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微信公众号-接口凭据

星哥玩云

发布于 2022-09-14 09:58:50

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代码可运行

文章被收录于专栏：开源部署开源部署

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代码可运行

access_token是公众号的全局唯一票据，公众号调用各接口时都需使用access_token。开发者需要进行妥善保存。access_token的存储至少要保留512个字符空间。access_token的有效期目前为2个小时，需定时刷新，重复获取将导致上次获取的access_token失效

原理：

对https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET发起GET请求

正确的返回值

{
    "access_token":"ACCESS_TOKEN",
    "expires_in":7200
}

错误的返回值

{
    "errcode":40013,
    "errmsg":"invalid appid"
}

DJango服务代码实现

myApp/accessToken.py

<span class="hljs-keyword">import</span> time
<span class="hljs-keyword">import</span> requests
<span class="hljs-keyword">import</span> json

<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">AccessToken</span>:</span>
    _access_token = {
        <span class="hljs-string">"token"</span>:<span class="hljs-string">""</span>,
        <span class="hljs-string">"updatatime"</span>:time.time()
    }
<span class="hljs-meta">    @classmethod</span>
    <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">updateAccessToken</span><span class="hljs-params">(cls, grant_type, appid, secret)</span>:</span>
        url = <span class="hljs-string">"https://api.weixin.qq.com/cgi-bin/token?grant_type=%s&amp;appid=%s&amp;secret=%s"</span>%(grant_type, appid, secret)
        res = requests.get(url)
        resDit = json.loads(res.content)
        <span class="hljs-keyword">if</span> resDit[<span class="hljs-string">"access_token"</span>]:
            cls._access_token[<span class="hljs-string">"token"</span>] = resDit[<span class="hljs-string">"access_token"</span>]
            cls._access_token[<span class="hljs-string">"updatatime"</span>] = time.time()

<span class="hljs-meta">    @classmethod</span>
    <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">getAccessToken</span><span class="hljs-params">(cls, grant_type, appid, secret)</span>:</span>
        <span class="hljs-keyword">if</span> <span class="hljs-keyword">not</span> cls._access_token[<span class="hljs-string">"token"</span>] <span class="hljs-keyword">or</span> (time.time() - cls._access_token[<span class="hljs-string">"updatatime"</span>]) &gt;= <span class="hljs-number">6500</span>:
            <span class="hljs-comment"># 更新token</span>
            cls.updateAccessToken(grant_type, appid, secret)
        <span class="hljs-keyword">return</span> cls._access_token[<span class="hljs-string">"token"</span>]

myApp/urls.py

<span class="hljs-keyword">from</span> django.urls <span class="hljs-keyword">import</span> path, re_path
<span class="hljs-keyword">from</span> myApp <span class="hljs-keyword">import</span> views

urlpatterns = [
    path(<span class="hljs-string">r'index/'</span>, views.index),
    path(<span class="hljs-string">r'weixin/'</span>, views.weixin),
    path(<span class="hljs-string">r'access/'</span>, views.access),
]

myApp/views.py

<span class="hljs-keyword">from</span> django.shortcuts <span class="hljs-keyword">import</span> render, HttpResponse
<span class="hljs-keyword">from</span> django.views.decorators.csrf <span class="hljs-keyword">import</span> csrf_exempt
<span class="hljs-keyword">import</span> hashlib
<span class="hljs-keyword">from</span> myApp.accessToken <span class="hljs-keyword">import</span> AccessToken

<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">index</span><span class="hljs-params">(request)</span>:</span>
    <span class="hljs-keyword">return</span> HttpResponse(<span class="hljs-string">"sunck is a good man"</span>)

<span class="hljs-meta">@csrf_exempt</span>
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">weixin</span><span class="hljs-params">(request)</span>:</span>
    <span class="hljs-keyword">pass</span>
            
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">access</span><span class="hljs-params">(request)</span>:</span>
    access_token = AccessToken.getAccessToken(<span class="hljs-string">"client_credential"</span>, <span class="hljs-string">"wxffde55b11cc79754"</span>, <span class="hljs-string">"84e86527f090d6238ea1c0b96f5fc753"</span>)
    <span class="hljs-keyword">return</span> HttpResponse(access_token)