微信开放平台---网站授权微信登录功能（附带源码）

1 微信开放平台：https://open.weixin.qq.com/

2 微信官方教程：https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419316505&token=&lang=zh_CN

3.pc页面显示

4. 通过官方提供的文档，我们可以看出一共分4个步骤

第一步：请求CODE

第二步：通过code获取access_token

第三步：通过access_token调用接口

第4步：获取用户个人信息（UnionID机制）

 

 5.源码下载地址：http://pan.baidu.com/s/1pLyG66J

因代码加密：现贴出代码如下（下载后替换）：

Controllers--》DefaultController.cs

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Configuration;
  4 using System.Text;
  5 using System.Web;
  6 using System.Web.Mvc;
  7 
  8 using WebWeChat.Models;
  9 
 10 namespace WebWeChat.Controllers
 11 {
 12     public class DefaultController : Controller
 13     {
 14         #region 微信登录
 15 
 16         /// 

 17         /// 微信登录
 18         /// 
 19         public ActionResult WeChat()
 20         {
 21             //获得配置信息
 22             string oauthAppId = ConfigurationManager.AppSettings["oauth_app_id"];
 23             string redirectUri = ConfigurationManager.AppSettings["Redirect_uri"];
 24             if (oauthAppId == null)
 25             {
 26                 return this.Content("出错了，您尚未配置微信相关的API信息！");
 27             }
 28             string state = Guid.NewGuid().ToString().Replace("-", "");
 29             this.Session["oauth_state"] = state;
 30             string sendUrl =
 31                 "https://open.weixin.qq.com/connect/qrconnect?appid=" + oauthAppId +
 32                 "&redirect_uri=" + HttpUtility.UrlEncode(redirectUri.ToLower()) +
 33                 "&response_type=code&scope=snsapi_login&state=" + state +
 34                 "#wechat_redirect";
 35 
 36             //开始发送
 37             return this.Redirect(sendUrl); //跳转到微信自己 指定的关联登陆页面
 38         }
 39 
 40         /// 

 41         /// 微信登录返回action
 42         /// 
 43         public ActionResult WeChatReturnUrl(string state, string code)
 44         {
 45             //取得返回参数
 46 
 47             if (this.Session["oauth_state"] == null || this.Session["oauth_state"].ToString() == "" ||
 48                 state != this.Session["oauth_state"].ToString() || string.IsNullOrEmpty(code)) //若返回参数中未包含code或者state没有通过验证则提示出错
 49             {
 50                 return this.Content("出错啦，state未初始化！");
 51             }
 52 
 53             //第一步：通过code来获取Access Token以及openid
 54             Dictionary<string, object> dic1 = WeixinHelper.get_access_token(code, state);
 55             if (dic1 == null || !dic1.ContainsKey("access_token"))
 56             {
 57                 return this.Content("错误代码：，无法获取Access Token，请检查App Key是否正确！");
 58             }
 59             if (!dic1.ContainsKey("openid"))
 60             {
 61                 return dic1.ContainsKey("errmsg")
 62                     ? this.Content("errcode：" + dic1["errcode"] + ",errmsg：" + dic1["errmsg"])
 63                     : this.Content("出错啦，无法获取用户授权Openid！");
 64             }
 65 
 66             var accessToken = dic1["access_token"].ToString();
 67             var refreshToken = dic1["refresh_token"].ToString();
 68             var openid = dic1["openid"].ToString();
 69 
 70             //储存获取数据用到的信息
 71             this.Session["oauth_name"] = "webchat";
 72             this.Session["oauth_access_token"] = accessToken;
 73             this.Session["oauth_openid"] = openid;
 74             this.Session["oauth_refresh_token"] = refreshToken;
 75 
 76             #region todo 将获取到的用户信息保存到数据库中
 77 
 78             #endregion
 79 
 80             //第二步：通过Access Token以及openid来获取用户的基本信息
 81             //Dictionary dic2 = weixin_helper.get_user_info(access_token,openid);
 82 
 83             //第三步：跳转到指定页面
 84             return this.Content(this.WeChatResultJson());
 85         }
 86 
 87         /// 

