Merge pull request #1705 from dalf/template_paper

Theme: add a paper.html template and update of the science engines

docs/dev/engine_overview.rst

@@ -311,3 +311,88 @@ the parameter ``template`` must be set to the desired type.
    address.postcode          postcode of object
    address.country           country of object
    ========================= =====================================================
+
+.. _BibTeX format: https://www.bibtex.com/g/bibtex-format/
+.. _BibTeX field types: https://en.wikipedia.org/wiki/BibTeX#Field_types
+
+.. list-table:: Parameter of the **paper** media type /
+                see `BibTeX field types`_ and `BibTeX format`_
+   :header-rows: 2
+   :width: 100%
+
+   * - result-parameter
+     - Python type
+     - information
+
+   * - template
+     - :py:class:`str`
+     - is set to ``paper.html``
+
+   * - title
+     - :py:class:`str`
+     - title of the result
+
+   * - content
+     - :py:class:`str`
+     - abstract
+
+   * - comments
+     - :py:class:`str`
+     - free text display in italic below the content
+
+   * - tags
+     - :py:class:`List <list>`\ [\ :py:class:`str`\ ]
+     - free tag list
+
+   * - publishedDate
+     - :py:class:`datetime <datetime.datetime>`
+     - last publication date
+
+   * - authors
+     - :py:class:`List <list>`\ [\ :py:class:`str`\ ]
+     - list of authors of the work (authors with a "s")
+
+   * - editor
+     - :py:class:`str`
+     - list of editors of a book
+
+   * - publisher
+     - :py:class:`str`
+     - name of the publisher
+
+   * - journal
+     - :py:class:`str`
+     - name of the journal or magazine the article was
+       published in
+
+   * - volume
+     - :py:class:`str`
+     - volume number
+
+   * - pages
+     - :py:class:`str`
+     - page range where the article is
+
+   * - number
+     - :py:class:`str`
+     - number of the report or the issue number for a journal article
+
+   * - doi
+     - :py:class:`str`
+     - DOI number (like ``10.1038/d41586-018-07848-2``)
+
+   * - issn
+     - :py:class:`str`
+     - ISSN number like ``1476-4687``
+
+   * - isbn
+     - :py:class:`str`
+     - ISBN number like ``9780201896831``
+
+   * - pdf_url
+     - :py:class:`str`
+     - URL to the full article, the PDF version
+
+   * - html_url
+     - :py:class:`str`
+     - URL to full article, HTML version

searx/engines/arxiv.py

@@ -3,9 +3,10 @@
  ArXiV (Scientific preprints)
 """
 
-from lxml import html
+from lxml import etree
+from lxml.etree import XPath
 from datetime import datetime
-from searx.utils import eval_xpath_list, eval_xpath_getindex
+from searx.utils import eval_xpath, eval_xpath_list, eval_xpath_getindex
 
 # about
 about = {
@@ -17,7 +18,7 @@ about = {
     "results": 'XML-RSS',
 }
 
-categories = ['science']
+categories = ['science', 'scientific publications']
 paging = True
 
 base_url = (
@@ -27,6 +28,23 @@ base_url = (
 # engine dependent config
 number_of_results = 10
 
+# xpaths
+arxiv_namespaces = {
+    "atom": "http://www.w3.org/2005/Atom",
+    "arxiv": "http://arxiv.org/schemas/atom",
+}
+xpath_entry = XPath('//atom:entry', namespaces=arxiv_namespaces)
+xpath_title = XPath('.//atom:title', namespaces=arxiv_namespaces)
+xpath_id = XPath('.//atom:id', namespaces=arxiv_namespaces)
+xpath_summary = XPath('.//atom:summary', namespaces=arxiv_namespaces)
+xpath_author_name = XPath('.//atom:author/atom:name', namespaces=arxiv_namespaces)
+xpath_doi = XPath('.//arxiv:doi', namespaces=arxiv_namespaces)
+xpath_pdf = XPath('.//atom:link[@title="pdf"]', namespaces=arxiv_namespaces)
+xpath_published = XPath('.//atom:published', namespaces=arxiv_namespaces)
+xpath_journal = XPath('.//arxiv:journal_ref', namespaces=arxiv_namespaces)
+xpath_category = XPath('.//atom:category/@term', namespaces=arxiv_namespaces)
+xpath_comment = XPath('./arxiv:comment', namespaces=arxiv_namespaces)
+
 
