微信是个坑货4-网页授权

功能：认证服务号通过网页授权获取用户信息

 

--公众号后台配置

》此次设置的是网页授权域名,设置成你调试的域名或者正式备案的域名（不带http或https）。

 

--自定义菜单设置

设置参数：

appid：微信公众号的appid

uri：微信网页授权后跳转的网页（该uri需经过UrlEncode编码）

scope：此处使用 snsapi_userinfo方式

关于网页授权的两种scope的区别说明

1、以snsapi_base为scope发起的网页授权，是用来获取进入页面的用户的openid的，并且是静默授权并自动跳转到回调页的。用户感知的就是直接进入了回调页（往往是业务页面）

2、以snsapi_userinfo为scope发起的网页授权，是用来获取用户的基本信息的。但这种授权需要用户手动同意，并且由于用户同意过，所以无须关注，就可在授权后获取该用户的基本信息。

 

--授权步骤

1 第一步：用户同意授权，获取code

2 第二步：通过code换取网页授权access_token

3 第三步：刷新access_token（如果需要）

4 第四步：拉取用户信息(需scope为 snsapi_userinfo)

--后台代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Xml;namespace wxweb.Areas.wechatPage.Controllers
{public class service_PersonalController : Controller{// GET: wechatPage/service_Personalpublic ActionResult Index(){//--------------微信oauth授权---------------wxPlatForm.OAuth.wechatOAuth oauth = new wxPlatForm.OAuth.wechatOAuth();oauth.appid = appid;//微信公众号的appidoauth.secret = secret;//微信公众号的AppSecretoauth.get_code();//获取token及userinfo信息if (oauth.o_user != null){//获取用户信息成功，继续逻辑业务操作
            }else{return RedirectToAction("Error", "service_Personal");}//--------------end微信oauth授权---------------return View();}}
}

