geting xpconnect wrapped nsIFile when passing file in formdata

[Ashwin Devarajan]

Hi,

I am trying to pass file [FileUtils.getFile()] in a formdata object to be
send to server in XMLHttpRequest. But all I get at server side is in
xpconnect wrapped nsIFile.

what I think is I am sending a xpcom wrapped file object to the formdata.
If in this case how can I send an actual file in formdata to be sent to
server?

Thanks in advance,
Aswin Devarajan
- Programmer Analyst, Firefox Student Ambassador
aswin5.github.io

[David Rajchenbach-Teller]

Hi Ashwin,

If you use a XHR, you need to send the contents of the file, rather
than the file itself. If you are using XPCOM, as seems to be the case, I
suggest using `OS.File.read` to read the contents of the file, it's
simpler and faster than going through `FileUtils`.

However, I don't suggest using XPCOM for your add-on – it's on the way
out. There may be a way to read local files using the WebExtensions API,
which is way more robust and future-proof. Perhaps using the `downloads`
API [1]?

Cheers,
David

[1] https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/downloads

> _______________________________________________
> dev-extensions mailing list
> dev-ext...@lists.mozilla.org
> https://lists.mozilla.org/listinfo/dev-extensions
>

[Ashwin Devarajan]

Hi David,

Thank you.

I am getting my file.

I am developing an extension for thunderbird and I didn't find much
material on
internet to develop an thunderbird extension with web APIs. Most of them
are build using
XPCOM and XUL. That's why I choose to go with old ways.

Cheers,
Ashwin

- Programmer Analyst
aswin5.github.io