forked from Ponysearch/Ponysearch
122 lines
3.6 KiB
Python
122 lines
3.6 KiB
Python
from lxml import html
|
|
from urllib import urlencode, unquote
|
|
from urlparse import urlparse, urljoin
|
|
from lxml.etree import _ElementStringResult, _ElementUnicodeResult
|
|
from searx.utils import html_to_text
|
|
|
|
search_url = None
|
|
url_xpath = None
|
|
content_xpath = None
|
|
title_xpath = None
|
|
suggestion_xpath = ''
|
|
results_xpath = ''
|
|
|
|
# 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
|
|
|
|
|
|
'''
|
|
if xpath_results is list, extract the text from each result and concat the list
|
|
if xpath_results is a xml element, extract all the text node from it
|
|
( text_content() method from lxml )
|
|
if xpath_results is a string element, then it's already done
|
|
'''
|
|
|
|
|
|
def extract_text(xpath_results):
|
|
if type(xpath_results) == list:
|
|
# it's list of result : concat everything using recursive call
|
|
result = ''
|
|
for e in xpath_results:
|
|
result = result + extract_text(e)
|
|
return result.strip()
|
|
elif type(xpath_results) in [_ElementStringResult, _ElementUnicodeResult]:
|
|
# it's a string
|
|
return ''.join(xpath_results)
|
|
else:
|
|
# it's a element
|
|
text = html.tostring(xpath_results, encoding='unicode', method='text', with_tail=False)
|
|
text = text.strip().replace('\n', ' ')
|
|
return ' '.join(text.split())
|
|
|
|
|
|
def extract_url(xpath_results, search_url):
|
|
if xpath_results == []:
|
|
raise Exception('Empty url resultset')
|
|
url = extract_text(xpath_results)
|
|
|
|
if url.startswith('//'):
|
|
# add http or https to this kind of url //example.com/
|
|
parsed_search_url = urlparse(search_url)
|
|
url = parsed_search_url.scheme + url
|
|
elif url.startswith('/'):
|
|
# fix relative url to the search engine
|
|
url = urljoin(search_url, url)
|
|
|
|
# normalize url
|
|
url = normalize_url(url)
|
|
|
|
return url
|
|
|
|
|
|
def normalize_url(url):
|
|
parsed_url = urlparse(url)
|
|
|
|
# add a / at this end of the url if there is no path
|
|
if not parsed_url.netloc:
|
|
raise Exception('Cannot parse url')
|
|
if not parsed_url.path:
|
|
url += '/'
|
|
|
|
# FIXME : hack for yahoo
|
|
if parsed_url.hostname == 'search.yahoo.com'\
|
|
and parsed_url.path.startswith('/r'):
|
|
p = parsed_url.path
|
|
mark = p.find('/**')
|
|
if mark != -1:
|
|
return unquote(p[mark + 3:]).decode('utf-8')
|
|
|
|
return url
|
|
|
|
|
|
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 = []
|
|
dom = html.fromstring(resp.text)
|
|
if results_xpath:
|
|
for result in dom.xpath(results_xpath):
|
|
url = extract_url(result.xpath(url_xpath), search_url)
|
|
title = extract_text(result.xpath(title_xpath))
|
|
content = extract_text(result.xpath(content_xpath))
|
|
results.append({'url': url, 'title': title, 'content': content})
|
|
else:
|
|
for url, title, content in zip(
|
|
(extract_url(x, search_url) for
|
|
x in dom.xpath(url_xpath)),
|
|
map(extract_text, dom.xpath(title_xpath)),
|
|
map(extract_text, dom.xpath(content_xpath))
|
|
):
|
|
results.append({'url': url, 'title': title, 'content': content})
|
|
|
|
if not suggestion_xpath:
|
|
return results
|
|
for suggestion in dom.xpath(suggestion_xpath):
|
|
results.append({'suggestion': extract_text(suggestion)})
|
|
return results
|