prrswr@ Thanks for the issue.

Unable to reproduce the issue on Ubuntu 14.04, Windows 7 and Mac OS 10.12.6 using latest Stable 60.0.3112.113, canary 62.0.3198.0 with the below steps

1. Launched Chrome and started to download a test file of 100 MB size.
2. Disconnected from the network and the file download stopped.
3. Reconnected to the network and could observe that the file download resumed from where it stopped.
Please find the attached screen cast and confirm if anything is missed here.

Request you to retry the issue on a new profile without any flags/extensions and update the thread if the issue still exists.

Thanks...

Deleted: 758568.webm 5.1 MB

	758568.webm 5.1 MB View Download

Is there a download link that this is happening on?  Thanks!

It looks like you mentioned a file on drive.  We can try to see if large drive files are not resumable.  It depends on the response headers.

I looked at the server response from drive, that it doesn't contain the headers for resumption in the middle. But we need to look into it more closely.

In the current code for the final response that actually do the download, server must supply headers like "Accept-Ranges" or "Content-Range" in a 206 response for Chrome to resume in the middle.

However, response from driver server contains "Access-Control-Allow-Headers" that contains a "Content-Range" in the list, that this is a preflight request during cross origin, and might be an implication of being able to resume in the middle.

Another thing is Access-Control-Allow-Headers presents as the final URLRequest for download, I'm not sure if it is glued in from preflight http request or the server just include this as the final response.

Yes. I am trying to download the file from Google drive.

What is the conclusion ?
Are you guys fixing it or not ?

Filed a bug to drive. 

In order to make Chrome download resumption works, we need a bunch of headers. However I think drive front end can request those headers in their COR request. If Chrome has those headers, resumption will work. But currently it's unclear that if drive can provide those things.