#region 请求Url，不发送数据/// <summary>/// 请求Url，不发送数据/// </summary>public static string RequestUrl(string url){
return RequestUrl(url, "POST");
}
#endregion#region 请求Url，不发送数据/// <summary>/// 请求Url，不发送数据/// </summary>public static string RequestUrl(string url, string method){
// 设置参数var request = WebRequest.Create(url) as HttpWebRequest;
var cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.Method = method;
request.ContentType = "text/html";
request.Headers.Add("charset", "utf-8");
//发送请求并获取相应回应数据var response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序才开始向目标网页发送Post请求Stream responseStream = response.GetResponseStream();
var sr = new StreamReader(responseStream, Encoding.UTF8);
//返回结果网页（html）代码string content = sr.ReadToEnd();
return content;
}
#endregion #region 获取Json字符串某节点的值/// <summary>/// 获取Json字符串某节点的值/// </summary>public static string GetJsonValue(string jsonStr, string key){
string result = string.Empty;
if (!string.IsNullOrEmpty(jsonStr)){
key = """ + key.Trim('"') + """;
int index = jsonStr.IndexOf(key) + key.Length + 1;
if (index > key.Length + 1){
//先截逗号，若是最后一个，截"｝"号，取最小值int end = jsonStr.IndexOf(',', index);
if (end == -1){
end = jsonStr.IndexOf('}
', index);
}
result = jsonStr.Substring(index, end - index);
result = result.Trim(new [] {
'"', ' ', '"'}
);
//过滤引号或空格}
}
return result;
}
#endregion#region 验证Token是否过期/// <summary>/// 验证Token是否过期/// </summary>public static bool TokenExpired(string access_token){
string jsonStr =RequestUrl(string.Format("https://api.weixin.qq.com/cgi-bin/menu/get?access_token={
0}
",access_token));
if (GetJsonValue(jsonStr, "errcode") == "42001"){
return true;
}
return false;
}
#endregion#region 获取Token/// <summary>/// 获取Token/// </summary>public static string GetToken(string appid, string secret){
string strJson =RequestUrl(string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={
0}
&secret={
1}
",appid, secret));
return GetJsonValue(strJson, "access_token");
}
#endregion//获取Openidpublic static string GetOpenId(string appid, string secret, string code){
string strJson =RequestUrl(string.Format("https://api.weixin.qq.com/sns/jscode2session?appid={
0}
&secret={
1}
&js_code={
2}
&grant_type=authorization_code",appid, secret, code));
//LogUtil.WriteLog(strJson);
return GetJsonValue(strJson, "openid");
}