public static bool CheckSign(SortedDictionary <string, object> sortedDictionary, string key)
{
//如果没有设置签名，则跳过检测
object obj;
sortedDictionary.TryGetValue("sign", out obj);
if (obj == null)
{
WxLogHelper.Error(typeof(WxPayHelper).ToString(), "WxPayData签名不存在!");
throw new WxPayException("WxPayData签名不存在!");
}
//如果设置了签名但是签名为空，则抛异常
else if (sortedDictionary["sign"] == null || sortedDictionary["sign"].ToString() == "")
{
WxLogHelper.Error(typeof(WxPayHelper).ToString(), "WxPayData签名存在但不合法!");
throw new WxPayException("WxPayData签名存在但不合法!");
}
//获取接收到的签名
string return_sign = sortedDictionary["sign"].ToString();
//在本地计算新的签名
string cal_sign = MakeSign(sortedDictionary, key);
if (cal_sign == return_sign)
{
return(true);
}
WxLogHelper.Error(typeof(WxPayHelper).ToString(), "WxPayData签名验证错误!");
throw new WxPayException("WxPayData签名验证错误!");
}
public static string MakeSign(SortedDictionary <string, object> sortedDictionary, string key)
{
string buff = "";
foreach (KeyValuePair <string, object> pair in sortedDictionary)
{
if (pair.Value == null)
{
WxLogHelper.Error(typeof(WxPayHelper).ToString(), "WxPayData内部含有值为null的字段!");
throw new WxPayException("WxPayData内部含有值为null的字段!");
}
if (pair.Key != "sign" && pair.Value.ToString() != "")
{
buff += pair.Key + "=" + pair.Value + "&";
}
}
buff = buff.Trim('&');
//在string后加入API KEY
buff += "&key=" + key;
//MD5加密
var md5 = MD5.Create();
var bs = md5.ComputeHash(Encoding.UTF8.GetBytes(buff));
var sb = new StringBuilder();
foreach (byte b in bs)
{
sb.Append(b.ToString("x2"));
}
//所有字符转为大写
return(sb.ToString().ToUpper());
}
public static string ToXml(SortedDictionary <string, object> sortedDictionary)
{
//数据为空时不能转化为xml格式
if (0 == sortedDictionary.Count)
{
WxLogHelper.Error(typeof(WxPayHelper).ToString(), "WxPayData数据为空!");
throw new WxPayException("WxPayData数据为空!");
}
string xml = "<xml>";
foreach (KeyValuePair <string, object> pair in sortedDictionary)
{
//字段值不能为null，会影响后续流程
if (pair.Value == null)
{
WxLogHelper.Error(typeof(WxPayHelper).ToString(), "WxPayData内部含有值为null的字段!");
throw new WxPayException("WxPayData内部含有值为null的字段!");
}
if (pair.Value.GetType() == typeof(int))
{
xml += "<" + pair.Key + ">" + pair.Value + "</" + pair.Key + ">";
}
else if (pair.Value.GetType() == typeof(string))
{
xml += "<" + pair.Key + ">" + "<![CDATA[" + pair.Value + "]]></" + pair.Key + ">";
}
else//除了string和int类型不能含有其他数据类型
{
WxLogHelper.Error(typeof(WxPayHelper).ToString(), "WxPayData字段数据类型错误!");
throw new WxPayException("WxPayData字段数据类型错误!");
}
}
xml += "</xml>";
return(xml);
}
public static string Post(string url, string xml, int timeout)
{
System.GC.Collect(); //垃圾回收，回收没有正常关闭的http连接
string result = ""; //返回结果
HttpWebRequest request = null;
HttpWebResponse response = null;
Stream reqStream = null;
try
{
//设置最大连接数
ServicePointManager.DefaultConnectionLimit = 200;
//设置https验证方式
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback =
new RemoteCertificateValidationCallback(CheckValidationResult);
}
/***************************************************************
* 下面设置HttpWebRequest的相关属性
* ************************************************************/
request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "POST";
request.Timeout = timeout * 1000;
//设置POST的数据类型和长度
request.ContentType = "text/xml";
byte[] data = System.Text.Encoding.UTF8.GetBytes(xml);
request.ContentLength = data.Length;
//往服务器写入数据
reqStream = request.GetRequestStream();
reqStream.Write(data, 0, data.Length);
reqStream.Close();
//获取服务端返回
response = (HttpWebResponse)request.GetResponse();
//获取服务端返回数据
StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
result = sr.ReadToEnd().Trim();
sr.Close();
}
catch (System.Threading.ThreadAbortException e)
{
WxLogHelper.Error("HttpService", "Thread - caught ThreadAbortException - resetting.");
WxLogHelper.Error("Exception message: {0}", e.Message);
System.Threading.Thread.ResetAbort();
}
catch (WebException e)
{
WxLogHelper.Error("HttpService", e.ToString());
if (e.Status == WebExceptionStatus.ProtocolError)
{
WxLogHelper.Error("HttpService", "StatusCode : " + ((HttpWebResponse)e.Response).StatusCode);
WxLogHelper.Error("HttpService", "StatusDescription : " + ((HttpWebResponse)e.Response).StatusDescription);
}
throw new WxPayException(e.ToString());
}
catch (Exception e)
{
WxLogHelper.Error("HttpService", e.ToString());
throw new WxPayException(e.ToString());
}
finally
{
//关闭连接和流
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
}
return(result);
}