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extZ metadata: Read and write first opf file found in archive.

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This commit is contained in:
John Schember 2011-04-12 19:53:04 -04:00
parent d5119f0c2f
commit 1d6521aa5e
1 changed files with 21 additions and 5 deletions
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26
src/calibre/ebooks/metadata/extz.py
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@ -25,14 +25,30 @@ def get_metadata(stream, extract_cover=True):
with TemporaryDirectory('_untxtz_mdata') as tdir:
try:
zf = ZipFile(stream)
zf.extract('metadata.opf', tdir)
with open(os.path.join(tdir, 'metadata.opf'), 'rb') as opff:
mi = OPF(opff).to_book_metadata()
with ZipFile(stream) as zf:
opf_name = get_first_opf_name(stream)
opf_stream = StringIO(zf.read(opf_name))
mi = OPF(opf_stream).to_book_metadata()
except:
return mi
return mi
def set_metadata(stream, mi):
opf = StringIO(metadata_to_opf(mi))
safe_replace(stream, 'metadata.opf', opf)
try:
opf_name = get_first_opf_name(stream)
except:
opf_name = 'metadata.opf'
safe_replace(stream, opf_name, opf)
def get_first_opf_name(stream):
with ZipFile(stream) as zf:
names = zf.namelist()
opfs = []
for n in names:
if n.endswith('.opf') and '/' not in n:
opfs.append(n)
if not opfs:
raise Exception('No OPF found')
opfs.sort()
return opfs[0]