Question

这practical Haskell example鼓励我安装Visual Studio 2012试用版以使用F＃类型的提供程序。但是，我完全不知道如何使用它来解决这个问题。有一个RCSB SOAP web service。我使用RCSB中的WSDL Web服务的URL复制了an example（由于Web服务API已更改，因此无效）：

open Microsoft.FSharp.Data.TypeProviders

type pdb = WsdlService<"http://www.rcsb.org/pdb/services/pdbws?wsdl">

do
    let ws = pdb.Getpdbws()
    ws.getCurrentPdbIds()
    |> printfn "%A"

但是这会在运行时因错误而崩溃：

Unhandled Exception: System.InvalidOperationException: RPC Message blastPDBRequest1 in operation blastPDB1 has an invalid body name blastPDB. It must be blastPDB1
   at System.ServiceModel.Description.XmlSerializerOperationBehavior.Reflector.OperationReflector.EnsureMessageInfos()
   at System.ServiceModel.Description.XmlSerializerOperationBehavior.Reflector.EnsureMessageInfos()
   at System.ServiceModel.Description.XmlSerializerOperationBehavior.CreateFormatter()
   at System.ServiceModel.Description.XmlSerializerOperationBehavior.System.ServiceModel.Description.IOperationBehavior.ApplyClientBehavior(OperationDescription description, ClientOperation proxy)
   at System.ServiceModel.Description.DispatcherBuilder.BindOperations(ContractDescription contract, ClientRuntime proxy, DispatchRuntime dispatch)
   at System.ServiceModel.Description.DispatcherBuilder.ApplyClientBehavior(ServiceEndpoint serviceEndpoint, ClientRuntime clientRuntime)
   at System.ServiceModel.Description.DispatcherBuilder.BuildProxyBehavior(ServiceEndpoint serviceEndpoint, BindingParameterCollection& parameters)
   at System.ServiceModel.Channels.ServiceChannelFactory.BuildChannelFactory(ServiceEndpoint serviceEndpoint, Boolean useActiveAutoClose)
   at System.ServiceModel.ChannelFactory.CreateFactory()
   at System.ServiceModel.ChannelFactory.OnOpening()
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.ChannelFactory.EnsureOpened()
   at System.ServiceModel.ChannelFactory`1.CreateChannel(EndpointAddress address, Uri via)
   at System.ServiceModel.ChannelFactory`1.CreateChannel()
   at System.ServiceModel.ClientBase`1.CreateChannel()
   at System.ServiceModel.ClientBase`1.CreateChannelInternal()
   at System.ServiceModel.ClientBase`1.get_Channel()
   at Program.pdb.ServiceTypes.PdbWebServiceClient.getCurrentPdbIds()
   at Program.pdb.ServiceTypes.SimpleDataContextTypes.PdbWebServiceClient.getCurrentPdbIds()
   at <StartupCode$ConsoleApplication2>.$Program.main@() in c:\users\jon\documents\visual studio 11\Projects\ConsoleApplication2\ConsoleApplication2\Program.fs: line 5

此外，SOAP web service已被弃用，转而使用a RESTful one。我如何使用F＃3.0中的那个？最简单的工作示例是什么样的？

Answer 1

看起来操作BlastPDB被重载并且TypeProvider使用的底层生成代码没有正确支持它（它没有在主体名称上放置“1”）。直接使用Svcutil时，请参阅此答案以了解同一问题WCF: Svcutil generates invalid client proxy, Apache AXIS Web Service, overload operations - 此页面显示Type Provider uses svcutil internally。

AFAIK您将无法使用类型提供程序访问REST服务，因为REST服务不提供架构（请参阅此答案F# Type Providers and REST apis）。您可能不得不回退REST客户端库（请参阅此处.NET Rest Client Frameworks中的一些选项）或执行原始HTTP。

最简单的工作示例是什么样的？

以下是使用List all current PDB IDs REST API获取当前PDB ID列表的简单示例（我相信这相当于您使用Web服务尝试的调用）。您需要添加对System.Net.Http。

的引用

open System.Net.Http
open System.Threading.Tasks

[<EntryPoint>]
let main argv = 

    use httpClient = new HttpClient()
    let task = httpClient.GetStringAsync("http://www.rcsb.org/pdb/rest/getCurrent")
    printfn "%s" task.Result

    0

从F＃3.0询问蛋白质数据库

1 个答案: