django 调用微信接口（微信支付、微信用户信息）

import hashlibimport randomimport stringimport urllibimport xml.etree.ElementTree as etimport timeimport requestsheaders = {    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36',}class WeChatConfig(object):    appid = '微信appid'    AppSecret = '微信AppSecret'    mch_id = '微信商户id'    api_key = '微信支付密钥'def get_access_token():    """    jssdk 刷新accesstoken的方法    微信基础接口所需的 accesstoken    :param appid:    :param secret::    :return:    """    appid = WeChatConfig.appid    secret = WeChatConfig.AppSecret    url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=' + \        appid + '&secret=' + secret    html = requests.get(url, headers=headers).text    m = eval(html)    return mdef get_open_id_token(APPID, SECRET, CODE):    """    通过前端传的code 和 WeChatConfig中的基本信息 来获取用户的openid还有一个网页授权的accesstoken    """    url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid=' + APPID + \        '&secret=' + SECRET + '&code=' + CODE + '&grant_type=authorization_code'    html = requests.get(url, headers=headers)    html_response = html.json()    return html_responsedef get_user_info2(access_token, openid):    """    这个access_token是基础accessToken    通过 openid 和 基础接口的accesstoken 来获取用户信息 和下面的get_user_info不同的是 这个更加详细    :param access_token:    :param openid:    :return:    微信公众平台开发文档介绍：https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421140839    """    url = 'https://api.weixin.qq.com/cgi-bin/user/info?access_token={0}&openid={1}&lang=zh_CN'.format(access_token,                                                                                                      openid)    html = requests.get(url, headers=headers)    html.encoding = 'utf-8'    html_response = html.json()    return html_responsedef get_user_info(access_token, openid):    """    这个access_token是网页授权 获取用户信息    :param access_token:    :param openid:    :return:    微信公众平台开发文档介绍：https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421140842    """    url = 'https://api.weixin.qq.com/sns/userinfo?access_token=%s&openid=%s&lang=zh_CN' % (access_token, openid)    html = requests.get(url, headers=headers)    html.encoding = 'utf-8'    html_response = html.json()    return html_responsedef get_ticket(access_token):    """    :param access_token: 基础accesstoken    :return:    """    url = 'https://api.weixin.qq.com/cgi-bin/ticket/getticket?' \          'access_token=' + access_token + '&type=jsapi'    html = requests.get(url, headers=headers).text    m = eval(html)    return mdef get_sign(ticket, url):    """    前端调用jssdk所需要的签名    """    return_dict = {}    timestamp = int(time.time() * 1000)    noncestr = ''.join(random.sample(string.ascii_letters + string.digits, 8))    sign = 'jsapi_ticket=' + ticket + '&noncestr=' + noncestr + '&timestamp=' + str(        timestamp) + '&url=' + url    sha = hashlib.sha1(sign.encode('utf-8'))    encrypts = sha.hexdigest()    return_dict = {"timestamp": timestamp, "nonceStr": noncestr,                   "signature": encrypts, "appId": WeChatConfig.appid}    return return_dictdef get_Package(body,                notify_url,                openid,                spbill_create_ip,                total_fee,                out_trade_no,                ):                """                前端调起微信H5支付所需要的参数                这里获取的是 prepay_id                """    appid = WeChatConfig.appid    mch_id = WeChatConfig.mch_id    api_key = WeChatConfig.api_key    nonce_str = ''.join(random.sample(        string.ascii_letters + string.digits, 32))    # timeStamp = time.time()    # out_trade_no = "{0}{1}".format(WeChatConfig.appid, int(timeStamp * 100))    stringA = "appid=" + appid + \              "&body=" + body + \              "&mch_id=" + mch_id + \              "&nonce_str=" + nonce_str + \              "&notify_url=" + notify_url + \              "&openid=" + openid + \              "&out_trade_no=" + out_trade_no + \              "&spbill_create_ip=" + spbill_create_ip + \              "&total_fee=" + total_fee + \              "&trade_type=JSAPI"    stringSignTemp = stringA + "&key=" + api_key  # api-key未知    paySign = hashlib.md5(stringSignTemp.encode('utf-8')).hexdigest().upper()    # print('paySign=', paySign)    PayXml = "<xml>\                    <appid>" + appid + "</appid>\                    <body>" + body + "</body>\                    <mch_id>" + mch_id + "</mch_id>\                    <nonce_str>" + nonce_str + "</nonce_str>\                    <notify_url>" + notify_url + "</notify_url>\                    <openid>" + openid + "</openid>\                    <out_trade_no>" + out_trade_no + "</out_trade_no>\                    <spbill_create_ip>" + spbill_create_ip + "</spbill_create_ip>\                    <total_fee>" + total_fee + "</total_fee>\                    <trade_type>JSAPI</trade_type>\                    <sign>" + paySign + "</sign>\                    </xml>"    req = urllib.request.Request(        "https://api.mch.weixin.qq.com/pay/unifiedorder")    req.add_header('User-Agent',                   'Mozilla/6.0 (iPhone; CPU iPhone OS 8_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/8.0 Mobile/10A5376e Safari/8536.25')    unifiedorderXML = urllib.request.urlopen(req, data=PayXml.encode('utf-8'))    tree = et.parse(unifiedorderXML)    root = tree.getroot()    # psign = root.find('sign').text    prepay_id = root.find("prepay_id").text    package = "prepay_id=" + prepay_id    return packagedef get_PaySign(package):    """    将 要传给前端的数据全部打包发给前端    """    timestamp = int(time.time() * 1000)    noncestr = ''.join(random.sample(string.ascii_letters + string.digits, 8))    stringB = "appId=" + WeChatConfig.appid + "&nonceStr=" + noncestr + "&package=" + package + "&signType=MD5&timeStamp=" + str(        timestamp)    stringBSignTemp = stringB + "&key={0}".format(WeChatConfig.api_key)    paysign = hashlib.md5(stringBSignTemp.encode('utf-8')).hexdigest().upper()    # 生成微信支付签名    Payment = {}    Payment['timestamp'] = timestamp    Payment['noncestr'] = noncestr    Payment['paySign'] = paysign    Payment['package'] = package    return Payment

