/// <summary>
/// 生成预签名头信息
/// </summary>
/// <param name="builder">http 请求信息</param>
/// <param name="contentSha256">http content 计算过 hmac sha256 的内容信息</param>
/// <returns>预签名头信息字符串</returns>
private string CreateCanonicalRequest(SdkHttpFullRequestBuilder builder, string contentSha256)
{
string parameters = builder.GetParameters();
#if NET35
if (!string.IsNullOrEmpty(parameters) && !string.IsNullOrEmpty(parameters.Trim()))
#else
if (!string.IsNullOrWhiteSpace(parameters))
#endif
{
if (parameters.StartsWith("?"))
{
parameters = parameters.Substring(1);
}
}
string path = SdkHttpUtils.AppendUri(builder.GetEndpoint().AbsolutePath, builder.GetResourcePath());
string canonicalRequest = new StringBuilder(builder.GetHttpMethod().ToString().ToUpper())
.Append(ParameterConstant.LINE_SEPARATOR)
.Append(GetCanonicalizedResourcePath(path, _doubleUrlEncode))
.Append(ParameterConstant.LINE_SEPARATOR)
.Append(parameters)
.Append(ParameterConstant.LINE_SEPARATOR)
.Append(GetCanonicalizedHeaderString(builder))
.Append(ParameterConstant.LINE_SEPARATOR)
.Append(GetSignedHeadersString(builder))
.Append(ParameterConstant.LINE_SEPARATOR)
.Append(contentSha256)
.ToString();
return(canonicalRequest);
}
/// <summary>
/// 添加头信息
/// </summary>
/// <param name="builder">http请求信息</param>
private void AddHostHeader(ref SdkHttpFullRequestBuilder builder)
{
var endPoint = builder.GetEndpoint();
if (endPoint == null)
{
throw new ArgumentNullException(" can not get the uri from de SdkHttpFullRequestBuilder , please check the param set ");
}
StringBuilder hostHeaderBuilder = new StringBuilder(endPoint.Host);
if (SdkHttpUtils.IsUsingNonDefaultPort(endPoint))
{
hostHeaderBuilder.Append(":").Append(endPoint.Port);
}
builder.Header(ParameterConstant.HOST, hostHeaderBuilder.ToString());
string contentSha256 = CalculateContentHash(builder);
}
/// <summary>
/// 进行请求path 转换
/// </summary>
/// <param name="path">请求path</param>
/// <param name="doubleUrlEncode">是否进行二次编码</param>
/// <returns>转换后的path</returns>
protected string GetCanonicalizedResourcePath(string path, bool doubleUrlEncode)
{
#if NET35
if (string.IsNullOrEmpty(path) || string.IsNullOrEmpty(path.Trim()))
#else
if (string.IsNullOrWhiteSpace(path))
#endif
{
return("/");
}
else
{
string value = doubleUrlEncode ? SdkHttpUtils.UrlEncode(path, true) : path;
if (value.StartsWith("/"))
{
return(value);
}
else
{
return($"/{value}");
}
}
}
/// <summary>
/// 进行签名操作
/// </summary>
/// <param name="signRequest">http请求信息</param>
/// <returns>返回签名后的需要添加的HTTP header 信息</returns>
public Dictionary <string, string> Sign(SignRequest signRequest)
{
Dictionary <string, string> header = new Dictionary <string, string>();
// v4signer
JdCloudSigner signer = new JdCloudSigner();
signer.SetRegionName(signRequest.Region);
signer.SetServiceName(signRequest.ServiceName);
String nonceId = Guid.NewGuid().ToString().ToLower();
//the default http request mothed is `GET`
SdkHttpMethod method = SdkHttpMethod.GET;
#if NET35
if (!string.IsNullOrEmpty(signRequest.RequestMothed) && !string.IsNullOrEmpty(signRequest.RequestMothed.Trim()))
{
method = (SdkHttpMethod)Enum.Parse(typeof(SdkHttpMethod), signRequest.RequestMothed.ToUpper());
}
#else
if (!string.IsNullOrWhiteSpace(signRequest.RequestMothed))
{
if (!Enum.TryParse <SdkHttpMethod>(signRequest.RequestMothed.ToUpper(), out method))
{
throw new ArgumentException("the http request mothed cast fail , not support .");
}
}
#endif
Uri endPoint = new Uri(signRequest.Host);
// Builder
#if NET35
string signRequestContent = string.IsNullOrEmpty(signRequest.RequestContent) || string.IsNullOrEmpty(signRequest.RequestContent.Trim()) ? null : signRequest.RequestContent;
SdkHttpFullRequestBuilder reqBuilder = DefaultSdkHttpFullRequest.Builder()
.HttpMethod(method)
.Endpoint(endPoint)
.ResourcePath(SdkHttpUtils.UrlEncode(signRequest.Path, true))
.Header(ParameterConstant.X_JDCLOUD_NONCE, nonceId)
// .Header(ParameterConstant.CONTENT_TYPE, signRequest.ContentType)
.Content(signRequestContent)
.QueryParameter(signRequest.QueryParam);
#else
SdkHttpFullRequestBuilder reqBuilder = DefaultSdkHttpFullRequest.Builder()
.HttpMethod(method)
.Endpoint(endPoint)
.ResourcePath(SdkHttpUtils.UrlEncode(signRequest.Path, true))
.Header(ParameterConstant.X_JDCLOUD_NONCE, nonceId)
// .Header(ParameterConstant.CONTENT_TYPE, signRequest.ContentType)
.Content(string.IsNullOrWhiteSpace(signRequest.RequestContent) ? null : signRequest.RequestContent)
.QueryParameter(signRequest.QueryParam);
#endif
//对http header 进行处理， 如果 请求为get head delete 默认不放置content-type 签名内不包含content-type
if (method != SdkHttpMethod.GET && method != SdkHttpMethod.DELETE && method != SdkHttpMethod.HEAD)
{
reqBuilder.Header(ParameterConstant.CONTENT_TYPE, signRequest.ContentType);
header.Add(ParameterConstant.CONTENT_TYPE, signRequest.ContentType);
}
// sign
SdkHttpFullRequest signed = signer.Sign(reqBuilder, new Credentials(signRequest.Credentials.AccessKeyId(), signRequest.Credentials.SecretAccessKey()));
var signedHeader = signed.GetHeaders();
header.Add(ParameterConstant.X_JDCLOUD_NONCE, nonceId);
header.Add(ParameterConstant.X_JDCLOUD_DATE, signedHeader[ParameterConstant.X_JDCLOUD_DATE][0]);
header.Add(ParameterConstant.AUTHORIZATION, signedHeader[ParameterConstant.AUTHORIZATION][0]);
foreach (var item in signedHeader)
{
if (!header.ContainsKey(item.Key))
{
header.Add(item.Key, item.Value[0]);
}
}
return(header);
}
