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from urllib import urlencode
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from json import loads
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from collections import Iterable
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search_url = None
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url_query = None
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content_query = None
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title_query = None
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suggestion_query = ''
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results_query = ''
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# parameters for engines with paging support
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#
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# number of results on each page
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# (only needed if the site requires not a page number, but an offset)
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page_size = 1
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# number of the first page (usually 0 or 1)
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first_page_num = 1
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def iterate(iterable):
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if type(iterable) == dict:
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it = iterable.iteritems()
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else:
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it = enumerate(iterable)
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for index, value in it:
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yield str(index), value
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def is_iterable(obj):
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if type(obj) == str:
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return False
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if type(obj) == unicode:
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return False
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return isinstance(obj, Iterable)
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def parse(query):
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q = []
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for part in query.split('/'):
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if part == '':
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continue
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else:
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q.append(part)
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return q
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def do_query(data, q):
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ret = []
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if not q:
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return ret
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qkey = q[0]
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for key, value in iterate(data):
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if len(q) == 1:
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if key == qkey:
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ret.append(value)
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elif is_iterable(value):
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ret.extend(do_query(value, q))
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else:
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if not is_iterable(value):
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continue
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if key == qkey:
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ret.extend(do_query(value, q[1:]))
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else:
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ret.extend(do_query(value, q))
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return ret
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def query(data, query_string):
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q = parse(query_string)
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return do_query(data, q)
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def request(query, params):
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query = urlencode({'q': query})[2:]
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fp = {'query': query}
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if paging and search_url.find('{pageno}') >= 0:
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fp['pageno'] = (params['pageno'] - 1) * page_size + first_page_num
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params['url'] = search_url.format(**fp)
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params['query'] = query
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return params
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def response(resp):
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results = []
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json = loads(resp.text)
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if results_query:
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for result in query(json, results_query)[0]:
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url = query(result, url_query)[0]
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title = query(result, title_query)[0]
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content = query(result, content_query)[0]
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results.append({'url': url, 'title': title, 'content': content})
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else:
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for url, title, content in zip(
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query(json, url_query),
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query(json, title_query),
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query(json, content_query)
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):
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results.append({'url': url, 'title': title, 'content': content})
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if not suggestion_query:
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return results
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for suggestion in query(json, suggestion_query):
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results.append({'suggestion': suggestion})
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return results
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