81e6342d36
git-svn-id: http://libopenmetaverse.googlecode.com/svn/trunk@1998 52acb1d6-8a22-11de-b505-999d5b087335
641 lines
22 KiB
C#
641 lines
22 KiB
C#
/*
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* Copyright (c) 2007-2008, openmetaverse.org
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* All rights reserved.
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*
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* - Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* - Neither the name of the openmetaverse.org nor the names
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* of its contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Xml;
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using System.Xml.Schema;
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using System.Text;
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namespace OpenMetaverse.StructuredData
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{
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/// <summary>
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///
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/// </summary>
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public static partial class LLSDParser
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{
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private static XmlSchema XmlSchema;
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private static XmlTextReader XmlTextReader;
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private static string LastXmlErrors = String.Empty;
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private static object XmlValidationLock = new object();
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/// <summary>
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///
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/// </summary>
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/// <param name="xmlData"></param>
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/// <returns></returns>
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public static LLSD DeserializeXml(byte[] xmlData)
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{
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return DeserializeXml(new XmlTextReader(new MemoryStream(xmlData, false)));
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="xmlData"></param>
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/// <returns></returns>
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public static LLSD DeserializeXml(string xmlData)
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{
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byte[] bytes = Helpers.StringToField(xmlData);
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return DeserializeXml(new XmlTextReader(new MemoryStream(bytes, false)));
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="xmlData"></param>
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/// <returns></returns>
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public static LLSD DeserializeXml(XmlTextReader xmlData)
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{
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xmlData.Read();
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SkipWhitespace(xmlData);
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xmlData.Read();
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LLSD ret = ParseXmlElement(xmlData);
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return ret;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="data"></param>
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/// <returns></returns>
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public static byte[] SerializeXmlBytes(LLSD data)
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{
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return Encoding.UTF8.GetBytes(SerializeXmlString(data));
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="data"></param>
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/// <returns></returns>
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public static string SerializeXmlString(LLSD data)
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{
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StringWriter sw = new StringWriter();
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XmlTextWriter writer = new XmlTextWriter(sw);
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writer.Formatting = Formatting.None;
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writer.WriteStartElement(String.Empty, "llsd", String.Empty);
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SerializeXmlElement(writer, data);
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writer.WriteEndElement();
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writer.Close();
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return sw.ToString();
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="writer"></param>
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/// <param name="data"></param>
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public static void SerializeXmlElement(XmlTextWriter writer, LLSD data)
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{
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switch (data.Type)
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{
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case LLSDType.Unknown:
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writer.WriteStartElement(String.Empty, "undef", String.Empty);
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writer.WriteEndElement();
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break;
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case LLSDType.Boolean:
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writer.WriteStartElement(String.Empty, "boolean", String.Empty);
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writer.WriteString(data.AsString());
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writer.WriteEndElement();
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break;
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case LLSDType.Integer:
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writer.WriteStartElement(String.Empty, "integer", String.Empty);
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writer.WriteString(data.AsString());
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writer.WriteEndElement();
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break;
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case LLSDType.Real:
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writer.WriteStartElement(String.Empty, "real", String.Empty);
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writer.WriteString(data.AsString());
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writer.WriteEndElement();
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break;
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case LLSDType.String:
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writer.WriteStartElement(String.Empty, "string", String.Empty);
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writer.WriteString(data.AsString());
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writer.WriteEndElement();
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break;
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case LLSDType.UUID:
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writer.WriteStartElement(String.Empty, "uuid", String.Empty);
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writer.WriteString(data.AsString());
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writer.WriteEndElement();
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break;
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case LLSDType.Date:
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writer.WriteStartElement(String.Empty, "date", String.Empty);
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writer.WriteString(data.AsString());
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writer.WriteEndElement();
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break;
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case LLSDType.URI:
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writer.WriteStartElement(String.Empty, "uri", String.Empty);
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writer.WriteString(data.AsString());
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writer.WriteEndElement();
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break;
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case LLSDType.Binary:
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writer.WriteStartElement(String.Empty, "binary", String.Empty);
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writer.WriteStartAttribute(String.Empty, "encoding", String.Empty);
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writer.WriteString("base64");
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writer.WriteEndAttribute();
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writer.WriteString(data.AsString());
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writer.WriteEndElement();
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break;
