/* * Copyright (c) Contributors, http://opensimulator.org/ * See CONTRIBUTORS.TXT for a full list of copyright holders. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the OpenSimulator Project nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ using System; using System.Collections.Generic; using System.Data; using System.IO; using System.IO.Compression; using System.Reflection; using System.Security.Cryptography; using System.Text; using log4net; using MySql.Data.MySqlClient; using OpenMetaverse; using OpenSim.Framework; using OpenSim.Data; namespace OpenSim.Data.MySQL { public class MySQLXAssetData : AssetDataBase { private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); protected virtual Assembly Assembly { get { return GetType().Assembly; } } private bool m_enableCompression = false; private string m_connectionString; private object m_dbLock = new object(); /// /// We can reuse this for all hashing since all methods are single-threaded through m_dbBLock /// private HashAlgorithm hasher = new SHA256CryptoServiceProvider(); #region IPlugin Members public override string Version { get { return "1.0.0.0"; } } /// /// Initialises Asset interface /// /// /// Loads and initialises the MySQL storage plugin. /// Warns and uses the obsolete mysql_connection.ini if connect string is empty. /// Check for migration /// /// /// /// connect string public override void Initialise(string connect) { m_connectionString = connect; using (MySqlConnection dbcon = new MySqlConnection(m_connectionString)) { dbcon.Open(); Migration m = new Migration(dbcon, Assembly, "XAssetStore"); m.Update(); } } public override void Initialise() { throw new NotImplementedException(); } public override void Dispose() { } /// /// The name of this DB provider /// override public string Name { get { return "MySQL XAsset storage engine"; } } #endregion #region IAssetDataPlugin Members /// /// Fetch Asset from database /// /// Asset UUID to fetch /// Return the asset /// On failure : throw an exception and attempt to reconnect to database override public AssetBase GetAsset(UUID assetID) { // m_log.DebugFormat("[MYSQL XASSET DATA]: Looking for asset {0}", assetID); AssetBase asset = null; lock (m_dbLock) { using (MySqlConnection dbcon = new MySqlConnection(m_connectionString)) { dbcon.Open(); using (MySqlCommand cmd = new MySqlCommand( "SELECT name, description, asset_type, local, temporary, asset_flags, creator_id, data FROM xassetsmeta JOIN xassetsdata ON xassetsmeta.hash = xassetsdata.hash WHERE id=?id", dbcon)) { cmd.Parameters.AddWithValue("?id", assetID.ToString()); try { using (MySqlDataReader dbReader = cmd.ExecuteReader(CommandBehavior.SingleRow)) { if (dbReader.Read()) { asset = new AssetBase(assetID, (string)dbReader["name"], (sbyte)dbReader["asset_type"], dbReader["creator_id"].ToString()); asset.Data = (byte[])dbReader["data"]; asset.Description = (string)dbReader["description"]; string local = dbReader["local"].ToString(); if (local.Equals("1") || local.Equals("true", StringComparison.InvariantCultureIgnoreCase)) asset.Local = true; else asset.Local = false; asset.Temporary = Convert.ToBoolean(dbReader["temporary"]); asset.Flags = (AssetFlags)Convert.ToInt32(dbReader["asset_flags"]); if (m_enableCompression) { using (GZipStream decompressionStream = new GZipStream(new MemoryStream(asset.Data), CompressionMode.Decompress)) { MemoryStream outputStream = new MemoryStream(); WebUtil.CopyTo(decompressionStream, outputStream, int.MaxValue); // int compressedLength = asset.Data.Length; asset.Data = outputStream.ToArray(); // m_log.DebugFormat( // "[XASSET DB]: Decompressed {0} {1} to {2} bytes from {3}", // asset.ID, asset.Name, asset.Data.Length, compressedLength); } } } } } catch (Exception e) { m_log.Error("[MYSQL XASSET DATA]: MySql failure fetching asset " + assetID + ": " + e.Message); } } } } return asset; } /// /// Create an asset in database, or update it if existing. /// /// Asset UUID to create /// On