如果要以面向对象的方式向每个WCF调用中添加自定义HTTP标头，则无需赘述。
就像Mark Good和paulwhit的答案一样，我们需要子类化IClientMessageInspector以将自定义HTTP标头注入WCF请求。但是，通过接受包含我们要添加的标头的字典，使检查器更通用：
public class HttpHeaderMessageInspector : IClientMessageInspector
{
private Dictionary<string, string> Headers;
public HttpHeaderMessageInspector(Dictionary<string, string> headers)
{
Headers = headers;
}
public object BeforeSendRequest(ref Message request, IClientChannel channel)
{
// ensure the request header collection exists
if (request.Properties.Count == 0 || request.Properties[HttpRequestMessageProperty.Name] == null)
{
request.Properties.Add(HttpRequestMessageProperty.Name, new HttpRequestMessageProperty());
}
// get the request header collection from the request
var HeadersCollection = ((HttpRequestMessageProperty)request.Properties[HttpRequestMessageProperty.Name]).Headers;
// add our headers
foreach (var header in Headers) HeadersCollection[header.Key] = header.Value;
return null;
}
// ... other unused interface methods removed for brevity ...
}
就像Mark Good和paulwhit的回答一样，我们需要子类化IEndpointBehavior才能将其注入HttpHeaderMessageInspector到WCF客户中。
public class AddHttpHeaderMessageEndpointBehavior : IEndpointBehavior
{
private IClientMessageInspector HttpHeaderMessageInspector;
public AddHttpHeaderMessageEndpointBehavior(Dictionary<string, string> headers)
{
HttpHeaderMessageInspector = new HttpHeaderMessageInspector(headers);
}
public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
{
clientRuntime.ClientMessageInspectors.Add(HttpHeaderMessageInspector);
}
// ... other unused interface methods removed for brevity ...
}
完成面向对象方法的最后一部分是创建WCF自动生成的客户端的子类（我使用Microsoft的《WCF Web服务参考指南》来生成WCF客户端）。
就我而言，我需要将API密钥附加到x-api-keyHTML标头。
子类执行以下操作：
- 使用所需的参数调用基类的构造函数（在我的情况下
EndpointConfiguration，生成了一个枚举以传递给构造函数-也许您的实现没有这个）
- 定义应附加到每个请求的标头
- 重视
AddHttpHeaderMessageEndpointBehavior客户的Endpoint行为
public class Client : MySoapClient
{
public Client(string apiKey) : base(EndpointConfiguration.SomeConfiguration)
{
var headers = new Dictionary<string, string>
{
["x-api-key"] = apiKey
};
var behaviour = new AddHttpHeaderMessageEndpointBehavior(headers);
Endpoint.EndpointBehaviors.Add(behaviour);
}
}
最后，使用您的客户！
var apiKey = 'XXXXXXXXXXXXXXXXXXXXXXXXX';
var client = new Client (apiKey);
var result = client.SomeRequest()
产生的HTTP请求应包含您的HTTP标头，如下所示：
POST http://localhost:8888/api/soap HTTP/1.1
Cache-Control: no-cache, max-age=0
Connection: Keep-Alive
Content-Type: text/xml; charset=utf-8
Accept-Encoding: gzip, deflate
x-api-key: XXXXXXXXXXXXXXXXXXXXXXXXX
SOAPAction: "http://localhost:8888/api/ISoapService/SomeRequest"
Content-Length: 144
Host: localhost:8888
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
<s:Body>
<SomeRequestxmlns="http://localhost:8888/api/"/>
</s:Body>
</s:Envelope>