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case LLSDType.Map:
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LLSDMap map = (LLSDMap)data;
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writer.WriteStartElement(String.Empty, "map", String.Empty);
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foreach (KeyValuePair<string, LLSD> kvp in map)
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{
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writer.WriteStartElement(String.Empty, "key", String.Empty);
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writer.WriteString(kvp.Key);
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writer.WriteEndElement();
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SerializeXmlElement(writer, kvp.Value);
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}
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writer.WriteEndElement();
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break;
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case LLSDType.Array:
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LLSDArray array = (LLSDArray)data;
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writer.WriteStartElement(String.Empty, "array", String.Empty);
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for (int i = 0; i < array.Count; i++)
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{
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SerializeXmlElement(writer, array[i]);
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}
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writer.WriteEndElement();
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break;
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}
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="xmlData"></param>
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/// <param name="error"></param>
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/// <returns></returns>
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public static bool TryValidate(XmlTextReader xmlData, out string error)
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{
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lock (XmlValidationLock)
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{
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LastXmlErrors = String.Empty;
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XmlTextReader = xmlData;
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CreateSchema();
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XmlReaderSettings readerSettings = new XmlReaderSettings();
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readerSettings.ValidationType = ValidationType.Schema;
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readerSettings.Schemas.Add(XmlSchema);
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readerSettings.ValidationEventHandler += new ValidationEventHandler(SchemaValidationHandler);
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XmlReader reader = XmlReader.Create(xmlData, readerSettings);
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try
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{
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while (reader.Read()) { }
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}
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catch (XmlException)
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{
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error = LastXmlErrors;
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return false;
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}
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if (LastXmlErrors == String.Empty)
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{
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error = null;
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return true;
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}
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else
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{
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error = LastXmlErrors;
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return false;
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}
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}
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="reader"></param>
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/// <returns></returns>
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private static LLSD ParseXmlElement(XmlTextReader reader)
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{
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SkipWhitespace(reader);
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if (reader.NodeType != XmlNodeType.Element)
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throw new LLSDException("Expected an element");
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string type = reader.LocalName;
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LLSD ret;
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switch (type)
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{
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case "undef":
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if (reader.IsEmptyElement)
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{
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reader.Read();
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return new LLSD();
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}
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reader.Read();
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SkipWhitespace(reader);
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ret = new LLSD();
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break;
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case "boolean":
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if (reader.IsEmptyElement)
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{
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reader.Read();
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return LLSD.FromBoolean(false);
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}
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if (reader.Read())
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{
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string s = reader.ReadString().Trim();
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if (!String.IsNullOrEmpty(s) && (s == "true" || s == "1"))
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{
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ret = LLSD.FromBoolean(true);
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break;
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}
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}
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ret = LLSD.FromBoolean(false);
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break;
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case "integer":
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if (reader.IsEmptyElement)
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{
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reader.Read();
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return LLSD.FromInteger(0);
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}
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if (reader.Read())
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{
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int value = 0;
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Helpers.TryParse(reader.ReadString().Trim(), out value);
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ret = LLSD.FromInteger(value);
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break;
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}
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ret = LLSD.FromInteger(0);
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break;
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case "real":
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if (reader.IsEmptyElement)
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{
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reader.Read();
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return LLSD.FromReal(0d);
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}
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if (reader.Read())
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{
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double value = 0d;
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string str = reader.ReadString().Trim().ToLower();
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if (str == "nan")
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value = Double.NaN;
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else
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Helpers.TryParse(str, out value);
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ret = LLSD.FromReal(value);
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break;
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}
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ret = LLSD.FromReal(0d);
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break;
