Ponysearch/searx/engines/yahoo.py

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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
"""
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from urllib.parse import unquote, urlencode
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from lxml import html
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from searx.engines.xpath import extract_text, extract_url
from searx.utils import match_language, eval_xpath
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# engine dependent config
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categories = ['general']
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paging = True
language_support = True
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time_range_support = True
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# search-url
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base_url = 'https://search.yahoo.com/'
search_url = 'search?{query}&b={offset}&fl=1&vl=lang_{lang}'
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search_url_with_time = 'search?{query}&b={offset}&fl=1&vl=lang_{lang}&age={age}&btf={btf}&fr2=time'
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supported_languages_url = 'https://search.yahoo.com/web/advanced'
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# specific xpath variables
results_xpath = "//div[contains(concat(' ', normalize-space(@class), ' '), ' Sr ')]"
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url_xpath = './/h3/a/@href'
title_xpath = './/h3/a'
content_xpath = './/div[contains(@class, "compText")]'
suggestion_xpath = "//div[contains(concat(' ', normalize-space(@class), ' '), ' AlsoTry ')]//a"
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time_range_dict = {'day': ['1d', 'd'],
'week': ['1w', 'w'],
'month': ['1m', 'm']}
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language_aliases = {'zh-CN': 'zh-CHS', 'zh-TW': 'zh-CHT', 'zh-HK': 'zh-CHT'}
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# remove yahoo-specific tracking-url
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def parse_url(url_string):
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endings = ['/RS', '/RK']
endpositions = []
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start = url_string.find('http', url_string.find('/RU=') + 1)
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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])
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def _get_url(query, offset, language, time_range):
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if time_range in time_range_dict:
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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'
language = match_language(params['language'], supported_languages, language_aliases)
if language not in language_aliases.values():
language = language.split('-')[0]
language = language.replace('-', '_').lower()
return language
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# do search-request
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def request(query, params):
if params['time_range'] and params['time_range'] not in time_range_dict:
return params
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offset = (params['pageno'] - 1) * 10 + 1
language = _get_language(params)
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params['url'] = _get_url(query, offset, language, params['time_range'])
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# TODO required?
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params['cookies']['sB'] = 'fl=1&vl=lang_{lang}&sh=1&rw=new&v=1'\
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.format(lang=language)
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return params
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# get response from search-request
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def response(resp):
results = []
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dom = html.fromstring(resp.text)
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try:
results_num = int(eval_xpath(dom, '//div[@class="compPagination"]/span[last()]/text()')[0]
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.split()[0].replace(',', ''))
results.append({'number_of_results': results_num})
except:
pass
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# parse results
for result in eval_xpath(dom, results_xpath):
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try:
url = parse_url(extract_url(eval_xpath(result, url_xpath), search_url))
title = extract_text(eval_xpath(result, title_xpath)[0])
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except:
continue
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content = extract_text(eval_xpath(result, content_xpath)[0])
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# append result
results.append({'url': url,
'title': title,
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'content': content})
# if no suggestion found, return results
suggestions = eval_xpath(dom, suggestion_xpath)
if not suggestions:
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return results
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# parse suggestion
for suggestion in suggestions:
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# append suggestion
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results.append({'suggestion': extract_text(suggestion)})
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# return results
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return results
# get supported languages from their site
def _fetch_supported_languages(resp):
supported_languages = []
dom = html.fromstring(resp.text)
options = eval_xpath(dom, '//div[@id="yschlang"]/span/label/input')
for option in options:
code_parts = eval_xpath(option, './@value')[0][5:].split('_')
if len(code_parts) == 2:
code = code_parts[0] + '-' + code_parts[1].upper()
else:
code = code_parts[0]
supported_languages.append(code)
return supported_languages