c# - 将 wsa 标头添加到 SOAP 调用

Question

在调用 SOAP WS 时，我们必须在 SOAP 标头中指定 wsa。它看起来像这样：

            <env:Header xmlns:wsa="http://www.w3.org/2005/08/addressing">
                           <wsa:To env:mustUnderstand="true">_enpoint_</wsa:To>
                           <wsa:Action>_action_</wsa:Action>
            </env:Header>

我们已经使用 wsdl.exe 从 wsdl 自动生成代理

为了避免修改自动生成的代码，我想添加一个新的部分类来完成这项工作。我喜欢这种方法，所以我最终得到了这段代码：

public partial class WebserviceProxy
{
    private const string DEFAULT_WSA_NAMESPACE = "wsa";

    private string _wsaNamespace;

    public string WsaNamespace
    {
        get => _wsaNamespace ?? (_wsaNamespace = DEFAULT_WSA_NAMESPACE);
        set => _wsaNamespace = value;
    }

    public string To { get; set; }

    public string Action { get; set; }

    protected override WebRequest GetWebRequest(Uri uri)
    {
        WebRequest request = base.GetWebRequest(uri);

        request.Headers.Add($"{WsaNamespace}:{nameof(To)}", To);
        request.Headers.Add($"{WsaNamespace}:{nameof(Action)}", Action);

        return request;
    }
}

问题是此代码不起作用，并且在调用时出现异常base.GetWebRequest(uri)：

System.ArgumentException: Specified value has invalid HTTP Header characters.
Parameter name: name
   at System.Net.WebHeaderCollection.CheckBadChars(String name, Boolean isHeaderValue)
   at System.Net.WebHeaderCollection.Add(String name, String value)
   at IcamWebserviceProxy.GetWebRequest(Uri uri)

由于我不确定我是否走在正确的轨道上，所以我在这里寻求帮助。

即使解决了上述问题，我仍然必须将正确的 wsa 命名空间指定为 Heder 属性。

[编辑] URI（针对在同一台机器上运行的 SoapUI 端点进行测试）：

-       uri {http://localhost:9000/mockDataExchangeAdminservice}    System.Uri
        AbsolutePath    "/mockDataExchangeAdminservice" string
        AbsoluteUri "http://localhost:9000/mockDataExchangeAdminservice"    string
        AllowIdn    false   bool
        Authority   "localhost:9000"    string
        DnsSafeHost "localhost" string
        Fragment    ""  string
        HasAuthority    true    bool
        Host    "localhost" string
        HostNameType    Dns System.UriHostNameType
        HostType    DnsHostType System.Uri.Flags
        IdnHost "localhost" string
        IsAbsoluteUri   true    bool
        IsDefaultPort   false   bool
        IsDosPath   false   bool
        IsFile  false   bool
        IsImplicitFile  false   bool
        IsLoopback  true    bool
        IsNotAbsoluteUri    false   bool
        IsUnc   false   bool
        IsUncOrDosPath  false   bool
        IsUncPath   false   bool
        LocalPath   "/mockDataExchangeAdminservice" string
        OriginalString  "http://localhost:9000/mockDataExchangeAdminservice"    string
        OriginalStringSwitched  false   bool
        PathAndQuery    "/mockDataExchangeAdminservice" string
        Port    9000    int
        PrivateAbsolutePath "/mockDataExchangeAdminservice" string
        Query   ""  string
        Scheme  "http"  string
        SecuredPathIndex    0   ushort
+       Segments    {string[2]} string[]
+       Syntax  {System.UriParser.BuiltInUriParser} System.UriParser {System.UriParser.BuiltInUriParser}
        UserDrivenParsing   false   bool
        UserEscaped false   bool
        UserInfo    ""  string
        m_DnsSafeHost   null    string
        m_Flags DnsHostType | AuthorityFound | LoopbackHost | NotDefaultPort | MinimalUriInfoSet | AllUriInfoSet | HostUnicodeNormalized | RestUnicodeNormalized    System.Uri.Flags
+       m_Info  {System.Uri.UriInfo}    System.Uri.UriInfo
        m_String    "http://localhost:9000/mockDataExchangeAdminservice"    string
+       m_Syntax    {System.UriParser.BuiltInUriParser} System.UriParser {System.UriParser.BuiltInUriParser}
        m_iriParsing    true    bool
        m_originalUnicodeString null    string
+       Static members  

HttpWebClientProtocol.GetWebRequest[edit2]返回 webRequest 时抛出异常（最后一行）：

protected override WebRequest GetWebRequest(Uri uri)
{
  WebRequest webRequest = base.GetWebRequest(uri);
  HttpWebRequest httpWebRequest = webRequest as HttpWebRequest;
  if (httpWebRequest != null)
  {
    httpWebRequest.UserAgent = this.UserAgent;
    httpWebRequest.AllowAutoRedirect = this.allowAutoRedirect;
    httpWebRequest.AutomaticDecompression = this.enableDecompression ? DecompressionMethods.GZip : DecompressionMethods.None;
    httpWebRequest.AllowWriteStreamBuffering = true;
    httpWebRequest.SendChunked = false;
    if (this.unsafeAuthenticatedConnectionSharing != httpWebRequest.UnsafeAuthenticatedConnectionSharing)
      httpWebRequest.UnsafeAuthenticatedConnectionSharing = this.unsafeAuthenticatedConnectionSharing;
    if (this.proxy != null)
      httpWebRequest.Proxy = this.proxy;
    if (this.clientCertificates != null && this.clientCertificates.Count > 0)
      httpWebRequest.ClientCertificates.AddRange(this.clientCertificates);
    httpWebRequest.CookieContainer = this.cookieJar;
  }
  return webRequest;
}