Screenshot Download Error with answer details not working

[benesche1]

Chrome is getting a Network error when I try to download a Screenshot while the answer details are displayed. Otherwise it works fine.
What's also weird is that Chrome isn't letting me open the picture in another tap when i displayed the answer details

[Scarwolf]

Thanks for reporting. Unfortunately I can not reproduce this.

Could you try opening the Dev-Console (F12) before clicking on the Download Screenshot Button and tell me what the Console says?

Also can you tell me what Poll you used?

[benesche1]

I looks like that it is only broken when you use the json of the "Das pr0 liebt Waffen" poll
https://pr0p0ll.com/?p=viewjson&id=539
With other json data the bug seems to be not reproducible.
Here is the Dev-Console you asked for:

[benesche1]

I tested a little bit and found another two polls with aren't downloadable, when Answer-Details are turned on.
The first is: https://pr0p0ll.com/?p=viewresults&id=710
Dev tools:

And the second one is: https://pr0p0ll.com/?p=viewresults&id=714
Dev tools:

[Scarwolf]

Thanks for reaching back. Unfortunately I can still not manage to reproduce this.

Since the poll is very long and the endresult-picture is 11471px in height, my guess is that the image will be displayed in Base64 it is sheer to big to be shown on some computers. Might relate to your PC specs.

In the future I will try to provide the auto-download feature for the screenshots again which will hopefully work on all major browsers.

[benesche1]

Ok. When you say it is spec related, do you think it is more a ram, CPU or configuration in general related problem.

[benesche1]

Update: I tested the pr0p0ll-viewer today with Microsoft Edge and one poll wich Chrome does not want to download works absolutely fine on Edge.
So i wonder if you also used a different browser than chrome for your testing.

[Scarwolf]

Hey, sorry for the late answer.

Yes, the pr0p0ll viewer has been tested on multiple browsers, but I usually aim to only provider Support from Chrome & Firefox due to their high market share.

I will test various polls with various browsers over the next few weeks and try to optimize the download as far as possible.

More example to reproduce along with the browser, version and OS are appreciated! :)

[benesche1]

My guess with this Issue in particular is, that it is no an issue with pr0p0ll-viewer and more an issue with the browser engines handling base64 to image conversion.
I used this poll: https://pr0p0ll.com/?p=viewresults&id=507 and tested it on Chrome, Edge and Firefox
Chrome: Won't donwnload at all
Edge: cuts of the picture at the second last question
Firefox: Won't display bars where edge cut the Picture off
And i also tested another base64 to image tool with had the same issues
Edge Screenshot:

Firefox screenshot:

Tested on: Windows 10 Version 1803 with 8 GB RAM and an i5-7200U

[RundesBalli]

Edge: cuts of the picture at the second last question

I don't know where I got that information from anymore.
According to my knowledge IE/Edge cuts images above 8xxx pixels in height.
Maybe this will help with the troubleshooting.

[Scarwolf]

You're right, IE cuts images which are greater than 8192px on one side. I guess this is the same for Edge until they've switched to Chromium.

I might add a warning for Edge/IE Users.

[benesche1]

I looked a little bit more around find the behavior of chrome really strange. With an image of 1710x15273 pixels (combined 26.116.830‬ pixels) we are not nearly at the limit but it won't let me download it. However, as a workaround, I can copy the image an past it into MS Paint and store it though this way. So you could add this as a note in the download section.

I also wounder why you guys can't reproduce the issue. Maybe my 8 GB of RAM aren't enough for Chrome to perform the operation?
As I also found out the issue isn't limited to pr0p0ll-viewer, but more a general issue of chrome handling images with large data url sources. Again is it my limited amount of ram available or have you guys a other idea why chrome behaves like this.

[Scarwolf]

So you are saying you can not download it by right clicking and selecting "Save"? What happens if you do?

[benesche1]

yes i can't download the pictures.
First of all Chrome is only letting me download and copy, not open in another tab as seen here:

And then, after Chrome started the download, it throws a network error

[Scarwolf]

Possible Solution: https://stackoverflow.com/questions/38781968/problems-downloading-big-filemax-15-mb-on-google-chrome

Going to try this later, and will notify you to test it out. @benesche1