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case "uuid":
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if (reader.IsEmptyElement)
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{
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reader.Read();
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return LLSD.FromUUID(UUID.Zero);
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}
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if (reader.Read())
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{
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UUID value = UUID.Zero;
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UUID.TryParse(reader.ReadString().Trim(), out value);
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ret = LLSD.FromUUID(value);
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break;
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}
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ret = LLSD.FromUUID(UUID.Zero);
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break;
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case "date":
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if (reader.IsEmptyElement)
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{
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reader.Read();
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return LLSD.FromDate(Helpers.Epoch);
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}
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if (reader.Read())
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{
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DateTime value = Helpers.Epoch;
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Helpers.TryParse(reader.ReadString().Trim(), out value);
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ret = LLSD.FromDate(value);
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break;
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}
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ret = LLSD.FromDate(Helpers.Epoch);
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break;
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case "string":
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if (reader.IsEmptyElement)
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{
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reader.Read();
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return LLSD.FromString(String.Empty);
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}
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if (reader.Read())
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{
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ret = LLSD.FromString(reader.ReadString());
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break;
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}
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ret = LLSD.FromString(String.Empty);
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break;
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case "binary":
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if (reader.IsEmptyElement)
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{
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reader.Read();
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return LLSD.FromBinary(new byte[0]);
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}
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if (reader.GetAttribute("encoding") != null && reader.GetAttribute("encoding") != "base64")
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throw new LLSDException("Unsupported binary encoding: " + reader.GetAttribute("encoding"));
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if (reader.Read())
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{
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try
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{
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ret = LLSD.FromBinary(Convert.FromBase64String(reader.ReadString().Trim()));
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break;
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}
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catch (FormatException ex)
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{
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throw new LLSDException("Binary decoding exception: " + ex.Message);
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}
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}
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ret = LLSD.FromBinary(new byte[0]);
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break;
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case "uri":
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if (reader.IsEmptyElement)
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{
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reader.Read();
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return LLSD.FromUri(new Uri(String.Empty, UriKind.RelativeOrAbsolute));
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}
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if (reader.Read())
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{
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ret = LLSD.FromUri(new Uri(reader.ReadString(), UriKind.RelativeOrAbsolute));
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break;
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}
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ret = LLSD.FromUri(new Uri(String.Empty, UriKind.RelativeOrAbsolute));
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break;
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case "map":
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return ParseXmlMap(reader);
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case "array":
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return ParseXmlArray(reader);
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default:
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reader.Read();
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ret = null;
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break;
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}
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if (reader.NodeType != XmlNodeType.EndElement || reader.LocalName != type)
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{
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throw new LLSDException("Expected </" + type + ">");
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}
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else
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{
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reader.Read();
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return ret;
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}
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}
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private static LLSDMap ParseXmlMap(XmlTextReader reader)
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{
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if (reader.NodeType != XmlNodeType.Element || reader.LocalName != "map")
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throw new NotImplementedException("Expected <map>");
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LLSDMap map = new LLSDMap();
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if (reader.IsEmptyElement)
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{
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reader.Read();
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return map;
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}
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if (reader.Read())
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{
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while (true)
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{
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SkipWhitespace(reader);
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if (reader.NodeType == XmlNodeType.EndElement && reader.LocalName == "map")
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{
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reader.Read();
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break;
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}
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if (reader.NodeType != XmlNodeType.Element || reader.LocalName != "key")
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throw new LLSDException("Expected <key>");
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string key = reader.ReadString();
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if (reader.NodeType != XmlNodeType.EndElement || reader.LocalName != "key")
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throw new LLSDException("Expected </key>");
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if (reader.Read())
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map[key] = ParseXmlElement(reader);
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else
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throw new LLSDException("Failed to parse a value for key " + key);