 def request(query, params):
     # basic search
@@ -41,30 +59,50 @@ def request(query, params):
 
 def response(resp):
     results = []
+    dom = etree.fromstring(resp.content)
+    for entry in eval_xpath_list(dom, xpath_entry):
+        title = eval_xpath_getindex(entry, xpath_title, 0).text
 
-    dom = html.fromstring(resp.content)
+        url = eval_xpath_getindex(entry, xpath_id, 0).text
+        abstract = eval_xpath_getindex(entry, xpath_summary, 0).text
 
-    for entry in eval_xpath_list(dom, '//entry'):
-        title = eval_xpath_getindex(entry, './/title', 0).text
+        authors = [author.text for author in eval_xpath_list(entry, xpath_author_name)]
 
-        url = eval_xpath_getindex(entry, './/id', 0).text
+        #  doi
+        doi_element = eval_xpath_getindex(entry, xpath_doi, 0, default=None)
+        doi = None if doi_element is None else doi_element.text
 
-        content_string = '{doi_content}{abstract_content}'
+        # pdf
+        pdf_element = eval_xpath_getindex(entry, xpath_pdf, 0, default=None)
+        pdf_url = None if pdf_element is None else pdf_element.attrib.get('href')
 
-        abstract = eval_xpath_getindex(entry, './/summary', 0).text
+        # journal
+        journal_element = eval_xpath_getindex(entry, xpath_journal, 0, default=None)
+        journal = None if journal_element is None else journal_element.text
 
-        #  If a doi is available, add it to the snipppet
-        doi_element = eval_xpath_getindex(entry, './/link[@title="doi"]', 0, default=None)
-        doi_content = doi_element.text if doi_element is not None else ''
-        content = content_string.format(doi_content=doi_content, abstract_content=abstract)
+        # tags
+        tag_elements = eval_xpath(entry, xpath_category)
+        tags = [str(tag) for tag in tag_elements]
 
-        if len(content) > 300:
-            content = content[0:300] + "..."
-        # TODO: center snippet on query term
+        # comments
+        comments_elements = eval_xpath_getindex(entry, xpath_comment, 0, default=None)
+        comments = None if comments_elements is None else comments_elements.text
 
-        publishedDate = datetime.strptime(eval_xpath_getindex(entry, './/published', 0).text, '%Y-%m-%dT%H:%M:%SZ')
+        publishedDate = datetime.strptime(eval_xpath_getindex(entry, xpath_published, 0).text, '%Y-%m-%dT%H:%M:%SZ')
 
-        res_dict = {'url': url, 'title': title, 'publishedDate': publishedDate, 'content': content}
+        res_dict = {
+            'template': 'paper.html',
+            'url': url,
+            'title': title,
+            'publishedDate': publishedDate,
+            'content': abstract,
+            'doi': doi,
+            'authors': authors,
+            'journal': journal,
+            'tags': tags,
+            'comments': comments,
+            'pdf_url': pdf_url,
+        }
 
         results.append(res_dict)
 

