Quote:
Originally Posted by autoklus
Hi BenChen, love the effort you put in! 
Too bad my problem with FBReader isn't fixed with version 1.60. I've done some troubleshooting, and believe a malformed(?) header is the culprit - see the attached image.
- I downloaded Tolstoy's War and Peace (with images) from here and changed the title to " War and Peace and more" using your app (that's all I did). FBReader didn't recognize the saved file.
- I unzipped the contents and recompressed them to ZIP/EPUB using WinRAR (starting with the mimetype file). FBReader could perfectly recognize & read this (and it also reads zip files and loose folder structures). Ergo, the metadata is well-formed enough** & you can create a valid ePub using WinRAR - I wasn't sure. 
- Lastly, I imported & exported "your" epub file using Calibre. Then I compared all the headers in a hex editor (WinHex).
Your file header looks different from the other three. "META-INF", i.e. the directory structure, begins at a different offset.
Attachment 155890
I've looked up the ZIP file format on Wikipedia  - the order and position of things after "mimetype" shouldn't matter, except I see no reason why ePub...Editor should insert something new before META-INF/container.xml, or what the 16 bytes of "garbage" in segment 2 (3A-49) mean.
In this ebook, only "mimetype" is in the root folder.
Attachment 155889
I re-tested this with another ePub from Project Gutenberg - your program creates these headers consistently, and always inserts the exact same string of "PK..oa«,........". 
** I noticed your app also changes some meta-xmlns attributes, and if a field like "subject" gets cleared/emptied it omits the closing tag, but that's not strictly necessary AFAIK
btw, where are you planning to go with your app? An mp3tag for ePubs would be great - I'd love to batch-remove all the "subjects" (tags) from my collection... |
Hi autoklus,
I cannot recreate your problem. When I make changes to the metadata using EPUBMetadataEditor, I can still open the books in FBReader afterwards. (I'm using FBReader 0.12.10.)
I'm not planning on doing anything else with the program besides fixing bugs. It does everything I want it to! And you can already do a batch-remove in the Batch Operations area using the "replace" option with an empty replace string.
Sincerely,
Ben.