private static void AssertFileSize(string fnWithSize)
{
long fileSizeFromFilename = SafetyFile.GetFileSizeFromFilename(fnWithSize);
FileInfo fileInfo = new FileInfo(fnWithSize);
Trace.Assert(fileSizeFromFilename == fileInfo.Length, "AssertFileSize,文件大小不等");
}
public static FileStream Open(string fn)
{
if (!File.Exists(fn))
{
SafetyFile.TryRestoreFile(fn);
}
return(File.Exists(fn) ? new FileStream(fn, FileMode.Open) : null);
}
public static void Save(string s, string fn)
{
byte[] bytes = Util.EncodingGb2312.GetBytes(s);
using (var ms = new MemoryStream(bytes))
{
SafetyFile.Save(ms, fn);
}
}
private static bool TryRestoreFile(string fn)
{
if (SafetyFile.RestoreFromFileNewSize(fn))
{
return(true);
}
if (SafetyFile.RestoreFromFileOldSize(fn))
{
return(true);
}
return(false);
}
public static void SerializeToFileWithFileName(object obj, string fn, bool isEncrypt = true)
{
if (obj != null)
{
string text = JsonConvert.SerializeObject(obj, Newtonsoft.Json.Formatting.Indented, Serializer._settings);
if (isEncrypt)
{
text = Crypto.Encrypt(text);
}
SafetyFile.Save(text, fn);
}
}
public static string ReadAll(string fn)
{
var fs = SafetyFile.Open(fn);
if (fs == null)
{
return(null);
}
using (var read = new StreamReader(fs, Util.EncodingGb2312))
{
return(read.ReadToEnd());
}
}
private static bool RestoreFromFileWithSize(string fn, string init)
{
try
{
string startWithFn = SafetyFile.GetFilenameStartWith(fn + init);
if (string.IsNullOrEmpty(startWithFn))
{
return(false);
}
SafetyFile.AssertFileSize(startWithFn);
File.Copy(startWithFn, fn);
}
catch
{
return(false);
}
return(true);
}
public static T DeserializeFromFileWithFilename <T>(string fn, bool isEncrypted = true)
{
T t = default(T);
try
{
var text = SafetyFile.ReadAll(fn);
if (!string.IsNullOrEmpty(text))
{
if (isEncrypted)
{
text = Crypto.Decrypt(text);
}
t = JsonConvert.DeserializeObject <T>(text, Serializer._settings);
}
}
catch (Exception e)
{
Log.Exception(e);
}
return(t);
}
public static void Save(Stream stm, string fn)
{
if (File.Exists(fn))
{
var newName = SafetyFile.GetNewName(fn);
SafetyFile.WriteStreamToFile(stm, newName);
SafetyFile.DeleteFilesNameStartWith(newName + "_");
var fi = new FileInfo(newName);
var newSplitFn = newName + "_" + fi.Length;
FileEx.ReName(newName, newSplitFn);
fi = new FileInfo(fn);
string oldName = SafetyFile.GetOldName(fn) + "_";
SafetyFile.DeleteFilesNameStartWith(oldName);
string newfn = oldName + fi.Length;
if (SafetyFile.IsFileStreamWithName(stm, fn))
{
stm.Close();
}
FileEx.ReName(fn, newfn);
SafetyFile.AssertFileSize(newSplitFn);
FileEx.ReName(newSplitFn, fn);
}
else
{
int idx = fn.LastIndexOf('\\');
if (idx > 0)
{
Directory.CreateDirectory(fn.Substring(0, idx));
}
SafetyFile.WriteStreamToFile(stm, fn);
if (SafetyFile.IsFileStreamWithName(stm, fn))
{
stm.Close();
}
}
}
private static bool RestoreFromFileNewSize(string fn)
{
return(SafetyFile.RestoreFromFileWithSize(fn, "_new_"));
}
private static bool RestoreFromFileOldSize(string fn)
{
return(SafetyFile.RestoreFromFileWithSize(fn, "_old_"));
}
