微信网页授权操作逻辑封装-C#实例

一、微信网页授权登录

前提：

1.已经获取的接口权限，如果是测试账号就已经有权限了

2.配置接口的授权域名

更多说明可以参考：http://blog.csdn.net/u011127019/article/details/44698233

或者官网API：http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html

步骤：

1.用户同意授权，获取code

2.根据code 获取access_token及当前操作用户的openid、unionid

3.根据openid获取用户基本信息(如果需要的话)

注：如果想在网站使用扫一扫，授权登录，可以讲 _oauth.GetCodeUrl() 授权地址生成二维码来使用

C#封装微信网页授权登录使用实例：

string appid = "wx145b4a8fd07b24e8";
string appsecrect = "fe6951dcb99772411c42f724b1336065";
string redirect_url = "配置域名下的回调地址";
OAuthManage _oauth = null;
/// <summary>
///控制器构造函数
/// </summary>
public UserController()
{
_oauth = new OAuthManage(appid, appsecrect, redirect_url);
}
/// <summary>
/// 授权登录
/// </summary>
/// <returns></returns>
public ActionResult AuthLogin()
{
ViewBag.url = _oauth.GetCodeUrl();
return View();
}
/// <summary>
/// 回调处理
/// </summary>
/// <returns></returns>
public ActionResult OAuthHandle()
{
string result = "";
//注册事件处理
_oauth.OnError = (e) =>
{
string msg = "";
Exception inner = e;
while (inner != null)
{
msg += inner.Message;
inner = inner.InnerException;
}
result = msg;
LogOperate.Write(msg);
};
_oauth.OnGetTokenSuccess = (token) =>
{
result += "<br/>";
result += token.ToJsonString();
};
_oauth.OnGetUserInfoSuccess = (user) =>
{
result += "<br/>";
result += user.ToJsonString();
};
//第二步
_oauth.GetAccess_Token();
//第三步
_oauth.GetUserInfo();
//显示结果
ViewBag.msg = result;
return View();
}

封装代码类定义：

namespace WXPackage
{
/// <summary>
/// 网页授权逻辑处理，
/// 处理三步操作，处理成功，返回用户基本信息
/// </summary>
public class OAuthManage
{
#region 基本信息定义
/// <summary>
/// 公众号的唯一标识
/// </summary>
private string appid;
/// <summary>
/// 公众号的appsecret
/// </summary>
private string secret;
/// <summary>
/// 回调url地址
/// </summary>
private string redirect_uri;
/// <summary>
/// 获取微信用户基本信息使用snsapi_userinfo模式
/// 如果使用静默授权，无法获取用户基本信息但可以获取到openid
/// </summary>
private string scope;
public OAuthManage(string appid, string appsecret, string redirect_uri, bool IsUserInfo = true)
{
this.appid = appid;
this.secret = appsecret;
this.redirect_uri = redirect_uri;
this.scope = IsUserInfo ? "snsapi_userinfo" : "snsapi_base";
}
#endregion

#region 请求过程信息
/// <summary>
/// 第一步获取到的Code 值
/// </summary>
public string Code { get; set; }
/// <summary>
/// 第二步获取到的access_token及相关数据
/// </summary>
public OAuthAccess_Token TokenData = null;
#endregion

#region 事件定义
/// <summary>
/// 当处理出现异常时，触发
/// </summary>
public Action<Exception> OnError = null;
/// <summary>
/// 当获取AccessToken成功是触发
/// </summary>
public Action<OAuthAccess_Token> OnGetTokenSuccess = null;
/// <summary>
/// 当获取用户信息成功时触发
/// </summary>
public Action<OAuthUser> OnGetUserInfoSuccess = null;
#endregion

#region 第二步,回调处理
/// <summary>
/// 第二步，通过code换取网页授权access_token
/// </summary>
public void GetAccess_Token()
{
try
{
//1.处理跳转
this.Code = ReqHelper.GetString("code");
if (string.IsNullOrEmpty(this.Code))
throw new Exception("获取code参数失败或用户禁止授权获取基本信息");
//1.发送获取access_token请求
string url = GetAccess_TokenUrl();
string result = NetHelper.Get(url);