 88         /// 微信登录返回action, 处理用户信息
 89         /// 
 90         public string WeChatResultJson()
 91         {
 92             if (this.Session["oauth_name"] == null || this.Session["oauth_access_token"] == null ||
 93                 this.Session["oauth_openid"] == null)
 94             {
 95                 return "{\"ret\":\"1\", \"msg\":\"出错啦，Access Token已过期或不存在！\"}";
 96             }
 97             var oauthName = this.Session["oauth_name"].ToString();
 98             var oauthAccessToken = this.Session["oauth_access_token"].ToString();
 99             var oauthOpenid = this.Session["oauth_openid"].ToString();
100             var oauthRefreshToken = this.Session["oauth_refresh_token"].ToString();
101 
102             if (!WeixinHelper.check_access_token(oauthAccessToken)) //调用access_token前需判断是否过期
103             {
104                 Dictionary<string, object> dic1 = WeixinHelper.get_refresh_token(oauthRefreshToken); //如果已过期则重新换取新的access_token
105                 if (dic1 == null || !dic1.ContainsKey("access_token"))
106                 {
107                     return "{\"openid\":\"0\", \"msg\":\"出错啦，无法获取access_token！\"}";
108                 }
109                 oauthAccessToken = dic1["access_token"].ToString();
110             }
111 
112             Dictionary<string, object> dic = WeixinHelper.get_user_info(oauthAccessToken, oauthOpenid);
113             if (dic == null)
114             {
115                 return "{\"openid\":\"0\", \"msg\":\"出错啦，无法获取授权用户信息！\"}";
116             }
117             try
118             {
119                 StringBuilder str = new StringBuilder();
120                 str.Append("{");
121                 str.Append("\"openid\": \"" + dic["openid"] + "\", ");
122                 str.Append("\"nickname\": \"" + dic["nickname"] + "\", ");
123                 str.Append("\"sex\": \"" + dic["sex"] + "\", ");
124                 str.Append("\"province\": \"" + dic["province"] + "\", ");
125                 str.Append("\"city\": \"" + dic["city"] + "\", ");
126                 str.Append("\"country\": \"" + dic["country"] + "\", ");
127                 str.Append("\"headimgurl\": \"" + dic["headimgurl"] + "\", ");
128                 str.Append("\"privilege\": \"" + dic["privilege"] + "\", ");
129                 str.Append("\"unionid\": \"" + dic["unionid"] + "\"");
130                 str.Append("\"oauth_name\": \"" + oauthName + "\"");
131                 str.Append("\"oauth_access_token\": \"" + oauthAccessToken + "\"");
132                 str.Append("\"oauth_openid\": \"" + oauthOpenid + "\"");
133                 str.Append("}");
134                 return str.ToString();
135             }
136             catch
137             {
138                 return "{\"ret\":\"0\", \"msg\":\"出错啦，无法获取授权用户信息！\"}";
139             }
140         }
141 
142         #endregion
143     }
144 }

Models---》HttpMethods

  1 using System;
  2 using System.Collections.Generic;
  3 using System.IO;
  4 using System.Net;
  5 using System.Text;
  6 
  7 namespace WebWeChat.Models
  8 {
  9     ////////////////////////////////////////////////////////////////////////////////////////////////////
 10     /// 
   A HTTP methods. 
 11     ///
 12     ///    xiaop, 2014/12/16. 
 13     ////////////////////////////////////////////////////////////////////////////////////////////////////
 14     public static class HttpMethods
 15     {
 16         #region POST
 17 
 18         /// 

 19         /// HTTP POST方式请求数据
 20         /// 
 21         /// URL.
 22         /// POST的数据
 23         /// 
 24         public static string HttpPost(string url, string param)
 25         {
 26             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
 27             request.Method = "POST";
 28             request.ContentType = "application/x-www-form-urlencoded";
 29             request.Accept = "*/*";
 30             request.Timeout = 15000;
 31             request.AllowAutoRedirect = false;
 32 
 33             string responseStr;
 34 
 35             var requestStream = new StreamWriter(request.GetRequestStream());
 36             requestStream.Write(param);
 37             requestStream.Close();
 38 
 39             var response = request.GetResponse();
 40             {
 41                 // ReSharper disable once AssignNullToNotNullAttribute
 42                 StreamReader reader = new StreamReader(stream: response.GetResponseStream(), encoding: Encoding.UTF8);
 43                 responseStr = reader.ReadToEnd();
 44                 reader.Close();
 45             }
 46 
 47             return responseStr;
 48         }
 49 
 50         #endregion
 51 
 52         #region Get
 53 
 54         /// 

