44 lines
1.6 KiB
Python
44 lines
1.6 KiB
Python
import shlex
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import subprocess
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from converter.conf.settings import IM_IDENTIFY_PATH
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from converter.conf.settings import IM_CONVERT_PATH
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from converter.api import QUALITY_DEFAULT, QUALITY_SETTINGS
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from converter.exceptions import ConvertError, UnknownFormat, \
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IdentifyError
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CONVERTER_ERROR_STRING_NO_DECODER = 'no decode delegate for this image format'
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def execute_identify(input_filepath, arguments):
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command = []
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command.append(IM_IDENTIFY_PATH)
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command.extend(shlex.split(str(arguments)))
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command.append(input_filepath)
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proc = subprocess.Popen(command, close_fds=True, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
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return_code = proc.wait()
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if return_code != 0:
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raise IdentifyError(proc.stderr.readline())
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return proc.stdout.read()
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def execute_convert(input_filepath, output_filepath, quality=QUALITY_DEFAULT, arguments=None):
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command = []
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command.append(IM_CONVERT_PATH)
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command.extend(shlex.split(str(QUALITY_SETTINGS[quality])))
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command.append(input_filepath)
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if arguments:
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command.extend(shlex.split(str(arguments)))
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command.append(output_filepath)
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proc = subprocess.Popen(command, close_fds=True, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
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return_code = proc.wait()
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if return_code != 0:
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#Got an error from convert program
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error_line = proc.stderr.readline()
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if CONVERTER_ERROR_STRING_NO_DECODER in error_line:
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#Try to determine from error message which class of error is it
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raise UnknownFormat
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else:
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raise ConvertError(error_line)
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