mirror of
https://github.com/searxng/searxng.git
synced 2024-12-26 19:20:29 +00:00
[enh] google scholar - python implementation of the engine
The old xpath configuration for google scholar did not work and is replaced by a python implementation. Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
This commit is contained in:
Markus Heiser
parent
e2fb500892
commit
d48e2e7b0b
4 changed files with 300 additions and 19 deletions
3
Makefile
3
Makefile
|
|
@ -195,7 +195,8 @@ PYLINT_FILES=\
|
|||
searx/engines/google_videos.py \
|
||||
searx/engines/google_images.py \
|
||||
searx/engines/mediathekviewweb.py \
|
||||
utils/fetch_external_bangs.py
|
||||
utils/fetch_external_bangs.py \
|
||||
searx/engines/google_scholar.py
|
||||
|
||||
test.pylint: pyenvinstall
|
||||
$(call cmd,pylint,$(PYLINT_FILES))
|
||||
|
|
|
|||
|
|
@ -25176,6 +25176,146 @@
|
|||
"name": "\u4e2d\u6587 (\u7e41\u9ad4)"
|
||||
}
|
||||
},
|
||||
"google scholar": {
|
||||
"af": {
|
||||
"name": "Afrikaans"
|
||||
},
|
||||
"ar": {
|
||||
"name": "\u0627\u0644\u0639\u0631\u0628\u064a\u0629"
|
||||
},
|
||||
"be": {
|
||||
"name": "\u0431\u0435\u043b\u0430\u0440\u0443\u0441\u043a\u0430\u044f"
|
||||
},
|
||||
"bg": {
|
||||
"name": "\u0431\u044a\u043b\u0433\u0430\u0440\u0441\u043a\u0438"
|
||||
},
|
||||
"ca": {
|
||||
"name": "catal\u00e0"
|
||||
},
|
||||
"cs": {
|
||||
"name": "\u010de\u0161tina"
|
||||
},
|
||||
"da": {
|
||||
"name": "dansk"
|
||||
},
|
||||
"de": {
|
||||
"name": "Deutsch"
|
||||
},
|
||||
"el": {
|
||||
"name": "\u0395\u03bb\u03bb\u03b7\u03bd\u03b9\u03ba\u03ac"
|
||||
},
|
||||
"en": {
|
||||
"name": "English"
|
||||
},
|
||||
"eo": {
|
||||
"name": "esperanto"
|
||||
},
|
||||
"es": {
|
||||
"name": "espa\u00f1ol"
|
||||
},
|
||||
"et": {
|
||||
"name": "eesti"
|
||||
},
|
||||
"fa": {
|
||||
"name": "\u0641\u0627\u0631\u0633\u06cc"
|
||||
},
|
||||
"fi": {
|
||||
"name": "suomi"
|
||||
},
|
||||
"fr": {
|
||||
"name": "fran\u00e7ais"
|
||||
},
|
||||
"hi": {
|
||||
"name": "\u0939\u093f\u0928\u094d\u0926\u0940"
|
||||
},
|
||||
"hr": {
|
||||
"name": "hrvatski"
|
||||
},
|
||||
"hu": {
|
||||
"name": "magyar"
|
||||
},
|
||||
"hy": {
|
||||
"name": "\u0570\u0561\u0575\u0565\u0580\u0565\u0576"
|
||||
},
|
||||
"id": {
|
||||
"name": "Indonesia"
|
||||
},
|
||||
"is": {
|
||||
"name": "\u00edslenska"
|
||||
},
|
||||
"it": {
|
||||
"name": "italiano"
|
||||
},
|
||||
"iw": {
|
||||
"name": "\u05e2\u05d1\u05e8\u05d9\u05ea"
|
||||
},
|
||||
"ja": {
|
||||
"name": "\u65e5\u672c\u8a9e"
|
||||
},
|
||||
"ko": {
|
||||
"name": "\ud55c\uad6d\uc5b4"
|
||||
},
|
||||
"lt": {
|
||||
"name": "lietuvi\u0173"
|
||||
},
|
||||
"lv": {
|
||||
"name": "latvie\u0161u"
|
||||
},
|
||||
"nl": {
|
||||
"name": "Nederlands"
|
||||
},
|
||||
"no": {
|
||||
"name": "norsk"
|
||||
},
|
||||
"pl": {
|
||||
"name": "polski"
|
||||
},
|
||||
"pt": {
|
||||
"name": "portugu\u00eas"
|
||||
},
|
||||
"ro": {
|
||||
"name": "rom\u00e2n\u0103"
|
||||
},
|
||||
"ru": {
|
||||
