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[fix] engine - Crossref

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Crossref was broken on result types journal-issue and component .. The old code
had lots of assumptions, and broke during parsing.  Now the assumptions are more
explicit and checked them with the API.
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jazzzooo 2023-09-13 16:21:10 +00:00 committed by Markus Heiser
parent ed6a5a01bb
commit 74600c028d
1 changed files with 43 additions and 39 deletions
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searx/engines/crossref.py
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@ -1,60 +1,64 @@
# SPDX-License-Identifier: AGPL-3.0-or-later # SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint # lint: pylint
"""Semantic Scholar (Science) """CrossRef"""
"""
# pylint: disable=use-dict-literal
from urllib.parse import urlencode from urllib.parse import urlencode
from searx.utils import html_to_text from datetime import datetime
about = { about = {
"website": 'https://www.crossref.org/', "website": "https://www.crossref.org/",
"wikidata_id": 'Q5188229', "wikidata_id": "Q5188229",
"official_api_documentation": 'https://github.com/CrossRef/rest-api-doc', "official_api_documentation": "https://api.crossref.org",
"use_official_api": False, "use_official_api": False,
"require_api_key": False, "require_api_key": False,
"results": 'JSON', "results": "JSON",
} }
categories = ['science', 'scientific publications'] categories = ["science", "scientific publications"]
paging = True paging = True
search_url = 'https://api.crossref.org/works' search_url = "https://api.crossref.org/works"
def request(query, params): def request(query, params):
params['url'] = search_url + '?' + urlencode(dict(query=query, offset=20 * (params['pageno'] - 1))) params["url"] = search_url + "?" + urlencode({"query": query, "offset": 20 * (params["pageno"] - 1)})
return params return params
def response(resp): def response(resp):
res = resp.json()
results = [] results = []
for record in res['message']['items']: for record in resp.json()["message"]["items"]:
record_type = record['type']
if record_type == 'book-chapter': if record["type"] == "component":
title = record['container-title'][0] # These seem to be files published along with papers. Not something you'd search for
if record['title'][0].lower().strip() != title.lower().strip(): continue
title = html_to_text(title) + ' (' + html_to_text(record['title'][0]) + ')' result = {
journal = None "template": "paper.html",
"content": record.get("abstract", ""),
"doi": record.get("DOI"),
"pages": record.get("page"),
"publisher": record.get("publisher"),
"tags": record.get("subject"),
"type": record.get("type"),
"url": record.get("URL"),
"volume": record.get("volume"),
}
if record["type"] == "book-chapter":
result["title"] = record["container-title"][0]
if record["title"][0].lower().strip() != result["title"].lower().strip():
result["title"] += f" ({record['title'][0]})"
else: else:
title = html_to_text(record['title'][0]) result["title"] = record["title"][0] if "title" in record else record.get("container-title", [None])[0]
journal = record.get('container-title', [None])[0] result["journal"] = record.get("container-title", [None])[0] if "title" in record else None
url = record.get('resource', {}).get('primary', {}).get('URL') or record['URL']
authors = [author.get('given', '') + ' ' + author.get('family', '') for author in record.get('author', [])] if "resource" in record and "primary" in record["resource"] and "URL" in record["resource"]["primary"]:
isbn = record.get('isbn') or [i['value'] for i in record.get('isbn-type', [])] result["url"] = record["resource"]["primary"]["URL"]
results.append( if "published" in record and "date-parts" in record["published"]:
{ result["publishedDate"] = datetime(*(record["published"]["date-parts"][0] + [1, 1][:3]))
'template': 'paper.html', result["authors"] = [a.get("given", "") + " " + a.get("family", "") for a in record.get("author", [])]
'url': url, result["isbn"] = record.get("isbn") or [i["value"] for i in record.get("isbn-type", [])]
'title': title, # All the links are not PDFs, even if the URL ends with ".pdf"
'journal': journal, # result["pdf_url"] = record.get("link", [{"URL": None}])[0]["URL"]
'volume': record.get('volume'),
'type': record['type'], results.append(result)
'content': html_to_text(record.get('abstract', '')),
'publisher': record.get('publisher'),
'authors': authors,
'doi': record['DOI'],
'isbn': isbn,
}
)
return results return results