jQuery $ .ajax调用WCF服务返回400错误请求 [英] jQuery $.ajax call to WCF service returns 400 Bad Request
问题描述
(最后更新)
我正在使用不熟悉的技术来构思一个想法.我已经写了一些WCF服务，但是我从未做过任何高级配置.这是我第一次深入研究jQuery.前提是我创建一个WCF服务来获取要由jQuery检索的分支信息.
I'm working on an idea using unfamiliar technology. I've written a few WCF services, but I've never done any advanced configuration. This is my first dive into jQuery. The premise is I create a WCF service to get branch information, to be retrieved by jQuery.
我的第一次搜索产生了以下页面: http://www.codeproject. com/KB/aspnet/WCF_JQUERY_ASMX.aspx#2 ，我将其用作代码的基础.我最初是作为跨站点安装程序开始的，我没有考虑它是否可以使它正常工作.我搜索了堆栈溢出问题，所有帖子均未解决我的400错误请求问题.
My first search yielded this page: http://www.codeproject.com/KB/aspnet/WCF_JQUERY_ASMX.aspx#2 which I'm using as the base of my code. I initially started off as a cross-site setup, which I got rid of to see if I could just get the thing working. I've searched stack overflow and none of the posts resolve my 400 Bad Request issue.
我的web.config中的代码:
Code from my web.config:
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="GeoDataBehavior">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
<behavior name="">
<serviceMetadata httpGetEnabled="true" />
</behavior>
</serviceBehaviors>
<endpointBehaviors>
<behavior name="GDEPBehavior">
<webHttp />
</behavior>
</endpointBehaviors>
</behaviors>
<bindings>
<webHttpBinding>
<binding name="GDBinding" crossDomainScriptAccessEnabled="true"/>
</webHttpBinding>
</bindings>
<services>
<service behaviorConfiguration="GeoDataBehavior" name="GeoDataService">
<endpoint address=""
binding="webHttpBinding" contract="IGeoDataService"
behaviorConfiguration="GDEPBehavior"/>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
</service>
</services>
界面中的代码
[ServiceContract]
public interface IGeoDataService
{
[OperationContract]
[WebInvoke(Method = "POST",
BodyStyle = WebMessageBodyStyle.Wrapped,
ResponseFormat = WebMessageFormat.Json)]
List<BranchData> GetBranches();
}
// Use a data contract as illustrated in the sample below to add composite types to service operations.
[DataContract]
public class BranchData
{
[DataMember]
public string BranchNumber { get; set; }
[DataMember]
public string BranchName { get; set; }
[DataMember]
public string StreetAddress { get; set; }
[DataMember]
public string City { get; set; }
[DataMember]
public string Zip { get; set; }
[DataMember]
public string State { get; set; }
[DataMember]
public string Phone { get; set; }
[DataMember]
public string County { get; set; }
}
jQuery脚本:
<script type="text/javascript" language="javascript" src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.6.1.js">
</script>
<script type="text/javascript" language="javascript">
/* help from http://www.codeproject.com/KB/aspnet/WCF_JQUERY_ASMX.aspx
*/
var varType;
var varUrl;
var varData;
var varContentType;
var varDataType;
var varProcessData;
function CallService() {
// Thank you Bing: http://blueonionsoftware.com/blog.aspx?p=03aff202-4198-4606-b9d6-686fd13697ee
jQuery.support.cors = true;
$.ajax({
type: varType,
url: varUrl,
data: null,
crossDomain: true,
contentType: varContentType,
dataType: varDataType,
processdata: varProcessData,
success: function (msg) {
ServiceSucceeded(msg);
},
error: ServiceFailed
});
/*
$.getJSON(varUrl, null, function (msg) {
ServiceSucceeded(msg);
});
*/
}
function GetBranchDataJson() {
varType = "POST";
varUrl = "GeoDataService.svc/GetBranches";
varData = "";
varContentType = "application/json; charset=utf-8";
varDataType = "json";
varProcessData = true;
CallService();
}
function ServiceSucceeded(result) {
var ddlResult = document.getElementById("ddlResult");
for (var j = ddlResult.options.length - 1; j >= 0; j--) { ddlResult.remove(j); }
for (var i = 0; i < result.length; i++) {
var opt = document.createElement("option");
opt.text = result[i].BranchName;
ddlResult.options.add(opt);
}
}
function ServiceFailed(jqXHR, errorType, errorThrown) {
alert('error!\n' + jqXHR + '\n' + errorType + '\n' + errorThrown);
}
</script>
<input name="WTF" type="button" onclick="GetBranchDataJson()" />
您会注意到我使用的是jQuery 1.6.1，而不是本教程中的1.3.该教程可以在我的机器上正常运行，并按预期完成所有操作.不幸的是，我的代码没有.感谢您提供的所有帮助.
You'll note I'm using jQuery 1.6.1, not 1.3 from the tutorial. The tutorial runs fine on my box and does everything as expected. Unfortunately, my code does not. I appreciate any help y'all can provide.
