在借鉴前两篇获取微信用户基本信息的基础下,本人也总结整理了一些个人笔记:如何通过OAuth2.0获取微信用户信息
1、首先在某微信平台下配置OAuth2.0授权回调页面:
2、通过appid构造url获取微信回传code值(appid可在微信平台下找到)
1)、微信不弹出授权页面url:
A、code回传到页面wxProcess2.aspx,不带参数
Response.Redirect("=" + appid + "&redirect_uri=http://localhost:8888/wxProcess2.aspx&response_type=code&scope=snsapi_base&state=1#wechat_redirect");
B、code回传到页面wxProcess2.aspx,带参数reurl,即wxProcess2.aspx获得code的同时,也能获取reurl的值,具体如下:
Response.Redirect("=" + appid + "&redirect_uri=http://localhost:8888/wxProcess2.aspx?reurl=" + reurl +"&response_type=code&scope=snsapi_base&state=1#wechat_redirect");
2)、微信弹出授权页面url:需要用户授权,才能获取code及后面需要获取的用户信息
Response.Redirect("=" + appid + "&redirect_uri=http://localhost:8888/wxProcess2.aspx?reurl=" + reurl + "&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect");
说明:微信是否弹出授权页面url的区别只在一个参数scope,不弹出微信授权页面:scope=snsapi_base,弹出微信授权页面:scope=snsapi_userinfo。
微信授权页面如下:
3、通过appid、secret、code构造url,获取微信用户的openid和access token。appid、secret可在微信平台下找到,code已在上面方法中获取并回传。具体访问url:
=" + appid + "&secret=" + appsecret + "&code=" + Code + "&grant_type=authorization_code
4、通过openid、access token获取用户信息,具体访问url:
=" + REFRESH_TOKEN + "&openid=" + OPENID
说明:主要通过访问微信的3个url地址并回传数据,获取微信用户基本信息
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具体代码:
1、获取微信code处理页面:wxProcess.aspx
protected void Page_Load(object sender, EventArgs e)
{ if (!IsPostBack) { string reurl = ""; //传递参数,获取用户信息后,可跳转到自己定义的页面,想怎么处理就怎么处理 if (Request.QueryString["reurl"] != null && Request.QueryString["reurl"] != "") { reurl = Request.QueryString["reurl"].ToString(); } else { reurl = ""; }string code = "";
//弹出授权页面(如在不弹出授权页面基础下未获得openid,则弹出授权页面,提示用户授权)
if (Request.QueryString["auth"] != null && Request.QueryString["auth"] != "" && Request.QueryString["auth"] == "1") { Response.Redirect("=" + appid + "&redirect_uri=http://localhost:8888/wxProcess2.aspx?reurl=" + reurl + "&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect"); } else { //不弹出授权页面 Response.Redirect("=" + appid + "&redirect_uri=http://localhost:8888/wxProcess2.aspx?reurl=" + reurl + "&response_type=code&scope=snsapi_base&state=1#wechat_redirect"); } } }
2、获取微信code值回传到自己的页面wxProcess2.aspx:
public string reurl = "";
protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { //获取从wxProcess.aspx传递过来的跳转地址reurl if (Request.QueryString["reurl"] != null && Request.QueryString["reurl"] != "") { reurl = Request.QueryString["reurl"].ToString(); }string code = "";
if (Request.QueryString["code"] != null && Request.QueryString["code"] != "") { //获取微信回传的code code = Request.QueryString["code"].ToString(); OAuth_Token Model = Get_token(code); //获取token OAuthUser OAuthUser_Model = Get_UserInfo(Model.access_token, Model.openid ); if(OAuthUser_Model.openid!=null && OAuthUser_Model.openid !="") //已获取得openid及其他信息 { //在页面上输出用户信息 Response.Write("用户OPENID:" + OAuthUser_Model.openid + "用户昵称:" + OAuthUser_Model.nickname + "性别:" + OAuthUser_Model.sex + "所在省:" + OAuthUser_Model.province + "所在市:" + OAuthUser_Model.city + "所在国家:" + OAuthUser_Model.country + "头像地址:" + OAuthUser_Model.headimgurl + "用户特权信息:" + OAuthUser_Model.privilege); //或跳转到自己的页面,想怎么处理就怎么处理 Response.Redirect(reurl); } else //未获得openid,回到wxProcess.aspx,访问弹出微信授权页面 { Response.Redirect("wxProcess.aspx?auth=1"); } } } }
#region 属性
public string appid = "wx6669e231bffa123f"; //公众微信平台下可以找到 public string appsecret = "9d693f7a81236c123464281115p78445"; //公众微信平台下可以找到 #endregion
//根据appid,secret,code获取微信openid、access token信息
protected OAuth_Token Get_token(string Code) { //获取微信回传的openid、access token string Str = GetJson("=" + appid + "&secret=" + appsecret + "&code=" + Code + "&grant_type=authorization_code"); //微信回传的数据为Json格式,将Json格式转化成对象 OAuth_Token Oauth_Token_Model = JsonHelper.ParseFromJson(Str); return Oauth_Token_Model; }//刷新Token(好像这个刷新Token没有实际作用)
