微信小程序授权获取用户详细信息openid

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小程序获取用户的头像昵称openid之类

第一种使用wx.getUserInfo直接获取微信头像，昵称

wx<span class="hljs-preprocessor">.getUserInfo</span>({
     success: function (res) {
      that<span class="hljs-preprocessor">.setData</span>({
          nickName: res<span class="hljs-preprocessor">.userInfo</span><span class="hljs-preprocessor">.nickName</span>,
         avatarUrl: res<span class="hljs-preprocessor">.userInfo</span><span class="hljs-preprocessor">.avatarUrl</span>,
      })
      },
})

第二种
我们在使用小程序wx.login API进行登录的时候，直接使用wx.getUserInfo是不能获取更多的信息的，如微信用户的openid。
官方提示，需要发送获取到的code进行请求到微信的后端API，

根据文档，只需要进行一个get请求到如下地址即可：
<span class="hljs-label">https:</span>//api<span class="hljs-preprocessor">.weixin</span><span class="hljs-preprocessor">.qq</span><span class="hljs-preprocessor">.com</span>/sns/jscode2session?appid=APPID&amp;secret=SECRET&amp;
js_code=JSCODE&amp;grant_type=authorization_code

appid和secret在微信小程序后台可以看到，
js_code为使用wx<span class="hljs-preprocessor">.login</span>登录时获取到的code参数数据，
grant_type这个不用改动。

官方推荐

在login获取到code，然后发送到开发者后端，

后端再通过接口去微信后端换取到openid和sessionKey

（并且现在会将unionid也一并返回）之后，

然后把3rd_session返回给前端，

就已经完成登录行为。而login行为是静默，不必授权的，不会对用户造成骚扰。

getUserInfo只是为了提供更优质的服务而存在，

比如展示头像昵称，判断性别，

通过unionId和其他公众号上已有的用户画像结合起来提供历史数据。

所以不必在刚刚进入小程序的时候就强制要求授权。

js文件

 <span class="hljs-keyword">var</span> openId = (wx.getStorageSync(<span class="hljs-string">'openId'</span>))
        <span class="hljs-keyword">if</span> (openId) {
          wx.getUserInfo({
            success: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">(res)</span> {</span>
              that.setData({
                nickName: res.userInfo.nickName,
                avatarUrl: res.userInfo.avatarUrl,
              })
            },
            fail: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">()</span> {</span>
              <span class="hljs-comment">// fail</span>
              console.log(<span class="hljs-string">"获取失败！"</span>)
            },
            complete: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">()</span> {</span>
              <span class="hljs-comment">// complete</span>
              console.log(<span class="hljs-string">"获取用户信息完成！"</span>)
            }
          })
        } <span class="hljs-keyword">else</span> {
          wx.login({
            success: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">(res)</span> {</span>
              console.log(res.code)
              <span class="hljs-keyword">if</span> (res.code) {
                wx.getUserInfo({
                  withCredentials: <span class="hljs-keyword">true</span>,
                  success: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">(res_user)</span> {</span>
                    wx.request({
                     <span class="hljs-comment">//后台接口地址</span>
                      url: <span class="hljs-string">'https://....com/wx/login'</span>,
                      data: {
                        code: res.code,
                        encryptedData: res_user.encryptedData,
                        iv: res_user.iv
                      },
                      method: <span class="hljs-string">'GET'</span>,
                      header: {
                        <span class="hljs-string">'content-type'</span>: <span class="hljs-string">'application/json'</span>
                      },
                      success: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">(res)</span> {</span>
                        <span class="hljs-comment">// this.globalData.userInfo = JSON.parse(res.data);</span>
                        that.setData({
                          nickName: res.data.nickName,
                          avatarUrl: res.data.avatarUrl,
                        })
                        wx.setStorageSync(<span class="hljs-string">'openId'</span>, res.data.openId);

                      }
                    })
                  }, fail: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">()</span> {</span>
                    wx.showModal({
                      title: <span class="hljs-string">'警告通知'</span>,
                      content: <span class="hljs-string">'您点击了拒绝授权,将无法正常显示个人信息,点击确定重新获取授权。'</span>,
                      success: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">(res)</span> {</span>
                        <span class="hljs-keyword">if</span> (res.confirm) {
                          wx.openSetting({
                            success: (res) =&gt; {
                              <span class="hljs-keyword">if</span> (res.authSetting[<span class="hljs-string">"scope.userInfo"</span>]) {<span class="hljs-comment">////如果用户重新同意了授权登录</span>
                                wx.login({
                                  success: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">(res_login)</span> {</span>
                                    <span class="hljs-keyword">if</span> (res_login.code) {
                                      wx.getUserInfo({
                                        withCredentials: <span class="hljs-keyword">true</span>,
                                        success: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">(res_user)</span> {</span>
                                          wx.request({
                                           url: <span class="hljs-string">'https://....com/wx/login'</span>,
                                            data: {
                                              code: res_login.code,
                                              encryptedData: res_user.encryptedData,
                                              iv: res_user.iv
                                            },
                                            method: <span class="hljs-string">'GET'</span>,
                                            header: {
                                              <span class="hljs-string">'content-type'</span>: <span class="hljs-string">'application/json'</span>
                                            },
                                            success: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">(res)</span> {</span>
                                              that.setData({
                                                nickName: res.data.nickName,
                                                avatarUrl: res.data.avatarUrl,

                                              })
                                              wx.setStorageSync(<span class="hljs-string">'openId'</span>, res.data.openId);
                                            }
                                          })
                                        }
                                      })
                                    }
                                  }
                                });
                              }
                            }, fail: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">(res)</span> {</span>

                            }
                          })