 55         /// HTTP GET方式请求数据.
 56         /// 
 57         /// URL.
 58         /// 
 59         public static string HttpGet(string url)
 60         {
 61             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
 62             request.Method = "GET";
 63 
 64             //request.ContentType = "application/x-www-form-urlencoded";
 65             request.Accept = "*/*";
 66             request.Timeout = 15000;
 67             request.AllowAutoRedirect = false;
 68 
 69             string responseStr;
 70 
 71             var response = request.GetResponse();
 72 
 73             {
 74                 // ReSharper disable once AssignNullToNotNullAttribute
 75                 StreamReader reader = new StreamReader(stream: response.GetResponseStream(), encoding: Encoding.UTF8);
 76                 responseStr = reader.ReadToEnd();
 77                 reader.Close();
 78             }
 79 
 80             return responseStr;
 81         }
 82 
 83         #endregion
 84 
 85         #region Post With Pic
 86 
 87         public static string HttpPost(string url, IDictionary<object, object> param, string filePath)
 88         {
 89             string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
 90             byte[] boundarybytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
 91 
 92             HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url);
 93             wr.ContentType = "multipart/form-data; boundary=" + boundary;
 94             wr.Method = "POST";
 95             wr.KeepAlive = true;
 96             wr.Credentials = CredentialCache.DefaultCredentials;
 97 
 98             Stream rs = wr.GetRequestStream();
 99             string responseStr = null;
100 
101             string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}";
102             foreach (string key in param.Keys)
103             {
104                 rs.Write(boundarybytes, 0, boundarybytes.Length);
105                 string formitem = string.Format(formdataTemplate, key, param[key]);
106                 byte[] formitembytes = Encoding.UTF8.GetBytes(formitem);
107                 rs.Write(formitembytes, 0, formitembytes.Length);
108             }
109             rs.Write(boundarybytes, 0, boundarybytes.Length);
110 
111             string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n";
112             string header = string.Format(headerTemplate, "pic", filePath, "text/plain");
113             byte[] headerbytes = Encoding.UTF8.GetBytes(header);
114             rs.Write(headerbytes, 0, headerbytes.Length);
115 
116             FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
117             byte[] buffer = new byte[4096];
118             int bytesRead;
119             while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
120             {
121                 rs.Write(buffer, 0, bytesRead);
122             }
123             fileStream.Close();
124 
125             byte[] trailer = Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n");
126             rs.Write(trailer, 0, trailer.Length);
127             rs.Close();
128 
129             WebResponse wresp = null;
130             try
131             {
132                 wresp = wr.GetResponse();
133                 Stream stream2 = wresp.GetResponseStream();
134                 if (stream2 != null)
135                 {
136                     StreamReader reader2 = new StreamReader(stream2);
137                     responseStr = reader2.ReadToEnd();
138                 }
139 
140                 //logger.Debug(string.Format("File uploaded, server response is: {0}", responseStr));
141             }
142             catch (Exception)
143             {
144                 //logger.Error("Error uploading file", ex);
145                 if (wresp != null)
146                 {
147                     wresp.Close();
148                 }
149             }
150             return responseStr;
151         }
152 
153         #endregion
154 
155         #region Post With Pic
156 
157         /// 

158         /// HTTP POST方式请求数据(带图片)
159         /// 
160         /// URL        
161         /// POST的数据
162         /// 图片
163         /// 
164         public static string HttpPost(string url, IDictionary<object, object> param, byte[] fileByte)
165         {
166             string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
167             byte[] boundarybytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
168 
169             HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url);
170             wr.ContentType = "multipart/form-data; boundary=" + boundary;
171             wr.Method = "POST";
172             wr.KeepAlive = true;
173             wr.Credentials = CredentialCache.DefaultCredentials;
174 
175             Stream rs = wr.GetRequestStream();
176             string responseStr = null;
177 
178             string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}";
179             foreach (string key in param.Keys)
180             {
181                 rs.Write(boundarybytes, 0, boundarybytes.Length);
182                 string formitem = string.Format(formdataTemplate, key, param[key]);
183                 byte[] formitembytes = Encoding.UTF8.GetBytes(formitem);
184                 rs.Write(formitembytes, 0, formitembytes.Length);
185             }
186             rs.Write(boundarybytes, 0, boundarybytes.Length);
187 
188             string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n";
189             string header = string.Format(headerTemplate, "pic", fileByte, "text/plain"); //image/jpeg
190             byte[] headerbytes = Encoding.UTF8.GetBytes(header);
191             rs.Write(headerbytes, 0, headerbytes.Length);
192 
193             rs.Write(fileByte, 0, fileByte.Length);
194 
195             byte[] trailer = Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n");
196             rs.Write(trailer, 0, trailer.Length);
197             rs.Close();
198 
199             WebResponse wresp = null;
200             try
201             {
202                 wresp = wr.GetResponse();
203                 Stream stream2 = wresp.GetResponseStream();
204                 if (stream2 != null)
205                 {
206                     StreamReader reader2 = new StreamReader(stream2);
207                     responseStr = reader2.ReadToEnd();
208                 }
209 
210                 // logger.Error(string.Format("File uploaded, server response is: {0}", responseStr));
211             }
212             catch (Exception)
213             {
214                 //logger.Error("Error uploading file", ex);
215                 if (wresp != null)
216                 {
217                     wresp.Close();
218                 }
219             }
220             return responseStr;
221         }
222 
223         #endregion
224     }
225 }

