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"""
Yahoo (Web)
@website https://search.yahoo.com/web
@provide-api yes (https://developer.yahoo.com/boss/search/),
$0.80/1000 queries
@using-api no (because pricing)
@results HTML (using search portal)
@stable no (HTML can change)
@parse url, title, content, suggestion
"""
from urllib import urlencode
from urlparse import unquote
from lxml import html
from searx.engines.xpath import extract_text, extract_url
# engine dependent config
categories = ['general']
paging = True
language_support = True
time_range_support = True
# search-url
base_url = 'https://search.yahoo.com/'
search_url = 'search?{query}&b={offset}&fl=1&vl=lang_{lang}'
search_url_with_time = 'search?{query}&b={offset}&fl=1&vl=lang_{lang}&age={age}&btf={btf}&fr2=time'
supported_languages_url = 'https://search.yahoo.com/web/advanced'
# specific xpath variables
results_xpath = "//div[contains(concat(' ', normalize-space(@class), ' '), ' Sr ')]"
url_xpath = './/h3/a/@href'
title_xpath = './/h3/a'
content_xpath = './/div[@class="compText aAbs"]'
suggestion_xpath = "//div[contains(concat(' ', normalize-space(@class), ' '), ' AlsoTry ')]//a"
time_range_dict = {'day': ['1d', 'd'],
'week': ['1w', 'w'],
'month': ['1m', 'm']}
# remove yahoo-specific tracking-url
def parse_url(url_string):
endings = ['/RS', '/RK']
endpositions = []
start = url_string.find('http', url_string.find('/RU=') + 1)
for ending in endings:
endpos = url_string.rfind(ending)
if endpos > -1:
endpositions.append(endpos)
if start == 0 or len(endpositions) == 0:
return url_string
else:
end = min(endpositions)
return unquote(url_string[start:end])
def _get_url(query, offset, language, time_range):
if time_range in time_range_dict:
return base_url + search_url_with_time.format(offset=offset,
query=urlencode({'p': query}),
lang=language,
age=time_range_dict[time_range][0],
btf=time_range_dict[time_range][1])
return base_url + search_url.format(offset=offset,
query=urlencode({'p': query}),
lang=language)
def _get_language(params):
if params['language'] == 'all':
return 'en'
elif params['language'][:2] == 'zh':
if params['language'] == 'zh' or params['language'] == 'zh-CH':
return 'szh'
else:
return 'tzh'
else:
return params['language'].split('-')[0]
# do search-request
def request(query, params):
if params['time_range'] and params['time_range'] not in time_range_dict:
return params
offset = (params['pageno'] - 1) * 10 + 1
language = _get_language(params)
params['url'] = _get_url(query, offset, language, params['time_range'])
# TODO required?
params['cookies']['sB'] = 'fl=1&vl=lang_{lang}&sh=1&rw=new&v=1'\
.format(lang=language)
return params
# get response from search-request
def response(resp):
results = []
dom = html.fromstring(resp.text)
try:
results_num = int(dom.xpath('//div[@class="compPagination"]/span[last()]/text()')[0]
.split()[0].replace(',', ''))
results.append({'number_of_results': results_num})
except:
pass
# parse results
for result in dom.xpath(results_xpath):
try:
url = parse_url(extract_url(result.xpath(url_xpath), search_url))
title = extract_text(result.xpath(title_xpath)[0])
except:
continue
content = extract_text(result.xpath(content_xpath)[0])
# append result
results.append({'url': url,
'title': title,
'content': content})
# if no suggestion found, return results
suggestions = dom.xpath(suggestion_xpath)
if not suggestions:
return results
# parse suggestion
for suggestion in suggestions:
# append suggestion
results.append({'suggestion': extract_text(suggestion)})
# return results
return results
# get supported languages from their site
def _fetch_supported_languages(resp):
supported_languages = []
dom = html.fromstring(resp.text)
options = dom.xpath('//div[@id="yschlang"]/span/label/input')
for option in options:
code = option.xpath('./@value')[0][5:].replace('_', '-')
supported_languages.append(code)
return supported_languages
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