133 lines
4.2 KiB
C#
133 lines
4.2 KiB
C#
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/**
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* Created by visual studio 2010
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* User: xuheng
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* Date: 12-3-8
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* Time: 下午13:33
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* To get the Remote image.
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*/
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using System;
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using System.Web;
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using System.Collections;
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using System.Text.RegularExpressions;
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using System.Net;
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using System.IO;
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namespace FineUI.Examples
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{
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public class getRemoteImage : IHttpHandler
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{
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public void ProcessRequest(HttpContext context)
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{
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string savePath = context.Server.MapPath("upload/"); //保存文件地址
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string[] filetype = { ".gif", ".png", ".jpg", ".jpeg", ".bmp" }; //文件允许格式
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int fileSize = 3000; //文件大小限制，单位kb
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string uri = context.Server.HtmlEncode(context.Request["upfile"]);
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uri = uri.Replace("&", "&");
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string[] imgUrls = Regex.Split(uri, "ue_separate_ue", RegexOptions.IgnoreCase);
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ArrayList tmpNames = new ArrayList();
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WebClient wc = new WebClient();
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HttpWebResponse res;
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String tmpName = String.Empty;
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String imgUrl = String.Empty;
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String currentType = String.Empty;
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try
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{
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for (int i = 0, len = imgUrls.Length; i < len; i++)
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{
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imgUrl = imgUrls[i];
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if (imgUrl.Substring(0, 7) != "http://")
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{
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tmpNames.Add("error!");
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continue;
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}
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//格式验证
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int temp = imgUrl.LastIndexOf('.');
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currentType = imgUrl.Substring(temp).ToLower();
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if (Array.IndexOf(filetype, currentType) == -1)
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{
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tmpNames.Add("error!");
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continue;
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}
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res = (HttpWebResponse)WebRequest.Create(imgUrl).GetResponse();
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//http检测
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if (res.ResponseUri.Scheme.ToLower().Trim() != "http")
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{
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tmpNames.Add("error!");
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continue;
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}
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//大小验证
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if (res.ContentLength > fileSize * 1024)
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{
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tmpNames.Add("error!");
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continue;
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}
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//死链验证
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if (res.StatusCode != HttpStatusCode.OK)
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{
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tmpNames.Add("error!");
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continue;
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}
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//检查mime类型
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if (res.ContentType.IndexOf("image") == -1)
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{
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tmpNames.Add("error!");
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continue;
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}
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res.Close();
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//创建保存位置
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if (!Directory.Exists(savePath))
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{
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Directory.CreateDirectory(savePath);
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}
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//写入文件
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tmpName = DateTime.Now.ToString("yyyy-MM-dd") + "/" + System.Guid.NewGuid() + currentType;
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wc.DownloadFile(imgUrl, savePath + tmpName);
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tmpNames.Add("upload/" + tmpName);
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}
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}
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catch (Exception)
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{
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tmpNames.Add("error!");
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}
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finally
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{
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wc.Dispose();
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}
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context.Response.Write("{url:'" + converToString(tmpNames) + "',tip:'远程图片抓取成功！',srcUrl:'" + uri + "'}");
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}
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//集合转换字符串
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private string converToString(ArrayList tmpNames)
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{
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String str = String.Empty;
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for (int i = 0, len = tmpNames.Count; i < len; i++)
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{
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str += tmpNames[i] + "ue_separate_ue";
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if (i == tmpNames.Count - 1)
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str += tmpNames[i];
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}
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return str;
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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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} |