searx/engines/crossref.py

@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+# lint: pylint
+"""Semantic Scholar (Science)
+"""
+
+from urllib.parse import urlencode
+from searx.utils import html_to_text
+
+about = {
+    "website": 'https://www.crossref.org/',
+    "wikidata_id": 'Q5188229',
+    "official_api_documentation": 'https://github.com/CrossRef/rest-api-doc',
+    "use_official_api": False,
+    "require_api_key": False,
+    "results": 'JSON',
+}
+
+categories = ['science', 'scientific publications']
+paging = True
+search_url = 'https://api.crossref.org/works'
+
+
+def request(query, params):
+    params['url'] = search_url + '?' + urlencode(dict(query=query, offset=20 * (params['pageno'] - 1)))
+    return params
+
+
+def response(resp):
+    res = resp.json()
+    results = []
+    for record in res['message']['items']:
+        record_type = record['type']
+        if record_type == 'book-chapter':
+            title = record['container-title'][0]
+            if record['title'][0].lower().strip() != title.lower().strip():
+                title = html_to_text(title) + ' (' + html_to_text(record['title'][0]) + ')'
+            journal = None
+        else:
+            title = html_to_text(record['title'][0])
+            journal = record.get('container-title', [None])[0]
+        url = record.get('resource', {}).get('primary', {}).get('URL') or record['URL']
+        authors = [author.get('given', '') + ' ' + author.get('family', '') for author in record.get('author', [])]
+        isbn = record.get('isbn') or [i['value'] for i in record.get('isbn-type', [])]
+        results.append(
+            {
+                'template': 'paper.html',
+                'url': url,
+                'title': title,
+                'journal': journal,
+                'volume': record.get('volume'),
+                'type': record['type'],
+                'content': html_to_text(record.get('abstract', '')),
+                'publisher': record.get('publisher'),
+                'authors': authors,
+                'doi': record['DOI'],
+                'isbn': isbn,
+            }
+        )
+    return results

searx/engines/google_scholar.py

@@ -13,10 +13,12 @@ Definitions`_.
 
 from urllib.parse import urlencode
 from datetime import datetime
+from typing import Optional
 from lxml import html
 
 from searx.utils import (
     eval_xpath,
+    eval_xpath_getindex,
     eval_xpath_list,
     extract_text,
 )
@@ -46,7 +48,7 @@ about = {
 }
 
 # engine dependent config
-categories = ['science']
+categories = ['science', 'scientific publications']
 paging = True
 language_support = True
 use_locale_domain = True
@@ -99,7 +101,43 @@ def request(query, params):
     return params
 
 
-def response(resp):
+def parse_gs_a(text: Optional[str]):
+    """Parse the text written in green.
+
+    Possible formats:
+    * "{authors} - {journal}, {year} - {publisher}"
+    * "{authors} - {year} - {publisher}"
+    * "{authors} - {publisher}"
+    """
+    if text is None or text == "":
+        return None, None, None, None
+
+    s_text = text.split(' - ')
+    authors = s_text[0].split(', ')
+    publisher = s_text[-1]
+    if len(s_text) != 3:
+        return authors, None, publisher, None
+
+    # the format is "{authors} - {journal}, {year} - {publisher}" or "{authors} - {year} - {publisher}"
+    # get journal and year
+    journal_year = s_text[1].split(', ')
+    # journal is optional and may contains some coma
+    if len(journal_year) > 1:
+        journal = ', '.join(journal_year[0:-1])
+        if journal == '…':
+            journal = None
+    else:
+        journal = None
+    # year
+    year = journal_year[-1]
+    try:
+        publishedDate = datetime.strptime(year.strip(), '%Y')
+    except ValueError:
+        publishedDate = None
+    return authors, journal, publisher, publishedDate
+
+
+def response(resp):  # pylint: disable=too-many-locals
     """Get response from google's search request"""
     results = []
 
@@ -112,30 +150,53 @@ def response(resp):
     dom = html.fromstring(resp.text)
 
     # parse results
-    for result in eval_xpath_list(dom, '//div[@class="gs_ri"]'):
+    for result in eval_xpath_list(dom, '//div[@data-cid]'):
 
