COPS : Calibre OPDS PHP Server

[PepaBrno]

Thank you

[jajaX]

hello,

j'utilise Cops depuis des années avec succès mais depuis quelques temps, quand je veux télécharger un epub, via ebook reader sur mon smartphone ou directement sur l'interface web, le fichier est à 0kb !!

config :

pc1 (où est installé Calibre) =>
Asus X93SM-YZ065V sous KDE Neon avec Calibre 6.1

synchronisé via le client de Nextcloud

pc2 (où est installé COPS) =>
ASUS N53SN sous Kubuntu 20.04 Focal Fossa (64 bits)

- apache2
- Cops version 1.1.3
- php 7.4.3

donc, quand je veux télécharger un epub, à partir de COPS, via ebook reader ou l'interface web, le fichier pèse 0kb ! pourtant, le fichier synchronisé de pc1 vers pc2 ne fait pas 0kb.

j'ai déjà modifier mes 2 fichiers "config_default.php" et "config_local.php" pour mettre cette ligne à "1" et relancer apache 2.

$config['cops_use_url_rewriting'] = "1";

j'utilise un nom de domaine avec un certificat let's encrypt. j'ai avec l'adresse ip et sans htpps. ça ne donne rien.

une idée ?
merci

-----------------------------------------------

google translatte =>

Hello,

I have been using Cops successfully for years but for some time, when I want to download an epub, via ebook reader on my smartphone or directly on the web interface, the file is at 0kb!!

config:

pc1 (where Calibre is installed) =>
Asus X93SM-YZ065V running KDE Neon with Calibre 6.1

synchronized via the Nextcloud client

pc2 (where COPS is installed) =>
ASUS N53SN running Kubuntu 20.04 Focal Fossa (64-bit)

-apache2
-Cops version 1.1.3
-php 7.4.3

so, when I want to download an epub, from COPS, via ebook reader or the web interface, the file weighs 0kb! however, the synced file from pc1 to pc2 is not 0kb.

I have already modified my 2 files "config_default.php" and "config_local.php" to set this line to "1" and restart apache 2.

$config['cops_use_url_rewriting'] = "1";

I use a domain name with a let's encrypt certificate. I have with the ip address and without htpps. it gives nothing.

an idea ?
thank you

------------------------------------------------

Spoiler:

configcheckfull =>


Check if PHP version is correct
OK (7.4.3)
Check if GD is properly installed and loaded
OK
Check if Sqlite is properly installed and loaded
OK
Check if libxml is properly installed and loaded
OK
Check if Json is properly installed and loaded
OK
Check if mbstring is properly installed and loaded
OK
Check if intl is properly installed and loaded
OK
Check if Normalizer class is properly installed and loaded
OK
Check if the rendering will be done on client side or server side
Client side rendering
Check if Calibre database path is not an URL
Romans Star Wars Legends OK
Check if Calibre database file exists and is readable
Romans Star Wars Legends OK
Check if Calibre database file can be opened with PHP
Romans Star Wars Legends OK
Check if Calibre database file contains at least some of the needed tables
Romans Star Wars Legends OK
Check if all Calibre books are found

/home/server/nextcloud/jaja/files/Librairie/Bibliothèques_xxxx_xxxxx_(xxx)/xxx/xxxx/xxx.pdf
Check if Calibre database path is not an URL
Romans Star Wars Officiel OK
Check if Calibre database file exists and is readable
Romans Star Wars Officiel OK
Check if Calibre database file can be opened with PHP
Romans Star Wars Officiel OK
Check if Calibre database file contains at least some of the needed tables
Romans Star Wars Officiel OK
Check if all Calibre books are found
Check if Calibre database path is not an URL
Bibliothèque de livres OK
Check if Calibre database file exists and is readable
Bibliothèque de livres OK
Check if Calibre database file can be opened with PHP
Bibliothèque de livres OK
Check if Calibre database file contains at least some of the needed tables
Bibliothèque de livres OK
Check if all Calibre books are found
Check if Calibre database path is not an URL
Bibliothèque enfants OK
Check if Calibre database file exists and is readable
Bibliothèque enfants OK
Check if Calibre database file can be opened with PHP
Bibliothèque enfants OK
Check if Calibre database file contains at least some of the needed tables
Bibliothèque enfants OK
Check if all Calibre books are found

google translatte =>

Check if PHP version is correct
OK (7.4.3)
Check if GD is properly installed and loaded
OK
Check if Sqlite is properly installed and loaded
OK
Check if libxml is properly installed and loaded
OK
Check if Json is properly installed and loaded
OK
Check if mbstring is properly installed and loaded
OK
Check if intl is properly installed and loaded
OK
Check if Normalizer class is properly installed and loaded
OK
Check if the rendering will be done on client side or server side
Client side rendering
Check if Calibre database path is not an URL
Romans Star Wars Legends OK
Check if Calibre database file exists and is readable
Romans Star Wars Legends OK
Check if Calibre database file can be opened with PHP
Romans Star Wars Legends OK
Check if Calibre database file contains at least some of the needed tables
Romans Star Wars Legends OK
Check if all Calibre books are found

