如何利用”七牛云”在UEditor实现图片的上传和浏览

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using System.Web;
using Qiniu.Auth;
using Qiniu.IO;
using Qiniu.IO.Resumable;
using Qiniu.RS;/// <summary>
/// UploadHandler 的摘要说明
/// </summary>
public class UploadHandler : Handler
{ public UploadConfig UploadConfig { get; private set; }
public UploadResult Result { get; private set; } public UploadHandler(HttpContext context, UploadConfig config)
: base(context)
{
this.UploadConfig = config;
this.Result = new UploadResult() { State = UploadState.Unknown };
} public override void Process()
{
byte[] uploadFileBytes = null;
string uploadFileName = null; if (UploadConfig.Base64)
{
uploadFileName = UploadConfig.Base64Filename;
uploadFileBytes = Convert.FromBase64String(Request[UploadConfig.UploadFieldName]);
}
else
{
var file = Request.Files[UploadConfig.UploadFieldName];
uploadFileName = file.FileName; if (!CheckFileType(uploadFileName))
{
Result.State = UploadState.TypeNotAllow;
WriteResult();
return;
}
if (!CheckFileSize(file.ContentLength))
{
Result.State = UploadState.SizeLimitExceed;
WriteResult();
return;
} uploadFileBytes = new byte[file.ContentLength];
try
{
file.InputStream.Read(uploadFileBytes, , file.ContentLength);
}
catch (Exception)
{
Result.State = UploadState.NetworkError;
WriteResult();
}
} Result.OriginFileName = uploadFileName;
DateTime today = DateTime.Today;
string qiNiuFileName = "upload/" + today.Year + "/" + today.Month + "/" + today.Day + "/" + RuPengCommons.CommonHelper.CalcMD5(uploadFileBytes) + Path.GetExtension(uploadFileName); // var savePath = PathFormatter.Format(uploadFileName, UploadConfig.PathFormat);
// var localPath = Server.MapPath(savePath);
try
{
// if (!Directory.Exists(Path.GetDirectoryName(localPath)))
// {
// Directory.CreateDirectory(Path.GetDirectoryName(localPath));
// }
// File.WriteAllBytes(localPath, uploadFileBytes);
// Result.Url = savePath;
// Result.State = UploadState.Success;
Qiniu.Conf.Config.ACCESS_KEY = "MUahZ72rD1AMFaLqKBk0I382FSVVWib8ArK-7oKP";
Qiniu.Conf.Config.SECRET_KEY = "mi3P4qzsfXiHJ7Rr9wwCBH7smRHQabpRnEFeDIuw";
//上传域名为：上传到华东1区的域名为up.qiniu.com、up-z0.qiniu.com和upload.qiniu.com；上传到华北1区的域名为up-z1.qiniu.com和upload-z1.qiniu.com
Qiniu.Conf.Config.UP_HOST = "http://up-z1.qiniu.com";
IOClient target = new IOClient();
PutExtra extra = new PutExtra();
//设置上传的空间
String bucket = "tupian";
//设置上传的文件的key值
String key = qiNiuFileName; //普通上传,只需要设置上传的空间名就可以了,第二个参数可以设定token过期时间
PutPolicy put = new PutPolicy(bucket, ); //调用Token()方法生成上传的Token
string upToken = put.Token();
//上传文件的路径
MemoryStream ms = new MemoryStream(uploadFileBytes); //调用PutFile()方法上传
// PutRet ret = target.PutFile(upToken, key, filePath, extra);
PutRet ret = target.Put(upToken, key,ms, extra); Result.Url = "http://od6b842wn.bkt.clouddn.com/" + qiNiuFileName; Result.State = UploadState.Success;
}
catch (Exception e)
{
Result.State = UploadState.FileAccessError;
Result.ErrorMessage = e.Message;
}
finally
{
WriteResult();
}
} private void WriteResult()
{
this.WriteJson(new
{
state = GetStateMessage(Result.State),
url = Result.Url,
title = Result.OriginFileName,
original = Result.OriginFileName,
error = Result.ErrorMessage
});
} private string GetStateMessage(UploadState state)
{
switch (state)
{
case UploadState.Success:
return "SUCCESS";
case UploadState.FileAccessError:
return "文件访问出错，请检查写入权限";
case UploadState.SizeLimitExceed:
return "文件大小超出服务器限制";
case UploadState.TypeNotAllow:
return "不允许的文件格式";
case UploadState.NetworkError:
return "网络错误";
}
return "未知错误";
} private bool CheckFileType(string filename)
{
var fileExtension = Path.GetExtension(filename).ToLower();
return UploadConfig.AllowExtensions.Select(x => x.ToLower()).Contains(fileExtension);
} private bool CheckFileSize(int size)
{
return size < UploadConfig.SizeLimit;
}
}public class UploadConfig
{
/// <summary>
/// 文件命名规则
/// </summary>
public string PathFormat { get; set; } /// <summary>
/// 上传表单域名称
/// </summary>
public string UploadFieldName { get; set; } /// <summary>
/// 上传大小限制
/// </summary>
public int SizeLimit { get; set; } /// <summary>
/// 上传允许的文件格式
/// </summary>
public string[] AllowExtensions { get; set; } /// <summary>
/// 文件是否以 Base64 的形式上传
/// </summary>
public bool Base64 { get; set; } /// <summary>
/// Base64 字符串所表示的文件名
/// </summary>
public string Base64Filename { get; set; }
}public class UploadResult
{
public UploadState State { get; set; }
public string Url { get; set; }
public string OriginFileName { get; set; } public string ErrorMessage { get; set; }
}public enum UploadState
{
Success = ,
SizeLimitExceed = -,
TypeNotAllow = -,
FileAccessError = -,
NetworkError = -,
Unknown = ,
}