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 Null Images
PostPosted: Sun Nov 18, 2018 7:56 pm 
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I've noticed a lot of null images recently, often followed by the player mentioning something in the game thread about pics not showing after a successful upload. Any idea why an upload would return an image key, but subsequent access returns a null image? I guess I've always figured it was an issue with the player's connection, but it seems to be happening more often and people seem confident they've sent pics correctly.


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 Re: Null Images
PostPosted: Mon Nov 19, 2018 11:37 am 
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Possibly a problem with the june changes correcting some picture upload. I'll need to get some more information (what fails, when..)


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 Re: Null Images
PostPosted: Tue Nov 20, 2018 7:19 am 
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I've never seen it happen to me (that I know of), but the symptoms are:

- player sends a normal jpeg via sendImage
- sendImage returns a valid key after upload
- receiveImage with the correct key returns a null string

This has happened in Courtroom (especially), Spin the Bottle, Strip or Die, Human Paperboard (and likely others). Note that the image key is almost NEVER retrieved immediately, so there's likely some time that passes between when a player sends and when another player receives.

This wouldn't be a security feature, would it? For example, accepting the image and immediately deleting if from a "bad" IP address...


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 Re: Null Images
PostPosted: Tue Nov 20, 2018 12:33 pm 
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Possibly a security feature, but not likely. I guess an error in some algorithms server side.

If possible I'd like to know an example of image key that fails, from anybody.


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 Re: Null Images
PostPosted: Wed Nov 21, 2018 6:13 am 
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doti wrote:
Possibly a security feature, but not likely. I guess an error in some algorithms server side.

If possible I'd like to know an example of image key that fails, from anybody.


Next time I see it, I'll grab the key and report it.


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 Re: Null Images
PostPosted: Wed Dec 12, 2018 3:05 pm 
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doti wrote:
If possible I'd like to know an example of image key that fails, from anybody.


Hi Doti, I've seen this happening more and more recently and finally remembered this thread. It seems 37cfce64.jpeg is a good example.

My scripts all do null checking, but in this case the file exists and is returned as 0 bytes, so the script continues and then runs into trouble. I checked this file on both Mac and PC and they both have the same issue.

It would be great if the sexscripts server would return null in this case instead. Otherwise, we need to check all images for null, and then also check the byte length.

Thanks for your help!


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 Re: Null Images
PostPosted: Sun Dec 16, 2018 1:48 pm 
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The file was not on the server. Most probably it was removed because without any access 14 days after its upload ; possibly something else.
3 updates :
- This removal period is increased from 14 to 30 days
- An error will occur (sendImage wll fail) if the file cannot be saved on the server
- (sexScripts release from today) A good null value will be received if the image code has no matching on the server


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 Re: Null Images
PostPosted: Mon Dec 17, 2018 4:02 am 
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doti wrote:
- This removal period is increased from 14 to 30 days
- An error will occur (sendImage wll fail) if the file cannot be saved on the server
- (sexScripts release from today) A good null value will be received if the image code has no matching on the server


Thank you very much! This will make a big difference and should fix a lot of issues.


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 Re: Null Images
PostPosted: Tue Feb 26, 2019 12:31 pm 
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Hi @doti,

We've been running into an image problem in Courtroom fairly regularly--it seems related to the null image thing. Players upload successfully, but when people go to view the evidence there's nothing there. Here are two recent examples: 5345293d and e1c1f573. Any insight you could provide from the server side would be really useful in debugging. Thanks!


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 Re: Null Images
PostPosted: Fri Mar 01, 2019 1:12 pm 
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Do you know how many time elapsed between upload and first download ?


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 Re: Null Images
PostPosted: Sat Mar 02, 2019 2:52 am 
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doti wrote:
Do you know how many time elapsed between upload and first download ?


Since these were from Courtroom it would have been a relatively short time. Under 72 hours I'm guessing. Some cases in Courtroom have a longer evidence gathering time, so the images get uploaded and nobody views them for a few days, then they're needed for the trial. Perhaps that's related to the problem? Maybe when the evidence gathering time is short it works, and when long it runs into trouble?


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 Re: Null Images
PostPosted: Mon Mar 04, 2019 8:03 pm 
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If an image is never ever seen, it is deleted. I can check but I'll say 30 days later.

But 72h means there's a bug. I've a hard time to investigate, I can see nothing in the (light) logs about those images.
I'll add some more logs I think, I have no idea of the problem.


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