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"""
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Yahoo (Web)
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@website https://search.yahoo.com/web
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@provide-api yes (https://developer.yahoo.com/boss/search/),
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$0.80/1000 queries
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@using-api no (because pricing)
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@results HTML (using search portal)
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@stable no (HTML can change)
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@parse url, title, content, suggestion
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"""
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from lxml import html
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from searx.engines.xpath import extract_text, extract_url
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from searx.url_utils import unquote, urlencode
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from searx.utils import match_language
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# engine dependent config
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categories = ['general']
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paging = True
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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/'
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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
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results_xpath = "//div[contains(concat(' ', normalize-space(@class), ' '), ' Sr ')]"
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url_xpath = './/h3/a/@href'
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title_xpath = './/h3/a'
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content_xpath = './/div[@class="compText aAbs"]'
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suggestion_xpath = "//div[contains(concat(' ', normalize-space(@class), ' '), ' AlsoTry ')]//a"
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time_range_dict = {'day': ['1d', 'd'],
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'week': ['1w', 'w'],
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'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']
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endpositions = []
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start = url_string.find('http', url_string.find('/RU=') + 1)
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for ending in endings:
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endpos = url_string.rfind(ending)
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if endpos > -1:
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endpositions.append(endpos)
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if start == 0 or len(endpositions) == 0:
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return url_string
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else:
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end = min(endpositions)
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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,
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query=urlencode({'p': query}),
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lang=language,
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age=time_range_dict[time_range][0],
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btf=time_range_dict[time_range][1])
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return base_url + search_url.format(offset=offset,
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query=urlencode({'p': query}),
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lang=language)
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def _get_language(params):
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if params['language'] == 'all':
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return 'en'
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language = match_language(params['language'], supported_languages, language_aliases)
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if language not in language_aliases.values():
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language = language.split('-')[0]
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language = language.replace('-', '_').lower()
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return language
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# do search-request
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def request(query, params):
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if params['time_range'] and params['time_range'] not in time_range_dict:
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return params
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offset = (params['pageno'] - 1) * 10 + 1
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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):
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results = []
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dom = html.fromstring(resp.text)
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try:
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results_num = int(dom.xpath('//div[@class="compPagination"]/span[last()]/text()')[0]
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.split()[0].replace(',', ''))
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results.append({'number_of_results': results_num})
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except:
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pass
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# parse results
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for result in dom.xpath(results_xpath):
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try:
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url = parse_url(extract_url(result.xpath(url_xpath), search_url))
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title = extract_text(result.xpath(title_xpath)[0])
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except:
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continue
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content = extract_text(result.xpath(content_xpath)[0])
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# append result
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results.append({'url': url,
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'title': title,
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'content': content})
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# if no suggestion found, return results
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suggestions = dom.xpath(suggestion_xpath)
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if not suggestions:
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return results
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# parse suggestion
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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
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# get supported languages from their site
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def _fetch_supported_languages(resp):
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supported_languages = []
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dom = html.fromstring(resp.text)
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options = dom.xpath('//div[@id="yschlang"]/span/label/input')
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for option in options:
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code_parts = option.xpath('./@value')[0][5:].split('_')
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if len(code_parts) == 2:
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code = code_parts[0] + '-' + code_parts[1].upper()
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else:
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code = code_parts[0]
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supported_languages.append(code)
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return supported_languages
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