Can't update plugins

[Patrick Derwael]

Hi there,

I'm having 2 issues with plugins; here is the 1st one:

When trying to get additional plugins (Preferences > Get plugins to enhance Calibre), I get the following error message:

calibre, version 3.32.0
ERROR: Update Check Failed: Unable to reach the plugin index page.

Traceback (most recent call last):
File "site-packages\calibre\gui2\dialogs\plugin_updater.py", line 441, in __init__
File "site-packages\calibre\gui2\dialogs\plugin_updater.py", line 65, in read_available_plugins
File "site-packages\calibre\utils\https.py", line 202, in get_https_resource_securely
File "httplib.py", line 1278, in connect
File "ssl.py", line 353, in wrap_socket
File "ssl.py", line 601, in __init__
File "ssl.py", line 830, in do_handshake
SSLEOFError: EOF occurred in violation of protocol (_ssl.c:590)

This happens when connecting through the proxy. It all goes fine with a direct internet connection
The (not so) funny thing is that downloading metadata & covers works OK through the proxy and with a direct connection

Any help would me very welcome!


Here is the debug log

calibre Debug log
calibre 3.32 [64bit] embedded-python: True is64bit: True
Windows-7-6.1.7601-SP1 Windows ('64bit', 'WindowsPE')
('Windows', '7', '6.1.7601')
Python 2.7.12+
Windows: ('7', '6.1.7601', 'SP1', u'Multiprocessor Free')
Interface language: None
calibre 3.32 [64bit] embedded-python: True is64bit: True
Windows-7-6.1.7601-SP1 Windows ('64bit', 'WindowsPE')
('Windows', '7', '6.1.7601')
Python 2.7.12+
Windows: ('7', '6.1.7601', 'SP1', u'Multiprocessor Free')
Interface language: None
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 72.035450517 x 72.0
Using calibre Qt style: True
[0.00] Starting up...
[0.00] Showing splash screen...
[0.06] splash screen shown
[0.06] Initializing db...
[0.26] db initialized
[0.26] Constructing main UI...
[2.42] main UI initialized...
[2.42] Hiding splash screen
Failed to check for calibre update: EOF occurred in violation of protocol (_ssl.c:590)
[10.37] splash screen hidden
[10.37] Started up in 10.37 seconds with 6257 books

[kovidgoyal]

updating plugins uses private https certificates, your proxy presumably unwraps https traffic so cannot handle that.

Download the plugin zip files manually using a browser and install them directly.

[Patrick Derwael]

Originally Posted by kovidgoyal

your proxy presumably unwraps https traffic so cannot handle that.

Hi,

Bypassing the proxy would indeed be a workaround, but I cannot consider this as a solution
The reason is that downloading metadata & covers goes successfully over https

The question becomes then: why is one https connection handled properly while the other one fails ?

[kovidgoyal]

I already told you why, because it uses private https certificate, which prevent your proxy from interfering with the https traffic like it does with https traffic that uses public certificates.

[theducks]

Patrick
Plugins are NOT hosted on Kovids servers.
The server supplies the certificate. Public Certificates co$t
If you wish to maintain your network configuration, do as Kovid suggests:
Go to the Plugins Section of this forum and use the Index (a sticky) to locate the specific PI thread: then download the Current PI (usually in post #1 ); open Preference: Miscellaneous: Plugins: use the appropriat buttons near the bottom to Remove / Add a PI from file

[Patrick Derwael]

Originally Posted by theducks

Plugins are NOT hosted on Kovids servers.
The server supplies the certificate

Thanks a lot for the explanation!
I can live with about anything if I understand the reasons why

Actually, as bypassing the proxy is just 2 clicks and a password away, and I know how to do this, I will keep using this workaround

If I start messing around with prefs, downloads, adding and removing stuff, knowing me, I'm pretty sure I will end up screwing my PC...

Thanks again!