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HTML Input: Handle malformed OPF files when converting. Fixes #1215924 [Mobipocket conversion fail with error TypeError: Invalid input object: NoneType](https://bugs.launchpad.net/calibre/+bug/1215924) When reading metadata from OPF files during conversion, the OPF was serialized in ascii with no encoding declaration which could break for some bad OPF files.
calibre
calibre is an e-book manager. It can view, convert and catalog e-books in all of the major e-book formats. It can also talk to e-book reader devices. It can go out to the internet and fetch metadata for your books. It can download newspapers and convert them into e-books for convenient reading. It is cross platform, running on Linux, Windows and OS X.
For more information, see the calibre About page
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Usage
See the User Manual
Development
Setting up a development environment for calibre
A tarball of the source code for the current calibre release.
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