/* * 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.IO; using System.Reflection; using System.Xml; using System.Xml.Serialization; using System.Text; using System.Collections.Generic; using log4net; using OpenSim.Framework; using OpenMetaverse; namespace OpenSim.Server.Base { public static class ServerUtils { private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); public static byte[] SerializeResult(XmlSerializer xs, object data) { MemoryStream ms = new MemoryStream(); XmlTextWriter xw = new XmlTextWriter(ms, Util.UTF8); xw.Formatting = Formatting.Indented; xs.Serialize(xw, data); xw.Flush(); ms.Seek(0, SeekOrigin.Begin); byte[] ret = ms.GetBuffer(); Array.Resize(ref ret, (int)ms.Length); return ret; } /// <summary> /// Load a plugin from a dll with the given class or interface /// </summary> /// <param name="dllName"></param> /// <param name="args">The arguments which control which constructor is invoked on the plugin</param> /// <returns></returns> public static T LoadPlugin<T>(string dllName, Object[] args) where T:class { // This is good to debug configuration problems //if (dllName == string.Empty) // Util.PrintCallStack(); string[] parts = dllName.Split(new char[] {':'}); dllName = parts[0]; string className = String.Empty; if (parts.Length > 1) className = parts[1]; return LoadPlugin<T>(dllName, className, args); } /// <summary> /// Load a plugin from a dll with the given class or interface /// </summary> /// <param name="dllName"></param> /// <param name="className"></param> /// <param name="args">The arguments which control which constructor is invoked on the plugin</param> /// <returns></returns> public static T LoadPlugin<T>(string dllName, string className, Object[] args) where T:class { string interfaceName = typeof(T).ToString(); try { Assembly pluginAssembly = Assembly.LoadFrom(dllName); foreach (Type pluginType in pluginAssembly.GetTypes()) { if (pluginType.IsPublic) { if (className != String.Empty && pluginType.ToString() != pluginType.Namespace + "." + className) continue; Type typeInterface = pluginType.GetInterface(interfaceName, true); if (typeInterface != null) { T plug = null; try { plug = (T)Activator.CreateInstance(pluginType, args); } catch (Exception e) { if (!(e is System.MissingMethodException)) { m_log.ErrorFormat("Error loading plugin {0} from {1}. Exception: {2}", interfaceName, dllName, e.InnerException == null ? e.Message : e.InnerException.Message); } return null; } return plug; } } } return null; } catch (ReflectionTypeLoadException rtle) { m_log.Error(string.Format("Error loading plugin from {0}:\n{1}", dllName, String.Join("\n", Array.ConvertAll(rtle.LoaderExceptions, e => e.ToString()))), rtle); return null; } catch (Exception e) { m_log.Error(string.Format("Error loading plugin from {0}", dllName), e); return null; } } public static Dictionary<string, object> ParseQueryString(string query) { Dictionary<string, object> result = new Dictionary<string, object>(); string[] terms = query.Split(new char[] {'&'}); if (terms.Length == 0) return result; foreach (string t in terms) { string[] elems = t.Split(new char[] {'='}); if (elems.Length == 0) continue; string name = System.Web.HttpUtility.UrlDecode(elems[0]); string value = String.Empty; if (elems.Length > 1) value = System.Web.HttpUtility.UrlDecode(elems[1]); if (name.EndsWith("[]")) { string cleanName = name.Substring(0, name.Length - 2); if (result.ContainsKey(cleanName)) { if (!(result[cleanName] is List<string>)) continue; List<string> l = (List<string>)result[cleanName]; l.Add(value); } else { List<string> newList = new List<string>(); newList.Add(value); result[cleanName] = newList; } } else { if (!result.ContainsKey(name)) result[name] = value; } } return result; } public static string BuildQueryString(Dictionary<string, object> data) { string qstring = String.Empty; string part; foreach (KeyValuePair<string, object> kvp in data) { if (kvp.Value is List<string>) { List<string> l = (List<String>)kvp.Value; foreach (string s in l) { part = System.Web.HttpUtility.UrlEncode(kvp.Key) + "[]=" + System.Web.HttpUtility.UrlEncode(s); if (qstring != String.Empty) qstring += "&"; qstring += part; } } else { if (kvp.Value.ToString() != String.Empty) { part = System.Web.HttpUtility.UrlEncode(kvp.Key) + "=" + System.Web.HttpUtility.UrlEncode(kvp.Value.ToString()); } else { part = System.Web.HttpUtility.UrlEncode(kvp.Key); } if (qstring != String.Empty) qstring += "&"; qstring += part; } } return qstring; } public static string BuildXmlResponse(Dictionary<string, object> data) { XmlDocument doc = new XmlDocument(); XmlNode xmlnode = doc.CreateNode(XmlNodeType.XmlDeclaration, "", ""); doc.AppendChild(xmlnode); XmlElement rootElement = doc.CreateElement("", "ServerResponse", ""); doc.AppendChild(rootElement); BuildXmlData(rootElement, data); return doc.InnerXml; } private static void BuildXmlData(XmlElement parent, Dictionary<string, object> data) { foreach (KeyValuePair<string, object> kvp in data) { if (kvp.Value == null) continue; XmlElement elem = parent.OwnerDocument.CreateElement("", XmlConvert.EncodeLocalName(kvp.Key), ""); if (kvp.Value is Dictionary<string, object>) { XmlAttribute type = parent.OwnerDocument.CreateAttribute("", "type", ""); type.Value = "List"; elem.Attributes.Append(type); BuildXmlData(elem, (Dictionary<string, object>)kvp.Value); } else { elem.AppendChild(parent.OwnerDocument.CreateTextNode( kvp.Value.ToString())); } parent.AppendChild(elem); } } public static Dictionary<string, object> ParseXmlResponse(string data) { //m_log.DebugFormat("[XXX]: received xml string: {0}", data); Dictionary<string, object> ret = new Dictionary<string, object>(); XmlDocument doc = new XmlDocument(); doc.LoadXml(data); XmlNodeList rootL = doc.GetElementsByTagName("ServerResponse"); if (rootL.Count != 1) return ret; XmlNode rootNode = rootL[0]; ret = ParseElement(rootNode); return ret; } private static Dictionary<string, object> ParseElement(XmlNode element) { Dictionary<string, object> ret = new Dictionary<string, object>(); XmlNodeList partL = element.ChildNodes; foreach (XmlNode part in partL) { XmlNode type = part.Attributes.GetNamedItem("type"); if (type == null || type.Value != "List") { ret[XmlConvert.DecodeName(part.Name)] = part.InnerText; } else { ret[XmlConvert.DecodeName(part.Name)] = ParseElement(part); } } return ret; } } }