-        title = extract_text(eval_xpath(result, './h3[1]//a'))
+        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
+            pub_type = pub_type[1:-1].lower()
+
+        url = eval_xpath_getindex(result, './/h3[1]//a/@href', 0)
+        content = extract_text(eval_xpath(result, './/div[@class="gs_rs"]'))
+        authors, journal, publisher, publishedDate = parse_gs_a(
+            extract_text(eval_xpath(result, './/div[@class="gs_a"]'))
+        )
+        if publisher in url:
+            publisher = None
+
+        # cited by
+        comments = extract_text(eval_xpath(result, './/div[@class="gs_fl"]/a[starts-with(@href,"/scholar?cites=")]'))
+
+        # link to the html or pdf document
+        html_url = None
+        pdf_url = None
+        doc_url = eval_xpath_getindex(result, './/div[@class="gs_or_ggsm"]/a/@href', 0, default=None)
+        doc_type = extract_text(eval_xpath(result, './/span[@class="gs_ctg2"]'))
+        if doc_type == "[PDF]":
+            pdf_url = doc_url
+        else:
+            html_url = doc_url
 
         results.append(
             {
+                'template': 'paper.html',
+                'type': pub_type,
                 'url': url,
                 'title': title,
+                'authors': authors,
+                'publisher': publisher,
+                'journal': journal,
+                'publishedDate': publishedDate,
                 'content': content,
+                'comments': comments,
+                'html_url': html_url,
+                'pdf_url': pdf_url,
             }
         )
 

searx/engines/pubmed.py

@@ -3,11 +3,15 @@
  PubMed (Scholar publications)
 """
 
-from flask_babel import gettext
 from lxml import etree
 from datetime import datetime
 from urllib.parse import urlencode
 from searx.network import get
+from searx.utils import (
+    eval_xpath_getindex,
+    eval_xpath_list,
+    extract_text,
+)
 
 # about
 about = {
@@ -22,7 +26,7 @@ about = {
     "results": 'XML',
 }
 
-categories = ['science']
+categories = ['science', 'scientific publications']
 
 base_url = (
     'https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi' + '?db=pubmed&{query}&retstart={offset}&retmax={hits}'
@@ -63,46 +67,61 @@ def response(resp):
 
     retrieve_url_encoded = pubmed_retrieve_api_url.format(**retrieve_notice_args)
 
-    search_results_xml = get(retrieve_url_encoded).content
-    search_results = etree.XML(search_results_xml).xpath('//PubmedArticleSet/PubmedArticle/MedlineCitation')
+    search_results_response = get(retrieve_url_encoded).content
+    search_results = etree.XML(search_results_response)
+    for entry in eval_xpath_list(search_results, '//PubmedArticle'):
+        medline = eval_xpath_getindex(entry, './MedlineCitation', 0)
 
-    for entry in search_results:
-        title = entry.xpath('.//Article/ArticleTitle')[0].text
-
-        pmid = entry.xpath('.//PMID')[0].text
+        title = eval_xpath_getindex(medline, './/Article/ArticleTitle', 0).text
+        pmid = eval_xpath_getindex(medline, './/PMID', 0).text
         url = pubmed_url + pmid
+        content = extract_text(
+            eval_xpath_getindex(medline, './/Abstract/AbstractText//text()', 0, default=None), allow_none=True
+        )
+        doi = extract_text(
+            eval_xpath_getindex(medline, './/ELocationID[@EIdType="doi"]/text()', 0, default=None), allow_none=True
+        )
+        journal = extract_text(
+            eval_xpath_getindex(medline, './Article/Journal/Title/text()', 0, default=None), allow_none=True
+        )
+        issn = extract_text(
+            eval_xpath_getindex(medline, './Article/Journal/ISSN/text()', 0, default=None), allow_none=True
+        )
+        authors = []
+        for author in eval_xpath_list(medline, './Article/AuthorList/Author'):
+            f = eval_xpath_getindex(author, './ForeName', 0, default=None)
+            l = eval_xpath_getindex(author, './LastName', 0, default=None)
+            f = '' if f is None else f.text
+            l = '' if l is None else l.text
+            authors.append((f + ' ' + l).strip())
 
