public FileCacheResult Get(string key)
{
_logger.LogTrace($"Fetching key \"{key}\" from cache.");
if (_fileCache.TryGetValue(key, out FileData val))
{
return(val);
}
_logger.LogWarning($"Cache miss on key \"{key}\".");
return(FileCacheResult.Empty());
}
public FileFetchResult GetFileContent(string fileName)
{
_logger.LogTrace($"Getting markdown content for \"{fileName}\".");
// If source directory missing, not found.
if (_options.MDSSourceDirectory == null || !_ioProxy.DirectoryExists(_options.MDSSourceDirectory))
{
_logger.LogWarning("Markdown Source directory is not configured or does not exist!");
return(FileFetchResult.Notfound());
}
string fileNameWithExtension = fileName + _options.MDSFileExtension;
string filePath = Path.Combine(_options.MDSSourceDirectory, fileNameWithExtension);
// Ensure file exists
if (!_ioProxy.FileExists(filePath))
{
return(FileFetchResult.Notfound());
}
DateTime lastModified = _ioProxy.GetLastWriteTimeUtc(filePath);
// Cached and valid.
if (_fileCacheService.HasKey(fileName))
{
_logger.LogTrace("File is cached. Comparing modified dates.");
FileCacheResult cacheResult = _fileCacheService.Get(fileName);
if (cacheResult.HasValue && cacheResult.FileData.LastModifiedUtc == lastModified)
{
_logger.LogTrace("File has not been modified. Reading content from cache.");
return(new FileFetchResult(cacheResult.FileData));
}
}
// Cache for first time or refresh.
_logger.LogTrace($"Caching file from '{filePath}'.");
string content = _ioProxy.ReadAllText(filePath);
_fileCacheService.Put(fileName, content, lastModified);
var fileData = new FileData
{
Content = content,
LastModifiedUtc = lastModified
};
return(new FileFetchResult(fileData));
}
