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Issue 847196 link

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Issue metadata

Status: WontFix
Owner:
Closed: May 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Android
Pri: 2
Type: Bug



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Download restart from 0% when switching the network from wi fi to mobile data

Reported by jagdis...@samsung.com, May 28 2018

Issue description

Example URL:
http://dandeacon.com/mp3/01%20Silly%20Hat%20vs.%20Egale%20Hat/Silly%20Hat%20vs%20Egale%20Hat.zip

Steps to reproduce the problem:
Connect the device with  wi fi and mobile data should be there
1. start download from wifi
2. During download off the wi fi and network should be changed to mobile data
3. After a few seconds the download progress will start again from 0%
Issue will happen in vice versa case also.

What is the expected behavior?
Download should resume from interuppted state.

What went wrong?
Download restart from 0% when switching the network from wi fi to mobile data

Did this work before? N/A 

Chrome version: 66.0.3359.158  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version:
 
Labels: Needs-triage-Mobile
Cc: pnangunoori@chromium.org
Components: UI>Browser>Downloads
Labels: FoundIn-66 M-69 Triaged-Mobile FoundIn-67 Target-69 FoundIn-68 FoundIn-69
Status: Untriaged (was: Unconfirmed)
Tested the issue in Android and able to reproduce the issue by switching the WiFi networks. Similar behavior is observed since Chrome #60.0.3072.0

Steps Followed:
1. Launched the Chrome Browser.
2. Navigate to the URL: http://dandeacon.com/mp3/01%20Silly%20Hat%20vs.%20Egale%20Hat/Silly%20Hat%20vs%20Egale%20Hat.zip
3. Switch to the another WiFi network.
4. Observed that, download starts from the beginning.

Chrome versions tested:
60.0.3072.0, 66.0.3359.158(Stable), 68.0.3441.0(Canary)

OS:
Android 7.0.0

Android Devices:
Samsung J7

This seems to be a Non-Regression issue as same behavior is seen since M-60.  Untriaged for further input's on this issue.

Please navigate to below link for log's and screen cast--
go/chrome-androidlogs/847196

Thanks!

Comment 3 by mmenke@chromium.org, May 29 2018

Components: -Internals>Network
Download resumption is purely handled by download code.
Owner: qin...@chromium.org
Status: Assigned (was: Untriaged)
This is probably because the download doesn't have strong validators.  +qinmin@ can you check?

Comment 5 by qin...@chromium.org, May 31 2018

Status: WontFix (was: Assigned)
The response header doesn't contain etag or last-modified, so resumption will restart from beginning.

HTTP/1.1 200 OK
Date: Thu, 31 May 2018 20:21:22 GMT
Content-Type: application/zip
Content-Length: 83140848
Connection: keep-alive
Server: Apache/2
Accept-Ranges: bytes
Age: 0

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