RESTSharp有反序列化XML包括字节顺序标记的问题？ [英] RESTSharp has problems deserializing XML including Byte Order Mark?

问题描述

有一个公共Web服务，我想在很短的C＃应用​​程序的使用方法：
http://ws.parlament.ch/

There is a public webservice which I want to use in a short C# Application: http://ws.parlament.ch/

这是此WebService的返回的XML有一个物料清单开头，这将导致RESTSharp失败，并出现以下错误信息的XML的反序列化：

The returned XML from this webservice has a "BOM" at the beginning, which causes RESTSharp to fail the deserializing of the XML with the following error message:

错误检索响应。检查内部细节的更多信息。 --->
System.Xml.XmlException：是在根级别的数据无效。在System.Xml.XmlTextReaderImpl.Throw（例外五）在System.Xml.XmlTextReaderImpl.Throw结果
（字符串资源，字符串ARG）在$ 1号线，
位置1。 b $ b System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace（）留在
System.Xml.Linq的在
System.Xml.XmlTextReaderImpl.Read
System.Xml.XmlTextReaderImpl.ParseDocumentContent（）（） .XDocument.Load（XmlReader中的读者，LoadOptions期权）在System.Xml.Linq.XDocument.Parse
（字符串文本，LoadOptions选项），结果
在System.Xml.Linq.XDocument.Parse（在
RestSharp.Deserializers.XmlDeserializer.Deserialize [T]字符串文本）（IRestResponse $在RestSharp.RestClient.Deserialize [T] b $ b响应）（IRestRequest
要求，IRestResponse生）结果
---电内部异常堆栈跟踪---

Error retrieving response. Check inner details for more info. ---> System.Xml.XmlException: Data at the root level is invalid. Line 1, position 1. at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.Throw(String res, String arg) at System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace() at System.Xml.XmlTextReaderImpl.ParseDocumentContent() at System.Xml.XmlTextReaderImpl.Read() at System.Xml.Linq.XDocument.Load(XmlReader reader, LoadOptions options) at System.Xml.Linq.XDocument.Parse(String text, LoadOptions options)
at System.Xml.Linq.XDocument.Parse(String text) at RestSharp.Deserializers.XmlDeserializer.Deserialize[T](IRestResponse response) at RestSharp.RestClient.Deserialize[T](IRestRequest request, IRestResponse raw)
--- End of inner exception stack trace ---

下面是使用的http://ws.parlament.ch/sessions?format=xml 得到的一个List 会话的

Here is an easy sample by using http://ws.parlament.ch/sessions?format=xml to get a List of 'Sessions':

public class Session
{
    public int Id { get; set; }
    public DateTime? Updated { get; set; }
    public int? Code { get; set; }
    public DateTime? From { get; set; }
    public string Name { get; set; }
    public DateTime? To { get; set; }
}


static void Main(string[] args)
    {
        var request = new RestRequest();
        request.RequestFormat = DataFormat.Xml;
        request.Resource = "sessions";
        request.AddParameter("format", "xml");

        var client = new RestClient("http://ws.parlament.ch/");
        var response = client.Execute<List<Session>>(request);

        if (response.ErrorException != null)
        {
            const string message = "Error retrieving response.  Check inner details for more info.";
            var ex = new ApplicationException(message, response.ErrorException);
            Console.WriteLine(ex);
        }

        List<Session> test = response.Data;

        Console.Read();
    }

当我第一次操作使用Fiddler返回的XML除去前3位（在物料清单），上面的代码工作！可能有人请帮我直接在RESTSharp处理呢？我究竟做错了什么？ ！谢谢你在前进

When I first manipulate the returned xml with Fiddler to remove the first 3 bits (the "BOM"), the above code works! May someone please help me to handle this directly in RESTSharp? What am I doing wrong? THANK YOU in advance!

推荐答案

我找到了解决方案 - ！谢谢@arootbeer的提示

I found the Solution - Thank you @arootbeer for the hints!

相反包裹XMLDeserializer，你还可以使用#RESTSharp了RestRequest.OnBeforeDeserialization事件。所以，你只需要在新RestRequest后插入这样的事情（）（请参阅我最初的代码示例），然后它的作品完美！

Instead of wrapping the XMLDeserializer, you can also use the 'RestRequest.OnBeforeDeserialization' event from #RESTSharp. So you just need to insert something like this after the new RestRequest() (see my initial code example) and then it works perfect!

request.OnBeforeDeserialization = resp =>
            {
                //remove the first ByteOrderMark
                //see: http://stackoverflow.com/questions/19663100/restsharp-has-problems-deserializing-xml-including-byte-order-mark
                string byteOrderMarkUtf8 = Encoding.UTF8.GetString(Encoding.UTF8.GetPreamble());
                if (resp.Content.StartsWith(byteOrderMarkUtf8))
                    resp.Content = resp.Content.Remove(0, byteOrderMarkUtf8.Length);
            };

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