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Added initial support for converting office documents (only ods and docx tested)

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This commit is contained in:
Roberto Rosario
2011-04-23 22:20:30 -04:00
parent 221049100c
commit 46ec25b139
4 changed files with 51 additions and 39 deletions
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82
apps/converter/api.py
View File

@@ -11,10 +11,10 @@ from converter.conf.settings import DEFAULT_OPTIONS
from converter.conf.settings import LOW_QUALITY_OPTIONS
from converter.conf.settings import HIGH_QUALITY_OPTIONS
from converter.conf.settings import GRAPHICS_BACKEND
from converter.conf.settings import UNOCONV_PATH
from converter.exceptions import UnpaperError
from converter.exceptions import UnpaperError, OfficeConversionError
#from converter.conf.settings import UNOCONV_PATH
from common import TEMPORARY_DIRECTORY
from converter import TRANFORMATION_CHOICES
from documents.utils import document_save_to_temp_dir
@@ -26,7 +26,11 @@ QUALITY_HIGH = u'quality_high'
QUALITY_SETTINGS = {QUALITY_DEFAULT: DEFAULT_OPTIONS,
QUALITY_LOW: LOW_QUALITY_OPTIONS, QUALITY_HIGH: HIGH_QUALITY_OPTIONS}
CONVERTER_OFFICE_FILE_EXTENSIONS = [
u'ods', u'docx'
]
def _lazy_load(fn):
_cached = []
@@ -65,17 +69,17 @@ def execute_unpaper(input_filepath, output_filepath):
return_code = proc.wait()
if return_code != 0:
raise UnpaperError(proc.stderr.readline())
"""
def execute_unoconv(input_filepath, output_filepath, arguments=''):
command = [UNOCONV_PATH]
command.extend(['--stdout'])
command.extend(shlex.split(str(arguments)))
def execute_unoconv(input_filepath, arguments=''):
command = []
command.append(UNOCONV_PATH)
command.extend(unicode(arguments).split())
command.append(input_filepath)
proc = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
with open(output_filepath, 'w') as output:
shutil.copyfileobj(proc.stdout, output)
return (proc.wait(), proc.stderr.read())
"""
proc = subprocess.Popen(command, close_fds=True, stderr=subprocess.PIPE)
return_code = proc.wait()
if return_code != 0:
raise OfficeConversionError(proc.stderr.readline())
def cache_cleanup(input_filepath, size, quality=QUALITY_DEFAULT, page=0, file_format=u'jpg', extra_options=u''):
@@ -102,43 +106,45 @@ def create_image_cache_filename(input_filepath, *args, **kwargs):
return None
def convert_office_document(input_filepath):
if os.path.exists(UNOCONV_PATH):
execute_unoconv(input_filepath, arguments='-f pdf')
return input_filepath + u'.pdf'
return None
def convert(document, size, quality=QUALITY_DEFAULT, page=0, file_format=u'jpg', extra_options=u'', cleanup_files=True, zoom=100, rotation=0):
#unoconv_output = None
unoconv_output = None
output_filepath = create_image_cache_filename(document.checksum, size=size, page=page, file_format=file_format, quality=quality, extra_options=extra_options, zoom=zoom, rotation=rotation)
if os.path.exists(output_filepath):
return output_filepath
input_filepath = document_save_to_temp_dir(document, document.checksum)
'''
if extension:
if extension.lower() == 'ods':
unoconv_output = '%s_pdf' % output_filepath
status, error_string = execute_unoconv(input_filepath, unoconv_output, arguments='-f pdf')
if status:
errors = get_errors(error_string)
raise ConvertError(status, errors)
cleanup(input_filepath)
input_filepath = unoconv_output
'''
if document.file_extension.lower() in CONVERTER_OFFICE_FILE_EXTENSIONS:
result = convert_office_document(input_filepath)
if result:
unoconv_output = result
input_filepath = result
extra_options = u''
input_arg = u'%s[%s]' % (input_filepath, page)
extra_options += u' -resize %s' % size
if zoom != 100:
extra_options += u' -resize %d%% ' % zoom
if rotation != 0 and rotation != 360:
extra_options += u' -rotate %d ' % rotation
if format == u'jpg':
extra_options += u' -quality 85'
try:
input_arg = u'%s[%s]' % (input_filepath, page)
extra_options += u' -resize %s' % size
if zoom != 100:
extra_options += u' -resize %d%% ' % zoom
if rotation != 0 and rotation != 360:
extra_options += u' -rotate %d ' % rotation
if format == u'jpg':
extra_options += u' -quality 85'
backend.execute_convert(input_filepath=input_arg, arguments=extra_options, output_filepath=u'%s:%s' % (file_format, output_filepath), quality=quality)
finally:
if cleanup_files:
cleanup(input_filepath)
#if unoconv_output:
#cleanup(unoconv_output)
if unoconv_output:
cleanup(unoconv_output)
return output_filepath

1
apps/converter/conf/settings.py
View File

@@ -8,6 +8,7 @@ UNPAPER_PATH = getattr(settings, 'CONVERTER_UNPAPER_PATH', u'/usr/bin/unpaper')
GM_PATH = getattr(settings, 'CONVERTER_GM_PATH', u'/usr/bin/gm')
GM_SETTINGS = getattr(settings, 'CONVERTER_GM_SETTINGS', u'')
GRAPHICS_BACKEND = getattr(settings, 'CONVERTER_GRAPHICS_BACKEND', u'converter.backends.imagemagick')
UNOCONV_PATH = getattr(settings, 'CONVERTER_UNOCONV_PATH', u'/usr/bin/unoconv')
OCR_OPTIONS = getattr(settings, 'CONVERTER_OCR_OPTIONS', u'-colorspace Gray -depth 8 -resample 200x200')
DEFAULT_OPTIONS = getattr(settings, 'CONVERTER_DEFAULT_OPTIONS', u'')

4
apps/converter/exceptions.py
View File

@@ -27,3 +27,7 @@ class UnkownConvertError(ConvertError):
identify the kind of error
'''
pass
class OfficeConversionError(ConvertError):
pass

3
apps/main/views.py
View File

@@ -83,7 +83,8 @@ def check_settings(request):
{'name': 'CONVERTER_GRAPHICS_BACKEND',
'value': converter_settings.GRAPHICS_BACKEND,
'description': converter_settings.setting_description},
{'name': 'CONVERTER_UNOCONV_PATH',
'value': converter_settings.UNOCONV_PATH, 'exists': True},
{'name': 'CONVERTER_OCR_OPTIONS', 'value': converter_settings.OCR_OPTIONS},
{'name': 'CONVERTER_DEFAULT_OPTIONS', 'value': converter_settings.DEFAULT_OPTIONS},
{'name': 'CONVERTER_LOW_QUALITY_OPTIONS', 'value': converter_settings.LOW_QUALITY_OPTIONS},