Models---》WeixinHelper

  1 using System.Collections.Generic;
  2 using System.Configuration;
  3 
  4 using Newtonsoft.Json;
  5 
  6 namespace WebWeChat.Models
  7 {
  8     public static class WeixinHelper
  9     {
 10         #region 获得配置信息
 11 
 12         private static readonly string OauthAppId = ConfigurationManager.AppSettings["oauth_app_id"];
 13         private static readonly string OauthAppKey = ConfigurationManager.AppSettings["oauth_app_key"];
 14 
 15         #endregion
 16 
 17         /// 

 18         /// 根据AppID和AppSecret获得access token(默认过期时间为2小时)
 19         /// 
 20         /// Dictionary
 21         public static Dictionary<string, object> get_access_token()
 22         {
 23             string sendUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" +
 24                              WeixinHelper.OauthAppId + "&secret=" + WeixinHelper.OauthAppKey + "";
 25 
 26             //发送并接受返回值
 27             string result = HttpMethods.HttpGet(sendUrl);
 28             if (result.Contains("errmsg"))
 29             {
 30                 return null;
 31             }
 32             try
 33             {
 34                 Dictionary<string, object> dic = JsonConvert.DeserializeObjectstring, object>>(result);
 35                 return dic;
 36             }
 37             catch
 38             {
 39                 return null;
 40             }
 41         }
 42 
 43         /// 

 44         /// 取得临时的Access Token(默认过期时间为2小时)
 45         /// 
 46         /// 临时Authorization Code
 47         /// 防止CSRF攻击，成功授权后回调时会原样带回
 48         /// Dictionary
 49         public static Dictionary<string, object> get_access_token(string code, string state)
 50         {
 51             string sendUrl = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" +
 52                              WeixinHelper.OauthAppId + "&secret=" + WeixinHelper.OauthAppKey + "&code=" + code +
 53                              "&grant_type=authorization_code";
 54 
 55             //发送并接受返回值
 56             string result = HttpMethods.HttpGet(sendUrl);
 57             if (result.Contains("errmsg"))
 58             {
 59                 return null;
 60             }
 61             try
 62             {
 63                 Dictionary<string, object> dic = JsonConvert.DeserializeObjectstring, object>>(result);
 64                 return dic;
 65             }
 66             catch
 67             {
 68                 return null;
 69             }
 70         }
 71 
 72         /// 

 73         /// 根据access_token判断access_token是否过期
 74         /// 
 75         /// 
 76         /// true表示未失效
 77         public static bool check_access_token(string accessToken)
 78         {
 79             string sendUrl = "https://api.weixin.qq.com/sns/auth?access_token=" + accessToken + "&openid=" + WeixinHelper.OauthAppId;
 80 
 81             //发送并接受返回值
 82             string result = HttpMethods.HttpGet(sendUrl);
 83             try
 84             {
 85                 Dictionary<string, object> dic = JsonConvert.DeserializeObjectstring, object>>(result);
 86                 if (dic.ContainsKey("errmsg"))
 87                 {
 88                     return dic["errmsg"].ToString() == "ok";
 89                 }
 90                 return false;
 91             }
 92             catch
 93             {
 94                 return false;
 95             }
 96         }
 97 
 98         /// 

 99         /// 若fresh_token已过期则根据refresh_token取得新的refresh_token
100         /// 
101         /// refresh_token
102         /// Dictionary
103         public static Dictionary<string, object> get_refresh_token(string refreshToken)
104         {
105             string sendUrl =
106                 "https://api.weixin.qq.com/sns/oauth2/refresh_token?appid=" +
107                 WeixinHelper.OauthAppId + "&grant_type=refresh_token&refresh_token=" + refreshToken;
108 
109             //发送并接受返回值
110             string result = HttpMethods.HttpGet(sendUrl);
111             if (result.Contains("errmsg"))
112             {
113                 return null;
114             }
115             try
116             {
117                 return JsonConvert.DeserializeObjectstring, object>>(result);
118             }
119             catch
120             {
121                 return null;
122             }
123         }
124 
125         /// 

126         /// 获取登录用户自己的基本资料
127         /// 
128         /// 临时的Access Token
129         /// 用户openid
130         /// Dictionary
131         public static Dictionary<string, object> get_user_info(string accessToken, string openId)
132         {
133             //发送并接受返回值   
134             string sendUrl = "https://api.weixin.qq.com/sns/userinfo?access_token=" + accessToken + "&openid=" + openId;
135 
136             //发送并接受返回值
137             string result = HttpMethods.HttpGet(sendUrl);
138             if (result.Contains("errmsg"))
139             {
140                 return null;
141             }
142 
143             //反序列化JSON
144             Dictionary<string, object> dic = JsonConvert.DeserializeObjectstring, object>>(result);
145             return dic;
146         }
147     }
148 }

 

我的签名：坚持赚钱，顺便理想。

转载于:https://www.cnblogs.com/xxpeng/p/4832051.html