Calibre with SSL, Content Server not loading

[aCIDsLAM]

Hello, i really like the SSL Feature and its working like it should,
using the https://calibreFQDN:8080/opds URL for external Reader APPS or in the Webbrowser

But using the Main Url the Content Server gets stuck and doesnt load the preview images anymore. Gets timeouts, just shows the book title without picture preview or stopps completly with this message:

Failed to communicate with "interface-data/more-books?library_id=Calibre-Bibliothek", timed out after: 30 seconds

The CPU Load is really low and should be the cause, also the harddisk i/o should. The content server works fine, without ssl.

I tried to set the work count parameter but didnt notice any difference.

[kovidgoyal]

Are you using a valid certificate or a self signed one? It might be that the browser is blocking access when using a self signed one. Check if you can load

/interface-data/more-books

using curl or another command line tool.

[aCIDsLAM]

Originally Posted by kovidgoyal

Are you using a valid certificate or a self signed one? It might be that the browser is blocking access when using a self signed one. Check if you can load

/interface-data/more-books

using curl or another command line tool.

Its a valid ceftificate so no blocking.
curl gave me this, without auth enabled:
Invalid query: No JSON object could be decoded

I must say, i tried a stresstest through the opds view/link.
It is more stable but after a while it also stops working. The server stops to respond and i cant load the next page. I have to relogin/auth and start again from the beginng.

The same like the main web view, just it takes longer until i get problems.

SOmetimes when the preview fails, i get the picture of the book clicking on it. Sometimes it fails all together. After a while (2-3 Pages) i cant load the next page and get stuck and have to relogin in too.

It seems to me, like it gets worse with every page. The first page shows 80 %, the next one 30 and the last one maybe only one working

While browsing i also got these two. DOnt know if they help:
Uncaught TypeError: Cannot read property 'firstChild' of null
Error at https://calibre.FQDN:8080/:19495:21
Traceback (most recent call last):
at ct_impl (https://calibre.FQDN:8080/:7016:26)
at HTMLDivElement.check_for_books_loaded (https://calibre.FQDN:8080/:19666:13)
at create_books_list (https://calibre.FQDN:8080/:19616:13)
at abort_get_more_books (https://calibre.FQDN:8080/:19505:52)
at XMLHttpRequest.ρσ_anonfunc (https://calibre.FQDN:8080/:4864:21)
at complete_callback (https://calibre.FQDN:8080/:4853:17)
at got_more_books (https://calibre.FQDN:8080/:19522:13)
at update_fetching_status (https://calibre.FQDN:8080/:19495:21)
TypeError: Cannot read property 'firstChild' of null

TypeError: more is null
Error at https://calibre.FQDN:8080/:19495:17

Console output sometimes throws this. Dont know, if its related:
QObject::startTimer: Timers can only be used with threads started with QThread

To mention again, i dont have this problems when it runs encrypted.

[kovidgoyal]

Originally Posted by aCIDsLAM

To mention again, i dont have this problems when it runs encrypted.

I'm confused are you saying you have this problem when running with SSL or dont have it when running with SSL?

[aCIDsLAM]

Originally Posted by kovidgoyal

I'm confused are you saying you have this problem when running with SSL or dont have it when running with SSL?

Sorry. that was a typo. I mean i dont have the problems, when its unencrypted. Only when its encrypted, using the ssl cert.

[kovidgoyal]

I found a bug with SSL on linux/macOS https://github.com/kovidgoyal/calibr...c4e23caf38254d

So it should be fixed in the next release assuming you are running the server on one of those OSes.

[aCIDsLAM]

Originally Posted by kovidgoyal

I found a bug with SSL on linux/macOS https://github.com/kovidgoyal/calibr...c4e23caf38254d

So it should be fixed in the next release assuming you are running the server on one of those OSes.

No, Windows Server 2016 Core Server (Without GUI) and no opelgl.dll
But nice, that it helped you, to find a bug.

[kovidgoyal]

Check in the server log if there are any errors. You can use --log and --access-log to specify paths to error and access logs respectively

[aCIDsLAM]

Originally Posted by kovidgoyal

Check in the server log if there are any errors. You can use --log and --access-log to specify paths to error and access logs respectively

There you go.

[kovidgoyal]

This should take care of it: https://github.com/kovidgoyal/calibr...33279677a390a9

[kovidgoyal]

Actually, my fix was incorrect, this is the correct fix:
https://github.com/kovidgoyal/calibr...86efe754de85a2

so you will have to wait for 3.2

[aCIDsLAM]

Originally Posted by kovidgoyal

Actually, my fix was incorrect, this is the correct fix:
https://github.com/kovidgoyal/calibr...86efe754de85a2

so you will have to wait for 3.2

Ok, no problem. Im glad, you found the problem

[aCIDsLAM]

Originally Posted by kovidgoyal

Actually, my fix was incorrect, this is the correct fix:
https://github.com/kovidgoyal/calibr...86efe754de85a2

so you will have to wait for 3.2

If you included it in 3.1.1, i must say the problem sill seems to exist and i have to capture futher logs maybe.

[kovidgoyal]

Yes it is included. If the problem is stil happening then more server logs are needed.

[aCIDsLAM]

Originally Posted by kovidgoyal

Yes it is included. If the problem is stil happening then more server logs are needed.

I ran it quite a while with the --log switch, i still get the same problems data not loading (next books, preview images) and
"Failed to communicate with "/interface-data/more-books?library_id=Calibre-Bibliothek", timed out after: 30 seconds" errors but the only entrys i get, are not from me, some port scan access from the Internet, you see below

Is there more i can do?

Unhandled exception in state: State: do_ssl_handshake Client: 46.174.191.32:32744 Request: WebSocketConnection
Traceback (most recent call last):
File "site-packages\calibre\srv\loop.py", line 536, in tick
File "site-packages\calibre\srv\loop.py", line 177, in do_ssl_handshake
SSLError: [SSL: HTTP_REQUEST] http request (_ssl.c:590)

calibre server listening on 0.0.0.0:8080
Unhandled exception in state: State: do_ssl_handshake Client: 60.191.38.77:2559 Request: WebSocketConnection
Traceback (most recent call last):
File "site-packages\calibre\srv\loop.py", line 536, in tick
File "site-packages\calibre\srv\loop.py", line 177, in do_ssl_handshake
SSLError: [SSL: HTTP_REQUEST] http request (_ssl.c:590)