upload_json.ashx
3.2 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
<%@ webhandler Language="C#" class="Upload" %>
/**
* KindEditor ASP.NET
*
* 本ASP.NET程序是演示程序，建议不要直接在实际项目中使用。
* 如果您确定直接使用本程序，使用之前请仔细确认相关安全设置。
*
*/
using System;
using System.Collections;
using System.Web;
using System.IO;
using System.Globalization;
using LitJson;
public class Upload : IHttpHandler
{
private HttpContext context;
public void ProcessRequest(HttpContext context)
{
String aspxUrl = context.Request.Path.Substring(0, context.Request.Path.LastIndexOf("/") + 1);
//文件保存目录路径
String savePath = "../attached/";
//文件保存目录URL
String saveUrl = aspxUrl + "../attached/";
//定义允许上传的文件扩展名
Hashtable extTable = new Hashtable();
extTable.Add("image", "gif,jpg,jpeg,png,bmp");
extTable.Add("flash", "swf,flv");
extTable.Add("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
extTable.Add("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");
//最大文件大小
int maxSize = 1000000;
this.context = context;
HttpPostedFile imgFile = context.Request.Files["imgFile"];
if (imgFile == null)
{
showError("请选择文件。");
}
String dirPath = context.Server.MapPath(savePath);
if (!Directory.Exists(dirPath))
{
showError("上传目录不存在。");
}
String dirName = context.Request.QueryString["dir"];
if (String.IsNullOrEmpty(dirName)) {
dirName = "image";
}
if (!extTable.ContainsKey(dirName)) {
showError("目录名不正确。");
}
String fileName = imgFile.FileName;
String fileExt = Path.GetExtension(fileName).ToLower();
if (imgFile.InputStream == null || imgFile.InputStream.Length > maxSize)
{
showError("上传文件大小超过限制。");
}
if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(((String)extTable[dirName]).Split(','), fileExt.Substring(1).ToLower()) == -1)
{
showError("上传文件扩展名是不允许的扩展名。\n只允许" + ((String)extTable[dirName]) + "格式。");
}
//创建文件夹
dirPath += dirName + "/";
saveUrl += dirName + "/";
if (!Directory.Exists(dirPath)) {
Directory.CreateDirectory(dirPath);
}
String ymd = DateTime.Now.ToString("yyyyMMdd", DateTimeFormatInfo.InvariantInfo);
dirPath += ymd + "/";
saveUrl += ymd + "/";
if (!Directory.Exists(dirPath)) {
Directory.CreateDirectory(dirPath);
}
String newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo) + fileExt;
String filePath = dirPath + newFileName;
imgFile.SaveAs(filePath);
String fileUrl = saveUrl + newFileName;
Hashtable hash = new Hashtable();
hash["error"] = 0;
hash["url"] = fileUrl;
context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
context.Response.Write(JsonMapper.ToJson(hash));
context.Response.End();
}
private void showError(string message)
{
Hashtable hash = new Hashtable();
hash["error"] = 1;
hash["message"] = message;
context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
context.Response.Write(JsonMapper.ToJson(hash));
context.Response.End();
}
public bool IsReusable
{
get
{
return true;
}
}
}