使用spring.net注入后让parse有使用xsd文件验证XML格式

╰半橙微兮° 2022-07-14 00:23 161阅读 0赞

临时接到这个任务，按我的习惯查到不少这种实现，感谢网上的大牛，每次都能够给我灵感

http://blog.csdn.net/gdjlc/article/details/11374787

由于我这边没有 scchema uri所以用了他这里一段精简版

/// <summary>  
           /// 通过xsd验证xml格式是否正确，正确返回空字符串，错误返回提示  
           /// </summary>  
           /// <param name="xmlText">xml文本内容</param>  
           /// <param name="schemaFile">xsd文件</param>  
           /// <returns></returns>  
           public static string XmlValidateByXsd(string xmlText, string schemaFile)  
           {  
               StringBuilder sb = new StringBuilder();  
               XmlReaderSettings settings = new XmlReaderSettings();  
               settings.ValidationType = ValidationType.Schema;  
               settings.Schemas.Add(null, schemaFile);  
               settings.ValidationEventHandler += (x, y) =>  
               {  
                   sb.AppendFormat("{0}\n", y.Message);  
               };  
               using (XmlReader reader = XmlReader.Create(new StringReader(xmlText), settings))  
               {  
                   try  
                   {  
                       while (reader.Read()) ;  
                   }  
                   catch (XmlException ex)  
                   {  
                       sb.AppendFormat("{0}\n", ex.Message);  
                   }  
               }  
               return sb.ToString();  
           }

同时为了实现动态植入，当然需要做接口代理类，但是我们的parse抽象类有两个文件的解析，dataquery和quickquery，那我照葫芦画瓢也需要对不同的泛型占位符有不同的约束 ，首先上接口和抽象类，我把具体的实现已经实现在抽象类里了。

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Security.Cryptography.X509Certificates;
    using System.Text;
    using System.Threading.Tasks;
    using Com.Centaline.Framework.QuickQuery.Config.Entity;
    using System.IO;
    using System.Xml;
    
    namespace Com.Centaline.Framework.QuickQuery.Config.Interface
    {
        public interface ISchemaValidator<TResult,TResource> 
        {
            string XmlValidateByXsd(Stream xmlStream, XmlReader xmlReader);
    
    
    
            string XmlValidateByXsd(ref TResource resource);
        }
    }

抽象类去实现这个接口：

using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Reflection;
    using System.Text;
    using System.Threading.Tasks;
    using System.Xml;
    using Com.Centaline.Framework.Kernel.ObjectExtensions;
    using Com.Centaline.Framework.QuickQuery.Config.Entity;
    using Com.Centaline.Framework.QuickQuery.Config.Interface;
    
    namespace Com.Centaline.Framework.QuickQuery.Config
    {
        public abstract class SchemaValidator<TResult,TResource> : ISchemaValidator<TResult, TResource> 
            where TResource:Resource<TResult>
            where TResult : class, new()
        {
            public virtual string XmlValidateByXsd(Stream xmlStream, XmlReader xmlReader)
            {
                StringBuilder sb = new StringBuilder();
                XmlReaderSettings settings = new XmlReaderSettings();
                settings.ValidationType = ValidationType.Schema;
                settings.Schemas.Add(null, xmlReader);
                settings.ValidationEventHandler += (x, y) =>
                {
                    sb.AppendFormat("{0}\n", y.Message);
                };
                using (XmlReader reader = XmlReader.Create(xmlStream, settings))
                {
                    try
                    {
                        while (reader.Read());
                    }
                    catch (XmlException ex)
                    {
                        sb.AppendFormat("{0}\n", ex.Message);
                    }
                }
                return sb.ToString();
            }
    
            public virtual string XmlValidateByXsd(ref TResource resource)
            {
                throw new NotImplementedException();
    
                //return XmlValidateByXsd(resource.Stream, "d:\\Users\\wanglin36\\centaline-infrastructure\\Com.Centaline.Framework.QuickQuery\\Config\\Schema\\DataQuery.xsd");
            }
        }
    }

