使用返回 XML 的 Recurly Rest API 时出现 WebAPI 序列化问题 [英] WebAPI Serialization problems when consuming Recurly Rest API which returns XML
问题描述
我是 ASP.Net Web API 的新手.我正在尝试与基于 Recurly REST 的 API 进行交互,但在 ReadAsAsync 调用期间出现如下错误,我认为这是我认为它尝试序列化响应的关键.
I'm new to the ASP.Net Web API. I'm trying to interact with the Recurly REST based API and I am getting errors like below during my ReadAsAsync call which is the point I believe it attempts to serialize the response.
{"Error in line 1 position 73. Expecting element 'account' from namespace 'http://schemas.datacontract.org/2004/07/RecurlyWebApi.Recurly'.. Encountered 'Element' with name 'account', namespace ''. "}
这是我的 HttpClient 实现,为简洁起见进行了简化:
Here is my HttpClient implementation, simplified for brevity:
public class RecurlyClient
{
readonly HttpClient client = new HttpClient();
public RecurlyClient()
{
var config = (RecurlySection)ConfigurationManager.GetSection("recurly");
client.BaseAddress = new Uri(string.Format("https://{0}.recurly.com/v2/", config.Subdomain));
// Add the authentication header
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(Encoding.ASCII.GetBytes(config.ApiKey)));
// Add an Accept header for XML format.
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/xml"));
}
public T Get<T>(string id)
{
var accounts = default(T);
// Make the request and get the response from the service
HttpResponseMessage response = client.GetAsync(string.Concat("accounts/", id)).Result; // Blocking call!
if (response.IsSuccessStatusCode)
{
// Parse the response body. Blocking!
accounts = response.Content.ReadAsAsync<T>().Result;
}
return accounts;
}
}
这是我的模型:
[XmlRoot("account")]
public class Account
{
[XmlAttribute("href")]
public string Href { get; set; }
[XmlElement("account_code")]
public string AccountCode { get; set; }
[XmlElement("state")]
public AccountState State { get; set; }
[XmlElement("username")]
public string Username { get; set; }
[XmlElement("email")]
public string Email { get; set; }
[XmlElement("first_name")]
public string FirstName { get; set; }
[XmlElement("last_name")]
public string LastName { get; set; }
[XmlElement("company_name")]
public string Company { get; set; }
[XmlElement("accept_language")]
public string LanguageCode { get; set; }
[XmlElement("hosted_login_token")]
public string HostedLoginToken { get; set; }
[XmlElement("created_at")]
public DateTime CreatedDate { get; set; }
[XmlElement("address")]
public Address Address { get; set; }
}
以及来自服务的 XML 响应示例:
And an example of the XML response from the service:
<account href="https://mysubdomain.recurly.com/v2/accounts/SDTEST01">
<adjustments href="https://mysubdomain.recurly.com/v2/accounts/SDTEST01/adjustments"/>
<invoices href="https://mysubdomain.recurly.com/v2/accounts/SDTEST01/invoices"/>
<subscriptions href="https://mysubdomain.recurly.com/v2/accounts/SDTEST01/subscriptions"/>
<transactions href="https://mysubdomain.recurly.com/v2/accounts/SDTEST01/transactions"/>
<account_code>SDTEST01</account_code>
<state>active</state>
<username>myusername</username>
<email>simon@example.co.uk</email>
<first_name>First name</first_name>
<last_name>Last name</last_name>
<company_name>My Company Name</company_name>
<vat_number nil="nil"></vat_number>
<address>
<address1>My Address Line 1/address1>
<address2>My Address Line 2</address2>
<city>My City</city>
<state>My State</state>
<zip>PL7 1AB</zip>
<country>GB</country>
<phone>0123456789</phone>
</address>
<accept_language nil="nil"></accept_language>
<hosted_login_token>***</hosted_login_token>
<created_at type="datetime">2013-08-22T15:58:17Z</created_at>
</account>
推荐答案
我认为问题是因为默认情况下 DataContractSerializer 用于反序列化 XML,并且默认情况下 DataContractSerializer 使用命名空间 http://schemas.datacontract.org/2004/07/Clr.Namespace.(在这种情况下,Clr.Namepace 是 RecurlyWebApi.Recurly.)
I think the problem is because by default the DataContractSerializer is being used to deserialize the XML, and by default the DataContractSerializer uses a namespace of namespace http://schemas.datacontract.org/2004/07/Clr.Namespace. (In this case Clr.Namepace is RecurlyWebApi.Recurly.)
因为您的 XML 具有属性,所以您需要使用 XmlSerializer 而不是 DataContractSerializer,并且您准备这样做是因为您的帐户类是用 Xml* 属性修饰的.但是,您必须使用使用 XmlSerializer 的 XmlMediaTypeFormatter.您可以按照 此页面:
Because your XML has attributes, you need to use the XmlSerializer instead of the DataContractSerializer, and you're set up to do this because your account class is decorated with Xml* attributes. However, you have to use an XmlMediaTypeFormatter which is using the XmlSerializer. You can do this by setting a flag on the global XMLFormatter as described on this page:
var xml = GlobalConfiguration.Configuration.Formatters.XmlFormatter;
xml.UseXmlSerializer = true;
或者通过将 MediaTypeFormatter 作为参数提供给 ReadAsAsync 调用:
or by supplying a MediaTypeFormatter as a parameter to your ReadAsAsync call:
var xmlFormatter = GlobalConfiguration.Configuration.Formatters.XmlFormatter;
xmlFormatter.UseXmlSerializer = true;
accounts = response.ReadAsAsync<T>(xmlFormatter).Result
不是 100% 确定这一点,因为这并不能解释为什么错误消息中的第一个帐户"是小写的 - DataContractSerializer 应该忽略 XmlRoot 属性.
Not 100% sure of this because this doesn't explain why the first 'account' in your error message is lower case - the DataContractSerializer should ignore the XmlRoot attribute.
这篇关于使用返回 XML 的 Recurly Rest API 时出现 WebAPI 序列化问题的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!