-        try:
-            content = entry.xpath('.//Abstract/AbstractText')[0].text
-        except:
-            content = gettext('No abstract is available for this publication.')
+        res_dict = {
+            'template': 'paper.html',
+            'url': url,
+            'title': title,
+            'content': content,
+            'journal': journal,
+            'issn': [issn],
+            'authors': authors,
+            'doi': doi,
+        }
 
-        #  If a doi is available, add it to the snipppet
-        try:
-            doi = entry.xpath('.//ELocationID[@EIdType="doi"]')[0].text
-            content = 'DOI: {doi} Abstract: {content}'.format(doi=doi, content=content)
-        except:
-            pass
-
-        if len(content) > 300:
-            content = content[0:300] + "..."
-        # TODO: center snippet on query term
-
-        res_dict = {'url': url, 'title': title, 'content': content}
-
-        try:
-            publishedDate = datetime.strptime(
-                entry.xpath('.//DateCreated/Year')[0].text
-                + '-'
-                + entry.xpath('.//DateCreated/Month')[0].text
-                + '-'
-                + entry.xpath('.//DateCreated/Day')[0].text,
-                '%Y-%m-%d',
-            )
-            res_dict['publishedDate'] = publishedDate
-        except:
-            pass
+        accepted_date = eval_xpath_getindex(
+            entry, './PubmedData/History//PubMedPubDate[@PubStatus="accepted"]', 0, default=None
+        )
+        if accepted_date is not None:
+            year = eval_xpath_getindex(accepted_date, './Year', 0)
+            month = eval_xpath_getindex(accepted_date, './Month', 0)
+            day = eval_xpath_getindex(accepted_date, './Day', 0)
+            try:
+                publishedDate = datetime.strptime(
+                    year.text + '-' + month.text + '-' + day.text,
+                    '%Y-%m-%d',
+                )
+                res_dict['publishedDate'] = publishedDate
+            except Exception as e:
+                print(e)
 
         results.append(res_dict)
 
-        return results
+    return results

searx/engines/semantic_scholar.py

@@ -6,6 +6,8 @@
 from json import dumps, loads
 from datetime import datetime
 
+from flask_babel import gettext
+
 about = {
     "website": 'https://www.semanticscholar.org/',
     "wikidata_id": 'Q22908627',
@@ -15,6 +17,7 @@ about = {
     "results": 'JSON',
 }
 
+categories = ['science', 'scientific publications']
 paging = True
 search_url = 'https://www.semanticscholar.org/api/1/search'
 paper_url = 'https://www.semanticscholar.org/paper'
@@ -45,11 +48,7 @@ def request(query, params):
 def response(resp):
     res = loads(resp.text)
     results = []
-
     for result in res['results']:
-        item = {}
-        metadata = []
-
         url = result.get('primaryPaperLink', {}).get('url')
         if not url and result.get('links'):
             url = result.get('links')[0]
@@ -60,22 +59,47 @@ def response(resp):
         if not url:
             url = paper_url + '/%s' % result['id']
 
-        item['url'] = url
+        # publishedDate
+        if 'pubDate' in result:
+            publishedDate = datetime.strptime(result['pubDate'], "%Y-%m-%d")
+        else:
+            publishedDate = None
 
-        item['title'] = result['title']['text']
-        item['content'] = result['paperAbstract']['text']
+        # authors
+        authors = [author[0]['name'] for author in result.get('authors', [])]
 
-        metadata = result.get('fieldsOfStudy') or []
-        venue = result.get('venue', {}).get('text')
-        if venue:
-            metadata.append(venue)
-        if metadata:
-            item['metadata'] = ', '.join(metadata)
+        # pick for the first alternate link, but not from the crawler
+        pdf_url = None
+        for doc in result.get('alternatePaperLinks', []):
+            if doc['linkType'] not in ('crawler', 'doi'):
+                pdf_url = doc['url']
+                break
 