protected OAuth_Token refresh_token(string REFRESH_TOKEN) { string Str = GetJson("=" + appid + "&grant_type=refresh_token&refresh_token=" + REFRESH_TOKEN); OAuth_Token Oauth_Token_Model = JsonHelper.ParseFromJson(Str); return Oauth_Token_Model; }//根据openid,access token获得用户信息
protected OAuthUser Get_UserInfo(string REFRESH_TOKEN, string OPENID) { string Str = GetJson("=" + REFRESH_TOKEN + "&openid=" + OPENID); OAuthUser OAuthUser_Model = JsonHelper.ParseFromJson(Str); return OAuthUser_Model; }//访问微信url并返回微信信息
protected string GetJson(string url) { WebClient wc = new WebClient(); wc.Credentials = CredentialCache.DefaultCredentials; wc.Encoding = Encoding.UTF8; string returnText = wc.DownloadString(url);if (returnText.Contains("errcode"))
{ //可能发生错误 } return returnText; } /// /// token类 /// public class OAuth_Token { public OAuth_Token() {//
//TODO: 在此处添加构造函数逻辑 // } //access_token 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 //expires_in access_token接口调用凭证超时时间,单位(秒) //refresh_token 用户刷新access_token //openid 用户唯一标识,请注意,在未关注公众号时,用户访问公众号的网页,也会产生一个用户和公众号唯一的OpenID //scope 用户授权的作用域,使用逗号(,)分隔 public string _access_token; public string _expires_in; public string _refresh_token; public string _openid; public string _scope; public string access_token { set { _access_token = value; } get { return _access_token; } } public string expires_in { set { _expires_in = value; } get { return _expires_in; } }public string refresh_token
{ set { _refresh_token = value; } get { return _refresh_token; } } public string openid { set { _openid = value; } get { return _openid; } } public string scope { set { _scope = value; } get { return _scope; } }}
///
/// 用户信息类 /// public class OAuthUser { public OAuthUser() { } #region 数据库字段 private string _openID; private string _searchText; private string _nickname; private string _sex; private string _province; private string _city; private string _country; private string _headimgUrl; private string _privilege; #endregion#region 字段属性
/// /// 用户的唯一标识 /// public string openid { set { _openID = value; } get { return _openID; } } /// /// /// public string SearchText { set { _searchText = value; } get { return _searchText; } } /// /// 用户昵称 /// public string nickname { set { _nickname = value; } get { return _nickname; } } /// /// 用户的性别,值为1时是男性,值为2时是女性,值为0时是未知 /// public string sex { set { _sex = value; } get { return _sex; } } /// /// 用户个人资料填写的省份 /// public string province { set { _province = value; } get { return _province; } } /// /// 普通用户个人资料填写的城市 /// public string city { set { _city = value; } get { return _city; } } /// /// 国家,如中国为CN /// public string country { set { _country = value; } get { return _country; } } /// /// 用户头像,最后一个数值代表正方形头像大小(有0、46、64、96、132数值可选,0代表640*640正方形头像),用户没有头像时该项为空 /// public string headimgurl { set { _headimgUrl = value; } get { return _headimgUrl; } } /// /// 用户特权信息,json 数组,如微信沃卡用户为(chinaunicom)其实这个格式称不上JSON,只是个单纯数组 /// public string privilege { set { _privilege = value; } get { return _privilege; } } #endregion }///
/// 将Json格式数据转化成对象 /// public class JsonHelper { /// /// 生成Json格式 /// /// /// /// public static string GetJson(T obj) { DataContractJsonSerializer json = new DataContractJsonSerializer(obj.GetType()); using (MemoryStream stream = new MemoryStream()) { json.WriteObject(stream, obj); string szJson = Encoding.UTF8.GetString(stream.ToArray()); return szJson; } } /// /// 获取Json的Model /// /// /// /// public static T ParseFromJson(string szJson) { T obj = Activator.CreateInstance(); using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(szJson))) { DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType()); return (T)serializer.ReadObject(ms); } } }
输出微信用户信息: