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<small><time class="date dt-published" datetime="2021-04-09T00:00:00+08:00">9 April 2021</time> - 字数统计3260 - 阅读大约需要11分钟 - Hits: <span id="/2021/04/09/weauth.html" class="visitors">Loading...</span></small>
<h1 class="p-name">自制微信二维码登录API</h1>
<p class="view">by <a class="p-author h-card" href="//github.com/Mabbs">mayx</a></p>
<div id="outdate" style="display:none;">
<hr /><p>
这是一篇创建于 <span id="outime"></span> 天前的文章,其中的信息可能已经有所发展或是发生改变。
</p>
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daysold = Math.floor((new Date().getTime() - new Date("Fri, 09 Apr 2021 00:00:00 +0800").getTime()) / (24 * 60 * 60 * 1000));
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document.getElementById("outime").innerHTML = daysold;
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<hr />
<b>AI摘要</b>
<p id="ai-output">这篇文章主要介绍了制作微信二维码登录API的过程作者希望通过模块化的方式简化服务允许开发者通过扫描二维码获取用户的唯一标识OpenID。API涉及设置和获取OpenID的功能通过POST请求创建二维码以及验证用户的扫码事件以获取或验证OpenID。开发者需先存储OpenID使用随机的key命名且建议使用UUID。作者强调代码可能存在安全漏洞期待安全专家的意见进行改进。此外API还可以用于网站扫码绑定登录和推送消息。</p>
<hr />
<ul><li><a href="#起因">起因</a></li><li><a href="#代码">代码</a></li><li><a href="#使用文档">使用文档</a><ul><li><a href="#接口调用方法">接口调用方法</a></li><li><a href="#说明">说明</a></li><li><a href="#使用示例">使用示例</a></li><li><a href="#注意事项">注意事项</a></li></ul></li></ul>
<hr />
<main class="post-content e-content" role="main"><p>二维码登录看来也不是什么复杂的东西嘛<!--more--></p>
<h1 id="起因">
<a href="#起因"><svg class='octicon' viewBox='0 0 16 16' version='1.1' width='16' height='32' aria-hidden='true'><path fill-rule='evenodd' d='M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z'></path></svg></a> 起因
</h1>
<p>前段时间我用了一位大佬的认证公众号做了一个<a href="/2021/03/23/wxpush.html">微信推送</a>的API并且希望把它做成像WxPusher那样的平台。但是吧……我想了想现在微服务不是比较火嘛WxPusher那种的实在是太臃肿了而且还是用Java写的那就更加垃圾了所以我决定把功能模块化让每一个功能都可以单独运行互不影响。 </p><p>
而今天我要做的就是允许A用户开发者使用微信扫描二维码的方式去获取B用户客户的用户ID。当然这种功能的话肯定还是用PHP完成的啦所以代码如下</p>
<h1 id="代码">
<a href="#代码"><svg class='octicon' viewBox='0 0 16 16' version='1.1' width='16' height='32' aria-hidden='true'><path fill-rule='evenodd' d='M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z'></path></svg></a> 代码
</h1>
<div class="language-php highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="cp">&lt;?php</span>
<span class="nv">$appid</span><span class="o">=</span><span class="s1">'公众号APPID'</span><span class="p">;</span>
<span class="nv">$secret</span><span class="o">=</span><span class="s1">'公众号Secret'</span><span class="p">;</span>
<span class="nv">$token</span><span class="o">=</span><span class="s1">'和配置的Token配置一致即可'</span><span class="p">;</span>
<span class="nb">ini_set</span><span class="p">(</span><span class="s1">'session.gc_maxlifetime'</span><span class="p">,</span> <span class="mi">7200</span><span class="p">);</span>
<span class="nb">session_id</span><span class="p">(</span><span class="s1">'Storagepush'</span><span class="p">);</span>
<span class="nb">session_start</span><span class="p">();</span>
<span class="k">if</span><span class="p">(</span><span class="o">!</span><span class="nb">json_decode</span><span class="p">(</span><span class="nb">file_get_contents</span><span class="p">(</span><span class="s1">'https://api.weixin.qq.com/cgi-bin/get_api_domain_ip?access_token='</span><span class="mf">.</span><span class="nv">$_SESSION</span><span class="p">[</span><span class="s1">'access_token'</span><span class="p">]),</span><span class="kc">true</span><span class="p">)[</span><span class="s1">'ip_list'</span><span class="p">]){</span>
<span class="nv">$_SESSION</span><span class="p">[</span><span class="s1">'access_token'</span><span class="p">]</span><span class="o">=</span><span class="nb">json_decode</span><span class="p">(</span><span class="nb">file_get_contents</span><span class="p">(</span><span class="s1">'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&amp;appid='</span><span class="mf">.</span><span class="nv">$appid</span><span class="mf">.</span><span class="s1">'&amp;secret='</span><span class="mf">.</span><span class="nv">$secret</span><span class="p">),</span><span class="kc">true</span><span class="p">)[</span><span class="s1">'access_token'</span><span class="p">];</span>
<span class="p">}</span>
