节点js将本地存储映像保存到服务器

我在Node中创建了一个函数来将我的本地存储映像保存到我服务器上的本地文件中，它似乎在我的本地工作正常，但现在我已经上传到服务器，我似乎一直在收到错误 .

在我的控制台中，我得到了一些我已经添加的控制台日志来帮助我调试，到目前为止我的控制台读取

请求测试1功能启动测试1功能结束保存照片功能base64启动保存照片功能启动if else错误保存照片

无论我改变什么，我都会得到 error saving photo

任何人都可以在我的代码中看到为什么我一直收到此错误？任何帮助非常感谢我已经在这个错误几个小时了 .

Full code

app.post('/mm3/back-end/savePhoto', function (req, res) {
    console.log('test 1 function started');
    var folder = Math.random().toString(36).substr(2, 20);
    var photos = req.body;
    var counts = 0;
    console.log('test 1 function ended');

    var callback = function(counts){
        console.log('start if else');
        if(counts < photos.length){
            saveBase64(photos[counts],folder,counts,callback);
            console.log('test if line');
        }else{
            var counts = 0;
            var response = {"folder":folder, "photos": photos.length};
            console.log('test else line');
            res.send(response)
        }
        console.log('end of function');
    };
    saveBase64(photos[counts],folder,counts,callback);
});

app.post('/mm3/downloadZip', function(req, res){
    console.log('test zip file started');
    var photos = req.body;
    var out =  photos[0];
    var test = out.split('/');
    var loc  = test.pop();
    var end =  test.join('/');
    console.log('test 3 function Generate zip file');
    console.log(end);
    var outName = '/' + end +'/mm3/MockUp.zip';
    var output = fs.createWriteStream(outName);
    var archive = archiver('zip', {store: true });
    var zip = function(photos, f){
        for(var t = 0; t < photos.length; t++){
            var file = 'mockUp'+ t +'.jpg';
            var from = '/var/www/html' +  photos[t];
            archive.file( from, { name: file });
        }
        f();
    };

    output.on('close', function() {
        var photos = req.body;
        var out =  photos[0];
        var test = out.split('/');
        var loc  = test.pop();
        var end =  test.join('/');
        res.send(end + '/MockUp.zip');
        console.log('archiver has been finalized and the output file descriptor has closed.');
    });
    archive.on('error', function(err) {
        throw err;
    });

    archive.pipe(output);
    zip(photos, f);
    function f(){
        archive.finalize();
    }
});

function saveBase64(photo,folder, counts, callback){
    console.log('save photo function base64 start');
    var result = photo.split(',')[1];
    var path = '/mm3/tmp/' + folder;
    var filename = path + "/out"+ counts + ".png";
    mkdirp( path, function() {

        fs.writeFile(filename, result, 'base64', function(error){
            console.log('save photo function start if else');
            if (error) {
                console.log('error saving photo');
            }else{
                console.log('photo saved');
                counts ++;
                callback(counts);
            }
        });
    });
}

更新：

我现在正在

错误：在getStaw（/ var / www / html / mm3 / node_modules / raw-body）的readStream（/var/www/html/mm3/node_modules/raw-body/index.js:196:17）请求实体太大/index.js:106:12）在Layer.jsonParser上读取（/var/www/html/mm3/node_modules/body-parser/lib/read.js:76:3）[作为句柄]（/ var / www） /html/mm3/node_modules/body-parser/lib/types/json.js:127:5）在trim_prefix（/var/www/html/mm3/node_modules/express/lib/router/index.js:226:17 ）在/var/www/html/mm3/node_modules/express/lib/router/index.js:198:9在Function.proto.process_params（/ var / www / html / mm3 / node_modules / express / lib / router /） index.js：251：12）在下一个（/var/www/html/mm3/node_modules/express/lib/router/index.js:189:19）在Layer.expressInit [作为句柄]（/ var / www / html / mm3 / node_modules / express / lib / middleware / init.js：23：5）在trim_prefix（/var/www/html/mm3/node_modules/express/lib/router/index.js:226:17）at /函数.proto.process_params上的var / www / html / mm3 / node_modules / express / lib / router / index.js：198：9（/ var / www / html / mm3 / node_modules / expre ss / lib / router / index.js：251：12）在Layer.query的下一个（/var/www/html/mm3/node_modules/express/lib/router/index.js:189:19）[作为句柄] （/var/www/html/mm3/node_modules/express/lib/middleware/query.js:37:5）在trim_prefix（/var/www/html/mm3/node_modules/express/lib/router/index.js： 226：17）在/var/www/html/mm3/node_modules/express/lib/router/index.js:198:9在Function.proto.process_params（/ var / www / html / mm3 / node_modules / express / lib） /router/index.js:251:12）下一步（/var/www/html/mm3/node_modules/express/lib/router/index.js:189:19）在Function.proto.handle（/ var / www） /html/mm3/node_modules/express/lib/router/index.js:234:5）在Function.app.handle上（/var/www/html/mm3/node_modules/express/lib/application.js:119:16 ）在Servers.app（/var/www/html/mm3/node_modules/express/lib/express.js:28:9）在emitTwo（events.js：87：13）