failure : Throw an exception and attempt to reconnect to database override public void StoreAsset(AssetBase asset) { lock (m_dbLock) { using (MySqlConnection dbcon = new MySqlConnection(m_connectionString)) { dbcon.Open(); using (MySqlTransaction transaction = dbcon.BeginTransaction()) { string assetName = asset.Name; if (asset.Name.Length > 64) { assetName = asset.Name.Substring(0, 64); m_log.Warn("[XASSET DB]: Name field truncated from " + asset.Name.Length + " to " + assetName.Length + " characters on add"); } string assetDescription = asset.Description; if (asset.Description.Length > 64) { assetDescription = asset.Description.Substring(0, 64); m_log.Warn("[XASSET DB]: Description field truncated from " + asset.Description.Length + " to " + assetDescription.Length + " characters on add"); } byte[] compressedData; MemoryStream outputStream = new MemoryStream(); if (m_enableCompression) { using (GZipStream compressionStream = new GZipStream(outputStream, CompressionMode.Compress, false)) { // Console.WriteLine(WebUtil.CopyTo(new MemoryStream(asset.Data), compressionStream, int.MaxValue)); // We have to close the compression stream in order to make sure it writes everything out to the underlying memory output stream. compressionStream.Close(); compressedData = outputStream.ToArray(); asset.Data = compressedData; } } byte[] hash = hasher.ComputeHash(asset.Data); // m_log.DebugFormat( // "[XASSET DB]: Compressed data size for {0} {1}, hash {2} is {3}", // asset.ID, asset.Name, hash, compressedData.Length); try { using (MySqlCommand cmd = new MySqlCommand( "replace INTO xassetsmeta(id, hash, name, description, asset_type, local, temporary, create_time, access_time, asset_flags, creator_id)" + "VALUES(?id, ?hash, ?name, ?description, ?asset_type, ?local, ?temporary, ?create_time, ?access_time, ?asset_flags, ?creator_id)", dbcon)) { // create unix epoch time int now = (int)Utils.DateTimeToUnixTime(DateTime.UtcNow); cmd.Parameters.AddWithValue("?id", asset.ID); cmd.Parameters.AddWithValue("?hash", hash); cmd.Parameters.AddWithValue("?name", assetName); cmd.Parameters.AddWithValue("?description", assetDescription); cmd.Parameters.AddWithValue("?asset_type", asset.Type); cmd.Parameters.AddWithValue("?local", asset.Local); cmd.Parameters.AddWithValue("?temporary", asset.Temporary); cmd.Parameters.AddWithValue("?create_time", now); cmd.Parameters.AddWithValue("?access_time", now); cmd.Parameters.AddWithValue("?creator_id", asset.Metadata.CreatorID); cmd.Parameters.AddWithValue("?asset_flags", (int)asset.Flags); cmd.ExecuteNonQuery(); } } catch (Exception e) { m_log.ErrorFormat("[ASSET DB]: MySQL failure creating asset metadata {0} with name \"{1}\". Error: {2}", asset.FullID, asset.Name, e.Message); transaction.Rollback(); return; } if (!ExistsData(dbcon, transaction, hash)) { try { using (MySqlCommand cmd = new MySqlCommand( "INSERT INTO xassetsdata(hash, data) VALUES(?hash, ?data)", dbcon)) { cmd.Parameters.AddWithValue("?hash", hash); cmd.Parameters.AddWithValue("?data", asset.Data); cmd.ExecuteNonQuery(); } } catch (Exception e) { m_log.ErrorFormat("[XASSET DB]: MySQL failure creating asset data {0} with name \"{1}\". Error: {2}", asset.FullID, asset.Name, e.Message); transaction.Rollback(); return; } } transaction.Commit(); } } } } // private void UpdateAccessTime(AssetBase asset) // { // lock (m_dbLock) // { // using (MySqlConnection dbcon = new MySqlConnection(m_connectionString)) // { // dbcon.Open(); // MySqlCommand cmd = // new MySqlCommand("update assets set access_time=?access_time where id=?id", // dbcon); // // // need to ensure we dispose // try // { // using (cmd) // { // // create unix epoch time // int now = (int)Utils.DateTimeToUnixTime(DateTime.UtcNow); // cmd.Parameters.AddWithValue("?id", asset.ID); // cmd.Parameters.AddWithValue("?access_time", now); // cmd.ExecuteNonQuery(); // cmd.Dispose(); // } // } // catch (Exception e) // { // m_log.ErrorFormat( // "[ASSETS DB]: " + // "MySql