/// <summary>
/// 微信网页授权，如果用户同意授权，页面将跳转至 redirect_uri/?code=CODE&state=STATE。
/// </summary>
/// <param name="redirect_uri">授权后重定向的回调链接地址</param>
/// <param name="state">重定向后会带上state参数，开发者可以填写a-zA-Z0-9的参数值，最多128字节</param>
/// <param name="scope">应用授权作用域</param>
/// <returns></returns>
public static string OAuthToURL(string redirect_uri, string state = "", scope scope = scope.snsapi_base)
{
if (string.IsNullOrWhiteSpace(redirect_uri))
{
throw new ArgumentException("参数值无效", nameof(redirect_uri));
}
return(string.Format("https://open.weixin.qq.com/connect/oauth2/authorize?appid={0}&redirect_uri={1}&response_type=code&scope={2}&state={3}#wechat_redirect"
, Privacy.AppId
, HttpUtility.UrlEncode(redirect_uri)
, scope.ToString()
, state
));
}
/// <summary>
/// 引导用户进入授权页面同意授权，获取code
/// 如果用户同意授权，页面将跳转至 redirect_uri/?code=CODE&state=STATE。
/// 若用户禁止授权，则重定向后不会带上code参数，仅会带上state参数redirect_uri?state=STATE
/// （注意：重定向后会带上state参数，开发者可以填写a-zA-Z0-9的参数值）
/// </summary>
/// <param name="redirect_uri">目标页面URL（不包含页面参数）</param>
/// <param name="scope">应用授权作用域</param>
/// <param name="state">重定向后会带上state参数，开发者可以填写a-zA-Z0-9的参数值</param>
/// <returns></returns>
public static string OAuthToURL(string redirect_uri, scope scope, string state)
{
if (string.IsNullOrEmpty(redirect_uri))
{
throw new Exception("redirect_uri 为必填参数！");
}
if (scope == null)
{
scope = scope.snsapi_login;
}
if (string.IsNullOrEmpty(state))
{
state = string.Empty;
}
return(string.Format("https://open.weixin.qq.com/connect/qrconnect?appid={0}&redirect_uri={1}&response_type=code&scope={2}&state={3}#wechat_redirect"
, Privacy.AppId
, HttpUtility.UrlEncode(redirect_uri)
, scope.ToString()
, state
));
}
/// <summary>
/// 第一步：用户同意授权，获取code
/// </summary>
/// <param name="cope"></param>
/// <param name="state"></param>
/// <returns></returns>
public string GetAuthorizeURL(scope cope, string state)
{
string url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + Appid + "&redirect_uri=" + CallbackUrl + "&response_type=" + code + "&scope=" + cope.ToString() + "&state=" + state + "#wechat_redirect";
return(url);
}