/home/server/nextcloud/jaja/files/Librairie/Bibliothèques_xxxx_xxxxx_(xxx)/xxx/xxxx/xxx.pdf
Check if Calibre database path is not an URL
Romans Star Wars Officiel OK
Check if Calibre database file exists and is readable
Romans Star Wars Officiel OK
Check if Calibre database file can be opened with PHP
Romans Star Wars Officiel OK
Check if Calibre database file contains at least some of the needed tables
Romans Star Wars Officiel OK
Check if all Calibre books are found
Check if Calibre database path is not an URL
Bibliothèque de livres OK
Check if Calibre database file exists and is readable
Bibliothèque de livres OK
Check if Calibre database file can be opened with PHP
Bibliothèque de livres OK
Check if Calibre database file contains at least some of the needed tables
Bibliothèque de livres OK
Check if all Calibre books are found
Check if Calibre database path is not an URL
Bibliothèque enfants OK
Check if Calibre database file exists and is readable
Bibliothèque enfants OK
Check if Calibre database file can be opened with PHP
Bibliothèque enfants OK
Check if Calibre database file contains at least some of the needed tables
Bibliothèque enfants OK
Check if all Calibre books are found

[mariosipad]

1 - no need to change both config_default.php and config_local.php. Only change config_local.php.
2 - no need to restart apache2 after a change in config_local.php.
3 - probably not needed to change $config['cops_use_url_rewriting'] = "0"; to “1”

However that does not solve your problem nor cause the problem.

Can you download a book from COPS with a desktop browser? (Edge, Firefox, Brave)

[jajaX]

Originally Posted by mariosipad

1 - no need to change both config_default.php and config_local.php. Only change config_local.php.
2 - no need to restart apache2 after a change in config_local.php.
3 - probably not needed to change $config['cops_use_url_rewriting'] = "0"; to “1”

However that does not solve your problem nor cause the problem.

Can you download a book from COPS with a desktop browser? (Edge, Firefox, Brave)

hi,

thanks for your answer.

I can download with my browser, yes. but the file weighs 0kb !

[mariosipad]

@jajaX
I started up my Raspberry PI (model 4b 4GB with RaspiOS (bullseye), kernel 5.15.32-v7l+, Apache/2.4.54 (Raspbian), PHP 7.4.30) so probably the same as yours.
And COPS 1.1.3 installed from the zip.

I tried some stuff but could not reproduce your error.

Can you please post your config_local.php (and any other changes you made to config_default.php).

Can you show the properties on the Raspberry Pi of a calibre library and an e-book that gives a 0Kb size after downloading.

Example: ( ls -l ./calibrefree )

drwxr-xr-x  4 pi pi   4096 Jun 25  2018 'Alexandre Dumas'
drwxr-xr-x 10 pi pi   4096 Jun 25  2018 'Arthur Conan Doyle'
drwxr-xr-x  3 pi pi   4096 Jun 25  2018 'H. G. Wells'
drwxr-xr-x  3 pi pi   4096 Jun 25  2018 'Jack London'
drwxr-xr-x  4 pi pi   4096 Jun 25  2018 'Lewis Carroll'
-rwxr-xr-x  1 pi pi 368640 Jun 25  2018  metadata.db
-rwxr-xr-x  1 pi pi  13569 Jun 25  2018  metadata_db_prefs_backup.json

cd ./calibrefree/Alexandre\ Dumas/The\ Three\ Musketeers\ \(7\)/
ls -l

-rwxr-xr-x 1 pi pi  543785 Jun 25  2018  cover.jpg
-rwxr-xr-x 1 pi pi 4381052 Jun 25  2018 'The Three Musketeers - Alexandre Dumas.epub'

[jajaX]

hi,

thanks for help

my config_local.php =>

<?php
    if (!isset($config))
        $config = array();
  