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Web.Script.Serialization;namespace wxPlatForm.OAuth
{public class wechatOAuth{/// 
  /// 公众号的唯一标识  ///   public string appid;/// 
  /// 公众号的appsecret  ///   public string secret;public OAuthAccess_Token o_token;public OAuthUser o_user;private string code;/// 
/// 获取code/// public void get_code() {try{code = HttpContext.Current.Request.QueryString["Code"];if (code != ""&&code!=null) {get_access_token();}}catch (Exception ex){common.CommonMethod.WriteTxt(ex.Message);}}/// 
/// 通过code换取网页授权access_token/// public void get_access_token() {Dictionary<string, string> obj = new Dictionary<string, string>();var client = new System.Net.WebClient();var serializer = new JavaScriptSerializer();string url = string.Format("https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code", appid, secret, code);client.Encoding = System.Text.Encoding.UTF8;string dataaccess = "";try{dataaccess = client.DownloadString(url);//获取字典obj = serializer.Deserializestring, string>>(dataaccess);string accessToken = "";if (obj.TryGetValue("access_token", out accessToken))  //判断access_Token是否存在
                {o_token =new OAuthAccess_Token {access_token=obj["access_token"],expires_in =Convert.ToInt32( obj["expires_in"]),refresh_token = obj["refresh_token"],openid = obj["openid"],scope = obj["scope"]};if (o_token.scope == "snsapi_userinfo") {get_userinfo(o_token.access_token, o_token.openid);}}else  //access_Token 失效时重新发送。
                {//存log方法common.CommonMethod.WriteTxt("access_token 获取失败，time："+DateTime.Now.ToLongTimeString());}}catch (Exception e){//存log方法
                common.CommonMethod.WriteTxt(e.Message);}}/// 
/// 拉取用户信息(需scope为 snsapi_userinfo)/// /// 网页授权接口调用凭证,注意：此access_token与基础支持的access_token不同///     用户的唯一标识public void get_userinfo(string access_token,string openid) {Dictionary<string, object> obj = new Dictionary<string, object>();var client = new System.Net.WebClient();JavaScriptSerializer serializer = new JavaScriptSerializer();string url = string.Format("https://api.weixin.qq.com/sns/userinfo?access_token={0}&openid={1}&lang=zh_CN", access_token, openid);client.Encoding = System.Text.Encoding.UTF8;string dataaccess = "";try{dataaccess = client.DownloadString(url);obj = serializer.Deserializestring, object>>(dataaccess);object user_openid = "";if (obj.TryGetValue("openid", out user_openid))  //判断access_Token是否存在
                {o_user = new OAuthUser{openid = obj["openid"].ToString(),nickname = obj["nickname"].ToString(),sex =Convert.ToInt32( obj["sex"]),province = obj["province"].ToString(),city = obj["city"].ToString(),country = obj["country"].ToString(),headimgurl = obj["headimgurl"].ToString(),privilege =obj["privilege"].ToString(),unionid =""};}else  //access_Token 失效时重新发送。
                {//存log方法common.CommonMethod.WriteTxt("用户信息 获取失败，time：" + DateTime.Now.ToLongTimeString());}}catch (Exception e){//存log方法
                common.CommonMethod.WriteTxt(e.Message);}}/// 
/// 检验授权凭证（access_token）是否有效/// /// 公众号的唯一标识  /// 填写通过access_token获取到的refresh_token参数public void refresh_access_token(string refresh_token) {Dictionary<string, string> obj = new Dictionary<string, string>();var client = new System.Net.WebClient();var serializer = new JavaScriptSerializer();string url = string.Format("https://api.weixin.qq.com/sns/oauth2/refresh_token?appid={0}&grant_type=refresh_token&refresh_token={1}", this.appid, refresh_token);client.Encoding = System.Text.Encoding.UTF8;string dataaccess = "";try{dataaccess = client.DownloadString(url);//获取字典obj = serializer.Deserializestring, string>>(dataaccess);string accessToken = "";if (obj.TryGetValue("access_token", out accessToken))  //判断access_Token是否存在
                {OAuthAccess_Token o_token = new OAuthAccess_Token{access_token = obj["access_token"],expires_in = Convert.ToInt32(obj["expires_in"]),refresh_token = obj["refresh_token"],openid = obj["openid"],scope = obj["scope"]};if (o_token.scope == "snsapi_userinfo"){get_userinfo(o_token.access_token, o_token.openid);}}else  //access_Token 失效时重新发送。
                {//存log方法common.CommonMethod.WriteTxt("access_token 获取失败，time：" + DateTime.Now.ToLongTimeString());}}catch (Exception e){//存log方法
                common.CommonMethod.WriteTxt(e.Message);}}/// 
/// 刷新access_token（如果需要）/// public void check_access_token(){}}
}

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace wxPlatForm.OAuth
{public class OAuthAccess_Token{public string access_token { get; set; }public int expires_in { get; set; }public string refresh_token { get; set; }/// 
  /// 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  ///   public string openid { get; set; }public string scope { get; set; }/// 
  /// 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  ///   public string unionid { get; set; }}
}

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace wxPlatForm.OAuth
{/// 
  /// 授权之后获取用户基本信息  ///   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; }/// 
  /// 用户特权信息，json 数组  ///   //public JArray privilege { get; set; }public string privilege { get; set; }public string unionid { get; set; }}
}

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Web;
using System.Web.Script.Serialization;namespace common
{/// 
/// 通用方法类/// public class CommonMethod{#region 记录bug，以便调试/// 
/// 记录bug，以便调试/// public static bool WriteTxt(string str){try{string LogPath = HttpContext.Current.Server.MapPath("/err_log/");if (!Directory.Exists(LogPath)){Directory.CreateDirectory(LogPath);}FileStream FileStream = new FileStream(System.Web.HttpContext.Current.Server.MapPath("/err_log//xiejun_" + DateTime.Now.ToLongDateString() + "_.txt"), FileMode.Append);StreamWriter StreamWriter = new StreamWriter(FileStream);//开始写入
                StreamWriter.WriteLine(str);//清空缓冲区
                StreamWriter.Flush();//关闭流
                StreamWriter.Close();FileStream.Close();}catch (Exception){return false;}return true;}#endregion}
}