我想到了。我在客户端犯了一个小错误。
这里是使用 Formidable 上传 XHR 的工作示例
You 不需要设置任何边界或特殊标题。
Client
var formData = new FormData();
var xhr = new XMLHttpRequest();
var onProgress = function(e) {
if (e.lengthComputable) {
var percentComplete = (e.loaded/e.total)*100;
}
};
var onReady = function(e) {
// ready state
};
var onError = function(err) {
// something went wrong with upload
};
formData.append('files', file);
xhr.open('post', '/up', true);
xhr.addEventListener('error', onError, false);
xhr.addEventListener('progress', onProgress, false);
xhr.send(formData);
xhr.addEventListener('readystatechange', onReady, false);
Server
app.post('/up', function(req, res) {
var form = new formidable.IncomingForm();
form.uploadDir = __dirname + '/tmp';
form.encoding = 'binary';
form.addListener('file', function(name, file) {
// do something with uploaded file
});
form.addListener('end', function() {
res.end();
});
form.parse(req, function(err, fields, files) {
if (err) {
console.log(err);
}
});
});