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.Web;
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using System.Web.Script.Serialization;
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namespace CY.WebForm.Pages.business
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{
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/// <summary>
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/// FileUploadHandler 的摘要说明
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/// </summary>
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public class FileUploadHandler : IHttpHandler
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{
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public void ProcessRequest(HttpContext context)
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{
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context.Response.ContentType = "application/json";
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try
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{
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if (context.Request.Files.Count > 0)
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{
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HttpPostedFile file = context.Request.Files["file"];
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// 验证文件
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if (file.ContentLength > 0)
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{
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// 检查文件大小是否超过5MB
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if (file.ContentLength > 5 * 1024 * 1024) // 5MB
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{
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throw new Exception("文件不能大于5M");
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}
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// 设置保存路径
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string fileName = DateTime.Now.ToString("HHmmssfff")+ Path.GetFileName(file.FileName);
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string riqi = DateTime.Now.ToString("yyyyMMdd");
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string fileDirectory = "/UpFile/UpFile/" + riqi + "/";
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if ((fileDirectory + fileName).Length>400) // 5MB
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{
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throw new Exception("文件名字过长");
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}
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string fileExtension = Path.GetExtension(fileName);
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string savePath = context.Server.MapPath("~"+ fileDirectory) + fileName;
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// 确保目录存在
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if (!Directory.Exists(context.Server.MapPath("~"+ fileDirectory)))
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{
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Directory.CreateDirectory(context.Server.MapPath("~"+ fileDirectory));
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}
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// 保存文件
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file.SaveAs(savePath);
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// 返回JSON响应
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var response = new
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{
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code = 1,
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message = "文件上传成功",
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fileName = fileName,
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fileSize = file.ContentLength,
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data = fileDirectory + fileName
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};
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context.Response.Write(new JavaScriptSerializer().Serialize(response));
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}
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else
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{
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throw new Exception("文件内容为空");
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}
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}
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else
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{
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throw new Exception("没有接收到文件");
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}
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}
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catch (Exception ex)
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{
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var errorResponse = new
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{
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code = 2,
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message = ex.Message
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};
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context.Response.Write(new JavaScriptSerializer().Serialize(errorResponse));
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}
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}
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public bool IsReusable
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{
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get
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{
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return false;
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}
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}
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}
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}
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