功能：認證服務號通過網頁授權獲取用戶信息

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--公眾號后臺配置

》此次設置的是網頁授權域名,設置成你調試的域名或者正式備案的域名（不帶http或https）。

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--自定義菜單設置

設置參數：

appid：微信公眾號的appid

uri：微信網頁授權后跳轉的網頁（該uri需經過UrlEncode編碼）

scope：此處使用 snsapi_userinfo方式

關于網頁授權的兩種scope的區別說明

1、以snsapi_base為scope發起的網頁授權，是用來獲取進入頁面的用戶的openid的，并且是靜默授權并自動跳轉到回調頁的。用戶感知的就是直接進入了回調頁（往往是業務頁面）

2、以snsapi_userinfo為scope發起的網頁授權，是用來獲取用戶的基本信息的。但這種授權需要用戶手動同意，并且由于用戶同意過，所以無須關注，就可在授權后獲取該用戶的基本信息。

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--授權步驟

1 第一步：用戶同意授權，獲取code
2 第二步：通過code換取網頁授權access_token
3 第三步：刷新access_token（如果需要）
4 第四步：拉取用戶信息(需scope為 snsapi_userinfo)

--后臺代碼

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授權---------------wxPlatForm.OAuth.wechatOAuth oauth = new wxPlatForm.OAuth.wechatOAuth();oauth.appid = appid;//微信公眾號的appidoauth.secret = secret;//微信公眾號的AppSecretoauth.get_code();//獲取token及userinfo信息if (oauth.o_user != null){//獲取用戶信息成功，繼續邏輯業務操作
            }else{return RedirectToAction("Error", "service_Personal");}//--------------end微信oauth授權---------------return View();}}
}

網頁授權接入頁面

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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{/// <summary>  /// 公眾號的唯一標識  /// </summary>  public string appid;/// <summary>  /// 公眾號的appsecret  /// </summary>  public string secret;public OAuthAccess_Token o_token;public OAuthUser o_user;private string code;/// <summary>/// 獲取code/// </summary>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);}}/// <summary>/// 通過code換取網頁授權access_token/// </summary>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);//獲取字典obj = serializer.Deserialize<Dictionary<string, string>>(dataaccess);string accessToken = "";if (obj.TryGetValue("access_token", out accessToken))  //判斷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 失效時重新發送。
                {//存log方法common.CommonMethod.WriteTxt("access_token 獲取失敗，time："+DateTime.Now.ToLongTimeString());}}catch (Exception e){//存log方法
                common.CommonMethod.WriteTxt(e.Message);}}/// <summary>/// 拉取用戶信息(需scope為 snsapi_userinfo)/// </summary>/// <param name="access_token">網頁授權接口調用憑證,注意：此access_token與基礎支持的access_token不同</param>/// <param name="access_token">    用戶的唯一標識</param>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.Deserialize<Dictionary<string, object>>(dataaccess);object user_openid = "";if (obj.TryGetValue("openid", out user_openid))  //判斷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 失效時重新發送。
                {//存log方法common.CommonMethod.WriteTxt("用戶信息 獲取失敗，time：" + DateTime.Now.ToLongTimeString());}}catch (Exception e){//存log方法
                common.CommonMethod.WriteTxt(e.Message);}}/// <summary>/// 檢驗授權憑證（access_token）是否有效/// </summary>/// <param name="appid">公眾號的唯一標識</param>  /// <param name="refresh_token">填寫通過access_token獲取到的refresh_token參數</param>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);//獲取字典obj = serializer.Deserialize<Dictionary<string, string>>(dataaccess);string accessToken = "";if (obj.TryGetValue("access_token", out accessToken))  //判斷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 失效時重新發送。
                {//存log方法common.CommonMethod.WriteTxt("access_token 獲取失敗，time：" + DateTime.Now.ToLongTimeString());}}catch (Exception e){//存log方法
                common.CommonMethod.WriteTxt(e.Message);}}/// <summary>/// 刷新access_token（如果需要）/// </summary>public void check_access_token(){}}
}

網頁授權接入-調用wechatOAuth

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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; }/// <summary>  /// 用戶針對當前公眾號的唯一標識  /// 關注后會產生，返回公眾號下頁面也會產生  /// </summary>  public string openid { get; set; }public string scope { get; set; }/// <summary>  /// 當前用戶的unionid，只有在用戶將公眾號綁定到微信開放平臺帳號后  /// </summary>  public string unionid { get; set; }}
}

網頁授權接入-調用OAuthAccess_Token

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace wxPlatForm.OAuth
{/// <summary>  /// 授權之后獲取用戶基本信息  /// </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>  /// 用戶特權信息，json 數組  /// </summary>  //public JArray privilege { get; set; }public string privilege { get; set; }public string unionid { get; set; }}
}

網頁授權接入-調用OAuthUser

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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
{/// <summary>/// 通用方法類/// </summary>public class CommonMethod{#region 記錄bug，以便調試/// <summary>/// 記錄bug，以便調試/// </summary>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);//開始寫入
                StreamWriter.WriteLine(str);//清空緩沖區
                StreamWriter.Flush();//關閉流
                StreamWriter.Close();FileStream.Close();}catch (Exception){return false;}return true;}#endregion}
}

寫日志

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轉載于:https://www.cnblogs.com/eye-like/p/9276529.html

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