//2.解析相应结果
TokenData = JsonConvert.DeserializeObject<OAuthAccess_Token>(result);
if (TokenData == null)
throw new Exception("反序列化结果失败，返回内容为：" + result);
//3.获取成功
if (OnGetTokenSuccess != null)
OnGetTokenSuccess(TokenData);
}
catch (Exception ex)
{
Error("第二步，通过code换取网页授权access_token异常", ex);
}
}
/// <summary>
/// 刷新当前access_token
/// </summary>
public OAuthAccess_Token RefreshAccess_Token()
{
try
{
//1.发送请求
string url = GetReferesh_TokenUrl();
string result = NetHelper.Get(url);
//2.解析结果
OAuthAccess_Token token = JsonConvert.DeserializeObject<OAuthAccess_Token>(result);
if (token == null)
throw new Exception("反序列化结果失败，返回内容：" + result);
return token;
}
catch (Exception ex)
{
Error("刷新当前access_token失败", ex);
return null;
}
}
#endregion

#region 第三步，获取用户基本信息
/// <summary>
/// 第三步，获取基本信息
/// </summary>
public void GetUserInfo()
{
try
{
//1.发送get请求
string url = GetUserInfoUrl();
string result = NetHelper.Get(url);
//2.解析结果
OAuthUser user = JsonConvert.DeserializeObject<OAuthUser>(result);
if (user == null)
throw new Exception("反序列化结果失败，返回内容：" + result);
//3.获取成功
if (OnGetUserInfoSuccess != null)
OnGetUserInfoSuccess(user);
}
catch (Exception ex)
{
Error("第三步、获取用户基本信息异常", ex);
}
}
#endregion

#region 静态方法
/// <summary>
/// 验证授权凭证是否有效
/// </summary>
/// <param name="access_token">access_token</param>
/// <param name="openid">用户针对当前公众号的openid</param>
/// <returns></returns>
public static bool CheckWebAccess_Token(string access_token, string openid)
{
try
{
string url = string.Format("https://api.weixin.qq.com/sns/auth?access_token={0}&openid={1}",
access_token,
openid);
string result = NetHelper.Get(url);
JObject obj = JObject.Parse(result);
int errcode = (int)obj["errcode"];
return errcode == 0;
}
catch (Exception ex)
{
throw new Exception("，" + ex.Message);
}
}
#endregion

#region 获取请求连接
/// <summary>
/// 获取Code的url 地址
/// </summary>
/// <returns></returns>
public string GetCodeUrl()
{
string url = string.Format("https://open.weixin.qq.com/connect/oauth2/authorize?appid={0}&redirect_uri={1}&response_type=code&scope={2}&state=STATE#wechat_redirect",
this.appid,
SecurityHelper.UrlEncode(this.redirect_uri),
this.scope);
return url;
}
/// <summary>
/// 获取access_token的url地址
/// </summary>
/// <returns></returns>
private string GetAccess_TokenUrl()
{
string url = string.Format("https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code",
this.appid,
this.secret,
this.Code);
return url;
}
/// <summary>
/// 获取刷新AccessToke的地址
/// </summary>
/// <returns></returns>
private string GetReferesh_TokenUrl()
{
string url = string.Format("https://api.weixin.qq.com/sns/oauth2/refresh_token?appid={0}&grant_type=refresh_token&refresh_token={1}",
this.appid,
this.TokenData.refresh_token
);
return url;
}
/// <summary>
/// 获取用户基本信息地址
/// </summary>
/// <returns></returns>
private string GetUserInfoUrl()
{
string url = string.Format("https://api.weixin.qq.com/sns/userinfo?access_token={0}&openid={1}&lang=zh_CN",
this.TokenData.access_token,
this.TokenData.openid);
return url;
}
#endregion
private void Error(string msg, Exception inner)
{
if (this.OnError != null)
{
this.OnError(new Exception(msg, inner));
}
}
}
/// <summary>
/// 授权之后获取用户基本信息
/// </summary>
public class OAuthUser
{
public string openid { get; set; }
public string nickname { get; set; }
public int sex { get; set; }
public string province { get; set; }
public string city { get; set; }
public string country { get; set; }
public string headimgurl { get; set; }
/// <summary>
/// 用户特权信息，json 数组
/// </summary>
public JArray privilege { get; set; }
public string unionid { get; set; }
}
/// <summary>
/// 获取Access_Token或者刷新返回的数据对象
/// </summary>
public class OAuthAccess_Token
{
public string access_token { get; set; }
public int expires_in { get; set; }
public string refresh_token { get; set; }
/// <summary>
/// 用户针对当前公众号的唯一标识
/// 关注后会产生，返回公众号下页面也会产生
/// </summary>
public string openid { get; set; }
public string scope { get; set; }
/// <summary>
/// 当前用户的unionid，只有在用户将公众号绑定到微信开放平台帐号后
/// </summary>
public string unionid { get; set; }
}
}

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QQ登陆，获取QQ用户信息

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