原文地址:http://www.cnblogs.com/woaic/p/weixin-login.htmlhtml
最近作了一個公司的微信的公衆號,對微信的流程清楚了很多,這裏記錄下,算不上多高深的,只但願能幫助到一部分人吧。數據庫
咱們公司的測試微信公衆號:NPCgo 能夠感覺下,哈哈~~json
閒話少說,開始:後端
首先你們要看下微信的API文檔。api
微信網頁受權,獲取用戶的微信官方API文檔地址:
http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html微信
三次握手
微信認證流程(我本身簡稱三次握手):
一、用戶贊成受權,獲取code
二、經過code換取網頁受權access_token,用戶openId等信息
三、經過access_token和用戶的openId獲取該用戶的用戶信息app
思路:
通過研究,我這邊的思路是:讓全部頁面都繼承同一個頁面,在這個頁面裏作微信登陸受權處理,
由於第一步必需要通過微信的登陸受權,不能網頁後端請求,因此先要通過用戶贊成,經過頁面網頁請求組裝的微信請求連接。請求該連接,
獲取code後,後端模擬請求。獲取用戶信息。dom
微信三次握手的方法(代碼)post
public class WeiXinOAuth { /// <summary> /// 獲取微信Code /// </summary> /// <param name="appId"></param> /// <param name="appSecret"></param> /// <param name="redirectUrl"></param> public string GetWeiXinCode(string appId,string appSecret,string redirectUrl) { Random r = new Random(); //微信登陸受權 //string url = "https://open.weixin.qq.com/connect/qrconnect?appid=" + appId + "&redirect_uri=" + redirectUrl +"&response_type=code&scope=snsapi_login&state=STATE#wechat_redirect"; //微信OpenId受權 //string url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + appId + "&redirect_uri=" + redirectUrl +"&response_type=code&scope=snsapi_login&state=STATE#wechat_redirect"; //微信用戶信息受權 string url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + appId + "&redirect_uri=" + redirectUrl + "&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect"; return url; } /// <summary> /// 經過code獲取access_token /// </summary> /// <param name="appId"></param> /// <param name="appSecret"></param> /// <param name="code"></param> /// <returns></returns> public Model.WeiXinAccessTokenResult GetWeiXinAccessToken(string appId,string appSecret,string code) { string url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid="+appId+"&secret="+appSecret+ "&code="+ code + "&grant_type=authorization_code"; string jsonStr = Tools.GetHttpRequest(url); Model.WeiXinAccessTokenResult result = new Model.WeiXinAccessTokenResult(); if (jsonStr.Contains("errcode")) { Model.WeiXinErrorMsg errorResult = new Model.WeiXinErrorMsg(); errorResult=JsonHelper.ParseFromJson<Model.WeiXinErrorMsg>(jsonStr); result.ErrorResult = errorResult; result.Result = false; } else { Model.WeiXinAccessTokenModel model = new Model.WeiXinAccessTokenModel(); model = JsonHelper.ParseFromJson<Model.WeiXinAccessTokenModel>(jsonStr); result.SuccessResult = model; result.Result = true; } return result; } /// <summary> /// 拉取用戶信息 /// </summary> /// <param name="accessToken"></param> /// <param name="openId"></param> /// <returns></returns> public Model.WeiXinUserInfoResult GetWeiXinUserInfo(string accessToken,string openId) { string url = "https://api.weixin.qq.com/sns/userinfo?access_token="+accessToken+"&openid="+openId+"&lang=zh_CN"; string jsonStr = Tools.GetHttpRequest(url); Model.WeiXinUserInfoResult result = new Model.WeiXinUserInfoResult(); if(jsonStr.Contains("errcode")) { Model.WeiXinErrorMsg errorResult = new Model.WeiXinErrorMsg(); errorResult = JsonHelper.ParseFromJson<Model.WeiXinErrorMsg>(jsonStr); result.ErrorMsg = errorResult; result.Result = false; } else { Model.WeiXinUserInfo userInfo = new Model.WeiXinUserInfo(); userInfo = JsonHelper.ParseFromJson<Model.WeiXinUserInfo>(jsonStr); result.UserInfo = userInfo; result.Result = true; } return result; } }
所須要的對應實體類測試
WeiXinAccessTokenResult 類:
public partial class BasePage : System.Web.UI.Page { public BasePage() { this.Page.Load += new EventHandler(Page_Load); this.Page.Unload += new EventHandler(Page_UnLoad); } protected void Page_Load(object sender, EventArgs e) { DoWith(); } protected void Page_UnLoad(object sender, EventArgs e) { } private void DoWith() { //用戶還沒有登陸 if (BLL.UserInfoManager.Instance().GetUserId() <= 0) { //獲取appId,appSecret的配置信息 string appId = System.Configuration.ConfigurationSettings.AppSettings["appid"]; string appSecret = System.Configuration.ConfigurationSettings.AppSettings["secret"]; Core.WeiXinOAuth weixinOAuth = new WeiXinOAuth(); //微信第一次握手後獲得的code 和state string _code = Cmn.Request.Get("code"); string _state = Cmn.Request.Get("state"); if (_code == "" || _code == "authdeny") { if (_code == "") { //發起受權(第一次微信握手) string _authUrl = weixinOAuth.GetWeiXinCode(appId, appSecret, HttpContext.Current.Server.UrlEncode(HttpContext.Current.Request.Url.ToString())); HttpContext.Current.Response.Redirect(_authUrl, true); } else { // 用戶取消受權 HttpContext.Current.Response.Redirect("~/Error.html", true); } } else { //獲取微信的Access_Token(第二次微信握手) Core.Model.WeiXinAccessTokenResult modelResult = weixinOAuth.GetWeiXinAccessToken(appId, appSecret, _code); //獲取微信的用戶信息(第三次微信握手) Core.Model.WeiXinUserInfoResult _userInfo = weixinOAuth.GetWeiXinUserInfo(modelResult.SuccessResult.access_token,modelResult.SuccessResult.openid); //用戶信息(判斷是否已經獲取到用戶的微信用戶信息) if (_userInfo.Result && _userInfo.UserInfo.openid != "") { //保存獲取到的用戶微信用戶信息,並保存到數據庫中 } else { GameTradingByPublic.ExceptionLog.writeFile(2, "獲取用戶OpenId失敗"); } } } } }