upload file failed

[lran-git]

I'm trying to setup a file uploader service, following Total.js UI Builder: How to Upload Files.
I put a file uploader with a upload button, when I click upload button, get errors in console:

spa.min@20.js:14 Uncaught SyntaxError: Failed to execute 'open' on 'XMLHttpRequest': '' is not a valid HTTP method.
    at ce.AJAX.ce.UPLOAD (spa.min@20.js:14:82263)
    at instance.upload (eval at <anonymous> (uibuilder.js:1:34743), <anonymous>:44:4)
    at HTMLInputElement.eval (eval at <anonymous> (uibuilder.js:1:34743), <anonymous>:19:13)
    at HTMLInputElement.dispatch (spa.min@20.js:2:40035)
    at v.handle (spa.min@20.js:2:38006)
ce.AJAX.ce.UPLOAD @ spa.min@20.js:14
instance.upload @ VM173:44
eval @ VM173:19
dispatch @ spa.min@20.js:2
v.handle @ spa.min@20.js:2
spa.min@20.js:14 Uncaught SyntaxError: Failed to execute 'open' on 'XMLHttpRequest': '' is not a valid HTTP method.
    at ce.AJAX.ce.UPLOAD (spa.min@20.js:14:82263)
    at instance.upload (eval at <anonymous> (uibuilder.js:1:34743), <anonymous>:44:4)
    at HTMLInputElement.eval (eval at <anonymous> (uibuilder.js:1:34743), <anonymous>:19:13)
    at HTMLInputElement.dispatch (spa.min@20.js:2:40035)
    at v.handle (spa.min@20.js:2:38006)
ce.AJAX.ce.UPLOAD @ spa.min@20.js:14
instance.upload @ VM173:44
eval @ VM173:19
dispatch @ spa.min@20.js:2
v.handle @ spa.min@20.js:2

[lran-git]

Change url form to POST /url, file uploaded succesfully.
In j-FileUploader, I got this info:

IMPORTANT: in jComponent v20, the value of opt.url must be in the form POST /url/

Now, I got another issue, my file uploader component was in a form, read from path was set to doc, after file uploaded, doc was still null, seems like the file uploader hasn't get response, so I'm stuck again, need help, please.