mirror of
https://github.com/searxng/searxng.git
synced 2025-10-31 10:37:06 -04:00
590b211652
Fixes the semantic scholar engine by extracting a ui version token. BTW: remove html tags from the content. Author's checklist: - they are ratelimiting very fast, if you do approx more than 2 requests per minute, you have to wait some time again... - they also have an official api at api.semanticscholar.org, but it's ratelimits are even harder Closes: https://github.com/searxng/searxng/issues/4685
125 lines
3.9 KiB
Python
125 lines
3.9 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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"""Semantic Scholar (Science)"""
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from json import dumps
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from datetime import datetime
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from lxml import html
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from flask_babel import gettext
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from searx.network import get
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from searx.utils import eval_xpath_getindex, gen_useragent, html_to_text
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about = {
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"website": 'https://www.semanticscholar.org/',
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"wikidata_id": 'Q22908627',
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"official_api_documentation": 'https://api.semanticscholar.org/',
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"use_official_api": True,
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"require_api_key": False,
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"results": 'JSON',
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}
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categories = ['science', 'scientific publications']
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paging = True
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search_url = 'https://www.semanticscholar.org/api/1/search'
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base_url = 'https://www.semanticscholar.org'
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def _get_ui_version():
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resp = get(base_url)
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if not resp.ok:
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raise RuntimeError("Can't determine Semantic Scholar UI version")
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doc = html.fromstring(resp.text)
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ui_version = eval_xpath_getindex(doc, "//meta[@name='s2-ui-version']/@content", 0)
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if not ui_version:
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raise RuntimeError("Can't determine Semantic Scholar UI version")
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return ui_version
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def request(query, params):
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params['url'] = search_url
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params['method'] = 'POST'
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params['headers'] = {
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'Content-Type': 'application/json',
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'X-S2-UI-Version': _get_ui_version(),
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'X-S2-Client': "webapp-browser",
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'User-Agent': gen_useragent(),
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}
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params['data'] = dumps(
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{
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"queryString": query,
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"page": params['pageno'],
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"pageSize": 10,
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"sort": "relevance",
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"getQuerySuggestions": False,
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"authors": [],
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"coAuthors": [],
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"venues": [],
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"performTitleMatch": True,
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}
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)
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return params
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def response(resp):
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res = resp.json()
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results = []
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for result in res['results']:
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url = result.get('primaryPaperLink', {}).get('url')
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if not url and result.get('links'):
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url = result.get('links')[0]
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if not url:
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alternatePaperLinks = result.get('alternatePaperLinks')
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if alternatePaperLinks:
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url = alternatePaperLinks[0].get('url')
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if not url:
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url = base_url + '/paper/%s' % result['id']
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# publishedDate
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if 'pubDate' in result:
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publishedDate = datetime.strptime(result['pubDate'], "%Y-%m-%d")
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else:
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publishedDate = None
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# authors
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authors = [author[0]['name'] for author in result.get('authors', [])]
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# pick for the first alternate link, but not from the crawler
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pdf_url = None
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for doc in result.get('alternatePaperLinks', []):
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if doc['linkType'] not in ('crawler', 'doi'):
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pdf_url = doc['url']
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break
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# comments
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comments = None
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if 'citationStats' in result:
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comments = gettext(
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'{numCitations} citations from the year {firstCitationVelocityYear} to {lastCitationVelocityYear}'
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).format(
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numCitations=result['citationStats']['numCitations'],
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firstCitationVelocityYear=result['citationStats']['firstCitationVelocityYear'],
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lastCitationVelocityYear=result['citationStats']['lastCitationVelocityYear'],
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)
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results.append(
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{
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'template': 'paper.html',
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'url': url,
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'title': result['title']['text'],
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'content': html_to_text(result['paperAbstract']['text']),
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'journal': result.get('venue', {}).get('text') or result.get('journal', {}).get('name'),
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'doi': result.get('doiInfo', {}).get('doi'),
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'tags': result.get('fieldsOfStudy'),
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'authors': authors,
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'pdf_url': pdf_url,
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'publishedDate': publishedDate,
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'comments': comments,
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}
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)
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return results
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