"name": "\u0440\u0443\u0441\u0441\u043a\u0438\u0439"
|
||||
},
|
||||
"sk": {
|
||||
"name": "sloven\u010dina"
|
||||
},
|
||||
"sl": {
|
||||
"name": "sloven\u0161\u010dina"
|
||||
},
|
||||
"sr": {
|
||||
"name": "\u0441\u0440\u043f\u0441\u043a\u0438"
|
||||
},
|
||||
"sv": {
|
||||
"name": "svenska"
|
||||
},
|
||||
"sw": {
|
||||
"name": "Kiswahili"
|
||||
},
|
||||
"th": {
|
||||
"name": "\u0e44\u0e17\u0e22"
|
||||
},
|
||||
"tl": {
|
||||
"name": "Filipino"
|
||||
},
|
||||
"tr": {
|
||||
"name": "T\u00fcrk\u00e7e"
|
||||
},
|
||||
"uk": {
|
||||
"name": "\u0443\u043a\u0440\u0430\u0457\u043d\u0441\u044c\u043a\u0430"
|
||||
},
|
||||
"vi": {
|
||||
"name": "Ti\u1ebfng Vi\u1ec7t"
|
||||
},
|
||||
"zh-CN": {
|
||||
"name": "\u4e2d\u6587 (\u7b80\u4f53)"
|
||||
},
|
||||
"zh-TW": {
|
||||
"name": "\u4e2d\u6587 (\u7e41\u9ad4)"
|
||||
}
|
||||
},
|
||||
"google videos": {
|
||||
"af": {
|
||||
"name": "Afrikaans"
|
||||
|
|
|
|||
157
searx/engines/google_scholar.py
Normal file
157
searx/engines/google_scholar.py
Normal file
|
|
@ -0,0 +1,157 @@
|
|||
# SPDX-License-Identifier: AGPL-3.0-or-later
|
||||
"""Google (Scholar)
|
||||
|
||||
For detailed description of the *REST-full* API see: `Query Parameter
|
||||
Definitions`_.
|
||||
|
||||
.. _Query Parameter Definitions:
|
||||
https://developers.google.com/custom-search/docs/xml_results#WebSearch_Query_Parameter_Definitions
|
||||
"""
|
||||
|
||||
# pylint: disable=invalid-name, missing-function-docstring
|
||||
|
||||
from urllib.parse import urlencode
|
||||
from datetime import datetime
|
||||
from lxml import html
|
||||
from searx import logger
|
||||
|
||||
from searx.utils import (
|
||||
eval_xpath,
|
||||
eval_xpath_list,
|
||||
extract_text,
|
||||
)
|
||||
|
||||
from searx.engines.google import (
|
||||
get_lang_info,
|
||||
time_range_dict,
|
||||
detect_google_sorry,
|
||||
)
|
||||
|
||||
# pylint: disable=unused-import
|
||||
from searx.engines.google import (
|
||||
supported_languages_url,
|
||||
_fetch_supported_languages,
|
||||
)
|
||||
# pylint: enable=unused-import
|
||||
|
||||
# about
|
||||
about = {
|
||||
"website": 'https://scholar.google.com',
|
||||
"wikidata_id": 'Q494817',
|
||||
"official_api_documentation": 'https://developers.google.com/custom-search',
|
||||
"use_official_api": False,
|
||||
"require_api_key": False,
|
||||
"results": 'HTML',
|
||||
}
|
||||
|
||||
# engine dependent config
|
||||
categories = ['science']
|
||||
paging = True
|
||||
language_support = True
|
||||
use_locale_domain = True
|
||||
time_range_support = True
|
||||
safesearch = False
|
||||
|
||||
logger = logger.getChild('google scholar')
|
||||
|
||||
def time_range_url(params):
|
||||
"""Returns a URL query component for a google-Scholar time range based on
|
||||
``params['time_range']``. Google-Scholar does only support ranges in years.
|
||||
To have any effect, all the Searx ranges (*day*, *week*, *month*, *year*)
|
||||
are mapped to *year*. If no range is set, an empty string is returned.
