/// <summary>
/// 对数据进行签名
/// </summary>
/// <param name="requestMethod">请求方法.如GET或POST</param>
/// <param name="requestUrl">API请求地址</param>
/// <param name="parameters">提交参数</param>
/// <returns></returns>
public string GenerateSignature(string requestMethod, string requestUrl, Parameters parameters)
{
HMACSHA1 hmacsha1 = new HMACSHA1();
hmacsha1.Key = Encoding.UTF8.GetBytes(string.Format("{0}&{1}", Util.UrlEncode(this.AppSecret), Util.UrlEncode(this.TokenSecret)));
StringBuilder data = new StringBuilder(100);
data.AppendFormat("{0}&{1}&", requestMethod.ToUpper(), Util.UrlEncode(requestUrl));
//处理参数
if (parameters != null)
{
parameters.Sort();
data.Append(Util.UrlEncode(parameters.BuildQueryString(true)));
}
byte[] dataBuffer = System.Text.Encoding.UTF8.GetBytes(data.ToString());
byte[] hashBytes = hmacsha1.ComputeHash(dataBuffer);
return Convert.ToBase64String(hashBytes);
}
/// <summary>
/// 获取授权Token
/// </summary>
/// <param name="requestUrl">API请求地址</param>
/// <param name="parameters"></param>
/// <param name="responseEnd"></param>
/// <returns></returns>
private void GetOAuthToken(string requestUrl, Parameters parameters, Action<string, Action<string>> responseEnd, Action<string> callback)
{
this.LastError = null;
parameters.Add("oauth_consumer_key", this.AppKey);
parameters.Add("oauth_signature_method", "HMAC-SHA1");
parameters.Add("oauth_timestamp", Util.GenerateTimestamp());
parameters.Add("oauth_nonce", Util.GenerateRndNonce());
parameters.Add("oauth_version", "1.0");
parameters.Add("oauth_signature", this.GenerateSignature("GET", requestUrl, parameters));
string url = string.Concat(requestUrl, "?", parameters.BuildQueryString(true));
var request = new AsyncHttpRequest(url, this.Charset);
try
{
request.Get(responseEnd, callback);
}
catch (Exception ex)
{
this.LastError = ex;
}
}