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