failure updating access_time for asset {0} with name {1}" + Environment.NewLine + e.ToString() // + Environment.NewLine + "Attempting reconnection", asset.FullID, asset.Name); // } // } // } // // } /// /// We assume we already have the m_dbLock. /// /// TODO: need to actually use the transaction. /// /// /// /// private bool ExistsData(MySqlConnection dbcon, MySqlTransaction transaction, byte[] hash) { // m_log.DebugFormat("[ASSETS DB]: Checking for asset {0}", uuid); bool exists = false; using (MySqlCommand cmd = new MySqlCommand("SELECT hash FROM xassetsdata WHERE hash=?hash", dbcon)) { cmd.Parameters.AddWithValue("?hash", hash); try { using (MySqlDataReader dbReader = cmd.ExecuteReader(CommandBehavior.SingleRow)) { if (dbReader.Read()) { // m_log.DebugFormat("[ASSETS DB]: Found asset {0}", uuid); exists = true; } } } catch (Exception e) { m_log.ErrorFormat( "[XASSETS DB]: MySql failure in ExistsData fetching hash {0}. Exception {1}{2}", hash, e.Message, e.StackTrace); } } return exists; } /// /// Check if the asset exists in the database /// /// The asset UUID /// true if it exists, false otherwise. override public bool ExistsAsset(UUID uuid) { // m_log.DebugFormat("[ASSETS DB]: Checking for asset {0}", uuid); bool assetExists = false; lock (m_dbLock) { using (MySqlConnection dbcon = new MySqlConnection(m_connectionString)) { dbcon.Open(); using (MySqlCommand cmd = new MySqlCommand("SELECT id FROM xassetsmeta WHERE id=?id", dbcon)) { cmd.Parameters.AddWithValue("?id", uuid.ToString()); try { using (MySqlDataReader dbReader = cmd.ExecuteReader(CommandBehavior.SingleRow)) { if (dbReader.Read()) { // m_log.DebugFormat("[ASSETS DB]: Found asset {0}", uuid); assetExists = true; } } } catch (Exception e) { m_log.ErrorFormat( "[XASSETS DB]: MySql failure fetching asset {0}" + Environment.NewLine + e.ToString(), uuid); } } } } return assetExists; } /// /// Returns a list of AssetMetadata objects. The list is a subset of /// the entire data set offset by containing /// elements. /// /// The number of results to discard from the total data set. /// The number of rows the returned list should contain. /// A list of AssetMetadata objects. public override List FetchAssetMetadataSet(int start, int count) { List retList = new List(count); lock (m_dbLock) { using (MySqlConnection dbcon = new MySqlConnection(m_connectionString)) { dbcon.Open(); MySqlCommand cmd = new MySqlCommand("SELECT name,description,asset_type,temporary,id,asset_flags,creator_id FROM xassetsmeta LIMIT ?start, ?count", dbcon); cmd.Parameters.AddWithValue("?start", start); cmd.Parameters.AddWithValue("?count", count); try { using (MySqlDataReader dbReader = cmd.ExecuteReader()) { while (dbReader.Read()) { AssetMetadata metadata = new AssetMetadata(); metadata.Name = (string)dbReader["name"]; metadata.Description = (string)dbReader["description"]; metadata.Type = (sbyte)dbReader["asset_type"]; metadata.Temporary = Convert.ToBoolean(dbReader["temporary"]); // Not sure if this is correct. metadata.Flags = (AssetFlags)Convert.ToInt32(dbReader["asset_flags"]); metadata.FullID = DBGuid.FromDB(dbReader["id"]); metadata.CreatorID = dbReader["creator_id"].ToString(); // We'll ignore this for now - it appears unused! // metadata.SHA1 = dbReader["hash"]); retList.Add(metadata); } } } catch (Exception e) { m_log.Error("[XASSETS DB]: MySql failure fetching asset set" + Environment.NewLine + e.ToString()); } } } return retList; } public override bool Delete(string id) { // m_log.DebugFormat("[XASSETS DB]: Deleting asset {0}", id); lock (m_dbLock) { using (MySqlConnection dbcon = new MySqlConnection(m_connectionString)) { dbcon.Open(); using (MySqlCommand cmd = new MySqlCommand("delete from xassetsmeta where id=?id", dbcon)) { cmd.Parameters.AddWithValue("?id", id); cmd.ExecuteNonQuery(); } // TODO: How do we deal with data from deleted assets? Probably not easily reapable unless we // keep a reference count (?) } } return true; } #endregion } }