The very first chunk is not getting uploaded

[subhashreehazra]

Prerequisites

• I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• The issue still exists against the latest master branch of bootstrap-fileinput.
• This is not an usage question. I confirm having read the plugin documentation and demos.
• This is not a general programming / coding question. (Those should be directed to the webtips Q & A forum).
• I have attempted to find the simplest possible steps to reproduce the issue.
• I have included a failing test as a pull request (Optional).

Steps to reproduce the issue

1. Go to Resumable Uploads Demo in plugins.krajee.com for file-input plugin.
2. Open Network tab by doing an inspect element on the same page.
3. Upload a zip file, large enough, under Resumable Scenario # 1 an keep and eye on network tab.

Expected behavior and actual behavior

When I follow those steps, I see that the upload url is called recursively with every chunk to upload, status being pending , with gradually changes to status 200, except the very first chunk. The status stays pending which changes to status 400 and the upload fails.
I tried to implement this plugin in my web application and ran into the same issue.
I was expecting all the chunks to get uploaded having status 200.

@kartik-v kindly have a look into it.

Environment

Browsers

• Google Chrome
• Mozilla Firefox
• Internet Explorer
• Safari

Operating System

• Windows
• Mac OS X
• Linux
• Mobile

Libraries

• jQuery version:
• bootstrap-fileinput version:

Isolating the problem

• This bug happens on the plugin demos page
• The bug happens consistently across all tested browsers
• This bug happens when using bootstrap-fileinput without other plugins
• I can reproduce this bug in a jsbin