<span class="k">if</span><span class="p">(</span><span class="k">isset</span><span class="p">(</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"action"</span><span class="p">])</span><span class="o">&amp;&amp;</span><span class="k">isset</span><span class="p">(</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"key"</span><span class="p">])){</span>
<span class="nv">$_GET</span><span class="p">[</span><span class="s2">"key"</span><span class="p">]</span><span class="o">=</span><span class="nb">addslashes</span><span class="p">(</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"key"</span><span class="p">]);</span>
<span class="k">if</span><span class="p">(</span><span class="nb">strlen</span><span class="p">(</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"key"</span><span class="p">])</span><span class="o">&lt;</span><span class="mi">6</span><span class="o">||</span><span class="nb">strlen</span><span class="p">(</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"key"</span><span class="p">])</span><span class="o">&gt;</span><span class="mi">32</span><span class="p">){</span>
<span class="k">die</span><span class="p">(</span><span class="s2">"Bad Key"</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">if</span><span class="p">(</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"action"</span><span class="p">]</span> <span class="o">==</span> <span class="s2">"set"</span><span class="p">){</span>
<span class="k">echo</span> <span class="nb">file_get_contents</span><span class="p">(</span><span class="s1">'https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token='</span><span class="mf">.</span><span class="nv">$_SESSION</span><span class="p">[</span><span class="s1">'access_token'</span><span class="p">],</span> <span class="kc">false</span><span class="p">,</span> <span class="nb">stream_context_create</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="s1">'http'</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span><span class="s1">'method'</span><span class="o">=&gt;</span><span class="s1">'POST'</span><span class="p">,</span><span class="s1">'header'</span><span class="o">=&gt;</span><span class="s2">"Content-Type: application/json;charset=utf-8"</span><span class="p">,</span><span class="s1">'content'</span><span class="o">=&gt;</span><span class="s1">'{"expire_seconds": 3600, "action_name": "QR_STR_SCENE", "action_info": {"scene": {"scene_str": "auth'</span><span class="mf">.</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"key"</span><span class="p">]</span><span class="mf">.</span><span class="s1">'"}}}'</span><span class="p">))));</span>
<span class="p">}</span>
<span class="k">if</span> <span class="p">(</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"action"</span><span class="p">]</span> <span class="o">==</span> <span class="s2">"get"</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span><span class="p">(</span><span class="k">isset</span><span class="p">(</span><span class="nv">$_SESSION</span><span class="p">[</span><span class="s1">'wxboxauth'</span><span class="mf">.</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"key"</span><span class="p">]])){</span>
<span class="k">echo</span> <span class="nv">$_SESSION</span><span class="p">[</span><span class="s1">'wxboxauth'</span><span class="mf">.</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"key"</span><span class="p">]];</span>
<span class="p">}</span><span class="k">else</span><span class="p">{</span>
<span class="k">echo</span> <span class="s2">"Empty"</span><span class="p">;</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="p">}</span><span class="k">else</span><span class="p">{</span>
<span class="nv">$timestamp</span><span class="o">=</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"timestamp"</span><span class="p">];</span>
<span class="nv">$nonce</span><span class="o">=</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"nonce"</span><span class="p">];</span>
<span class="nv">$tmpArr</span><span class="o">=</span><span class="k">array</span><span class="p">(</span><span class="nv">$token</span><span class="p">,</span> <span class="nv">$timestamp</span><span class="p">,</span> <span class="nv">$nonce</span><span class="p">);</span>
<span class="nb">sort</span><span class="p">(</span><span class="nv">$tmpArr</span><span class="p">,</span> <span class="no">SORT_STRING</span><span class="p">);</span>