|
||||
Example::
|
||||
|
||||
&as_ylo=2019
|
||||
"""
|
||||
# as_ylo=2016&as_yhi=2019
|
||||
ret_val = ''
|
||||
if params['time_range'] in time_range_dict:
|
||||
ret_val= urlencode({'as_ylo': datetime.now().year -1 })
|
||||
return '&' + ret_val
|
||||
|
||||
|
||||
def request(query, params):
|
||||
"""Google-Scholar search request"""
|
||||
|
||||
offset = (params['pageno'] - 1) * 10
|
||||
lang_info = get_lang_info(
|
||||
# pylint: disable=undefined-variable
|
||||
|
||||
|
||||
# params, {}, language_aliases
|
||||
|
||||
params, supported_languages, language_aliases
|
||||
)
|
||||
# subdomain is: scholar.google.xy
|
||||
lang_info['subdomain'] = lang_info['subdomain'].replace("www.", "scholar.")
|
||||
|
||||
query_url = 'https://'+ lang_info['subdomain'] + '/scholar' + "?" + urlencode({
|
||||
'q': query,
|
||||
'hl': lang_info['hl'],
|
||||
'lr': lang_info['lr'],
|
||||
'ie': "utf8",
|
||||
'oe': "utf8",
|
||||
'start' : offset,
|
||||
})
|
||||
|
||||
query_url += time_range_url(params)
|
||||
|
||||
logger.debug("query_url --> %s", query_url)
|
||||
params['url'] = query_url
|
||||
|
||||
logger.debug("HTTP header Accept-Language --> %s", lang_info['Accept-Language'])
|
||||
params['headers']['Accept-Language'] = lang_info['Accept-Language']
|
||||
params['headers']['Accept'] = (
|
||||
'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8'
|
||||
)
|
||||
|
||||
#params['google_subdomain'] = subdomain
|
||||
return params
|
||||
|
||||
def response(resp):
|
||||
"""Get response from google's search request"""
|
||||
results = []
|
||||
|
||||
detect_google_sorry(resp)
|
||||
|
||||
# which subdomain ?
|
||||
# subdomain = resp.search_params.get('google_subdomain')
|
||||
|
||||
# convert the text to dom
|
||||
dom = html.fromstring(resp.text)
|
||||
|
||||
# parse results
|
||||
for result in eval_xpath_list(dom, '//div[@class="gs_ri"]'):
|
||||
|
||||
title = extract_text(eval_xpath(result, './h3[1]//a'))
|
||||
|
||||
if not title:
|
||||
# this is a [ZITATION] block
|
||||
continue
|
||||
|
||||
url = eval_xpath(result, './h3[1]//a/@href')[0]
|
||||
content = extract_text(eval_xpath(result, './div[@class="gs_rs"]')) or ''
|
||||
|
||||
pub_info = extract_text(eval_xpath(result, './div[@class="gs_a"]'))
|
||||
if pub_info:
|
||||
content += "[%s]" % pub_info
|
||||
|
||||
pub_type = extract_text(eval_xpath(result, './/span[@class="gs_ct1"]'))
|
||||
if pub_type:
|
||||
title = title + " " + pub_type
|
||||
|
||||
results.append({
|
||||
'url': url,
|
||||
'title': title,
|
||||
'content': content,
|
||||
})
|
||||
|
||||
# parse suggestion
|
||||
for suggestion in eval_xpath(dom, '//div[contains(@class, "gs_qsuggest_wrap")]//li//a'):
|
||||
# append suggestion
|
||||
results.append({'suggestion': extract_text(suggestion)})
|
||||
|
||||
for correction in eval_xpath(dom, '//div[@class="gs_r gs_pda"]/a'):
|
||||
results.append({'correction': extract_text(correction)})
|
||||
|
||||
return results
|
||||
|
|
@ -535,25 +535,8 @@ engines:
|
|||
# android: *test_android
|
||||
|
||||
- name : google scholar
|
||||
engine : xpath
|
||||
paging : True
|
||||
search_url : https://scholar.google.com/scholar?start={pageno}&q={query}&hl=en&as_sdt=0,5&as_vis=1
|
||||
results_xpath : //div[contains(@class, "gs_r")]/div[@class="gs_ri"]
|
||||
url_xpath : .//h3/a/@href
|
||||
title_xpath : .//h3/a
|
||||
content_xpath : .//div[@class="gs_rs"]
|
||||
suggestion_xpath : //div[@id="gs_res_ccl_top"]//a/b
|
||||
page_size : 10
|
||||
first_page_num : 0
|
||||
categories : science
|
||||
engine : google_scholar
|
||||
shortcut : gos
|
||||
about:
|
||||
website: https://scholar.google.com/
|
||||
wikidata_id: Q494817
|
||||
official_api_documentation:
|
||||
use_official_api: false
|
||||
require_api_key: false
|
||||
results: HTML
|
||||
|
||||
- name : google play apps
|
||||
engine : xpath
|
||||
|
|
|
|||
Loading…
Reference in a new issue