public async Task <IActionResult> GetSmallFileAsync(ControllerBase controller,
LiteDatabase database, string fileId,
HttpClient httpClient, string url,
HashResult hashResult, string fileName = null, ILogger logger = null)
{
logger = logger ?? this._logger;
var file = database.FileStorage.FindById(fileId);
if (file == null)
{
this.HitData.GetFileCache.Miss();
var response = await httpClient.GetOrNullAsync(url, logger);
if (response?.IsSuccessStatusCode != true)
{
var(code, message) = await response.GetErrorInfoAsync();
return(controller.StatusCode(code, message));
}
if (fileName == null)
{
fileName = response.RequestMessage.RequestUri.Segments.Last();
}
byte[] buffer;
try
{
buffer = await response.Content.ReadAsByteArrayAsync();
}
catch (IOException e)
{
logger.LogTrace("GET {} body -> {}", url, e);
return(controller.StatusCode((int)HttpStatusCode.InternalServerError, e.Message));
}
if (!hashResult.Equals(buffer))
{
return(controller.StatusCode((int)HttpStatusCode.InternalServerError, "hashes not matches"));
}
file = database.FileStorage.Upload(fileId, fileName, new MemoryStream(buffer));
}
else
{
this.HitData.GetFileCache.Hit();
}
var downloads = file.Metadata.RawValue.GetValueOrDefault("Downloads", 0) + 1;
if (downloads > 1)
{
logger.LogInformation("Hit file cache: {} ({})", url, downloads);
}
file.Metadata["Downloads"] = downloads;
file.Metadata["LastUsed"] = DateTime.UtcNow;
database.FileStorage.SetMetadata(fileId, file.Metadata);
var stream = file.OpenRead();
controller.Response.RegisterForDispose(stream);
return(controller.File(stream, "binary/octet-stream", file.Filename));
}
