用户的授权获取用户的公众号信息。
appid | 公众号的唯一标识 |
redirect_uri | 访问接口获得code后回跳到自己项目的页面地址 |
response_type | 固定值code |
scope | 应用授权作用域： snsapi_base （不弹出授权页面，直接跳转，只能获取用户openid）。 snsapi_userinfo （弹出授权页面，可通过openid拿到昵称、性别、所在地。并且， 即使在未关注的情况下，只要用户授权，也能获取其信息 ） |
state | 重定向后会带上state参数，开发者可以填写a-zA-Z0-9的参数值，最多128字节。 注：此参数是公众号为开发者预留的一个参数，供开发者自行使用。 |
#wechat_redirect | 此参数为特定值，微信公众号官方需要的参数 |
如果接口参数scope的值为：snsapi_userinfo，会弹出授权页面，同意授权后，将跳转至：redirect_uri/?code=CODE&state=STATE。
如果接口参数scope的值为：snsapi_base ，页面将跳转至 redirect_uri/?code=CODE&state=STATE。CODE值是接口返回值，STATE是用户在接口自定义的值。在我的项目里redirect_uri的地址指向的首页，然后通过页面加载函数访问了WCF接口，将code和state传入WCF接口，通过下面的步骤判断是否实名认证。
第二步：通过code换取网页授权access_token和openid
此openid不是最终需要的openid，用户访问公众号页面，会产生一个用户和公众号唯一的openid。
appid | 公众号的唯一标识 |
appsecret | 公众号的appsecret |
code | 填写第一步获取的code参数 |
grant_type | 固定值authorization_code |
第三步：拉取用户信息（需scope为snsapi_userinfo）
access_token | 网页授权接口调用凭证，上一步获取的access_token |
openid | 用户的唯一标识：上一步获取的openid |
lang | zh_CN 简体，zh_TW 繁体，en 英 |
获取到用户基本信息，包括openid、昵称。性别。省份。城市、国家、头像等。
下面粘贴项目中用到的代码：
export default {
name: "empety",
mounted() {
this.GetCode();
},
methods: {
GetCode(){
var appid="wxc673835c46bca3dd";
var redirect_uri=encodeURIComponent("https://123.com.cn/#/index");
var https="https://open.weixin.qq.com/connect/oauth2/authorize?appid="+appid;
https+="&redirect_uri="+redirect_uri+"&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect"
window.location.href=https;
}
}
};我的项目前端使用VUE搭建的。GetCode是页面加载调用的方法，通过调用微信公众号接口获得code，然后重定向的页面：https://123.com.cn/#/index？code=CODE&state=1
GetAuthorizeCode() {
var code = this.GetQueryString1("code");
var state = this.GetQueryString1("state").split("#")[0];
GetAuthorizeCode(
"call_GetAuthorizeCode/" + code + "/" + state,
"call_GetAuthorizeCode"
)
.then((response) => {
var data = response.data;
if (data.tb != null) {
var row = data.tb[0];
console.log(data);
this.$store.state.system.certificate = true;
this.$store.state.system.openid = row["openid"];
this.$store.state.system.cardno = row["cardno"];
this.$store.state.system.patientid = row["patientid"];
this.$store.state.system.patientname = row["patientname"];
this.$store.state.system.hospitalid = row["hospitalid"];
this.$store.state.system.hospitalname = row["hospitalname"];
this.$store.state.system.serveraddress = row["serveraddress"];
this.$store.state.system.servertype = row["hospitalid"];
} else {
if (isNaN(data.code) && typeof data.code !== "number") {
this.$store.state.system.openid = data.code;
this.$message.warning("欢迎你，请实名认证");
}
console.log(data.code);
}
})
.catch(function (error) {
console.log(error);
});
},
GetQueryString1(name) {
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
var r = window.location.href.split("?")[1].match(reg);
if (r != null) return unescape(r[2]);
return null;
},进入index页面，执行方法GetAuthorizeCode()调用后台WCF接口GetAuthorizeCode。
/// <summary>
/// 获得认证信息
/// </summary>
/// <param name="callBackName"></param>
/// <returns></returns>
public Stream GetAuthorizeCode(string callBackName, string code, string state)
{
string appid = System.Configuration.ConfigurationManager.AppSettings.Get("appid");
string secret = System.Configuration.ConfigurationManager.AppSettings.Get("secret");
int result;
string tokens = GetAccessToken(appid, secret, code);
if (int.TryParse(tokens, out result)) return ObjectToJson(GetResultCer(result, null), callBackName);
string access_token = tokens.Split(';')[0];
string openid = tokens.Split(';')[1];
string _openid = GetUserInfo(access_token, openid);
if (int.TryParse(_openid, out result)) return ObjectToJson(GetResultCer(result, null), callBackName);
