我写了一个WCF Rest Service,其中在POST方法中Json Object作为StudentDetails接收。现在,我要验证其结构,使其不应该包含比指定字段更多的字段/信息。
以下是我的服务(ServiceContract)
namespace RestService
{
[ServiceContract]
public interface IRestService
{
[OperationContract]
[WebInvoke(Method = "POST", UriTemplate = "/SaveStudent", RequestFormat =WebMessageFormat.Json,
ResponseFormat = WebMessageFormat.Json)]
string SaveStudent(StudentDetails studentDetails);
}
[Serializable]
public class WebServiceDictionary : ISerializable
{
public Dictionary<string, string> Entries { get; }
public WebServiceDictionary()
{
Entries = new Dictionary<string, string>();
}
public WebServiceDictionary(SerializationInfo info, StreamingContext context)
{
Entries = new Dictionary<string, string>();
foreach (var entry in info)
Entries.Add(entry.Name, entry.Value.ToString());
}
public void GetObjectData(SerializationInfo info, StreamingContext context)
{
foreach (var entry in Entries)
info.AddValue(entry.Key, entry.Value);
}
}
[DataContract]
public class StudentDetails
{
[DataMember]
public WebServiceDictionary StudentDetail { get; set; }
}
}
这是Service的实现
namespace RestService
{
public class RestService : IRestService
{
public string SaveStudent(StudentDetails studentDetails)
{
SqlHelper sql = new SqlHelper();
sql.OpenConnection();
WebServiceDictionary student = studentDetails.StudentDetail;
if (student.Entries.Keys.Count != 3)
{
WebOperationContext.Current.OutgoingResponse.StatusCode = System.Net.HttpStatusCode.BadRequest;
return null;
}
sql.SaveJson(student.Entries["Name"], student.Entries["Address"], int.Parse(student.Entries["Grade"]));
sql.CloseConnection();
return "Passed";
}
}
}
因此,Json的结构应为
{
"StudentDetail" :
{
"Name" : "ABC", "Address" : "ABC", "Grade":"10"
}
}
我已经检查了是否在缺少某些字段且工作正常的情况下不接受请求。现在,我希望当Json数据包含一个或多个额外信息时,请求应该失败(BadRequest)。例如,如果Json对象是:
{
"StudentDetail" :
{
"Name" : "ABC", "Address" : "ABC", "Grade":"10", "Extra" : "Item"
}
}
因为存在Extra项目,所以它应该失败(BadRequest)。 还有
{
"StudentDetail" :
{
"Name" : "ABC", "Address" : "ABC", "Grade":"10"
},
"New" : { "key" : "value" }
}
由于引入了额外的“新”项目,因此该项目将失败(BadRequest)。
请帮助我。 谢谢
答案 0 :(得分:0)
不幸的是,您无法使用wcf做到这一点。在Web api中,您仅可以使用动态对象并验证输入。但是在wcf中,您必须使用这样的对象:
[Serializable]
public class WebServiceDictionary : ISerializable
{
public Dictionary<string, string> Entries { get; }
public WebServiceDictionary()
{
Entries = new Dictionary<string, string>();
}
public WebServiceDictionary(SerializationInfo info, StreamingContext context)
{
Entries = new Dictionary<string, string>();
foreach (var entry in info)
Entries.Add(entry.Name, entry.Value.ToString());
}
public void GetObjectData(SerializationInfo info, StreamingContext context)
{
foreach (var entry in Entries)
info.AddValue(entry.Key, entry.Value);
}
}
然后您的输入将如下所示:
[DataContract]
public class StudentDetails
{
[DataMember]
public WebServiceDictionar StudentDetail { get; set; }
}
}
现在您可以像这样访问StudentDetail
:
StudentDetail.Entries[Name]
,然后进行验证。 首先,您可以像这样获得字典中的所有键:
var keys=Entries.Keys;
然后您可以像这样验证它们:
if(keys.length!=3)
//its not valid
if(!keys.contain("Address"))
//its not valid
.
.
.