从Node.js中的多部分请求检索JSON对象

Question

var form = new formidable.IncomingForm();
form.parse(req, function(err, fields, files) {
    if (err) {
        res.status(200).send('parsing error');
    }
});

var jsonObject;
var imageArray = [];

form.on('file', function(field, file) {
    console.log(file);
    if (file.type == 'application/json') {
        jsonObject = JSON.parse(fs.readFileSync(file.path, 'utf8'));
    } else if (file.type == 'image/jpeg') {
        imageArray.push(file.path);
    }
})

I'm using formidable to handle a multipart request in node.js made from my iOS app, the request usually contains "n" number of images and a associated JSON object, the formidable middleware treats the JSON as an file and stores the file in the temporary download location and provides a path to the file, the code "jsonObject = JSON.parse(fs.readFileSync(file.path, 'utf8'));" reads the file and parses into a JSON object. Is this how it is supposed to work or is there a better way, that negates the superfluous file write and read from the disk and provides a parsed JSON obj directly.

PS - newbie to node.js, heck newbie to entire backend system with a very bad case OCD.

Answer 1

如果在Content-Disposition标头值中设置了文件filename （或者如果Content-Type为application/octet-stream则可能如此），强大（几乎所有其他节点形式的解析模块）将仅将特定部分视为文件。