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53 lines
1.5 KiB
Python
53 lines
1.5 KiB
Python
import re
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LINK_SPLIT = re.compile(',\s*(?=[<])')
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LINK_SEG_SPLIT = re.compile(';\s*')
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LINK_URL = re.compile('<(.*)>')
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LINK_PROP = re.compile('([\w]+)="([^"]+)')
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#=================================================================
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class MementoUtils(object):
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@staticmethod
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def parse_links(link_header, def_name='timemap'):
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links = LINK_SPLIT.split(link_header)
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results = {}
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mementos = []
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for link in links:
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props = LINK_SEG_SPLIT.split(link)
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m = LINK_URL.match(props[0])
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if not m:
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raise Exception('Invalid Link Url: ' + props[0])
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result = dict(url=m.group(1))
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key = ''
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is_mem = False
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for prop in props[1:]:
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m = LINK_PROP.match(prop)
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if not m:
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raise Exception('Invalid prop ' + prop)
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name = m.group(1)
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value = m.group(2)
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if name == 'rel':
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if 'memento' in value:
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is_mem = True
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result[name] = value
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elif value == 'self':
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key = def_name
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else:
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key = value
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else:
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result[name] = value
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if key:
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results[key] = result
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elif is_mem:
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mementos.append(result)
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results['mementos'] = mementos
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return results
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