private bool TryGetCacheImageStream(string id, string imageUrl, out Stream outImageStream)
{
id = $"$/{id}";
if (_fileStorage.Exists(id))
{
var file = _fileStorage.FindById(id);
var stream = new MemoryStream((int)file.Length);
try
{
file.CopyTo(stream);
stream.Seek(0, SeekOrigin.Begin);
_fileStorage.SetMetadata(id, new BsonDocument(new Dictionary <string, BsonValue>()
{
{ "updateAt", DateTime.Now }
}));
outImageStream = stream;
return(true);
}
catch
{
stream.Dispose();
throw;
}
}
else
{
outImageStream = null;
return(false);
}
}
public void Storage_ReadWriteStream_Test()
{
var HELLO1 = "Hello World LiteDB 1 ".PadRight(300000, '-') + "\nEND";
var HELLO2 = "Hello World LiteDB 2 - END";
using (var file = new TempFile())
using (var db = new LiteEngine(file.Filename))
{
var sto = new LiteStorage(db);
// insert HELLO1 file content
using (var stream = sto.OpenWrite("f1", "f1.txt"))
{
using (var sw = new StreamWriter(stream))
{
sw.Write(HELLO1);
}
}
// test if was updated Length in _files collection
var doc = db.Find("_files", Query.EQ("_id", "f1")).Single();
Assert.AreEqual(HELLO1.Length, doc["length"].AsInt32);
using (var stream = sto.OpenRead("f1"))
{
var sr = new StreamReader(stream);
var hello = sr.ReadToEnd();
Assert.AreEqual(HELLO1, hello);
}
// updating to HELLO2 content same file id
using (var stream = sto.OpenWrite("f1", "f1.txt"))
{
using (var sw = new StreamWriter(stream))
{
sw.Write(HELLO2);
}
}
using (var stream = sto.OpenRead("f1"))
{
var sr = new StreamReader(stream);
var hello = sr.ReadToEnd();
Assert.AreEqual(HELLO2, hello);
}
// now delete all
sto.Delete("f1");
Assert.IsFalse(sto.Exists("f1"));
}
}
public bool FileExists(string key)
{
return(files.Exists(key));
}
public bool IsFileExisit(string id)
{
return(_storage.Exists(id));
}