-        pubDate = result.get('pubDate')
-        if pubDate:
-            item['publishedDate'] = datetime.strptime(pubDate, "%Y-%m-%d")
+        # comments
+        comments = None
+        if 'citationStats' in result:
+            comments = gettext(
+                '{numCitations} citations from the year {firstCitationVelocityYear} to {lastCitationVelocityYear}'
+            ).format(
+                numCitations=result['citationStats']['numCitations'],
+                firstCitationVelocityYear=result['citationStats']['firstCitationVelocityYear'],
+                lastCitationVelocityYear=result['citationStats']['lastCitationVelocityYear'],
+            )
 
-        results.append(item)
+        results.append(
+            {
+                'template': 'paper.html',
+                'url': url,
+                'title': result['title']['text'],
+                'content': result['paperAbstract']['text'],
+                'journal': result.get('venue', {}).get('text') or result.get('journal', {}).get('name'),
+                'doi': result.get('doiInfo', {}).get('doi'),
+                'tags': result.get('fieldsOfStudy'),
+                'authors': authors,
+                'pdf_url': pdf_url,
+                'publishedDate': publishedDate,
+                'comments': comments,
+            }
+        )
 
     return results

searx/engines/springer.py

@@ -19,7 +19,7 @@ about = {
     "results": 'JSON',
 }
 
-categories = ['science']
+categories = ['science', 'scientific publications']
 paging = True
 nb_per_page = 10
 api_key = 'unset'
@@ -41,32 +41,29 @@ def response(resp):
     json_data = loads(resp.text)
 
     for record in json_data['records']:
-        content = record['abstract'][0:500]
-        if len(record['abstract']) > len(content):
-            content += "..."
+        content = record['abstract']
         published = datetime.strptime(record['publicationDate'], '%Y-%m-%d')
-
-        metadata = [
-            record[x]
-            for x in [
-                'publicationName',
-                'identifier',
-                'contentType',
-            ]
-            if record.get(x) is not None
-        ]
-
-        metadata = ' / '.join(metadata)
-        if record.get('startingPage') and record.get('endingPage') is not None:
-            metadata += " (%(startingPage)s-%(endingPage)s)" % record
-
+        authors = [" ".join(author['creator'].split(', ')[::-1]) for author in record['creators']]
+        tags = record.get('genre')
+        if isinstance(tags, str):
+            tags = [tags]
         results.append(
             {
+                'template': 'paper.html',
                 'title': record['title'],
                 'url': record['url'][0]['value'].replace('http://', 'https://', 1),
+                'type': record.get('contentType'),
                 'content': content,
                 'publishedDate': published,
-                'metadata': metadata,
+                'authors': authors,
+                'doi': record.get('doi'),
+                'journal': record.get('publicationName'),
+                'pages': record.get('start_page') + '-' + record.get('end_page'),
+                'tags': tags,
+                'issn': [record.get('issn')],
+                'isbn': [record.get('isbn')],
+                'volume': record.get('volume') or None,
+                'number': record.get('number') or None,
             }
         )
     return results

searx/plugins/oa_doi_rewrite.py

@@ -42,4 +42,6 @@ def on_result(request, search, result):
                 doi = doi[: -len(suffix)]
         result['url'] = get_doi_resolver(request.preferences) + doi
         result['parsed_url'] = urlparse(result['url'])
+        if 'doi' not in result:
+            result['doi'] = doi
     return True

searx/searxng.msg

@@ -43,6 +43,7 @@ CATEGORY_GROUPS = {
     'REPOS': 'repos',
     'SOFTWARE_WIKIS': 'software wikis',
     'WEB': 'web',
+    'SCIENTIFIC PUBLICATIONS': 'scientific publications',
 }
 
 STYLE_NAMES = {

searx/settings.yml

@@ -319,7 +319,6 @@ engines:
   - name: arxiv
     engine: arxiv
     shortcut: arx
-    categories: science
     timeout: 4.0
 