<span class="k">if</span><span class="p">(</span> <span class="nb">sha1</span><span class="p">(</span><span class="nb">implode</span><span class="p">(</span><span class="nv">$tmpArr</span><span class="p">))</span> <span class="o">==</span> <span class="nv">$_GET</span><span class="p">[</span><span class="s2">"signature"</span><span class="p">]</span> <span class="p">){</span>
<span class="k">if</span><span class="p">(</span><span class="nv">$_GET</span><span class="p">[</span><span class="s2">"echostr"</span><span class="p">]){</span>
<span class="k">echo</span> <span class="nv">$_GET</span><span class="p">[</span><span class="s2">"echostr"</span><span class="p">];</span>
<span class="p">}</span><span class="k">else</span><span class="p">{</span>
<span class="c1">// 加载XML内容</span>
<span class="nv">$content</span> <span class="o">=</span> <span class="nb">file_get_contents</span><span class="p">(</span><span class="s2">"php://input"</span><span class="p">);</span>
<span class="nv">$p</span> <span class="o">=</span> <span class="nb">xml_parser_create</span><span class="p">();</span>
<span class="nb">xml_parse_into_struct</span><span class="p">(</span><span class="nv">$p</span><span class="p">,</span> <span class="nv">$content</span><span class="p">,</span> <span class="nv">$vals</span><span class="p">,</span> <span class="nv">$index</span><span class="p">);</span>
<span class="nb">xml_parser_free</span><span class="p">(</span><span class="nv">$p</span><span class="p">);</span>
<span class="k">if</span><span class="p">((</span><span class="nv">$vals</span><span class="p">[</span><span class="nv">$index</span><span class="p">[</span><span class="s1">'EVENT'</span><span class="p">][</span><span class="mi">0</span><span class="p">]][</span><span class="s1">'value'</span><span class="p">]</span> <span class="o">==</span> <span class="s2">"subscribe"</span> <span class="o">||</span> <span class="nv">$vals</span><span class="p">[</span><span class="nv">$index</span><span class="p">[</span><span class="s1">'EVENT'</span><span class="p">][</span><span class="mi">0</span><span class="p">]][</span><span class="s1">'value'</span><span class="p">]</span> <span class="o">==</span> <span class="s2">"SCAN"</span><span class="p">)</span> <span class="o">&amp;&amp;</span> <span class="k">isset</span><span class="p">(</span><span class="nv">$vals</span><span class="p">[</span><span class="nv">$index</span><span class="p">[</span><span class="s1">'EVENTKEY'</span><span class="p">][</span><span class="mi">0</span><span class="p">]][</span><span class="s1">'value'</span><span class="p">])){</span>
<span class="k">if</span><span class="p">(</span><span class="nv">$vals</span><span class="p">[</span><span class="nv">$index</span><span class="p">[</span><span class="s1">'EVENT'</span><span class="p">][</span><span class="mi">0</span><span class="p">]][</span><span class="s1">'value'</span><span class="p">]</span> <span class="o">==</span> <span class="s2">"subscribe"</span><span class="p">){</span>
<span class="nv">$vals</span><span class="p">[</span><span class="nv">$index</span><span class="p">[</span><span class="s1">'EVENTKEY'</span><span class="p">][</span><span class="mi">0</span><span class="p">]][</span><span class="s1">'value'</span><span class="p">]</span> <span class="o">=</span> <span class="nb">substr</span><span class="p">(</span><span class="nv">$vals</span><span class="p">[</span><span class="nv">$index</span><span class="p">[</span><span class="s1">'EVENTKEY'</span><span class="p">][</span><span class="mi">0</span><span class="p">]][</span><span class="s1">'value'</span><span class="p">],</span><span class="mi">8</span><span class="p">);</span>
<span class="p">}</span>
<span class="nv">$_SESSION</span><span class="p">[</span><span class="s1">'wxbox'</span><span class="mf">.</span><span class="nv">$vals</span><span class="p">[</span><span class="nv">$index</span><span class="p">[</span><span class="s1">'EVENTKEY'</span><span class="p">][</span><span class="mi">0</span><span class="p">]][</span><span class="s1">'value'</span><span class="p">]]</span> <span class="o">=</span> <span class="nv">$vals</span><span class="p">[</span><span class="nv">$index</span><span class="p">[</span><span class="s1">'FROMUSERNAME'</span><span class="p">][</span><span class="mi">0</span><span class="p">]][</span><span class="s1">'value'</span><span class="p">];</span>
