intTemp = intFirst;
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intFirst = intSec;
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intSec = intTemp;
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}
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checkCode = intFirst + "-" + intSec + "=";
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resultCode = (intFirst - intSec).ToString();
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break;
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default:
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checkCode = intFirst + "+" + intSec + "=";
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resultCode = (intFirst + intSec).ToString();
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break;
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}
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return checkCode;
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}
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}
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