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## Stackoverflow (It)
#
# @website https://stackoverflow.com/
# @provide-api not clear (https://api.stackexchange.com/docs/advanced-search)
#
# @using-api no
# @results HTML
# @stable no (HTML can change)
# @parse url, title, content
from urlparse import urljoin
from cgi import escape
from urllib import urlencode
from lxml import html
# engine dependent config
categories = ['it']
paging = True
# search-url
url = 'http://stackoverflow.com/'
search_url = url+'search?{query}&page={pageno}'
# specific xpath variables
results_xpath = '//div[contains(@class,"question-summary")]'
link_xpath = './/div[@class="result-link"]//a|.//div[@class="summary"]//h3//a'
title_xpath = './/text()'
content_xpath = './/div[@class="excerpt"]//text()'
# do search-request
def request(query, params):
params['url'] = search_url.format(query=urlencode({'q': query}),
pageno=params['pageno'])
return params
# get response from search-request
def response(resp):
results = []
dom = html.fromstring(resp.text)
# parse results
for result in dom.xpath(results_xpath):
link = result.xpath(link_xpath)[0]
href = urljoin(url, link.attrib.get('href'))
title = escape(' '.join(link.xpath(title_xpath)))
content = escape(' '.join(result.xpath(content_xpath)))
# append result
results.append({'url': href,
'title': title,
'content': content})
# return results
return results
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