/// <inheritdoc />
public IEnumerable <FileInfo> EnumerateFiles(AbsolutePath path, EnumerateOptions options)
{
path.ThrowIfPathTooLong();
var dirInfo = new DirectoryInfo(path.Path);
foreach (System.IO.FileInfo fi in dirInfo.EnumerateFiles(
"*",
(options & EnumerateOptions.Recurse) != 0 ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly))
{
bool foundValidFile = false;
FileInfo newFi = default(FileInfo);
try
{
newFi = new FileInfo {
FullPath = new AbsolutePath(fi.FullName), Length = fi.Length
};
foundValidFile = true;
}
catch (FileNotFoundException)
{
// Ignore FileNotFoundException here. EnumerateFiles returns a cached FileInfo and does not validate
// whether the underlying file exists. Calling Length on this FileInfo for the first time prompts it to
// refresh its properties/fields, leading to a FileNotFoundException if the file no longer exists.
}
if (foundValidFile)
{
yield return(newFi);
}
}
}
private async Task <(bool isValid, string error)> ValidateFileAsync(Context context, ContentHash expectedHash, FileInfo fileInfo)
{
try
{
var path = fileInfo.FullPath;
// The cache entry is invalid if the size in content directory doesn't mach an actual size
if (_contentStoreInternal.TryGetFileInfo(expectedHash, out var contentFileInfo) && contentFileInfo.FileSize != fileInfo.Length)
{
return(isValid : false, error : $"File size mismatch. Expected size is {contentFileInfo.FileSize} and size on disk is {fileInfo.Length}.");
}
// Or if the content doesn't match the hash.
var actualHashAndSize = await _contentStoreInternal.TryHashFileAsync(context, path, expectedHash.HashType);
if (actualHashAndSize != null && actualHashAndSize.Value.Hash != expectedHash)
{
// Don't need to add an expected hash into the error string because the client code will always put it into the final error message.
return(isValid : false, error : $"Hash mismatch. Actual hash is {actualHashAndSize.Value.Hash.ToShortString()}");
}
return(isValid : true, error : string.Empty);
}
catch (Exception e)
{
_tracer.Warning(context, $"SelfCheck: Content hash is invalid. Hash={expectedHash.ToShortString()}, Error={e}");
return(isValid : true, error : string.Empty);
}
}