这里的神奇之处我方法都用了virtual，而且对一些外部的调用类并没有实现，而且将操作的入参和出参都做了约束，这个约束要在后来具体继承给定。然后两个实现类：

using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.IO;
    using System.Linq;
    using System.Reflection;
    using System.Text;
    using System.Threading.Tasks;
    using System.Xml;
    using Com.Centaline.Framework.QuickQuery.Config;
    using Com.Centaline.Framework.QuickQuery.Config.Interface;
    using Com.Centaline.Framework.QuickQuery.Config.Entity;
    
    namespace Com.Centaline.Framework.QuickQuery.Config
    {
        public class QuickQuerySchemaValidator:SchemaValidator<Entity.QuickQuery, QuickQueryResource>
        {
            public override string XmlValidateByXsd(Stream xmlStream, XmlReader xmlReader)
            {
               return base.XmlValidateByXsd(xmlStream, xmlReader);
    
            }
    
            public override string XmlValidateByXsd(ref QuickQueryResource resource)
            {
                using (var sm = Assembly.GetExecutingAssembly().GetManifestResourceStream("Com.Centaline.Framework.QuickQuery.Config.Schema.QuickQuery.xsd"))
                {
                    //byte[] bs = new byte[sm.Length];
                    //sm.Read(bs, 0, (int)sm.Length);
    
                    
                   return XmlValidateByXsd(resource.Stream,  XmlReader.Create(sm));
                }
                //return XmlValidateByXsd(resource.Stream, "d:\\Users\\wanglin36\\centaline-infrastructure\\Com.Centaline.Framework.QuickQuery\\Config\\Schema\\QuickQuery.xsd");
            }
    
        }
    }

这里最有意思的是我知道xsd架构文件是嵌入在dll的中间插件里，然后用GetExecutingAssembly来读到assemble的stream用xmlreader 来创建，这都归功于网络上的高手：

http://blog.csdn.net/u011190993/article/details/39960865

看了上面的博客，我在结合msdn发觉XmlSchemaSet.add有Xmlreader作为schema文件的输入：

https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=ZH-CN&k=k(System.Xml.Schema.XmlSchemaSet.Add);k(SolutionItemsProject);k(TargetFrameworkMoniker-.NETFramework,Version%3Dv4.5);k(DevLang-csharp)&rd=true

最后用spring.net的属性植入来植入这两个实现类，根据接口，竟然都能够找到对应的实现，真是发觉java spring的强大

红色就是属性注入的地方，最后只要Parse抽象类中做定义就可以了，通过接口隐藏具体的实现实在太强大了

下面这段就是quickquery实现中加入了验证：

protected virtual TResult ParseDirect(ref TResource resource)
            {
                Monitor.Watch(string.Format("read and parse file {0} .", resource.Path));
                TResult result = null;
                resource = ConfigReader.Read(ref resource);
                resource.PreLastWriteTime = resource.LastWriteTime;
               string ValidateResult = SchemaValidator.XmlValidateByXsd(ref resource); resource.Stream.Close(); resource.Stream.Dispose(); resource.Stream = null; if (!ValidateResult.IsNullOrEmpty()) { string errorMessage = string.Format("file : {0} does not Conform to the schema file!", resource.Path); Monitor.Watch(errorMessage); throw new Exception.QuickQueryException(errorMessage); }
                resource = ConfigReader.Read(ref resource);
                resource.PreLastWriteTime = resource.LastWriteTime;
                result = resource.Entity = ConfigParser.Parse(ref resource);
                return result;
            }

下面就是DataQuery实现中加入的验证：

public virtual TResult ParseSchema(ref TResource resource)
            {
                lock (_LockObject)
                {
                    TResult result = new TResult();
                    switch (resource.ParseLevel)
                    {
                        case ParseLevel.NULL:
                            resource = ConfigResourceReader.Read(ref resource);
                        
                            resource = ConfigReader.Read(ref resource);
                          string ValidateResult = SchemaValidator.XmlValidateByXsd(ref resource); resource.Stream.Close(); resource.Stream.Dispose(); resource.Stream = null; if (!ValidateResult.IsNullOrEmpty()) { string errorMessage = string.Format("file : {0} does not Conform to the schema file!", resource.Path); Monitor.Watch(errorMessage); throw new Exception.QuickQueryException(errorMessage); }
                            resource = ConfigResourceReader.Read(ref resource);
                            resource = ConfigReader.Read(ref resource);
                            result = ConfigParser.ParseSchema(ref resource);
                            break;
                        case ParseLevel.Detail:
                            result = resource.Entity;
                            break;
                        default:
                            break;
                    }
                    return result;
                }
            }