ASP.NET Web API 基本身份验证授权标头

我有一个BasicAuthenticationAttribute检查请求中的 Authorization 标头，但尽管它存在，它仍然认为 Authorization 标头为空：

public class BasicAuthenticationAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(HttpActionContext actionContext)
    {
        if (actionContext.Request.Headers.Authorization == null)
        {
            actionContext.Response = new HttpResponseMessage(HttpStatusCode.Unauthorized);
        }

        ...

如果我检查actionContext.Request.Headers我可以看到Authorization listed:

{Connection: Keep-Alive
Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: en-gb
Authorization: REDACTED_BUT_PRESENT==
Host: localhost:44300
Referer: https://localhost:44300/
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; InfoPath.3; .NET4.0E)
}

Update

我刚刚检查了完整的请求标头，它们看起来像这样...我可以在第一部分中看到授权标头，但第二部分中的授权标头显然为空。

请求头

{Connection: Keep-Alive
Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: en-gb
Authorization: REDACTED_BUT_PRESENT==
Host: localhost:1734
Referer: http://localhost:1734/
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; InfoPath.3; .NET4.0E)
}
    base {System.Net.Http.Headers.HttpHeaders}: {Connection: Keep-Alive
Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: en-gb
Authorization: VXNlcjpQYXNzd29yZA==
Host: localhost:1734
Referer: http://localhost:1734/
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; InfoPath.3; .NET4.0E)
}
    Accept: {*/*}
    AcceptCharset: {}
    AcceptEncoding: {gzip, deflate}
    AcceptLanguage: {en-gb}
    Authorization: null
    CacheControl: null
    ... removed for brevity ...
    Warning: {}

如果您遇到困难，可以使用以下方法获取标头：

var header = request.Headers.FirstOrDefault(h => h.Key.Equals("Authorization"));

但不是通过

var header = request.Headers.Authorization;