    /*
     * The directory containing calibre's metadata.db file, with sub-directories
     * containing all the formats.
     * BEWARE : it has to end with a /
     */
    $config['calibre_directory'] = array (
    "Romans Star Wars Legends" => "/home/server/nextcloud/jaja/files/Librairie/Bibliothèques_Star_Wars_Legends_(Romans)/", 
    "Romans Star Wars Officiel" => "/home/server/nextcloud/jaja/files/Librairie/Bibliothèque_Star_Wars_Officiel_(Romans)/",
    "Bibliothèque de livres" => "/home/server/nextcloud/jaja/files/Librairie/Bibliothèque_calibre/",
    "Bibliothèque enfants" => "/home/server/nextcloud/jaja/files/Librairie/Bibliothèque_enfants/");
    $config['calibre_internal_directory'] = array (
    "Romans Star Wars Legends" => "/home/server/nextcloud/jaja/files/Librairie/Bibliothèques_Star_Wars_Legends_(Romans)/", 
    "Romans Star Wars Officiel" => "/home/server/nextcloud/jaja/files/Librairie/Bibliothèque_Star_Wars_Officiel_(Romans)/",
    "Bibliothèque de livres" => "/home/server/nextcloud/jaja/files/Librairie/Bibliothèque_calibre/",
    "Bibliothèque enfants" => "/home/server/nextcloud/jaja/files/Librairie/Bibliothèque_enfants/");
    /*
     * Catalog's title
     */
    $config['cops_title_default'] = "Bibliothèque de JaJa";
    
    /*
     * use URL rewriting for downloading of ebook in HTML catalog
     * See README for more information
     *  1 : enable
     *  0 : disable
     */
    $config['cops_use_url_rewriting'] = "1";
    $config['cops_update_epub-metadata'];
    $config['cops_x_accel_redirect'] = "";
$config['cops_thumbnail_handling'] = "";
$config['cops_thumbnail_cache_directory'] = "/config/cache/";

an excerpt from my caliber library =>

drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Marilyn Manson'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Mario D.Dederichs'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Mario Puzo'
drwxrwxr-x  3 www-data www-data    4096 juin  15 21:52 'Mark Brake'
drwxrwxr-x  3 www-data www-data    4096 juin  15  2021 'Mark Manson'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Marlin Marynick'
drwxrwxr-x  3 www-data www-data    4096 oct.  22  2020 'Martel Frederic'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Martel, Frederic'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020  Martel,Frederic
drwxrwxr-x  6 www-data www-data    4096 oct.  19  2020 'Martha Wells'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Martin Kitchen'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Masson Philippe'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Matt Haig'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Matthew Fitzsimmons'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Matthieu BONAN'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Maurice Benroubi'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Maurice Rajsfus'
drwxrwxr-x  3 www-data www-data    4096 oct.  19  2020 'Max Cavalera'

on other =>

/nextcloud/jaja/files/Librairie/Bibliothèque_calibre/Max Cavalera$ ls -l
total 4
drwxrwxr-x 2 www-data www-data 4096 oct.  19  2020 'My Bloody Roots. De Sepultura a Soulfly et au-dela (1299)'

note : I use Cops with a domain name and a Let's Encrypt certificate. but i never had this problem...

[jajaX]

other info for this folder =>

/nextcloud/jaja/files/Librairie/Bibliothèque_calibre/Max Cavalera/My Bloody Roots. De Sepu
ltura a Soulfly et au-dela (1299)$ ls -l
total 6428
-rw-rw-r-- 1 www-data www-data  492584 août  25  2020  cover.jpg
-rw-rw-r-- 1 www-data www-data    5793 nov.  15  2020  metadata.opf
-rw-rw-r-- 1 www-data www-data 6074892 août  25  2020 'My Bloody Roots. De Sepultura a Soulfly et - Max Cavalera.epub'

when I want donwload this ebook, 0 kb again...

[mariosipad]

@jajaX
OK! I can now reproduce your error!

There is something wrong in your config_local.php.

You have $config['calibre_internal_directory'] = array (etc
(You already have $config['calibre_directory'] = array (etc. )
This causes the 0Kb e-books after download (I tested this and can confirm.)

In your setup with apache2 this should be $config['calibre_internal_directory'] = '';

A few other remarks for config_local.php:
- $config['cops_use_url_rewriting'] = "0"; "1" is probably not needed.
- missing $config['default_timezone'] = "Europe/Paris"; If you live in France put this in just to be on the safe side.
- $config['cops_update_epub-metadata'] = "0"; not complete in your (copy of) config_local.php
- is $config['cops_thumbnail_cache_directory'] = "/config/cache/"; an existing directory? I have $config['cops_thumbnail_cache_directory'] = "/var/www/html/cops/cache/"; I had to mkdir the cache directory myself.