<span class="k">echo</span> <span class="s1">'&lt;xml&gt;
&lt;ToUserName&gt;&lt;![CDATA['</span><span class="mf">.</span><span class="nv">$vals</span><span class="p">[</span><span class="nv">$index</span><span class="p">[</span><span class="s1">'FROMUSERNAME'</span><span class="p">][</span><span class="mi">0</span><span class="p">]][</span><span class="s1">'value'</span><span class="p">]</span><span class="mf">.</span><span class="s1">']]&gt;&lt;/ToUserName&gt;
&lt;FromUserName&gt;&lt;![CDATA['</span><span class="mf">.</span><span class="nv">$vals</span><span class="p">[</span><span class="nv">$index</span><span class="p">[</span><span class="s1">'TOUSERNAME'</span><span class="p">][</span><span class="mi">0</span><span class="p">]][</span><span class="s1">'value'</span><span class="p">]</span><span class="mf">.</span><span class="s1">']]&gt;&lt;/FromUserName&gt;
&lt;CreateTime&gt;'</span><span class="mf">.</span><span class="nb">time</span><span class="p">()</span><span class="mf">.</span><span class="s1">'&lt;/CreateTime&gt;
&lt;MsgType&gt;&lt;![CDATA[text]]&gt;&lt;/MsgType&gt;
&lt;Content&gt;&lt;![CDATA[成功请求登录!]]&gt;&lt;/Content&gt;
&lt;/xml&gt;'</span><span class="p">;</span>
<span class="p">}</span><span class="k">else</span><span class="p">{</span>
<span class="k">echo</span> <span class="s2">"success"</span><span class="p">;</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="p">}</span><span class="k">else</span><span class="p">{</span>
<span class="k">echo</span> <span class="s2">"Fail"</span><span class="p">;</span>
<span class="p">}</span>
<span class="p">}</span>
</code></pre></div></div>
<h1 id="使用文档">
<a href="#使用文档"><svg class='octicon' viewBox='0 0 16 16' version='1.1' width='16' height='32' aria-hidden='true'><path fill-rule='evenodd' d='M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z'></path></svg></a> 使用文档
</h1>
<h2 id="接口调用方法">
<a href="#接口调用方法"><svg class='octicon' viewBox='0 0 16 16' version='1.1' width='16' height='32' aria-hidden='true'><path fill-rule='evenodd' d='M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z'></path></svg></a> 接口调用方法
</h2>
<table>
<thead>
<tr>
<th>参数</th>
<th>是否必填</th>
<th>请求方法</th>
<th>内容</th>
</tr>
</thead>
<tbody>
<tr>
<td>action</td>
<td></td>
<td>GET</td>
<td>set/get</td>
</tr>
<tr>
<td>key</td>
<td></td>
<td>GET</td>
<td>6-32字节长度的随机字符串</td>
</tr>
</tbody>
</table>
<h2 id="说明">
<a href="#说明"><svg class='octicon' viewBox='0 0 16 16' version='1.1' width='16' height='32' aria-hidden='true'><path fill-rule='evenodd' d='M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z'></path></svg></a> 说明
</h2>
<p>开发者需要先使用set方法设置一个存储用户OPENID的盒子使用key来命名为了避免重复这里推荐使用32位的UUID作为名称请求完成之后会获得一个有效时长为1小时的二维码的ticket和二维码的地址可以如果希望自己生成二维码可以使用返回的URL作为二维码的内容或者也可以调用微信的Ticket转二维码接口<code class="language-plaintext highlighter-rouge">https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=</code>后面加上获得的Ticket就可以直接获得二维码的图片。 </p><p>
获取OPENID需要使用get方法去获得命名为key的盒子如果用户已经扫描了二维码那么调用此接口会直接返回扫描者的OPENID如果没有扫描或者用户扫描后超过了2个小时就会返回Empty以表示盒子为空。</p>
<h2 id="使用示例">
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</h2>
<p>像我之前写的<a href="/2021/03/23/wxpush.html">微信推送</a>中不是就需要这个用户的OPENID嘛假如一个网站想要主动给某些用户推送消息就可以先调用这个接口获得用户的OPENID然后存起来有必要时可以直接使用微信推送来给用户推送信息。另外这个OPENID是唯一的所以假如想做网站二维码扫描绑定登录同样也可以使用这个接口。具体实现就非常简单了所以示例代码我就不写了。</p>
<h2 id="注意事项">
<a href="#注意事项"><svg class='octicon' viewBox='0 0 16 16' version='1.1' width='16' height='32' aria-hidden='true'><path fill-rule='evenodd' d='M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z'></path></svg></a> 注意事项
</h2>
<p>像这个代码依然不防滥用,并且我也没有检验过安全性,是有很大可能有漏洞的。所以有懂安全的大佬也可以指点一下,来完善这个项目。</p></main>
<small style="display: block">tags: <a rel="category tag" class="p-category" href="/search.html?keyword=%E5%BE%AE%E4%BF%A1"><em>微信</em></a> - <a rel="category tag" class="p-category" href="/search.html?keyword=%E7%99%BB%E5%BD%95"><em>登录</em></a> - <a rel="category tag" class="p-category" href="/search.html?keyword=%E9%AA%8C%E8%AF%81"><em>验证</em></a> - <a rel="category tag" class="p-category" href="/search.html?keyword=PHP"><em>PHP</em></a> <span style="float: right;"><a href="https://gitlab.com/mayx/mayx.gitlab.io/tree/master/_posts/2021-04-09-weauth.md">查看原始文件</a></span></small>
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