微信内的webview中获取微信用户的基本信息（open_id）

来源：互联网发布：二手跳蚤市场淘宝编辑：程序博客网时间：2024/05/16 10:19

前提：

已经开启高级接口的微信公众号（服务号为优）

微信的oauth

（其他方式都行不通：url参数太危险，session不能被保存，event=view类型的事件不能动态改变key(url)等等。。。）

过程：

应用授权作用域，snsapi_base

http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html

1. 设置自定义菜单链接地址

类似：https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx*********&redirect_uri=http%3A%2F%2Fwx.edaysoft.cn%2Fhome%2Ftest&response_type=code&scope=snsapi_base&state=yunnying#wechat_redirect

2. redirect_uri获取code和state

3. HttpWebRequest获取openid和token

4.结束。或是其他想要深入的东西

//redirect_uri的地址public ActionResult Test(){    string code = Request.QueryString["code"];    string state = Request.QueryString["state"];    string msg = "";    if (string.IsNullOrEmpty(code))    {        msg = "用户禁止授权";    }    string url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + "wx********************"        + "&secret=" + "SSSSSSSSSSSSSSSSSSSSSSSS"         + "&code=" + code        + "&grant_type=authorization_code";    HttpWebResponse response = this.GetRestfulResponse(url);    if (response.StatusCode == HttpStatusCode.OK)    {        using (StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8))        {            string responseString = sr.ReadToEnd();            wxopenidjsonobject obj = JsonConvert.DeserializeObject<wxopenidjsonobject>(responseString);            msg = obj.openid;        }    }    if (string.IsNullOrWhiteSpace(msg))    {        msg = "sth wrong.";    }    ViewBag.from = msg;    return View();}private HttpWebResponse GetRestfulResponse(string url, int timeout = 600000){    HttpWebRequest request = WebRequest.CreateHttp(url);    request.ContentType = "application/json;charset=utf-8";        request.CachePolicy = new System.Net.Cache.RequestCachePolicy(System.Net.Cache.RequestCacheLevel.Default);    request.Method = "GET";    request.ContentLength = 0;    request.Timeout = timeout;    return request.GetResponse() as HttpWebResponse;}public class wxopenidjsonobject{    public string access_token { get; set; }    public int expires_in { get; set; }    public string refresh_token { get; set; }    public string openid { get; set; }    public string scope { get; set; }}

注意事项：
1. redirect_uri可以为任意的，不同于类似微盟、点点客之类的微信托管平台，自己host就可以

2. 设置微信公众平台里的开发者中心中网页服务之网页授权获取用户基本信息的授权回调页面域名，以免报错：redirect_uri 参数错误

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