/// <summary>
/// 根据AppKey,SecretKey、Url、参数计算Sk
/// </summary>
/// <param name="ak"></param>
/// <param name="sk"></param>
/// <param name="url"></param>
/// <param name="querystring_arrays"></param>
/// <returns></returns>
public static string CaculateAKSN(string ak, string sk, string url, IDictionary <string, string> querystring_arrays)
{
var queryString = MapAssistantUtil.HttpBuildQuery(querystring_arrays);
var str = MapAssistantUtil.UrlEncode(url + "?" + queryString + sk);
return(MD5(str));
}
/// <summary>
/// 构建查询字符串
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="request"></param>
/// <returns></returns>
public virtual string BuildQueryString <TResponse>(IRequest <TResponse> request)
where TResponse : IResponse
{
var dictionary = BuildQueryParameter(request);
return(MapAssistantUtil.HttpBuildQuery(dictionary));
}
/// <summary>
/// 给定 Model 的属性和值;
/// </summary>
/// <returns></returns>
public virtual Dictionary <string, string> GetParameters()
{
var result = MapAssistantUtil.GetDictionary(model);
if (RequiredTimestamp)
{
// 用户未设置timestamp时自动增加，若已经设置timestamp，则使用用户设置的值
if (!result.ContainsKey("timestamp"))
{
result.Add("timestamp", DateTime.Now.ToTimestamp().ToString());
}
}
return(result);
}
/// <summary>
/// 构建SN查询字符串
/// http://lbsyun.baidu.com/index.php?title=webapi/appendix
/// 计算sn跟参数对出现顺序有关，get请求请使用LinkedHashMap保存<key,value>，
/// 该方法根据key的插入顺序排序；
/// post请使用TreeMap保存<key,value>，该方法会自动将key按照字母a-z顺序排序。
/// 所以get请求可自定义参数顺序（sn参数必须在最后）发送请求，
/// 但是post请求必须按照字母a-z顺序填充body（sn参数必须在最后）。
/// 以get请求为例：http://api.map.baidu.com/geocoder/v2/?address=百度大厦&output=json&ak=yourak，paramsMap中先放入address，
/// 再放output，然后放ak，
/// 放入顺序必须跟get请求中对应参数的出现顺序保持一致。
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="request"></param>
/// <returns></returns>
public static string BuildQueryStringWithAkAndSn <T>(IRequest <T> request, string ak, string sk)
where T : IResponse
{
var dictionary = request.GetParameters();
// ak 必须是 dictionary中的最后一个参数
if (dictionary.ContainsKey("ak"))
{
dictionary.Remove("ak");
}
dictionary.Add("ak", ak);
// 计算sn时 dictionary不能有 sn
if (dictionary.ContainsKey("sn"))
{
dictionary.Remove("sn");
}
var sn = CaculateAKSN(ak, sk, request.Address, dictionary);
dictionary.Add("sn", sn);
var querystring = MapAssistantUtil.HttpBuildQuery(dictionary);
return(querystring);
}