以上是调用微信接口相关
关于俩个accesstoken和俩个调用微信用户信息的接口大家可以看下这篇文章
微信获取用户信息的两个接口和两个ACCESS_TOKEN
关于微信支付 我也是通过前人的总结了解的 如下
python+h5微信支付总结

关于如何储存 基础accesstoken的方法
本人是通过数据库拉取有效期内的accesstoken
新建一张model

class AccessToken(models.Model):    # access_token  # 存放access_token    # expires  # 存放毫秒数    # update_time  # 更新时间戳    access_token = models.CharField(max_length=255, null=True, blank=True, verbose_name='基础accessToken')    expires = models.IntegerField(default=7200, verbose_name='可存放的时间')    update_time = models.IntegerField(null=True, blank=True, verbose_name='更新时间')    class Meta:        verbose_name = '微信accesstoken记录表'        verbose_name_plural = '微信accesstoken记录表'        db_table = 'WCaccesstoken'    def __str__(self):        return self.access_token

如何验证 accesstoken是否有效

import time def send_accesstoken():    try:        accesstoken = AccessToken.objects.get(id=1)        update_time = accesstoken.update_time        now_time = int(time.time())        if update_time < now_time:        # 验证是否过期            M_accesstoken = get_access_token()            access_token = M_accesstoken['access_token']            accesstoken.access_token = access_token            _updatetime = int(time.time()) + 7200            # 更新过期时间            accesstoken.update_time = _updatetime            accesstoken.save()            return access_token        else:            return accesstoken.access_token    except:        M_accesstoken = get_access_token()        access_token = M_accesstoken['access_token']        _accesstoken = AccessToken()        _accesstoken.access_token = access_token        _updatetime = int(time.time()) + 7200        _accesstoken.update_time = _updatetime        _accesstoken.save()        return access_token