@@ -0,0 +1,31 @@
1+from flask_babel import gettext
2+import re
3+from urlparse import urlparse, parse_qsl
4+
5+regex = re.compile(r'10\.\d{4,9}/[^\s]+')
6+
7+name = gettext('DOAI rewrite')
8+description = gettext('Avoid paywalls by redirecting to open-access versions of publications when available')
9+default_on = False
10+
11+
12+def extract_doi(url):
13+ match = regex.search(url.path)
14+ if match:
15+ return match.group(0)
16+ for _, v in parse_qsl(url.query):
17+ match = regex.search(v)
18+ if match:
19+ return match.group(0)
20+ return None
21+
22+
23+def on_result(request, ctx):
24+ doi = extract_doi(ctx['result']['parsed_url'])
25+ if doi and len(doi) < 50:
26+ for suffix in ('/', '.pdf', '/full', '/meta', '/abstract'):
27+ if doi.endswith(suffix):
28+ doi = doi[:-len(suffix)]
29+ ctx['result']['url'] = 'http://doai.io/' + doi
30+ ctx['result']['parsed_url'] = urlparse(ctx['result']['url'])
31+ return True