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}
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}
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return map;
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}
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private static LLSDArray ParseXmlArray(XmlTextReader reader)
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{
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if (reader.NodeType != XmlNodeType.Element || reader.LocalName != "array")
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throw new LLSDException("Expected <array>");
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LLSDArray array = new LLSDArray();
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if (reader.IsEmptyElement)
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{
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reader.Read();
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return array;
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}
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if (reader.Read())
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{
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while (true)
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{
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SkipWhitespace(reader);
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if (reader.NodeType == XmlNodeType.EndElement && reader.LocalName == "array")
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{
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reader.Read();
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break;
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}
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array.Add(ParseXmlElement(reader));
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}
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}
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return array;
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}
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private static void SkipWhitespace(XmlTextReader reader)
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{
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while (
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reader.NodeType == XmlNodeType.Comment ||
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reader.NodeType == XmlNodeType.Whitespace ||
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reader.NodeType == XmlNodeType.SignificantWhitespace ||
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reader.NodeType == XmlNodeType.XmlDeclaration)
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{
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reader.Read();
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}
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}
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private static void CreateSchema()
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{
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if (XmlSchema == null)
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{
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#region XSD
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string schemaText = @"
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<?xml version=""1.0"" encoding=""utf-8""?>
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<xs:schema elementFormDefault=""qualified"" xmlns:xs=""http://www.w3.org/2001/XMLSchema"">
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<xs:import schemaLocation=""xml.xsd"" namespace=""http://www.w3.org/XML/1998/namespace"" />
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<xs:element name=""uri"" type=""xs:string"" />
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<xs:element name=""uuid"" type=""xs:string"" />
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<xs:element name=""KEYDATA"">
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<xs:complexType>
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<xs:sequence>
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<xs:element ref=""key"" />
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<xs:element ref=""DATA"" />
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</xs:sequence>
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</xs:complexType>
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</xs:element>
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<xs:element name=""date"" type=""xs:string"" />
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<xs:element name=""key"" type=""xs:string"" />
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<xs:element name=""boolean"" type=""xs:string"" />
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<xs:element name=""undef"">
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<xs:complexType>
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<xs:sequence>
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<xs:element ref=""EMPTY"" />
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</xs:sequence>
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</xs:complexType>
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</xs:element>
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<xs:element name=""map"">
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<xs:complexType>
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<xs:sequence>
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<xs:element minOccurs=""0"" maxOccurs=""unbounded"" ref=""KEYDATA"" />
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</xs:sequence>
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</xs:complexType>
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</xs:element>
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<xs:element name=""real"" type=""xs:string"" />
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<xs:element name=""ATOMIC"">
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<xs:complexType>
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<xs:choice>
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<xs:element ref=""undef"" />
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<xs:element ref=""boolean"" />
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<xs:element ref=""integer"" />
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<xs:element ref=""real"" />
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<xs:element ref=""uuid"" />
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<xs:element ref=""string"" />
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<xs:element ref=""date"" />
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<xs:element ref=""uri"" />
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<xs:element ref=""binary"" />
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</xs:choice>
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</xs:complexType>
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</xs:element>
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<xs:element name=""DATA"">
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<xs:complexType>
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<xs:choice>
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<xs:element ref=""ATOMIC"" />
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<xs:element ref=""map"" />
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<xs:element ref=""array"" />
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</xs:choice>
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</xs:complexType>
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</xs:element>
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<xs:element name=""llsd"">
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<xs:complexType>
|
|
<xs:sequence>
|
|
<xs:element ref=""DATA"" />
|
|
</xs:sequence>
|
|
</xs:complexType>
|
|
</xs:element>
|
|
<xs:element name=""binary"">
|
|
<xs:complexType>
|
|
<xs:simpleContent>
|
|
<xs:extension base=""xs:string"">
|
|
<xs:attribute default=""base64"" name=""encoding"" type=""xs:string"" />
|
|
</xs:extension>
|
|
</xs:simpleContent>
|
|
</xs:complexType>
|
|
</xs:element>
|
|
<xs:element name=""array"">
|
|
<xs:complexType>
|
|
<xs:sequence>
|
|
<xs:element minOccurs=""0"" maxOccurs=""unbounded"" ref=""DATA"" />
|
|
</xs:sequence>
|
|
</xs:complexType>
|
|
</xs:element>
|
|
<xs:element name=""integer"" type=""xs:string"" />
|
|
<xs:element name=""string"">
|
|
<xs:complexType>
|
|
<xs:simpleContent>
|
|
<xs:extension base=""xs:string"">
|
|
<xs:attribute ref=""xml:space"" />
|
|
</xs:extension>
|
|
</xs:simpleContent>
|
|
</xs:complexType>
|
|
</xs:element>
|
|
</xs:schema>
|
|
";
|
|
#endregion XSD
|
|
|
|
MemoryStream stream = new MemoryStream(Encoding.ASCII.GetBytes(schemaText));
|
|
|
|
XmlSchema = new XmlSchema();
|
|
XmlSchema = XmlSchema.Read(stream, new ValidationEventHandler(SchemaValidationHandler));
|
|
}
|
|
}
|
|
|
|
private static void SchemaValidationHandler(object sender, ValidationEventArgs args)
|
|
{
|
|
string error = String.Format("Line: {0} - Position: {1} - {2}", XmlTextReader.LineNumber, XmlTextReader.LinePosition,
|
|
args.Message);
|
|
|
|
if (LastXmlErrors == String.Empty)
|
|
LastXmlErrors = error;
|
|
else
|
|
LastXmlErrors += Helpers.NewLine + error;
|
|
}
|
|
}
|
|
}
|