public string ToString(SignatureGrouping grouping)
{
string result = Value.ToString(SignatureGrouping.None);
return(grouping == SignatureGrouping.Parentheses
? result.Enclose("(", ")")
: result.Enclose("[", "]"));
}
/// <summary>
/// 使用请求拦截器，为每个请求自动添加基于 https://tools.ietf.org/html/draft-cavage-http-signatures 的签名。
/// </summary>
/// <param name="httpClientBuilder"></param>
/// <param name="signatureGenerator"></param>
/// <param name="parameterGenerator"></param>
/// <returns></returns>
public static IHttpClientBuilder UseHttpSignatureInterceptor(this IHttpClientBuilder httpClientBuilder, ISignatureGenerator signatureGenerator, Func <IHttpRequest, ISigningParameter> parameterGenerator)
{
if (signatureGenerator == null)
{
throw new ArgumentNullException(nameof(signatureGenerator));
}
if (parameterGenerator == null)
{
throw new ArgumentNullException(nameof(parameterGenerator));
}
return(httpClientBuilder.AddRequestInterceptor(request =>
{
ISigningParameter signingParameter = parameterGenerator.Invoke(request);
ISignature signature = signatureGenerator.Sign(request.ToSigningRequest(), signingParameter);
request.AddHeader("Signature", signature.ToString(SignatureFormatting.Signature));
request.AddHeader("Authorization", signature.ToString(SignatureFormatting.Authorization));
}));
}