c# – 从Saxon 9.4he中的嵌入资源加载xml和xslt

2023-01-02 07:30:17

我使用Saxon 9.4家庭版(Saxon-HE 9.4 .NET)来获得对XSLT 2.0和XPath 2.0以及.NET中的XQuery 1.0的支持.当我加载没有URI的文件时,我的代码崩溃了.

>是否可以在没有与加载的文档相关的URI的情况下加载xml / xsl文档？
>如果没有,有没有办法为嵌入在dll文件中的元素定义URI？

任何其他解决方案也将受到赞赏,我唯一的术语是必须从dll文件中加载文件.

只要我从文件加载xml / xsl,我的代码就可以正常工作：

const string sourcePath = @"C:\test\TestInvoiceWithError.xml";
const string xsltpath = @"C:\test\UBL-T10-BiiRules.xsl";

当我尝试从嵌入式资源加载时,代码抛出一个异常,指出“没有提供基本URI”：

Stream sourceStream = GetEmbeddedResource("TestProject1.testfiles.TestInvoice.xml");
Stream xsltStream = GetEmbeddedResource("TestProject1.testfiles.UBL-T10-BiiRules.xsl");

我还为具有相对路径的资源创建了Uri,这会引发异常“相对URI不支持此操作.”：

Uri sourceUri = new Uri("/TestProject1;component/testfiles/TestInvoice.xml",     UriKind.Relative);
Uri xsltUri = new Uri("/TestProject1;component/testfiles/UBL-T10-BiiRules.xsl.xml", UriKind.Relative);

这是我的代码：

using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Text;
using System.Xml;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Saxon.Api;


namespace TestProject1
{
    [TestClass]
    public class XsltTest
    {
        [TestMethod]
        public void SaxonTest()
        {
            Stream sourceStream = GetEmbeddedResource("TestProject1.testfiles.TestInvoice.xml");
            Stream xsltStream = GetEmbeddedResource("TestProject1.testfiles.UBL-T10-BiiRules.xsl");

            Uri sourceUri = new Uri("/TestProject1;component/testfiles/TestInvoice.xml", UriKind.Relative);
            Uri xsltUri = new Uri("/TestProject1;component/testfiles/UBL-T10-BiiRules.xsl.xml", UriKind.Relative);

            const string sourcePath = @"C:\test\TestInvoiceWithError.xml";
            const string xsltpath = @"C:\test\UBL-T10-BiiRules.xsl";

            Processor processor = new Processor();
            XdmNode input = processor.NewDocumentBuilder().Build(new Uri(sourcePath));

            XsltTransformer transformer = processor.NewXsltCompiler().Compile(new Uri(xsltpath)).Load();

            transformer.InitialContextNode = input;

            Serializer serializer = new Serializer();
            StringBuilder sb = new StringBuilder();
            TextWriter writer = new StringWriter(sb);
            serializer.SetOutputWriter(writer);

            transformer.Run(serializer);

            XmlDocument xmlDocOut = new XmlDocument();
            xmlDocOut.LoadXml(sb.ToString());
            XmlNodeList failedAsserts = xmlDocOut.SelectNodes("/svrl:schematron-output/svrl:failed-assert",XmlInvoiceNamespaceManager());

            if (failedAsserts == null)
                return;

            foreach (XmlNode failedAssert in failedAsserts)
            {
                if (failedAssert.Attributes == null)
                    continue;

                XmlAttribute typeOfError = failedAssert.Attributes["flag"];

                if (typeOfError.Value.Equals("warning"))
                {/*Log something*/}
                else if (typeOfError.Value.Equals("fatal"))
                {/*Log something*/}
            }
        }

        private XmlNamespaceManager XmlInvoiceNamespaceManager()
        {
            IDictionary<string, string> list = new Dictionary<string, string>
                                                   {
                                                       {"xml", "http://www.w3.org/XML/1998/namespace"},
                                                       {"xsi", "http://www.w3.org/2001/XMLSchema-instance"},
                                                       {"xsd", "http://www.w3.org/2001/XMLSchema"},
                                                       {"udt","urn:un:unece:uncefact:data:specification:UnqualifiedDataTypesSchemaModule:2"},
                                                       {"qdt","urn:oasis:names:specification:ubl:schema:xsd:QualifiedDatatypes-2"},
                                                       {"ext","urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2"},
                                                       {"ccts", "urn:un:unece:uncefact:documentation:2"},
                                                       {"cbc","urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2"},
                                                       {"cac","urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"},
                                                       {"inv", "urn:oasis:names:specification:ubl:schema:xsd:Invoice-2"},
                                                       {"svrl", "http://purl.oclc.org/dsdl/svrl"}
                                                   };

            XmlNameTable xmlNameTable = new NameTable();

            XmlNamespaceManager xmlInvoiceNamespaceManager = new XmlNamespaceManager(xmlNameTable);

            foreach (KeyValuePair<string, string> ns in list)
            {
                xmlInvoiceNamespaceManager.AddNamespace(ns.Key, ns.Value);
            }
            return xmlInvoiceNamespaceManager;
        }

        protected static Stream GetEmbeddedResource(string path)
        {
            Assembly asm = Assembly.GetExecutingAssembly();
            Stream stream = asm.GetManifestResourceStream(path);
            return stream;
        }
    }
}

解决方法:

我认为您可以使用Saxon从流加载,但您需要首先设置一个基本URI,以允许加载任何引用资源(如XML文档中的DTD或类似包含或导入的样式表模块).如果您确定没有,那么只需尝试例如

DocumentBuilder db = processor.NewDocumentBuilder();
db.BaseUri = new Uri("file:///C:/");

XdmNode input = db.Build(xsltStream);

显然,如果您需要在XSLT中解析也要作为嵌入式资源加载的相对URI,则需要更多工作：您需要将XmlResolver设置为支持从嵌入式资源加载资源的类,以及XSLT中的URI,用于向解析程序指示您需要从资源加载.我不认为.NET框架提供了这种类型的XmlResolver,并且Uri类也不支持自定义模式.

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