Question

I have a WCF Rest service that i am try to test with the Firefox Rest Client,

The signature of the method i am calling is

        [WebInvoke(Method = "POST", UriTemplate = "UploadEvidenceData/{userName}/{password}/{cdb}")]
    public EvidenceData UploadEvidenceData(string userName, string password, string cdb, EvidenceData evidence)

The Data Contract for evidence is

    [DataContract(Name = "EvidenceData", Namespace = "http://StudentEvidence.com")]
public class EvidenceData
{
    [DataMember]
    public string LearnerID { get; set; }

    [DataMember]
    public string UnitID { get; set; }

    [DataMember]
    public string AssessorID { get; set; }

    [DataMember]
    public int MethodO { get; set; }  //int

    [DataMember]
    public int MethodEwt { get; set; }  //int

    [DataMember]
    public int MethodEp { get; set; }  //int

    [DataMember]
    public int MethodQc { get; set; }  //int

    [DataMember]
    public int MethodEps { get; set; }  //int

    [DataMember]
    public int MethodPd { get; set; }  //int

    [DataMember]
    public int MethodS { get; set; }  //int

    [DataMember]
    public int MethodEwa { get; set; }  //int

    [DataMember]
    public int MethodEch { get; set; }  //int

    [DataMember]
    public int MethodEwe { get; set; }  //int

    [DataMember]
    public int MethodApel { get; set; }  //int

    [DataMember]
    public int EvidenceID { get; set; }  //int

    [DataMember]
    public string EvidenceFileName { get; set; }

    [DataMember]
    public int EvidenceFileSize { get; set; }  //int

    [DataMember]
    public string EvidenceDescription { get; set; }

    [DataMember]
    public string AssessorFeedback { get; set; }

    [DataMember]
    public string Signature { get; set; }

    [DataMember]
    public int RequirementID { get; set; }  //int

    [DataMember]
    public int ModuleID { get; set; }  //int

    public EvidenceData()
    {
        this.LearnerID = string.Empty;
        this.UnitID = string.Empty;
        this.AssessorID = string.Empty;
        this.MethodO = 0;
        this.MethodEwt = 0;
        this.MethodEp = 0;
        this.MethodQc = 0;
        this.MethodEps = 0;
        this.MethodPd = 0;
        this.MethodS = 0;
        this.MethodEwa = 0;
        this.MethodEch = 0;
        this.MethodEwe = 0;
        this.MethodApel = 0;
        this.EvidenceID = 0;
        this.EvidenceFileName = string.Empty;
        this.EvidenceFileSize = 0;
        this.EvidenceDescription = string.Empty;
        this.AssessorFeedback = string.Empty;
        this.Signature = null;
        this.RequirementID = 0;
        this.ModuleID = 0;
    }
}

and when i use the client use the address http://something.com/Service/UploadEvidence/user/pass/mydb

and in the body i put

{"AssessorFeedback":"Nothing to report","AssessorID":"32fac8c2-0f9b-4cad-a2e4-55b06e968da0","EvidenceDescription":"some evidence","EvidenceFileName":"Lighthouse.jpg","EvidenceFileSize":561276,"EvidenceID":0,"LearnerID":"61b9eca6-6c3e-4bd3-8963-69d9ad3e5eeb","MethodApel":0,"MethodEch":0,"MethodEp":0,"MethodEps":0,"MethodEwa":0,"MethodEwe":0,"MethodEwt":0,"MethodO":0,"MethodPd":0,"MethodQc":0,"MethodS":0,"ModuleID":1131,"RequirementID":30476,"Signature":null,"UnitID":"c33ea6e1-ac54-46dc-a512-3a2efafd5a0b"}

and i have custom header of application/json

This all works fine from a .net client, but not from the rest client plugin of firefox 400 everytime.

any help is very much appreciated

Don

My Web config File

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <system.web>
    <httpRuntime maxRequestLength="2147483647"/>
    <compilation debug="true" targetFramework="4.0">
      <assemblies>
        <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
      </assemblies>
    </compilation>
  </system.web>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true">
      <add name="UrlRoutingModule" type="System.Web.Routing.UrlRoutingModule, System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
    </modules>
  </system.webServer>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
    <standardEndpoints>
      <webHttpEndpoint>
        <standardEndpoint name=""
                          helpEnabled="true"
                          automaticFormatSelectionEnabled="true"
                          defaultOutgoingResponseFormat="Json"
                          maxReceivedMessageSize="2147483647"
                          maxBufferSize="2147483647"
                          transferMode="Buffered" />

      </webHttpEndpoint>
    </standardEndpoints>
    <services></services>
  </system.serviceModel>
</configuration>

Answer 1

400 often means wrong Http method. Does the Firefox client use GET (which would require a different attribute on your method, and a tweak to your web.config to allow web get), or are you certain it’s POST?

Also, check this content-type issue: Why does my C# client, POSTing to my WCF REST service, return (400) Bad Request?

Also see if adding RequestFormat = WebMessageFormat.Json to the [WebInvoke] attribute decorating your service method helps. I think this defaults to xml, which is probably what the .NET client sends. http://msdn.microsoft.com/en-us/library/system.servicemodel.web.webinvokeattribute.requestformat.aspx