Author Topic: Calibre Download Size Incorrect  (Read 1396 times)

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January 03, 2020, 07:01:46 pm

garioch7

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Calibre Download Size Incorrect
« on: January 03, 2020, 07:01:46 pm »
I noticed that when I am updating Calibre that the download size always shows as 340 KB, but the download takes VERY long time for 340 KB.  I checked an old Calibre installer file (3.44.0) and it was 62,576 KB, which would explain the long download times on my slow, rural Internet speed.

Have a great day.

Regards,
-Phil
Bleeping Computer Malware Response Instructor

Reply #1January 05, 2020, 11:45:24 am

Curson

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Re: Calibre Download Size Incorrect
« Reply #1 on: January 05, 2020, 11:45:24 am »
Hi Phil,

Thanks for your feedback.
It seems the issue is also affecting other software. We will investigate it as soon as possible.

Have a nice week.
Regards.

Reply #2January 05, 2020, 05:59:30 pm

garioch7

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Re: Calibre Download Size Incorrect
« Reply #2 on: January 05, 2020, 05:59:30 pm »
Curzon:

Thank you for your fast reply.  It could be affecting other software and I would not have noticed, but with the Calibre updates being so large, this was noticeable to me.  The first time it happened, I just ignored it and figured it might have been a glitch at my end (slow Internet), but when it happened again, I thought that I should report it, after having eliminated my ultra slow rural Internet speeds as the issue.

Happy hunting and have a great day.

Regards,
-Phil
Bleeping Computer Malware Response Instructor

Reply #3January 06, 2020, 06:24:40 pm

Curson

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Re: Calibre Download Size Incorrect
« Reply #3 on: January 06, 2020, 06:24:40 pm »
Hi Phil,

We identified the issue and a fix is not currently possible.
At the time being, the size matches the one displayed by the Add/Remove Programs control panel. However, when a software installer is not writing itself its size (using the EstimatedSize Registry value), Windows has to "guess" it and it's not quite efficient; see How does Add/Remove Programs get the size and other information?.

So, if Windows guessed the size wrong, UCheck size will also be off.

Another approach, would be to probe each download links and check the returned Content-Length HTTP entity header to get the size of the installer itself. Unfortunately, some servers don't return this header, so it's not an efficient solution.

We will probably change the way UCheck retrieves the sizes in the future but it will require extensive refactoring, so it will take time.

Have a nice day.
Regards.
« Last Edit: January 06, 2020, 06:26:45 pm by Curson »

Reply #4January 06, 2020, 09:17:53 pm

garioch7

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Re: Calibre Download Size Incorrect
« Reply #4 on: January 06, 2020, 09:17:53 pm »
Thanks, Curzon, for the explanation.  Not a huge problem for sure, just a bit misleading.  Perhaps you might consider just removing the download size information in the interim ... ?

Have a great day.

Regards,
-Phil
Bleeping Computer Malware Response Instructor

Reply #5January 07, 2020, 12:28:56 pm

Curson

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Re: Calibre Download Size Incorrect
« Reply #5 on: January 07, 2020, 12:28:56 pm »
Hi Phil,

You are very welcome.
I just asked Tigzy and he said he wants the sizes to be consistent with the ones displayed in the Add/Remove Programs control panel, so it's very unlikely they will be removed.

Have a nice day, too.
Regards.

Reply #6January 08, 2020, 12:19:37 pm

garioch7

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Re: Calibre Download Size Incorrect
« Reply #6 on: January 08, 2020, 12:19:37 pm »
Curzon:

There is definitely something wrong here, in light of Tigzy's statement about taking the installer file size from Add/Remove Programs.

UCheck is telling me that the download was 340 KB (see the screen snip in my original post), but my "Add/Remove Programs" size listing is 340 MB.

Thank you and have a great day.

Regards,
-Phil
Bleeping Computer Malware Response Instructor

Reply #7January 08, 2020, 04:25:37 pm

Curson

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Re: Calibre Download Size Incorrect
« Reply #7 on: January 08, 2020, 04:25:37 pm »
Hi Phil,

Thanks again for your help.
This one is clearly a bug on our side. We will fix it as soon as possible.

Have a nice day.
Regards.

Reply #8January 09, 2020, 06:25:49 pm

garioch7

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Re: Calibre Download Size Incorrect
« Reply #8 on: January 09, 2020, 06:25:49 pm »
Curzon:

Many thanks for the outstanding client service.

Have a great day.

Regards,
-Phil
Bleeping Computer Malware Response Instructor

Reply #9January 09, 2020, 10:02:27 pm

Curson

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Re: Calibre Download Size Incorrect
« Reply #9 on: January 09, 2020, 10:02:27 pm »
Hi Phil,

You are very welcome.
UCheck V3.5.1 was released today and the bug should now be fixed. Could you please give it a try ?

Have a nice day, too.
Regards.

Reply #10January 10, 2020, 05:10:00 pm

garioch7

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Re: Calibre Download Size Incorrect
« Reply #10 on: January 10, 2020, 05:10:00 pm »
Curzon:

Thank you for your reply.  I just did a UCheck scan, but no programs needed updating, so I will report back when next Calibre needs to be updated.

Have a great weekend.

Regards,
-Phil
Bleeping Computer Malware Response Instructor

Reply #11January 10, 2020, 07:28:55 pm

Curson

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Re: Calibre Download Size Incorrect
« Reply #11 on: January 10, 2020, 07:28:55 pm »
Hi Phil,

Thanks.

Have a nice weekend, too.
Regards.

Reply #12January 24, 2020, 06:55:10 pm

garioch7

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Re: Calibre Download Size Incorrect
« Reply #12 on: January 24, 2020, 06:55:10 pm »
Curzon:

Updating Calibre now via UCheck.  Download size correct.  All is good.  Thank you and have a great weekend.

Regards,
-Phil
Bleeping Computer Malware Response Instructor

Reply #13January 26, 2020, 06:57:30 pm

Curson

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Re: Calibre Download Size Incorrect
« Reply #13 on: January 26, 2020, 06:57:30 pm »
Hi Phil,

Thanks for the feedback again.
I'm glad this bug is now resolved.

Have a nice week.
Regards.