帮助!我有一个 C# 应用程序正在使用的 Axis Web 服务。一切都很好,除了长值数组总是出现 [0,0,0,0] - 正确的长度,但值没有反序列化。我尝试过使用其他原语(整数、双精度数)并且发生了同样的事情。我该怎么办?我不想改变我的服务的语义。
3 回答
这就是我最终的结果。我从来没有为此找到另一个解决方案,所以如果你有更好的东西,一定要贡献。
首先,wsdl:types 区域中的长数组定义:
<xsd:complexType name="ArrayOf_xsd_long">
<xsd:complexContent mixed="false">
<xsd:restriction base="soapenc:Array">
<xsd:attribute wsdl:arrayType="soapenc:long[]" ref="soapenc:arrayType" />
</xsd:restriction>
</xsd:complexContent>
</xsd:complexType>
接下来,我们创建一个将执行修复的 SoapExtensionAttribute。似乎问题在于 .NET 没有将 multiref id 跟踪到包含 double 值的元素。因此,我们处理数组项,查找值,然后将值插入到元素中:
[AttributeUsage(AttributeTargets.Method)]
public class LongArrayHelperAttribute : SoapExtensionAttribute
{
private int priority = 0;
public override Type ExtensionType
{
get { return typeof (LongArrayHelper); }
}
public override int Priority
{
get { return priority; }
set { priority = value; }
}
}
public class LongArrayHelper : SoapExtension
{
private static ILog log = LogManager.GetLogger(typeof (LongArrayHelper));
public override object GetInitializer(LogicalMethodInfo methodInfo, SoapExtensionAttribute attribute)
{
return null;
}
public override object GetInitializer(Type serviceType)
{
return null;
}
public override void Initialize(object initializer)
{
}
private Stream originalStream;
private Stream newStream;
public override void ProcessMessage(SoapMessage m)
{
switch (m.Stage)
{
case SoapMessageStage.AfterSerialize:
newStream.Position = 0; //need to reset stream
CopyStream(newStream, originalStream);
break;
case SoapMessageStage.BeforeDeserialize:
XmlWriterSettings settings = new XmlWriterSettings();
settings.Indent = false;
settings.NewLineOnAttributes = false;
settings.NewLineHandling = NewLineHandling.None;
settings.NewLineChars = "";
XmlWriter writer = XmlWriter.Create(newStream, settings);
XmlDocument xmlDocument = new XmlDocument();
xmlDocument.Load(originalStream);
List<XmlElement> longArrayItems = new List<XmlElement>();
Dictionary<string, XmlElement> multiRefs = new Dictionary<string, XmlElement>();
FindImportantNodes(xmlDocument.DocumentElement, longArrayItems, multiRefs);
FixLongArrays(longArrayItems, multiRefs);
xmlDocument.Save(writer);
newStream.Position = 0;
break;
}
}
private static void FindImportantNodes(XmlElement element, List<XmlElement> longArrayItems,
Dictionary<string, XmlElement> multiRefs)
{
string val = element.GetAttribute("soapenc:arrayType");
if (val != null && val.Contains(":long["))
{
longArrayItems.Add(element);
}
if (element.Name == "multiRef")
{
multiRefs[element.GetAttribute("id")] = element;
}
foreach (XmlNode node in element.ChildNodes)
{
XmlElement child = node as XmlElement;
if (child != null)
{
FindImportantNodes(child, longArrayItems, multiRefs);
}
}
}
private static void FixLongArrays(List<XmlElement> longArrayItems, Dictionary<string, XmlElement> multiRefs)
{
foreach (XmlElement element in longArrayItems)
{
foreach (XmlNode node in element.ChildNodes)
{
XmlElement child = node as XmlElement;
if (child != null)
{
string href = child.GetAttribute("href");
if (href == null || href.Length == 0)
{
continue;
}
if (href.StartsWith("#"))
{
href = href.Remove(0, 1);
}
XmlElement multiRef = multiRefs[href];
if (multiRef == null)
{
continue;
}
child.RemoveAttribute("href");
child.InnerXml = multiRef.InnerXml;
if (log.IsDebugEnabled)
{
log.Debug("Replaced multiRef id '" + href + "' with value: " + multiRef.InnerXml);
}
}
}
}
}
public override Stream ChainStream(Stream s)
{
originalStream = s;
newStream = new MemoryStream();
return newStream;
}
private static void CopyStream(Stream from, Stream to)
{
TextReader reader = new StreamReader(from);
TextWriter writer = new StreamWriter(to);
writer.WriteLine(reader.ReadToEnd());
writer.Flush();
}
}
最后,我们标记 Reference.cs 文件中的所有方法,这些方法将使用我们的属性反序列化一个长数组:
[SoapRpcMethod("", RequestNamespace="http://some.service.provider",
ResponseNamespace="http://some.service.provider")]
[return : SoapElement("getFooReturn")]
[LongArrayHelper]
public Foo getFoo()
{
object[] results = Invoke("getFoo", new object[0]);
return ((Foo) (results[0]));
}
这个修复是长期特定的,但它可能被推广到处理任何有这个问题的原始类型。
这是我写的关于该主题的博客文章的或多或少的复制粘贴版本。
执行摘要:您可以更改 .NET 反序列化结果集的方式(请参阅上面 Chris 的解决方案),或者您可以重新配置 Axis 以以与 .NET SOAP 实现兼容的方式序列化其结果。
如果你走后一条路线,方法如下:
...生成的类看起来运行正常,但是如果您查看客户端(.NET/WCF)端的反序列化数组,您会发现该数组已被错误地反序列化,并且所有值都在数组为 0。您必须手动查看 Axis 返回的 SOAP 响应以找出问题所在;这是一个示例响应(再次为清楚起见进行了编辑):
<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv=http://schemas.xmlsoap.org/soap/envelope/>
<soapenv:Body>
<doSomethingResponse>
<doSomethingReturn>
<doSomethingReturn href="#id0"/>
<doSomethingReturn href="#id1"/>
<doSomethingReturn href="#id2"/>
<doSomethingReturn href="#id3"/>
<doSomethingReturn href="#id4"/>
</doSomethingReturn>
</doSomethingResponse>
<multiRef id="id4">5</multiRef>
<multiRef id="id3">4</multiRef>
<multiRef id="id2">3</multiRef>
<multiRef id="id1">2</multiRef>
<multiRef id="id0">1</multiRef>
</soapenv:Body>
</soapenv:Envelope>
您会注意到 Axis 不会直接在返回的元素中生成值,而是引用外部元素获取值。当有很多引用相对较少的离散值时,这可能是有道理的,但无论如何,WCF basicHttpBinding 提供程序都没有正确处理这件事(据报道,gSOAP 和经典的 .NET Web 引用也是如此)。
我花了一段时间才找到解决方案:编辑 Axis 部署的 server-config.wsdd 文件并找到以下参数:
<parameter name="sendMultiRefs" value="true"/>
将其更改为 false,然后通过命令行重新部署,它(在 Windows 下)看起来像这样:
java -cp %AXISCLASSPATH% org.apache.axis.client.AdminClient server-config.wsdl
Web 服务的响应现在应该可以由您的 .NET 客户端反序列化。