public string ReadFile(string path, string userIdentity)
{
string result = String.Empty;
if (UIDevice.CurrentDevice.CheckSystemVersion(9, 0))
{
if (FileExists(path))
{
NSFileHandle fileHandle = null;
NSError error = null;
Exception exception = null;
try
{
UIApplication.SharedApplication.InvokeOnMainThread(() =>
{
_fileProtectionManagerService.DecryptFile(path);
fileHandle = NSFileHandle.OpenReadUrl(NSUrl.CreateFileUrl(new[] { path }), out error);
if (fileHandle != null)
{
var nsStringResult = NSString.FromData(fileHandle.ReadDataToEndOfFile(), NSStringEncoding.UTF8);
if (nsStringResult != null)
{
result = nsStringResult.ToString();
}
}
_fileProtectionManagerService.EncryptFile(path, userIdentity);
});
}
catch (Exception ex)
{
exception = ex;
}
finally
{
if (fileHandle != null)
{
fileHandle.CloseFile();
}
}
if (error != null)
{
_loggingService.LogError(typeof(FileSystemService), new Exception(error.DebugDescription), error.Description);
throw new NSErrorException(error);
}
else if (exception != null)
{
_loggingService.LogError(typeof(FileSystemService), exception, exception.Message);
throw exception;
}
}
}
return(result);
}
private Stream PlatformGetInputStream(string path)
{
if (FileExists(path))
{
NSFileHandle handle = NSFileHandle.OpenReadUrl(NSUrl.CreateFileUrl(new[] { path }), out NSError error);
if (error != null)
{
throw new NSErrorException(error);
}
else
{
NSData result = handle.ReadDataToEndOfFile();
handle.CloseFile();
return result.AsStream();
}
}
throw new FileNotFoundException();
}
private string PlatformReadFile(string path)
{
if (FileExists(path))
{
NSFileHandle handle = NSFileHandle.OpenReadUrl(NSUrl.CreateFileUrl(new[] { path }), out NSError error);
if (error != null)
{
throw new NSErrorException(error);
}
else
{
NSString result = NSString.FromData(handle.ReadDataToEndOfFile(), NSStringEncoding.UTF8);
handle.CloseFile();
return result?.ToString() ?? "";
}
}
throw new FileNotFoundException();
}
public Stream GetInputStream(string path, string userIdentity)
{
NSFileHandle fileHandle = null;
NSError error = null;
NSData result = null;
Exception exception = null;
try
{
UIApplication.SharedApplication.InvokeOnMainThread(() =>
{
_fileProtectionManagerService.DecryptFile(path);
fileHandle = NSFileHandle.OpenReadUrl(NSUrl.CreateFileUrl(new[] { path }), out error);
result = fileHandle.ReadDataToEndOfFile();
_fileProtectionManagerService.EncryptFile(path, userIdentity);
});
}
catch (Exception ex)
{
exception = ex;
}
finally
{
if (fileHandle != null)
{
fileHandle.CloseFile();
}
}
if (error != null)
{
throw new NSErrorException(error);
}
else if (exception != null)
{
throw exception;
}
return(result?.AsStream() ?? null);
}