101 lines
3.3 KiB
Python
101 lines
3.3 KiB
Python
#!/usr/bin/env python
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"""
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qr - Convert stdin (or the first argument) to a QR Code.
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When stdout is a tty the QR Code is printed to the terminal and when stdout is
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a pipe to a file an image is written. The default image format is PNG.
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"""
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import sys
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import optparse
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import os
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import qrcode
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# The next block is added to get the terminal to display properly on MS platforms
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if sys.platform.startswith(('win', 'cygwin')):
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import colorama
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colorama.init()
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default_factories = {
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'pil': 'qrcode.image.pil.PilImage',
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'pymaging': 'qrcode.image.pure.PymagingImage',
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'svg': 'qrcode.image.svg.SvgImage',
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'svg-fragment': 'qrcode.image.svg.SvgFragmentImage',
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'svg-path': 'qrcode.image.svg.SvgPathImage',
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}
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error_correction = {
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'L': qrcode.ERROR_CORRECT_L,
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'M': qrcode.ERROR_CORRECT_M,
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'Q': qrcode.ERROR_CORRECT_Q,
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'H': qrcode.ERROR_CORRECT_H,
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}
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def main(args=None):
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if args is None:
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args = sys.argv[1:]
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from pkg_resources import get_distribution
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version = get_distribution('qrcode').version
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parser = optparse.OptionParser(usage=__doc__.strip(), version=version)
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parser.add_option(
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"--factory", help="Full python path to the image factory class to "
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"create the image with. You can use the following shortcuts to the "
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"built-in image factory classes: {0}.".format(
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", ".join(sorted(default_factories.keys()))))
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parser.add_option(
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"--optimize", type=int, help="Optimize the data by looking for chunks "
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"of at least this many characters that could use a more efficient "
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"encoding method. Use 0 to turn off chunk optimization.")
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parser.add_option(
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"--error-correction", type='choice',
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choices=sorted(error_correction.keys()), default='M',
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help="The error correction level to use. Choices are L (7%), "
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"M (15%, default), Q (25%), and H (30%).")
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opts, args = parser.parse_args(args)
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qr = qrcode.QRCode(
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error_correction=error_correction[opts.error_correction])
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if opts.factory:
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module = default_factories.get(opts.factory, opts.factory)
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if '.' not in module:
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parser.error("The image factory is not a full python path")
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module, name = module.rsplit('.', 1)
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imp = __import__(module, {}, [], [name])
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image_factory = getattr(imp, name)
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else:
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image_factory = None
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if args:
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data = args[0]
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else:
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# Use sys.stdin.buffer if available (Python 3) avoiding
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# UnicodeDecodeErrors.
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stdin_buffer = getattr(sys.stdin, 'buffer', sys.stdin)
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data = stdin_buffer.read()
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if opts.optimize is None:
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qr.add_data(data)
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else:
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qr.add_data(data, optimize=opts.optimize)
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if image_factory is None and os.isatty(sys.stdout.fileno()):
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qr.print_ascii(tty=True)
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return
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img = qr.make_image(image_factory=image_factory)
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sys.stdout.flush()
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# Use sys.stdout.buffer if available (Python 3), avoiding
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# UnicodeDecodeErrors.
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stdout_buffer = getattr(sys.stdout, 'buffer', None)
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if not stdout_buffer:
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if sys.platform == 'win32': # pragma: no cover
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import msvcrt
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msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
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stdout_buffer = sys.stdout
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img.save(stdout_buffer)
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if __name__ == "__main__":
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main()
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