143 lines
4.3 KiB
C#
143 lines
4.3 KiB
C#
using AOP.Common.DataConversion;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Web;
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namespace SgManager.AI
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{
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public class ImageVerification
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{
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/// <summary>
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/// 验证图片规格
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/// </summary>
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/// <param name="filePath">图片路径</param>
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/// <param name="Msg"></param>
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/// <param name="defaultImageSize">默认图片最大是4MB</param>
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/// <param name="defaultShortLength">默认最短15px</param>
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/// <param name="defaultLongLength">默认最长4096px</param>
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/// <returns>是否验证通过</returns>
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public static bool VerificationImage(string filePath, out string Msg, int defaultImageSize = 1024 * 1024 * 4, int defaultShortLength = 15, int defaultLongLength = 4096)
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{
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bool isPass = true;
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Msg = "";//提示信息
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string filename = System.IO.Path.GetFileName(filePath);
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#region 初始化验证参数
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if (!File.Exists(filePath))
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{
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return false;
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}
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if (string.IsNullOrEmpty(filename))
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{
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Msg = "文件不能为空！";
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return false;
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}
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#endregion
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#region 验证是否是图片
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bool isImg = false;//是否是图片标识
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string[] imgTypeList = new string[] { ".jpg", ".png", "bmp" };
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//得到文件后缀
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string fileType = System.IO.Path.GetExtension(filePath);
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for (int i = 0; i < imgTypeList.Count(); i++)
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{
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if (fileType.ToLower() == imgTypeList[i])
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{
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isImg = true;
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}
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}
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if (!isImg)
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{
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Msg = "上传文件不是图片格式！请重新上传！";
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return false;
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}
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#endregion
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#region 验证图片大小
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int imgSize = defaultImageSize;
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byte[] bs = File.ReadAllBytes(filePath);
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if (bs.Length > imgSize)
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{
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Msg = "图片大小不能" + imgSize / 1024 / 1024 + "MB";
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return false;
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}
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#endregion
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#region 验证图片尺寸大小
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System.Drawing.Image tempImage = System.Drawing.Image.FromFile(filePath);
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int picWidth = tempImage.Width;
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int picHeigth = tempImage.Height;
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if (!(defaultShortLength <= picWidth && picWidth <= defaultLongLength) && (defaultShortLength <= picHeigth && picHeigth <= defaultLongLength))
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{
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Msg = "图片尺寸规格最短边至少" + defaultShortLength + "px，最长边最大" + defaultLongLength + "px,";
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return false;
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}
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#endregion
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return isPass;
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}
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public static APIBaseModel<T> VerificationImage<T>(string imagePath, System.Drawing.Imaging.ImageFormat imageFormat, APIBaseModel<T> tempModel, out string errorMsg, out string strbaser64) where T : class, new()
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{
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#region 基础校验
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string verificationMsg = "";
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strbaser64 = "";
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errorMsg = "";
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bool isVerification = ImageVerification.VerificationImage(imagePath, out verificationMsg);
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if (!isVerification)
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{
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errorMsg += verificationMsg;
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tempModel.state = false;
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tempModel.errorMsg = errorMsg;
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return tempModel;
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}
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strbaser64 = ConvertDataFormatAndImage.ImageToByte64String(imagePath, imageFormat); // 图片的base64编码
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Encoding encoding = Encoding.Default;
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string urlEncodeImage = HttpUtility.UrlEncode(strbaser64);
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byte[] tempBuffer = encoding.GetBytes(urlEncodeImage);
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if (tempBuffer.Length > 1024 * 1024 * 4)
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{
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errorMsg += "图片加密 后的大小超过4MB！";
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tempModel.state = false;
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tempModel.errorMsg = errorMsg;
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return tempModel;
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}
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tempModel.state = true;
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return tempModel;
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#endregion
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}
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}
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}
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