TP框架-上传apk包文件

TP中的写法，增加了根据文件mime类型二次校验上传文件的类型。

/**
 * @ApiTitle    (上传apk文件)
 * @ApiSummary  (在线升级)
 * @ApiMethod   (POST)
 * @ApiParams   (name="apk", type="file", required=true, description="apk包")
 * 
 * @ApiReturnParams   (name="version_code", type="string", required=false, description="版本号")
 * @ApiReturnParams   (name="device_type", type="string", required=false, description="设备类型")
 * @ApiReturnParams   (name="device_model", type="string", required=false, description="设备型号")
 * @ApiReturnParams   (name="url", type="string", required=false, description="路径地址")
 */
public function upload_apk()
{
    $file_name = key($_FILES);
    $file = request()->file($file_name);
    if (!$file) {
        return $this->error("文件上传失败");
    }

    if (!$file->checkExt('apk')) {
        return $this->error("不允许上传此类型文件！");
    }

    $path = ROOT_PATH . 'public' . DS . 'upload' . DS . 'apk';
    $name = iconv('utf-8', 'gbk', $file->getInfo()['name']);

    // 包名格式： 设备型号_版本号.apk
    list($device_model, $version_code) = explode('_', $name);
    if (empty($device_model) || empty($version_code)) {
        return $this->error("文件上传失败，版本号解析异常！");
    }
    $service = new LibraryUpgrade();
    $device_version = $service->get_newest_version($device_model);

    $info = $file->move($path, $name);
    if (!$info) {
        return $this->error("上传失败");
    }
    $tmp_path = DS . 'upload' . DS . 'apk' . DS . $name;

    $save_path = str_replace(DS, "/", $tmp_path);
    
    // 根据文件的mime类型二次校验
    $finfo = finfo_open(FILEINFO_MIME_TYPE);
    $mime = finfo_file($finfo, '.'.$save_path); 
    finfo_close($finfo);
    if ($mime != 'application/java-archive') {
        unlink($path . "/" . $name);
        return $this->error("上传失败，文件类型异常！");
    }

    $return = [
        'url' => $save_path,
        'version_code' => substr($version_code, 0, -4),
        'device_type' => $device_version['device_type'] ?? '',
        'device_model' => $device_model
    ];

    return $this->success("成功", $return);
}