/* * 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 OpenMetaverse; using OpenSim.Framework; using OpenSim.Data; using Npgsql; namespace OpenSim.Data.PGSQL { public class PGSQLXAssetData : IXAssetDataPlugin { private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); protected virtual Assembly Assembly { get { return GetType().Assembly; } } /// /// Number of days that must pass before we update the access time on an asset when it has been fetched. /// private const int DaysBetweenAccessTimeUpdates = 30; private bool m_enableCompression = false; private PGSQLManager m_database; 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 string Version { get { return "1.0.0.0"; } } /// /// Initialises Asset interface /// /// /// Loads and initialises the PGSQL storage plugin. /// Warns and uses the obsolete pgsql_connection.ini if connect string is empty. /// Check for migration /// /// /// /// connect string public void Initialise(string connect) { m_log.ErrorFormat("[PGSQL XASSETDATA]: ***********************************************************"); m_log.ErrorFormat("[PGSQL XASSETDATA]: ***********************************************************"); m_log.ErrorFormat("[PGSQL XASSETDATA]: ***********************************************************"); m_log.ErrorFormat("[PGSQL XASSETDATA]: THIS PLUGIN IS STRICTLY EXPERIMENTAL."); m_log.ErrorFormat("[PGSQL XASSETDATA]: DO NOT USE FOR ANY DATA THAT YOU DO NOT MIND LOSING."); m_log.ErrorFormat("[PGSQL XASSETDATA]: DATABASE TABLES CAN CHANGE AT ANY TIME, CAUSING EXISTING DATA TO BE LOST."); m_log.ErrorFormat("[PGSQL XASSETDATA]: ***********************************************************"); m_log.ErrorFormat("[PGSQL XASSETDATA]: ***********************************************************"); m_log.ErrorFormat("[PGSQL XASSETDATA]: ***********************************************************"); m_connectionString = connect; m_database = new PGSQLManager(m_connectionString); using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString)) { dbcon.Open(); Migration m = new Migration(dbcon, Assembly, "XAssetStore"); m.Update(); } } public void Initialise() { throw new NotImplementedException(); } public void Dispose() { } /// /// The name of this DB provider /// public string Name { get { return "PGSQL 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 public AssetBase GetAsset(UUID assetID) { // m_log.DebugFormat("[PGSQL XASSET DATA]: Looking for asset {0}", assetID); AssetBase asset = null; lock (m_dbLock) { using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString)) { dbcon.Open(); using (NpgsqlCommand cmd = new NpgsqlCommand( @"SELECT name, description, access_time, ""AssetType"", local, temporary, asset_flags, creatorid, data FROM XAssetsMeta JOIN XAssetsData ON XAssetsMeta.hash = XAssetsData.Hash WHERE id=:ID", dbcon)) { cmd.Parameters.Add(m_database.CreateParameter("ID", assetID)); try { using (NpgsqlDataReader dbReader = cmd.ExecuteReader(CommandBehavior.SingleRow)) { if (dbReader.Read()) { asset = new AssetBase( assetID, (string)dbReader["name"], Convert.ToSByte(dbReader["AssetType"]), dbReader["creatorid"].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.CopyStream(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); } } UpdateAccessTime(asset.Metadata, (int)dbReader["access_time"]); } } } catch (Exception e) { m_log.Error(string.Format("[PGSQL XASSET DATA]: Failure fetching asset {0}", assetID), e); } } } } 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 public void StoreAsset(AssetBase asset) { // m_log.DebugFormat("[XASSETS DB]: Storing asset {0} {1}", asset.Name, asset.ID); lock (m_dbLock) { using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString)) { dbcon.Open(); using (NpgsqlTransaction transaction = dbcon.BeginTransaction()) { string assetName = asset.Name; if (asset.Name.Length > 64) { assetName = asset.Name.Substring(0, 64); m_log.WarnFormat( "[XASSET DB]: Name '{0}' for asset {1} truncated from {2} to {3} characters on add", asset.Name, asset.ID, asset.Name.Length, assetName.Length); } string assetDescription = asset.Description; if (asset.Description.Length > 64) { assetDescription = asset.Description.Substring(0, 64); m_log.WarnFormat( "[XASSET DB]: Description '{0}' for asset {1} truncated from {2} to {3} characters on add", asset.Description, asset.ID, asset.Description.Length, assetDescription.Length); } if (m_enableCompression) { MemoryStream outputStream = new MemoryStream(); 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(); byte[] compressedData = outputStream.ToArray(); asset.Data = compressedData; } } byte[] hash = hasher.ComputeHash(asset.Data); UUID asset_id; UUID.TryParse(asset.ID, out asset_id); // m_log.DebugFormat( // "[XASSET DB]: Compressed data size for {0} {1}, hash {2} is {3}", // asset.ID, asset.Name, hash, compressedData.Length); try { using (NpgsqlCommand cmd = new NpgsqlCommand( @"insert INTO XAssetsMeta(id, hash, name, description, ""AssetType"", local, temporary, create_time, access_time, asset_flags, creatorid) Select :ID, :Hash, :Name, :Description, :AssetType, :Local, :Temporary, :CreateTime, :AccessTime, :AssetFlags, :CreatorID where not exists( Select id from XAssetsMeta where id = :ID); update XAssetsMeta set id = :ID, hash = :Hash, name = :Name, description = :Description, ""AssetType"" = :AssetType, local = :Local, temporary = :Temporary, create_time = :CreateTime, access_time = :AccessTime, asset_flags = :AssetFlags, creatorid = :CreatorID where id = :ID; ", dbcon)) { // create unix epoch time int now = (int)Utils.DateTimeToUnixTime(DateTime.UtcNow); cmd.Parameters.Add(m_database.CreateParameter("ID", asset_id)); cmd.Parameters.Add(m_database.CreateParameter("Hash", hash)); cmd.Parameters.Add(m_database.CreateParameter("Name", assetName)); cmd.Parameters.Add(m_database.CreateParameter("Description", assetDescription)); cmd.Parameters.Add(m_database.CreateParameter("AssetType", asset.Type)); cmd.Parameters.Add(m_database.CreateParameter("Local", asset.Local)); cmd.Parameters.Add(m_database.CreateParameter("Temporary", asset.Temporary)); cmd.Parameters.Add(m_database.CreateParameter("CreateTime", now)); cmd.Parameters.Add(m_database.CreateParameter("AccessTime", now)); cmd.Parameters.Add(m_database.CreateParameter("CreatorID", asset.Metadata.CreatorID)); cmd.Parameters.Add(m_database.CreateParameter("AssetFlags", (int)asset.Flags)); cmd.ExecuteNonQuery(); } } catch (Exception e) { m_log.ErrorFormat("[ASSET DB]: PGSQL 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 (NpgsqlCommand cmd = new NpgsqlCommand( @"INSERT INTO XAssetsData(hash, data) VALUES(:Hash, :Data)", dbcon)) { cmd.Parameters.Add(m_database.CreateParameter("Hash", hash)); cmd.Parameters.Add(m_database.CreateParameter("Data", asset.Data)); cmd.ExecuteNonQuery(); } } catch (Exception e) { m_log.ErrorFormat("[XASSET DB]: PGSQL failure creating asset data {0} with name \"{1}\". Error: {2}", asset.FullID, asset.Name, e.Message); transaction.Rollback(); return; } } transaction.Commit(); } } } } /// /// Updates the access time of the asset if it was accessed above a given threshhold amount of time. /// /// /// This gives us some insight into assets which haven't ben accessed for a long period. This is only done /// over the threshold time to avoid excessive database writes as assets are fetched. /// /// /// private void UpdateAccessTime(AssetMetadata assetMetadata, int accessTime) { DateTime now = DateTime.UtcNow; if ((now - Utils.UnixTimeToDateTime(accessTime)).TotalDays < DaysBetweenAccessTimeUpdates) return; lock (m_dbLock) { using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString)) { dbcon.Open(); NpgsqlCommand cmd = new NpgsqlCommand(@"update XAssetsMeta set access_time=:AccessTime where id=:ID", dbcon); try { UUID asset_id; UUID.TryParse(assetMetadata.ID, out asset_id); using (cmd) { // create unix epoch time cmd.Parameters.Add(m_database.CreateParameter("id", asset_id)); cmd.Parameters.Add(m_database.CreateParameter("access_time", (int)Utils.DateTimeToUnixTime(now))); cmd.ExecuteNonQuery(); } } catch (Exception e) { m_log.ErrorFormat( "[XASSET PGSQL DB]: Failure updating access_time for asset {0} with name {1} : {2}", assetMetadata.ID, assetMetadata.Name, e.Message); } } } } /// /// We