调用API函数“ files / get_thumbnail”时出错：HTTP标头“ Dropbox-API-Arg”：无法将输入解码为JSON

Question

调用API函数“ files / get_thumbnail”时出错：HTTP标头“ Dropbox-API-Arg”：无法将输入解码为JSON

从保管箱获取图像，现在，如果我想使用get_thumbnail从保管箱获取原始路径，那么我收到以下错误消息：API函数“ files / get_thumbnail”的调用错误：HTTP标头“ Dropbox-API-Arg”：可以不能将输入解码为JSON

这是代码

var folders = [];
var files_array = [];
var file_flag = 0;
var folder_flag = 0;
axios({
        method: 'POST',
        url: 'https://api.dropboxapi.com/2/files/list_folder',
        headers: {
            Authorization: 'Beareraccess_token',
            'Content-Type': 'application/json'
        },
        data: {
            path: "",
            include_media_info: true
        }
    })
    .then(function(response) {
            console.log(response);
            for (var i = 0; i < response.data.entries.length; i++) {
                if (response.data.entries[i][".tag"] == "folder") {
                    folders.push(response.data.entries[i].name);
                    folder_flag = 1;
                } else if (response.data.entries[i][".tag"] == "file") {
                    axios({
                            method: 'POST',
                            url: 'https://content.dropboxapi.com/2/files/get_thumbnail',
                            headers: {
                                Authorization: 'Bearer access_token',
                                'Content-Type': 'application/json',
                                'Dropbox-API-Arg': response.data.entries[i].id
                            }
                        })
                        .then(function(response) {
                            console.log(response);
                            file_flag = 1;
                        });
                } else {
                    console.log('No File or Folder availabel right now');
                }