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