   # tmp suspended:  dh key too small
@@ -411,23 +410,10 @@ engines:
   #   api_key: 'unset'
 
   - name: crossref
-    engine: json_engine
-    paging: true
-    search_url: https://search.crossref.org/dois?q={query}&page={pageno}
-    url_query: doi
-    title_query: title
-    title_html_to_text: true
-    content_query: fullCitation
-    content_html_to_text: true
-    categories: science
+    engine: crossref
     shortcut: cr
-    about:
-      website: https://www.crossref.org/
-      wikidata_id: Q5188229
-      official_api_documentation: https://github.com/CrossRef/rest-api-doc
-      use_official_api: false
-      require_api_key: false
-      results: JSON
+    timeout: 30
+    disable: true
 
   - name: yep
     engine: json_engine
@@ -1068,7 +1054,7 @@ engines:
     title_query: metadata/oaf:entity/oaf:result/title/$
     content_query: metadata/oaf:entity/oaf:result/description/$
     content_html_to_text: true
-    categories: science
+    categories: "science"
     shortcut: oad
     timeout: 5.0
     about:
@@ -1198,7 +1184,6 @@ engines:
   - name: pubmed
     engine: pubmed
     shortcut: pub
-    categories: science
     timeout: 3.0
 
   - name: pypi
@@ -1346,7 +1331,6 @@ engines:
     engine: semantic_scholar
     disabled: true
     shortcut: se
-    categories: science
 
   # Spotify needs API credentials
   # - name: spotify
@@ -1372,8 +1356,7 @@ engines:
   #   # working API key, for test & debug: "a69685087d07eca9f13db62f65b8f601"
   #   api_key: 'unset'
   #   shortcut: springer
-  #   categories: science
-  #   timeout: 6.0
+  #   timeout: 15.0
 
   - name: startpage
     engine: startpage

searx/static/themes/simple/src/less/style.less

@@ -302,6 +302,49 @@ article[data-vim-selected].category-social {
   }
 }
 
+.result-paper {
+  .attributes {
+    display: table;
+    border-spacing: 0.125rem;
+
+    div {
+      display: table-row;
+
+      span {
+        font-size: 0.9rem;
+        margin-top: 0.25rem;
+        display: table-cell;
+
+        time {
+          font-size: 0.9rem;
+        }
+      }
+
+      span:first-child {
+        color: var(--color-base-font);
+        min-width: 10rem;
+      }
+
+      span:nth-child(2) {
+        color: var(--color-result-publishdate-font);
+      }
+    }
+  }
+
+  .content {
+    margin-top: 0.25rem;
+  }
+
+  .comments {
+    font-size: 0.9rem;
+    margin: 0.25rem 0 0 0;
+    padding: 0;
+    word-wrap: break-word;
+    line-height: 1.24;
+    font-style: italic;
+  }
+}
+
 .template_group_images {
   display: flex;
   flex-wrap: wrap;
@@ -955,6 +998,28 @@ article[data-vim-selected].category-social {
     border: none !important;
     background-color: var(--color-sidebar-background);
   }
+
+  .result-paper {
+    .attributes {
+      display: block;
+
+      div {
+        display: block;
+
+        span {
+          display: inline;
+        }
+
+        span:first-child {
+          font-weight: bold;
+        }
+
+        span:nth-child(2) {
+          .ltr-margin-left(0.5rem);
+        }
+      }
+    }
+  }
 }
 
