二维码长链

解释

获取小程序二维码长链接，适用于需要的码数量较多的业务场景。通过该接口生成的二维码，永久有效，无数量限制。

接口说明

POST https://openapi.baidu.com/rest/2.0/smartapp/qrcode/getunlimited?access_token=ACCESS_TOKEN

参数说明

query 参数

post 参数

返回值说明

如果调用成功，直接返回图片二进制内容，如果请求失败，会返回 JSON 格式的数据。

正确情况下返回图像的字节流，响应 header 中包含

HTTP/1.1 200 OK
Content-Type: image/png

错误情况下返回

HTTP/1.1 200 OK
Content-Type : application/json

返回信息

错误码

Bug&Tip

• Tip：POST 只支持 form 表单提交。
• Tip：正确返回 Content-Type：image/png

请求示例

• PHP

<?php
class Common_Qrcode
{
    const URL_SEND_REG  = 'https://openapi.baidu.com/rest/2.0/smartapp/qrcode/getunlimited?';
    /**
     * @desc 获取 access_token
     * https://smartprogram.baidu.com/docs/develop/serverapi/power_exp/
     * @param $appkey
     * @param $appSecret
     * @return bool|string
     */
    public static function getAccessToken($appkey, $appSecret) {
        $url = 'https://openapi.baidu.com/oauth/2.0/token?';
        $courierConf = Bd_Conf::getAppConf("classes/courier");
        $param                 = array(
            "grant_type"    => 'client_credentials',
            "client_id"     => $appkey,
            "client_secret" => $appSecret,
            "scope"         => 'smartapp_snsapi_base',
        );
        $url .= http_build_query($param);
        $curl = curl_init((string)$url);
        curl_setopt($curl, CURLOPT_HEADER, false);
        // 信任任何证书
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); 
        curl_setopt($curl, CURLOPT_RETURNTRANSFER,true);
        $data = curl_exec($curl);
        curl_close($curl);
        $res = json_decode($data,1);
        if ($data === false || empty($res['access_token'])) {
            Bd_Log::warning("getToken fail! data[$data]");
            return false;
        }
        return $res['access_token'];
    }
    /**
     * @desc 获取二维码base64字节流
     * https://smartprogram.baidu.com/docs/develop/serverapi/get/
     * @param $path
     * @param $width
     * @return bool|string
     */
    public static function getQrCode($path, $width)
    {
        $accessToken = self::getAccessToken();
        if ($accessToken === false){
            return false;
        }
        $courierConf = Bd_Conf::getAppConf("classes/courier");
        $data = array(
            "path"        => $path,
            "width"       => $width,
            "expire"      => $expire,
        );
        $res = self::curlPost($data,$accessToken);
        return $res;
    }
    /**
     * curl POST请求工具类
     * @param array $postDataArr 传递的数组参数
     * @return string | array
     */
    public static function curlPost($postDataArr,$accessToken)
    {
        $headerArr = array(
            "Content-type:application/x-www-form-urlencoded"
        );
        $url = self::URL_SEND_REG;
        $param = array(
            'access_token'=>$accessToken,
        );
        $url .= http_build_query($param);
        $curl = curl_init((string)$url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $postDataArr);
        curl_setopt($curl, CURLOPT_HTTPHEADER, $headerArr);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($curl);
        $info = curl_getinfo($curl);
        curl_close($curl);
        $res = '';
        if ($info["content_type"] == "image/png") {
            $res = base64_encode($output);
        }
        return $res;
    }
}