Question

使用回调作为参数时遇到了麻烦。

这是来源。

authRequiredCall(socket1, 'media_file_add', function(userInfo, message) {
            saveMediaFile(message.project_id, message.path, function(err, result) {
                    console.log('send media_file_add response: ' + JSON.stringify(result))
                    socket1.emit('media_added', result);
            });
    });


function saveMediaFile(project_id, file_path, callback) {
        download(file_path, './uploads/')
            .on('close', function () {
                console.log('One file has been downloaded.');
                var filename = path.basename(file_path);

                putMediaToS3bucketAndSaveToDB(project_id, filename, callack);
            });
}


function putMediaToS3bucketAndSaveToDB(project_id, filename, callack) {

    ... 

    uploader.on('end', function() {
        var uploadedPath = s3.getPublicUrl(config.s3_config.BUCKET_NAME, newFilename, "");
        console.log("FILE UPLOADED", uploadedPath);
        fs.unlink("uploads/"+filename);
        uploadedPath = uploadedPath.replace('s3', 's3-us-west-2');
        console.log("PATH", uploadedPath);
        //Saving the file in the database
        addMediaFile(project_id, uploadedPath, callback);
    });
}


function putMediaToS3bucketAndSaveToDB(project_id, filename, callack) {

    ... 

    uploader.on('end', function() {
        var uploadedPath = s3.getPublicUrl(config.s3_config.BUCKET_NAME, newFilename, "");
        console.log("FILE UPLOADED", uploadedPath);
        fs.unlink("uploads/"+filename);
        uploadedPath = uploadedPath.replace('s3', 's3-us-west-2');
        console.log("PATH", uploadedPath);
        //Saving the file in the database
        addMediaFile(project_id, uploadedPath, callback);
    });
}

正如您所看到的，我正在尝试将回调作为参数发送到SaveMediaFile，但是当我使用回调参数调用putMediaToS3buketAndSaveToDB函数时，它会返回错误消息。

ReferenceError：未定义callack

我不知道为什么在project_id和file_path有值的情况下没有定义回调。

有没有人教我原因？

帮助我!!!

Answer 1

因为你有拼写错误

function putMediaToS3bucketAndSaveToDB(project_id, filename, callack) 
                                                                 ^

ReferenceError：在Node.js中未定义callack

1 个答案: