Characters forbidden or not recommended when saving to disk

Horus68 · 10-02-2019, 12:47 PM

Is there a list of characters that should not be used in the "save to disk" templates.
I know some are forbidden as : that will be converted into _ when saving a file to disk (export).
Is there some list of forbidden or a list of "not recommended" characters?

Example
What if I want to use straight brackets [] as a separator in fields? Can this be a problem for some file system later?

Code:

{author_sort:}{series:| [|}{series_index:||]}{title:| - |}

Saving a file as:

Code:

Doe, John [Series-03] - Book Title.pdf

theducks · 10-02-2019, 02:08 PM

Square Bkts are used all the time

Colon, Dollar, Ampersand, Star, Question mark and any Non-ASCII are either prohibited or best avoided.

IMHO use _ instead of spaces as some file system want encoding and that messes with searches...

Horus68 · 10-02-2019, 05:58 PM

Thanks for your suggestions!

davidfor · 10-03-2019, 02:20 AM

As you have a Kobo device, the following is run over the filename after it is constructed:

Code:

invalid_filename_chars_re = re.compile(r'[\/\\\?%\*:;\|\"\'><\$!]', re.IGNORECASE | re.UNICODE)
return [invalid_filename_chars_re.sub('_', x) for x in components]

Any character that matches that regex will be replaced. Stripping out the escape characters, and putting a space between them, the list is:

Code:

/ \ ? % * : ; | " ' > < $ !

Horus68 · 10-03-2019, 09:24 AM

Thanks.
On the save to disk template dialog, I will also use the option "Replace spaces with underscore" so no spaces will be outputted to file names (as the values from the title field)

The only issue is for the "Stripping out the escape characters" as a space is added between them.
See related: https://www.mobileread.com/forums/sh...d.php?t=310144

Tanjamuse · 10-06-2019, 11:18 AM

I have the following template:

Code:

{#status}/{#fandoms:re(:, )}/{#story_id}/{#story_id}

I was wondering if I can add more to the fandom?

I would like to change one character to another as well as remove the :?

+ to something like &

Can anyone help me?

JSWolf · 10-06-2019, 11:29 AM

Quote:

Originally Posted by theducks

Square Bkts are used all the time

Colon, Dollar, Ampersand, Star, Question mark and any Non-ASCII are either prohibited or best avoided.

IMHO use _ instead of spaces as some file system want encoding and that messes with searches...

Spaces are not an issue for Windows. No need for an underscore.

theducks · 10-06-2019, 11:44 AM

Quote:

Originally Posted by JSWolf

Spaces are not an issue for Windows. No need for an underscore.

Not for Windows. For some apps

Ealdwulf · 10-19-2019, 03:34 AM

and I have run into some programs on Micro$oft Windoze that do not properly save (save as works though) when trying to save a file you edit that is stored in a folder with [] in the folder name

BetterRed · 10-19-2019, 04:41 PM

Quote:

Originally Posted by Ealdwulf

and I have run into some programs on Micro$oft Windoze that do not properly save (save as works though) when trying to save a file you edit that is stored in a folder with [] in the folder name

I suggest it has nothing to do with Windows as such. I have dozens of files and folders with '[' and ']' in the names. The '[' sorts after '$' and before '_'. Some of them I've had since Win 2000 and earlier.

Caveat but they're not created, read or written by calibre.

BR

10-02-2019, 12:47 PM	#1
Horus68 Zealot Posts: 143 Karma: 76596 Join Date: Feb 2015 Location: Portugal Device: Kobo Aura HD	Characters forbidden or not recommended when saving to disk Is there a list of characters that should not be used in the "save to disk" templates. I know some are forbidden as : that will be converted into _ when saving a file to disk (export). Is there some list of forbidden or a list of "not recommended" characters? Example What if I want to use straight brackets [] as a separator in fields? Can this be a problem for some file system later? Code: {author_sort:}{series:\| [\|}{series_index:\|\|]}{title:\| - \|} Saving a file as: Code: Doe, John [Series-03] - Book Title.pdf Last edited by Horus68; 10-02-2019 at 12:51 PM.

10-03-2019, 02:20 AM	#4
davidfor Grand Sorcerer Posts: 24,905 Karma: 47303824 Join Date: Jul 2011 Location: Sydney, Australia Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos	As you have a Kobo device, the following is run over the filename after it is constructed: Code: invalid_filename_chars_re = re.compile(r'[\/\\\?%\:;\\|\"\'><\$!]', re.IGNORECASE \| re.UNICODE) return [invalid_filename_chars_re.sub('_', x) for x in components] Any character that matches that regex will be replaced. Stripping out the escape characters, and putting a space between them, the list is: Code: / \ ? % : ; \| " ' > < $ !

10-03-2019, 09:24 AM	#5
Horus68 Zealot Posts: 143 Karma: 76596 Join Date: Feb 2015 Location: Portugal Device: Kobo Aura HD	Thanks. On the save to disk template dialog, I will also use the option "Replace spaces with underscore" so no spaces will be outputted to file names (as the values from the title field) The only issue is for the "Stripping out the escape characters" as a space is added between them. See related: https://www.mobileread.com/forums/sh...d.php?t=310144 Last edited by Horus68; 10-03-2019 at 09:28 AM.

10-06-2019, 11:18 AM	#6
Tanjamuse Wizard Posts: 1,327 Karma: 5306 Join Date: Jan 2014 Device: none	I have the following template: Code: {#status}/{#fandoms:re(:, )}/{#story_id}/{#story_id} I was wondering if I can add more to the fandom? I would like to change one character to another as well as remove the :? + to something like & Can anyone help me?

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10-02-2019, 02:08 PM	#2
theducks Well trained by Cats Posts: 31,057 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Square Bkts are used all the time Colon, Dollar, Ampersand, Star, Question mark and any Non-ASCII are either prohibited or best avoided. IMHO use _ instead of spaces as some file system want encoding and that messes with searches...

10-02-2019, 05:58 PM	#3
Horus68 Zealot Posts: 143 Karma: 76596 Join Date: Feb 2015 Location: Portugal Device: Kobo Aura HD	Thanks for your suggestions!

10-19-2019, 03:34 AM	#9
Ealdwulf Enthusiast Posts: 34 Karma: 10 Join Date: Jun 2012 Device: Nook	and I have run into some programs on Micro$oft Windoze that do not properly save (save as works though) when trying to save a file you edit that is stored in a folder with [] in the folder name

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