                        }
                      }
                    })
                  }, complete: <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">(res)</span> {</span>


                  }
                })
              }
            }
          })

        }


  },
  globalData: {   
    userInfo: <span class="hljs-keyword">null</span>
  }

后台是php 框架是laravel5.4版本

官方文档：
<span class="hljs-label">https:</span>//mp<span class="hljs-preprocessor">.weixin</span><span class="hljs-preprocessor">.qq</span><span class="hljs-preprocessor">.com</span>/debug/wxadoc/dev/api/signature<span class="hljs-preprocessor">.html</span>

微信官方提供了多种编程语言的示例代码（点击下载）。每种语言类型的接口名字均一致。调用方式可以参照示例。

下载之后在php文件中引入：
<span class="php"><span class="hljs-preprocessor">&lt;?php</span>

<span class="hljs-keyword">namespace</span> <span class="hljs-title">App</span>\<span class="hljs-title">Http</span>\<span class="hljs-title">Controllers</span>\<span class="hljs-title">Admin</span>;

<span class="hljs-keyword">use</span> <span class="hljs-title">Illuminate</span>\<span class="hljs-title">Http</span>\<span class="hljs-title">Request</span>;
<span class="hljs-keyword">use</span> <span class="hljs-title">App</span>\<span class="hljs-title">Http</span>\<span class="hljs-title">Controllers</span>\<span class="hljs-title">Controller</span>;
<span class="hljs-keyword">use</span> <span class="hljs-title">App</span>\<span class="hljs-title">Models</span>\<span class="hljs-title">User</span>;
<span class="hljs-keyword">use</span> <span class="hljs-title">App</span>\<span class="hljs-title">Models</span>\<span class="hljs-title">Wechatuser</span>;
<span class="hljs-keyword">include_once</span>   app_path(<span class="hljs-string">'/Http/Controllers/Admin/PHP/wxBizDataCrypt.php'</span>);


  <span class="hljs-comment">// 获取微信用户信息</span>
   <span class="hljs-keyword">public</span> <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">getWxLogin</span><span class="hljs-params">(Request <span class="hljs-variable">$request</span>)</span>
   {</span>
      <span class="hljs-comment">// require_once ROOTPATH . "./PHP/wxBizDataCrypt.php";</span>

        <span class="hljs-variable">$code</span>   =   <span class="hljs-variable">$request</span>-&gt;get(<span class="hljs-string">'code'</span>);
        <span class="hljs-variable">$encryptedData</span>   =   <span class="hljs-variable">$request</span>-&gt;get(<span class="hljs-string">'encryptedData'</span>);
        <span class="hljs-variable">$iv</span>   =   <span class="hljs-variable">$request</span>-&gt;get(<span class="hljs-string">'iv'</span>);
        <span class="hljs-variable">$appid</span>  =  <span class="hljs-string">"***"</span> ;
        <span class="hljs-variable">$secret</span> =   <span class="hljs-string">"***"</span>;

        <span class="hljs-variable">$URL</span> = <span class="hljs-string">"https://api.weixin.qq.com/sns/jscode2session?appid=$appid&amp;secret=$secret&amp;js_code=$code&amp;grant_type=authorization_code"</span>;

        <span class="hljs-variable">$apiData</span>=file_get_contents(<span class="hljs-variable">$URL</span>);
        <span class="hljs-comment">// var_dump($code,'wwwwwwww',$apiData['errscode']);</span>
        <span class="hljs-comment">//     $ch = curl_init();</span>
        <span class="hljs-comment">// 　　curl_setopt($ch, CURLOPT_URL, $URL);</span>
        <span class="hljs-comment">// 　　curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);</span>
        <span class="hljs-comment">// 　　curl_setopt($ch, CURLOPT_HEADER, 0);</span>
        <span class="hljs-comment">// 　　$output = curl_exec($ch);</span>
        <span class="hljs-comment">// 　　curl_close($ch)</span>

        <span class="hljs-keyword">if</span>(!<span class="hljs-keyword">isset</span>(<span class="hljs-variable">$apiData</span>[<span class="hljs-string">'errcode'</span>])){
            <span class="hljs-variable">$sessionKey</span> = json_decode(<span class="hljs-variable">$apiData</span>)-&gt;session_key;
            <span class="hljs-variable">$userifo</span> = <span class="hljs-keyword">new</span> \WXBizDataCrypt(<span class="hljs-variable">$appid</span>, <span class="hljs-variable">$sessionKey</span>);

            <span class="hljs-variable">$errCode</span> = <span class="hljs-variable">$userifo</span>-&gt;decryptData(<span class="hljs-variable">$encryptedData</span>, <span class="hljs-variable">$iv</span>, <span class="hljs-variable">$data</span> );

            <span class="hljs-keyword">if</span> (<span class="hljs-variable">$errCode</span> == <span class="hljs-number">0</span>) {
                <span class="hljs-keyword">return</span> (<span class="hljs-variable">$data</span> . <span class="hljs-string">"\n"</span>);
            } <span class="hljs-keyword">else</span> {
                <span class="hljs-keyword">return</span> <span class="hljs-keyword">false</span>;
            }
        }
   }</span>

官方文档的登录流程图，整个登录流程基本如下图所示：

wx.getUserInfo 接口调整

<span class="hljs-label">https:</span>//developers<span class="hljs-preprocessor">.weixin</span><span class="hljs-preprocessor">.qq</span><span class="hljs-preprocessor">.com</span>/blogdetail?action=get_post_info&amp;lang=
zh_CN&amp;token=<span class="hljs-number">1731615444</span>&amp;docid=<span class="hljs-number">0000</span>a26e1aca6012e896a517556c01

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