tScanning and parsing QR codes using computer's camera. - electrum - Electrum Bitcoin wallet
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---
DIR commit b21ebc0da4b5d7f726b18e007101cf9553203c0e
DIR parent 09c8e956e13627a6250c3a9b12573ab6ac744956
HTML Author: slush <info@bitcoin.cz>
Date: Thu, 2 Aug 2012 15:18:06 +0200
Scanning and parsing QR codes using computer's camera.
Diffstat:
A lib/qrscanner.py | 75 +++++++++++++++++++++++++++++++
1 file changed, 75 insertions(+), 0 deletions(-)
---
DIR diff --git a/lib/qrscanner.py b/lib/qrscanner.py
t@@ -0,0 +1,75 @@
+from util import print_error
+
+try:
+ import zbar
+except ImportError:
+ print_error("Install zbar package to enable QR scans")
+ zbar = None
+
+from urlparse import urlparse, parse_qs
+
+def is_available():
+ if not zbar:
+ return False
+ return True
+
+def scan_qr():
+ proc = zbar.Processor()
+ proc.init()
+ proc.visible = True
+
+ while True:
+ try:
+ proc.process_one()
+ except:
+ # User closed the preview window
+ return {}
+
+ for r in proc.results:
+ if str(r.type) != 'QRCODE':
+ continue
+
+ return parse_uri(r.data)
+
+def parse_uri(uri):
+ if ':' not in uri:
+ # It's just an address (not BIP21)
+ return {'address': uri}
+
+ if '//' not in uri:
+ # Workaround for urlparse, it don't handle bitcoin: URI properly
+ uri = uri.replace(':', '://')
+
+ uri = urlparse(uri)
+ result = {'address': uri.netloc}
+
+ if uri.path.startswith('?'):
+ params = parse_qs(uri.path[1:])
+ else:
+ params = parse_qs(uri.path)
+
+ for k,v in params.items():
+ if k in ('amount', 'label', 'message'):
+ result[k] = v[0]
+
+ return result
+
+if __name__ == '__main__':
+ # Run some tests
+
+ assert(parse_uri('1Marek48fwU7mugmSe186do2QpUkBnpzSN') ==
+ {'address': '1Marek48fwU7mugmSe186do2QpUkBnpzSN'})
+
+ assert(parse_uri('bitcoin://1Marek48fwU7mugmSe186do2QpUkBnpzSN') ==
+ {'address': '1Marek48fwU7mugmSe186do2QpUkBnpzSN'})
+
+ assert(parse_uri('bitcoin:1Marek48fwU7mugmSe186do2QpUkBnpzSN') ==
+ {'address': '1Marek48fwU7mugmSe186do2QpUkBnpzSN'})
+
+ assert(parse_uri('bitcoin:1Marek48fwU7mugmSe186do2QpUkBnpzSN?amount=10') ==
+ {'amount': '10', 'address': '1Marek48fwU7mugmSe186do2QpUkBnpzSN'})
+
+ assert(parse_uri('bitcoin:1Marek48fwU7mugmSe186do2QpUkBnpzSN?amount=10&label=slush&message=Small%20tip%20to%20slush') ==
+ {'amount': '10', 'label': 'slush', 'message': 'Small tip to slush', 'address': '1Marek48fwU7mugmSe186do2QpUkBnpzSN'})
+
+