I would say try out these "fixes" and let us know if you can use COPS for 100% once again!

[jajaX]

hi !!

yes ! yes ! yes !! it works !!!

big thanks for your help

[jaceygan]

Hi all.. this is my virgin post so hope this is the right place to ask for help for COPS.

My workflow is as follows:
1. Side load epub into Calibre on my MacBook
2. Resize or change book cover to 1872x1404
3. Cron job syncs local Calibre library to COPS library on Raspberry Pi.
4. Download epub from COPS to read.

The issue I face is that when I download the epub from COPS, the book cover image reverts to the original size before Step 2 is performed. It causes the thumbnails and book cover to be cutoff when displayed on my Kobo Aura One. The images displays fine on COPS.

To troubleshoot, I downloaded the same epub file by 2 ways on my macbook: 1 from the raspberry pi through scp; and 1 through COPS.

The epub file sizes are different with the difference coming from the cover image size. The one I downloaded via scp is as what I expect, so my guess is something is changed when COPs serves the book for download. I verified this by opening the epub with an ebook editor.

Transferring books through wired connection and kobo uncaged (KU) doesn't have this issue of book cover resize.

Is there some configuration I need to change to prevent this behavior?

Thanks.

[mariosipad]

@jaceygan
I’m a long time user, but I have never edited a book cover for size.
I have more or less the same hardware that you are using and also useyour workflow.

Can you send me (post here) a (preferably open source ) epub that you have edited for cover size to I can try myself?

[jaceygan]

Originally Posted by mariosipad

@jaceygan
I’m a long time user, but I have never edited a book cover for size.
I have more or less the same hardware that you are using and also useyour workflow.

Can you send me (post here) a (preferably open source ) epub that you have edited for cover size to I can try myself?

Thanks for your response.

I did some more troubleshooting and found the issue is actually from Calibre (still trying to find out if the issue is with Calbre itself or with the resizing plugin).

After changing the book cover image, the cover.jpg outside of the epub is updated but the book cover image in the epub itself is not. Only after I right click and select "Edit Book" from Calibre (without doing anything) then the image in the epub is updated.

COPS is sending me the book cover image fine now after I have selected "Edit Book" in Calibre and letting it sync on my rPi. Now I just need to find a way to automate this.

Thanks again for helping to look at my issue.

[machuni]

Hello all,

I was wondering if there was a way to specify a port for COPS so that I can access it outside of my LAN? I'm currently using it with a Raspberry Pi and NGINX. I'd like to set up port forwarding on my router so that I can access my library when I'm out and about. Thanks in advance!

[mariosipad]

@machuni
Do you use COPS on your Pi with docker?
COPS/NGINX is accessible on port 80 or port 443 with SSL.

For simplicity you can open/portforward port 80 on your router to the internal IP adres of your Pi. Then from the www you can access COPS with http://<LAN-IP>/cops

However this is NOT SAFE. What can you do?
1 - at least restrict access to COPS with a password. The easiest way is to use a setting in config_local.php. For example:
$config['cops_basic_authentication'] = array("username" => "cops", "password" => "cops");
2 - "Security bij obscurity": portforward (for example) external port 12345 to internal port 80. You then can access COPS by http://<WAN-IP>:12345/cops
3 - get a (free) domain name and use let's encrypt to securely access COPS by https//domainname/cops

[machuni]

This is exactly what I was looking for. I'll try setting it up later this week! Thank you! And I don't use docker. I want to take the time to learn it one day, but just haven't gotten around to it.

Originally Posted by mariosipad

@machuni
Do you use COPS on your Pi with docker?
COPS/NGINX is accessible on port 80 or port 443 with SSL.

For simplicity you can open/portforward port 80 on your router to the internal IP adres of your Pi. Then from the www you can access COPS with http://<LAN-IP>/cops

However this is NOT SAFE. What can you do?
1 - at least restrict access to COPS with a password. The easiest way is to use a setting in config_local.php. For example:
$config['cops_basic_authentication'] = array("username" => "cops", "password" => "cops");
2 - "Security bij obscurity": portforward (for example) external port 12345 to internal port 80. You then can access COPS by http://<WAN-IP>:12345/cops
3 - get a (free) domain name and use let's encrypt to securely access COPS by https//domainname/cops