/// <summary>
/// 远程上传从其他网站复制过来的图片
/// </summary>
public class RemoteUpload
{
/// <summary>
/// 上传的源文件名称
/// </summary>
private string sOriginalFileName;
/// <summary>
/// 上传后的文件名称
/// </summary>
private string sSaveFileName;
/// <summary>
/// 结合 sContentPath 得取的带路径的上传路径名称
/// </summary>
private string sPathFileName;
/// <summary>
/// 上传需要建立目录的临时变量
/// </summary>
/// <permission cref="System.Security.PermissionSet">private</permission>
private string sPath;
/// <summary>
/// 根据 sBaseUrl 参数转化后的路径(包含sUploadDir)路径
/// </summary>
private string sContentPath;
/// <summary>
/// 从HTML文本中下载远程图片
/// </summary>
/// <param name="sHTML">含有图片网址路径的HTML文本</param>
/// <param name="path">保存的路径</param>
/// <param name="Images">返回下载的所有图片文件，以“|”间隔！</param>
/// <returns>返回替换远程图片路径的HTML文本</returns>
public string RtnContent(string sHTML, string path,ref string Images )
{
string s_Content = sHTML;
//设置为在上传内容中搜索指定值的正则表达式
System.Text.RegularExpressions.MatchCollection mc = System.Text.RegularExpressions.Regex.Matches(sHTML, @"((http|https|ftp|rtsp|mms):(\/\/|\\\\){1}(([A-Za-z0-9_-])+[.]){1,}(net|com|cn|org|cc|tv|[0-9]{1,3})(\S*\/)((\S)+[.]{1}(gif|jpg|jpeg|bmp|png)))", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
string[] a_RemoteUrl = new string[mc.Count];
//转入无重复数据
for(int i = 0;i < mc.Count;i++)
{
a_RemoteUrl[i] = (mc[i].Groups[0].ToString());
}
//保存的上传后的文件名称
string SaveFileName;
//文件类型
string SaveFileType;
//上传文件自动建目录标志(年月日)
sPath = this.CreateDateTimeDirectory("3");
sContentPath = path + "upload/";
string VisualPath = path + "upload/";
sPath = (sPath.Trim().Equals(System.String.Empty) ? System.String.Empty : System.String.Concat(sPath, "/"));
//如果不存在建立目录
if(!Directory.Exists(System.IO.Path.Combine(sContentPath, sPath)))
{
Directory.CreateDirectory(System.IO.Path.Combine(sContentPath, sPath));
}
sOriginalFileName = sOriginalFileName + "|";
sSaveFileName = sSaveFileName + "|";
sPathFileName = sPathFileName + "|";
//遍历上传内容中允许的文件
foreach(string str in a_RemoteUrl)
{
//获取上传文件的扩展名
SaveFileType = str.Substring(str.LastIndexOf(".") + 1).ToLower();
//获取上传后的随机文件名
SaveFileName = GetRndFileName(SaveFileType);
//保存远程的文件到本地
if(SaveRemoteFile(SaveFileName, str))
{
sOriginalFileName += str.Substring(str.LastIndexOf("/") + 1) + "|";
sSaveFileName += SaveFileName + "|";
sPathFileName += VisualPath + sPath + SaveFileName + "|";
s_Content = s_Content.Replace(str, VisualPath + sPath + SaveFileName);
}
}
sOriginalFileName = sOriginalFileName.Substring(0, sOriginalFileName.Length - 1);
sSaveFileName = sSaveFileName.Substring(0, sSaveFileName.Length - 1);
sPathFileName = sPathFileName.Substring(0, sPathFileName.Length - 1);
Images = sPathFileName;
return s_Content;
}
private string GetRndFileName(string filetype)
{
string filename = StringHelper.RadomFileName();
return filename + "." + filetype;
}
/// <summary>
/// 保存远程的文件到本地
/// </summary>
/// <param name="s_LocalFileName">保存到本地文件名</param>
/// <param name="s_RemoteFileUrl">远程读取的文件URL</param>
/// <returns>如果保存成功则返回 true,否则返回 false</returns>
/// <remarks>
/// 此方法仅供内部使用，由 ReplaceRemoteUrl 进行调用
/// </remarks>
private bool SaveRemoteFile(string s_LocalFileName, string s_RemoteFileUrl)
{
bool result = false;
string AllowExt = ".jpe|.jpeg|.jpg|.png|.tif|.tiff|.bmp|.gif";
//获取远程文件类型
string sFileExt;
sFileExt = s_RemoteFileUrl.Substring(s_RemoteFileUrl.LastIndexOf("."));
if(AllowExt.IndexOf(sFileExt.ToLower()) == -1)
{
result = false;
}
else
{
using (System.Net.WebClient wc = new System.Net.WebClient())
{
//下载远程文件资源
byte[] buff;
try
{
buff = wc.DownloadData(s_RemoteFileUrl);
}
catch
{
return false;
}
if (buff.Length == 0)
return false;
if (buff.Length / 1024 > 512000)
return false;
using (System.IO.FileStream fs = new System.IO.FileStream(sContentPath + sPath + s_LocalFileName, System.IO.FileMode.Create, System.IO.FileAccess.Write))
{
fs.Write(buff, 0, buff.Length);
fs.Close();
}
}
//加上水印图片
//try
//{
// WebImages mark = new WebImages();
// FileStream fs = new FileStream(sContentPath + sPath + s_LocalFileName, FileMode.Open,FileAccess.Read);
// if(!mark.MakeWaterImage(fs, sContentPath + sPath + s_LocalFileName))
// {
// System.Drawing.Image img = System.Drawing.Image.FromStream(fs);
// img.Save(sContentPath + sPath + s_LocalFileName);
// }
// fs.Close();
// fs.Dispose();
// mark = null;
//}
//catch
//{
//}
result = true;
}
return result;
}
/// <summary>
///
/// </summary>
/// <param name="sign"></param>
/// <returns></returns>
private string CreateDateTimeDirectory(System.String sign)
{
string path = System.String.Empty;
if(sign.Equals("0"))
{
//不建立目录
}
else if(sign.Equals("1"))
{
//以年为标志建立目录
path = DateTime.Now.Year.ToString();
}
else if(sign.Equals("2"))
{
//以年-月为标志建立目录
path = System.String.Concat(DateTime.Now.Year.ToString(), "-", DateTime.Now.Month.ToString("00"));
}
else if(sign.Equals("3"))
{
//以年-月-日为标志建立目录
path = System.String.Concat(DateTime.Now.Year.ToString(), "-", DateTime.Now.Month.ToString("00"), "-", DateTime.Now.Day.ToString("00"));
}
return path;
}
}