哦，这是Fiddler的请求的副本:
Oh, and here's a copy of the request from Fiddler:
POST http://localhost:16062/GeoDataService.svc/GetBranches HTTP/1.1
Accept: application/json, text/javascript, */*; q=0.01
Content-Type: application/json; charset=utf-8
Referer: http://localhost:16062/Default.aspx
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)
Host: localhost:16062
Content-Length: 0
Connection: Keep-Alive
Pragma: no-cache
更新:好的，我作为数据查询传递了"{}"(显然，这是不向不带参数的方法传递任何东西的正确方法)，现在我得到了不受支持的媒体类型.跟踪异常为:System.ServiceModel.ProtocolException:内容类型application/json; charset = utf-8已发送到需要text/xml的服务； charset = utf-8.
Update: Ok, I passed "{}" as the Data query (apparently this is the right way to pass nothing to a method that does not take parameters), and I now get Unsupported Media Type. And the trace exception is: System.ServiceModel.ProtocolException: Content Type application/json; charset=utf-8 was sent to a service expecting text/xml; charset=utf-8.
推荐答案
The call by itself doesn't seem to have any problems - you should try to enable tracing to see why WCF is considering the incoming request to be bad. I tried a similar code as the one you have (see below) and it worked just fine. Also, since the request is coming from the same domain (localhost:16062) as the service, you don't have any cross-domain problems.
更新:基于问题评论线程的解决方案
< service>的名称"属性. web.config中的元素必须与服务类的标准名称(即名称空间+名称)相匹配(即，.svc文件中使用的值相同).否则，您将为您的服务添加一个默认端点，该端点可能不是您想要的-默认情况下，您将获得BasicHttpBinding端点，这不是您所需要的.
The "name" attribute of the <service> element in the web.config must match the fully-qualified name (i.e., the namespace + the name) of the service class (i.e., the same value used in the .svc file). Otherwise you'll get a default endpoint added for your service which may or may not be what you want - by default you get a BasicHttpBinding endpoint, which is not what you wanted in your case.
此问题是.NET Framework 4.0中添加的功能的不幸副作用:简化的配置.在.NET 3.5之前，每个服务都需要在web.config上有一个条目来对其进行配置，并且即使是最简单的应用程序(即hello world)的配置文件也很大.因此发生的事情是，从4.0开始，如果WCF找不到名称与该服务的标准名称匹配的服务元素，它将很高兴地认为您要使用默认配置.这就是为什么它刚开始与WcfTestClient一起工作的原因.
This problem is un unfortunate side effect of a feature added in .NET Framework 4.0: Simplified Configuration. Until .NET 3.5, every service needed to have an entry on web.config to configure it, and the config files for even the simplest applications (i.e., hello world) were big. So what happened is that, since 4.0, if WCF doesn't find a service element with a name which matches the fully-qualified name of the service, it will happily think that you want to use the default configuration. That's why it happens to "work" with the WcfTestClient at first.
public class StackOverflow_6526659
{
[ServiceContract]
public interface IGeoDataService
{
[OperationContract]
[WebInvoke(Method = "POST",
BodyStyle = WebMessageBodyStyle.Wrapped,
ResponseFormat = WebMessageFormat.Json)]
List<BranchData> GetBranches();
}
public class Service : IGeoDataService
{
public List<BranchData> GetBranches()
{
return new List<BranchData>();
}
}
// Use a data contract as illustrated in the sample below to add composite types to service operations.
[DataContract]
public class BranchData
{
[DataMember]
public string BranchNumber { get; set; }
[DataMember]
public string BranchName { get; set; }
[DataMember]
public string StreetAddress { get; set; }
[DataMember]
public string City { get; set; }
[DataMember]
public string Zip { get; set; }
[DataMember]
public string State { get; set; }
[DataMember]
public string Phone { get; set; }
[DataMember]
public string County { get; set; }
}
public static void Test()
{
string baseAddress = "http://" + Environment.MachineName + ":8000/Service";
ServiceHost host = new ServiceHost(typeof(Service), new Uri(baseAddress));
WebHttpBinding binding = new WebHttpBinding { CrossDomainScriptAccessEnabled = true };
WebHttpBehavior behavior = new WebHttpBehavior();
host.AddServiceEndpoint(typeof(IGeoDataService), binding, "").Behaviors.Add(behavior);
host.Open();
Console.WriteLine("Host opened");
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(baseAddress + "/GetBranches");
req.Method = "POST";
req.GetRequestStream().Close();
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
Console.WriteLine("HTTP/{0} {1} {2}", resp.ProtocolVersion, (int)resp.StatusCode, resp.StatusDescription);
foreach (var header in resp.Headers.AllKeys)
{
Console.WriteLine("{0}: {1}", header, resp.Headers[header]);
}
if (resp.ContentLength > 0)
{
Console.WriteLine(new StreamReader(resp.GetResponseStream()).ReadToEnd());
}
Console.Write("Press ENTER to close the host");
Console.ReadLine();
host.Close();
}
}
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