//string auth = Auth(access_token, _openid);
var tb = HemodialysisDB.DAL.CERTIFICATION.GetModelByOpenId(_openid);
if (tb != null && tb.Rows.Count > 0)
return ObjectToJson(GetResultCer(_openid, null), callBackName);
}
/// <summary>
/// 获得token信息
/// </summary>
/// <param name="appid"></param>
/// <param name="secret"></param>
/// <param name="code"></param>
/// <returns></returns>
private string GetAccessToken(string appid, string secret, string code)
{
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);
string gettstr = getstr(url);
JObject obj = (JObject)JsonConvert.DeserializeObject(gettstr);
JToken err;
if (!obj.TryGetValue("errcode", out err))
{
string access_token = obj.Value<string>("access_token");
string openid = obj.Value<string>("openid");
return access_token + ";" + openid;
}
else
{
return obj.Value<string>("errcode");
}
}
/// <summary>
/// 获得用户信息
/// </summary>
/// <param name="access_token"></param>
/// <param name="openid"></param>
/// <returns></returns>
private string GetUserInfo(string access_token, string openid)
{
string url = string.Format("https://api.weixin.qq.com/sns/userinfo?access_token={0}&openid={1}&lang=zh_CN", access_token, openid);
string gettstr = getstr(url);
JObject obj = (JObject)JsonConvert.DeserializeObject(gettstr);
JToken err;
if (!obj.TryGetValue("errcode", out err))
{
string _openid = obj.Value<string>("openid");
return _openid;
}
else
{
return obj.Value<string>("errcode");
}
}
/// <summary>
/// 验证openid
/// </summary>
/// <param name="access_token"></param>
/// <param name="openid"></param>
/// <returns></returns>
private string Auth(string access_token, string openid)
{
string url = string.Format("https://api.weixin.qq.com/sns/auth?access_token={0}&openid={1}", access_token, openid);
string gettstr = getstr(url);
JObject obj = (JObject)JsonConvert.DeserializeObject(gettstr);
string errcode = obj.Value<string>("errcode");
return errcode;
}
private string getstr(string url)
{
var request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";
request.ContentType = "application/json;charset=UTF-8";
var response = (HttpWebResponse)request.GetResponse();
var responseString = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("utf-8")).ReadToEnd();
return responseString;
}
private string poststr(string url, string jsonData)
{
var request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "POST";
request.ContentType = "application/json;charset=UTF-8";
byte[] byteData = Encoding.UTF8.GetBytes(jsonData);
int length = byteData.Length;
request.ContentLength = length;
Stream writer = request.GetRequestStream();
writer.Write(byteData, 0, length);
writer.Close();
var response = (HttpWebResponse)request.GetResponse();
var responseString = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("utf-8")).ReadToEnd();
return responseString;
}
private ResultCer GetResultCer(Object code, DataTable tb)
{
return new ResultCer { code = code.ToString(), tb = tb };
}
private Stream ObjectToJson(object detailList, string callbackName)
{
string str = JsonConvert.SerializeObject(detailList);
str = "" + callbackName + "(" + str + ")";
return new MemoryStream(Encoding.UTF8.GetBytes(str));
}
private string GetObj(Stream content, string key)
{
StreamReader sr = new StreamReader(content);
string str = sr.ReadToEnd();
sr.Dispose();
NameValueCollection collections = HttpUtility.ParseQueryString(str);
string value = collections[key];
string data = HttpUtility.UrlDecode(value, System.Text.Encoding.UTF8);
return data;
}
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