/// <summary>
/// 转换文件
/// </summary>
/// <param name="source"></param>
/// <param name="target"></param>
/// <param name="d"></param>
/// <returns></returns>
public static bool Convert(string source, string target, AsposeConvertDelegate d)
{
logger.Info("Convert - source=" + source + ", type=" + FileTypeUtil.GetFileType(source));
if (FileTypeUtil.IsWordFile(source))
{
return(WordUtil.ConverToImage(source, target, 300, d));
}
if (FileTypeUtil.IsExcelFile(source))
{
return(ExcelUtil.ConverToImage(source, target, 300, d));
}
if (FileTypeUtil.IsPowerPointFile(source))
{
return(PowerpointUtil.ConverToImage(source, target, 1.5F, d));
}
if (FileTypeUtil.IsVisioFile(source))
{
return(VisioUtil.ConverToImage(source, target, 100, d));
}
if (FileTypeUtil.IsPdfFile(source))
{
return(PDFUtil.ConverToImage(source, target, 100, d));
}
throw new IOException("文件格式当前不支持！");
}
public string Create(byte[] data, string filename)
{
if (data == null || data.Length == 0)
{
throw new ArgumentNullException("data");
}
var extension = Path.GetExtension(filename);
var fileType = FileTypeUtil.DeduceFileTypeFromExtension(extension);
var now = DateTime.Now;
//路径: [文件类型]/[年]/[月日]/[Encode[毫秒]][Encode[随机串]].后缀
//例如：IMAGE/2016/0314/Xb4J3ims7gC4Qyk4.jpg
//注意：文件名区分大小写，必须使用Linux文件系统
//文件句柄: 文件类型年月随机字符串.后缀
//其中文件类型取类型名称的前五个字符，命名时应该注意！
//c# GUID目前采用算法4 即前12位是随机数
//xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
var rnd = BitConverter.ToInt64(Guid.NewGuid().ToByteArray().Take(48).ToArray(), 0);
var fileTypeName = fileType.ToString().Substring(0, 5).PadLeft(5, '0').ToUpper();
var year = string.Format("{0:yyyy}", now);
var monthAndDay = string.Format("{0:MMdd}", now);
var fileName = string.Format("{0}{1}{2}", Encode(GetMillisecondsOfADay(now)),
Encode(rnd),
extension);
var fileHandle = string.Format("{0}{1}{2}{3}", fileTypeName, year, monthAndDay, fileName);
var file = new FileMetadata()
{
FileHandle = fileHandle,
Size = data.Length,
Name = filename,
CreatedAt = now,
FileType = (int)fileType,
Path = Path.Combine(fileTypeName, year, monthAndDay),
MimeType = MimeTypeUtil.GetMimeType(extension)
};
//save it
try
{
var directory = Path.Combine(fileTypeName, year, monthAndDay);
if (!DirectoryExists(directory))
{
if (!DirectoryExists(Path.Combine(fileTypeName, year)))
{
if (!DirectoryExists(fileTypeName))
{
MakeDirectory(fileTypeName);
}
MakeDirectory(Path.Combine(fileTypeName, year));
}
MakeDirectory(directory);
}
var ftpRequest = CreateRequest(Path.Combine(directory, fileName));
ftpRequest.Method = WebRequestMethods.Ftp.UploadFile;
ftpRequest.ContentLength = data.Length;
using (var requestStream = ftpRequest.GetRequestStream())
{
requestStream.Write(data, 0, data.Length);
}
using (var response = ftpRequest.GetResponse())
using (var reader = new StreamReader(response.GetResponseStream()))
{
}
try
{
var md5 = new MD5CryptoServiceProvider().ComputeHash(data);
file.Md5 = BitConverter.ToString(md5).Replace("-", string.Empty);
//todo insert file meta
}
catch (System.Exception error)
{
_logger.Error(string.Format("save filemetadata{0} error", fileHandle), error);
}
}
catch (System.Exception error)
{
_logger.Error(string.Format("create error[{0}]", fileHandle), error);
return(null);
}
return(fileHandle);
}
public string Create(byte[] content, string filename)
{
var extension = Path.GetExtension(filename);
var fileType = FileTypeUtil.DeduceFileTypeFromExtension(extension);
var now = DateTime.Now;
//路径: [文件类型]/[年]/[月日]/[Encode[毫秒]][Encode[随机串]].后缀
//文件句柄: 文件类型年月随机字符串.后缀
//其中文件类型取类型名称的前五个字符，命名时应该注意！
var rnd = BitConverter.ToInt64(Guid.NewGuid().ToByteArray().Take(48).ToArray(), 0);
var fileTypeName = fileType.ToString().Substring(0, 5).PadLeft(5, '0').ToUpper();
var year = string.Format("{0:yyyy}", now);
var monthAndDay = string.Format("{0:MMdd}", now);
var fileName = string.Format("{0}{1}{2}", Encode(GetMillisecondsOfADay(now)),
Encode(rnd),
extension);
var fileHandle = string.Format("{0}{1}{2}{3}", fileTypeName, year, monthAndDay, fileName);
var file = new FileMetadata()
{
FileHandle = fileHandle,
Size = content.Length,
Name = filename,
CreatedAt = now,
FileType = (int)fileType,
Path = Path.Combine(fileTypeName, year, monthAndDay),
MimeType = MimeTypeUtil.GetMimeType(extension)
};
//save file
var directory = Path.Combine(BaseDirectory, fileTypeName, year, monthAndDay);
try
{
if (!Directory.Exists(directory))
{
if (!Directory.Exists(Path.Combine(BaseDirectory, fileTypeName, year)))
{
if (!Directory.Exists(Path.Combine(BaseDirectory, fileTypeName)))
{
Directory.CreateDirectory(Path.Combine(BaseDirectory, fileTypeName));
}
Directory.CreateDirectory(Path.Combine(BaseDirectory, fileTypeName, year));
}
Directory.CreateDirectory(directory);
}
}
catch (Exception error)
{
_logger.Debug(string.Format("create directory error[{0}]", directory), error);
}
try
{
System.IO.File.Create(Path.Combine(directory, fileHandle));
//TODO save metadata to database
}
catch (Exception error)
{
_logger.Error(string.Format("create error[{0}]", fileHandle), error);
return(null);
}
return(fileHandle);
}
