OpenRasta无法在PUT上正确反序列化实体

时间:2011-07-15 13:31:29

标签: http deserialization put openrasta

在OpenRasta处理程序中处理HTTP PUT时,我遇到了一些非常奇怪的行为。处理程序方法签名如下所示:

public CustomerResource Put(CustomerForm customerForm)

以下是相关的ResourceSpace配置:

ResourceSpace.Has.ResourcesOfType<CustomerListResource>()
    .AtUri("/customers")
    .HandledBy<CustomerHandler>()
    .RenderedByAspx("~/Views/Customer/CustomerListView.aspx")
    .And.AsJsonDataContract().ForMediaType("application/json;q=0.3")
    .And.AsXmlSerializer().ForMediaType("application/xml;q=0.2");

ResourceSpace.Has.ResourcesOfType<CustomerResource>()
    .AtUri("/customers/{id}")
    .HandledBy<CustomerHandler>()
    .RenderedByAspx("~/Views/Customer/CustomerEditView.aspx")
    .And.AsJsonDataContract().ForMediaType("application/json;q=0.3")
    .And.AsXmlSerializer().ForMediaType("application/xml;q=0.2");

// To support POST and PUT to /customers
ResourceSpace.Has.ResourcesOfType<CustomerForm>()
    .WithoutUri
    .RenderedByAspx("~/Views/Customer/CustomerEditView.aspx")
    .And.AsJsonDataContract().ForMediaType("application/json;q=0.3")
    .And.AsXmlSerializer().ForMediaType("application/xml;q=0.2");

CustomerForm看起来像这样:

[XmlRoot("customer", Namespace = ClientSettings.Namespace)]
public class CustomerForm : FormBase, ICustomer
{
    [XmlElement("contact-info")]
    public ContactInfo ContactInfo { get; set; }

    [XmlAttribute("id")]
    public int Id { get; set; }
}

ContactInfo看起来像这样:

[XmlRoot("contact-info", Namespace = ClientSettings.Namespace)]
public class ContactInfo
{
    [XmlElement("email")]
    public string Email{ get; set; }

    [XmlElement("first-name")]
    public string FirstName{ get; set; }

    [XmlElement("last-name")]
    public string LastName{ get; set; }

    [XmlElement("mobile-phone-number")]
    public string MobilePhoneNumber { get; set; }
}

我的问题是当CustomerForm PUT到服务器时,OpenRasta无法正确反序列化它。它的作用是将ContactInfo设置为null进行反序列化,尽管它是从客户端成功发送的。我甚至已经深入到IRequest.Entity.Stream以确保我需要的XML确实存在,并且它是:

<?xml version="1.0" encoding="utf-8"?>
<customer id="1" xmlns="urn:namespace">
    <contact-info>
        <email>5867ca8a5a5548428c4bc90c1f7e41d6@example.com</email>
        <first-name>0440a6d5f071478d8571bac1301552bc</first-name>
        <last-name>49069fb41eb141c79326dc64fa034573</last-name>
        <mobile-phone-number>59980075</mobile-phone-number>
    </contact-info>
</customer>

如果IRequest.Entity.Stream方法中收到的反序列化CustomerForm对象没有,Put(CustomerForm)如何包含必要的数据?我有测试确保序列化和反序列化完美地工作,我甚至在完全相同的处理程序中也有Post(CustomerForm)。只有当HTTP方法为PUT时CustomerFormContactInfo设置为null

我已经彻底阅读了OpenRasta的调试输出,所有内容都是:

    27-[2011-07-15 11:09:15Z] Information(0) Operation CustomerHandler::Put(CustomerForm customerForm) was selected with a codec score of 0
    27-[2011-07-15 11:09:15Z] Information(0) Loaded codec OpenRasta.Codecs.XmlSerializerCodec
    27-[2011-07-15 11:09:15Z] Verbose(0) Switching to full object media type reading.
27-[2011-07-15 11:09:15Z] Stop(1) Exiting PipelineRunner
27-[2011-07-15 11:09:15Z] Start(1) Entering PipelineRunner: Executing contributor OperationInterceptorContributor.WrapOperations
27-[2011-07-15 11:09:16Z] Stop(1) Exiting PipelineRunner
27-[2011-07-15 11:09:16Z] Start(1) Entering PipelineRunner: Executing contributor OperationInvokerContributor.ExecuteOperations
    27-[2011-07-15 11:09:16Z] Verbose(0) Ignoring constructor, following dependencies didn't have a registration:OpenRasta.OperationModel.Interceptors.IOperationInterceptor[]

我发现的唯一奇怪的是,MissingMethodException在此步骤之后被抛出为FirstChanceException(但从未冒泡),但它的堆栈痕迹太短了我不知道可能是什么问题:

2011-07-15T13:09:16.036 AppDomain.FirstChanceException
System.MissingMethodException: Member not found.
   at System.DefaultBinder.BindToMethod(BindingFlags bindingAttr, MethodBase[] match, Object[]& args, ParameterModifier[] modifiers, CultureInfo cultureInfo, String[] names, Object& state)

我不知道为什么会抛出MissingMethodException以及为什么在我不订阅AppDomain.FirstChanceException事件时它不会冒泡,但这可能与我{{1}的原因有关没有正确反序列化。但是,由于它在HTTP POST上正确反序列化,我有疑虑。

想法?

2 个答案:

答案 0 :(得分:1)

听起来很古怪,但您是否尝试将ID移至CustomerForm对象的顶部?

[XmlRoot("customer", Namespace = ClientSettings.Namespace)]
public class CustomerForm : FormBase, ICustomer
{
    [XmlAttribute("id")]
    public int Id { get; set; }

    [XmlElement("contact-info")]
    public ContactInfo ContactInfo { get; set; }
}

Openrasta使用(可怕的).net数据契约xml序列化程序,它对元素位置很敏感。我们实际上编写了我们自己的序列化器,它只是恢复到传统的'dot net'xml序列化器。

答案 1 :(得分:1)

问题似乎在于如何解释URL并将其映射到处理程序,因为如果我添加一个也需要int id的处理程序方法,如下所示:

CustomerResource Put(int id, CustomerForm customerForm)

有效。这可能是由于以下资源注册:

ResourceSpace.Has.ResourcesOfType<CustomerResource>()
    .AtUri("/customers/{id}")

虽然我有这个:

ResourceSpace.Has.ResourcesOfType<CustomerForm>()
    .WithoutUri

我尝试修改CustomerForm的注册以包含ID:

ResourceSpace.Has.ResourcesOfType<CustomerForm>()
    .AtUri("/customers/{id}")

并且还要在CustomerResourceCustomerForm注册中选择ID:

ResourceSpace.Has.ResourcesOfType<CustomerResource>()
    .AtUri("/customers/{*id}")

ResourceSpace.Has.ResourcesOfType<CustomerForm>()
    .AtUri("/customers/{*id}")

这没有任何帮助,但将int id参数添加到处理程序方法中,所以我很高兴因为这使OpenRasta成功反序列化我的实体。