assume we already have the m_dbLock. /// /// TODO: need to actually use the transaction. /// /// /// /// private bool ExistsData(NpgsqlConnection dbcon, NpgsqlTransaction transaction, byte[] hash) { // m_log.DebugFormat("[ASSETS DB]: Checking for asset {0}", uuid); bool exists = false; using (NpgsqlCommand cmd = new NpgsqlCommand(@"SELECT hash FROM XAssetsData WHERE hash=:Hash", dbcon)) { cmd.Parameters.Add(m_database.CreateParameter("Hash", hash)); try { using (NpgsqlDataReader 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]: PGSql failure in ExistsData fetching hash {0}. Exception {1}{2}", hash, e.Message, e.StackTrace); } } return exists; } /// /// Check if the assets exist in the database. /// /// The assets' IDs /// For each asset: true if it exists, false otherwise public bool[] AssetsExist(UUID[] uuids) { if (uuids.Length == 0) return new bool[0]; HashSet exist = new HashSet(); string ids = "'" + string.Join("','", uuids) + "'"; string sql = string.Format(@"SELECT id FROM XAssetsMeta WHERE id IN ({0})", ids); using (NpgsqlConnection conn = new NpgsqlConnection(m_connectionString)) { conn.Open(); using (NpgsqlCommand cmd = new NpgsqlCommand(sql, conn)) { using (NpgsqlDataReader reader = cmd.ExecuteReader()) { while (reader.Read()) { UUID id = DBGuid.FromDB(reader["id"]); exist.Add(id); } } } } bool[] results = new bool[uuids.Length]; for (int i = 0; i < uuids.Length; i++) results[i] = exist.Contains(uuids[i]); return results; } /// /// Check if the asset exists in the database /// /// The asset UUID /// true if it exists, false otherwise. public bool ExistsAsset(UUID uuid) { // m_log.DebugFormat("[ASSETS DB]: Checking for asset {0}", uuid); bool assetExists = false; lock (m_dbLock) { using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString)) { dbcon.Open(); using (NpgsqlCommand cmd = new NpgsqlCommand(@"SELECT id FROM XAssetsMeta WHERE id=:ID", dbcon)) { cmd.Parameters.Add(m_database.CreateParameter("id", uuid)); try { using (NpgsqlDataReader dbReader = cmd.ExecuteReader(CommandBehavior.SingleRow)) { if (dbReader.Read()) { // m_log.DebugFormat("[ASSETS DB]: Found asset {0}", uuid); assetExists = true; } } } catch (Exception e) { m_log.Error(string.Format("[XASSETS DB]: PGSql failure fetching asset {0}", uuid), e); } } } } 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 List FetchAssetMetadataSet(int start, int count) { List retList = new List(count); lock (m_dbLock) { using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString)) { dbcon.Open(); NpgsqlCommand cmd = new NpgsqlCommand( @"SELECT name, description, access_time, ""AssetType"", temporary, id, asset_flags, creatorid FROM XAssetsMeta LIMIT :start, :count", dbcon); cmd.Parameters.Add(m_database.CreateParameter("start", start)); cmd.Parameters.Add(m_database.CreateParameter("count", count)); try { using (NpgsqlDataReader dbReader = cmd.ExecuteReader()) { while (dbReader.Read()) { AssetMetadata metadata = new AssetMetadata(); metadata.Name = (string)dbReader["name"]; metadata.Description = (string)dbReader["description"]; metadata.Type = Convert.ToSByte(dbReader["AssetType"]); metadata.Temporary = Convert.ToBoolean(dbReader["temporary"]); metadata.Flags = (AssetFlags)Convert.ToInt32(dbReader["asset_flags"]); metadata.FullID = DBGuid.FromDB(dbReader["id"]); metadata.CreatorID = dbReader["creatorid"].ToString(); // We'll ignore this for now - it appears unused! // metadata.SHA1 = dbReader["hash"]); UpdateAccessTime(metadata, (int)dbReader["access_time"]); retList.Add(metadata); } } } catch (Exception e) { m_log.Error("[XASSETS DB]: PGSql failure fetching asset set" + Environment.NewLine + e.ToString()); } } } return retList; } public bool Delete(string id) { // m_log.DebugFormat("[XASSETS DB]: Deleting asset {0}", id); lock (m_dbLock) { using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString)) { dbcon.Open(); using (NpgsqlCommand cmd = new NpgsqlCommand(@"delete from XAssetsMeta where id=:ID", dbcon)) { cmd.Parameters.Add(m_database.CreateParameter(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 } }