 /*

searx/templates/simple/result_templates/paper.html

@@ -0,0 +1,44 @@
+{% from 'simple/macros.html' import result_header, result_sub_header, result_sub_footer, result_footer with context %}
+
+{{ result_header(result, favicons, image_proxify) -}}
+<div class="attributes">
+  {%- if result.publishedDate %}<div class="result_publishedDate"><span>{{ _("Published date") }}:</span><span><time class="published_date" datetime="{{ result.pubdate }}" >{{ result.publishedDate }}</time></span></div>{% endif -%}
+  {%- if result.authors %}<div class="result_authors"><span>{{ _("Author") }}:</span><span>{{ result.authors | join(", ") }}</span></div>{% endif -%}
+  {%- if result.journal -%}
+    <div class="result_journal">
+      <span>{{- _("Journal") }}:</span><span>{{ result.journal -}}
+      {%- if result.volume -%}
+        &nbsp;{{- result.volume -}}
+        {%- if result.number -%}
+          .{{- result.number -}}
+        {%- endif -%}
+      {%- endif -%}
+      {%- if result.pages -%}
+        &nbsp;{{- result.pages -}}
+      {%- endif -%}
+      </span>
+    </div>
+  {%- endif %}
+  {%- if result.editor %}<div class="result_editor"><span>{{ _("Editor") }}:</span><span>{{ result.editor }}</span></div>{% endif -%}
+  {%- if result.publisher %}<div class="result_publisher"><span>{{ _("Publisher") }}:</span><span>{{ result.publisher }}</span></div>{% endif -%}
+  {%- if result.type %}<div class="result_type"><span>{{ _("Type") }}:</span><span>{{ result.type }}</span></div>{% endif -%}
+  {%- if result.tags %}<div class="result_tags"><span>{{ _("Tags") }}:</span><span>{{ result.tags | join(", ")}}</span></div>{%- endif -%}
+  {%- if result.doi %}<div class="result_doi"><span>{{ _("DOI") }}:</span><span>{{- result.doi -}}</span></div>{% endif -%}
+  {%- if result.issn %}<div class="result_issn"><span>{{ _("ISSN") }}:</span><span>{{ result.issn | join(", ") }}</span></div>{% endif -%}
+  {%- if result.isbn %}<div class="result_isbn"><span>{{ _("ISBN") }}:</span><span>{{ result.isbn | join(", ") }}</span></div>{% endif -%}
+</div>
+{%- if result.content -%}<p class="content">{{- result.content | safe -}}</p>{%- endif -%}
+{%- if result.comments -%}<p class="comments">{{- result.comments -}}</p>{%- endif -%}
+<p class="altlink">
+  {%- if result.pdf_url -%}
+    <a href="{{ result.pdf_url }}" {% if results_on_new_tab %}target="_blank" rel="noopener noreferrer"{% else %}rel="noreferrer"{% endif %}>{{ _('PDF') }}</a>
+  {%- endif -%}
+  {%- if result.html_url -%}
+      <a href="{{ result.html_url }}" {% if results_on_new_tab %}target="_blank" rel="noopener noreferrer"{% else %}rel="noreferrer"{% endif %}>{{ _('HTML') }}</a>
+  {%- endif -%}
+  {%- if result.doi %}
+    <a href="https://www.altmetric.com/details/doi/{{result.doi}}" {% if results_on_new_tab %}target="_blank" rel="noopener noreferrer"{% else %}rel="noreferrer"{% endif %}>Altmetric</a>
+  {% endif -%}
+</p>
+{{- result_sub_footer(result, proxify) -}}
+{{- result_footer(result) }}

searx/webapp.py

@@ -12,7 +12,6 @@ import os
 import sys
 import base64
 
-from datetime import datetime, timedelta
 from timeit import default_timer
 from html import escape
 from io import StringIO
@@ -45,7 +44,6 @@ from flask.json import jsonify
 from flask_babel import (
     Babel,
     gettext,
-    format_date,
     format_decimal,
 )
 
@@ -79,6 +77,7 @@ from searx.webutils import (
     is_hmac_of,
     is_flask_run_cmdline,
     group_engines_in_tab,
+    searxng_l10n_timespan,
 )
 from searx.webadapter import (
     get_search_query_from_webapp,
@@ -718,25 +717,13 @@ def search():
         if 'url' in result:
             result['pretty_url'] = prettify_url(result['url'])
 
-        # TODO, check if timezone is calculated right  # pylint: disable=fixme
         if result.get('publishedDate'):  # do not try to get a date from an empty string or a None type
             try:  # test if publishedDate >= 1900 (datetime module bug)
                 result['pubdate'] = result['publishedDate'].strftime('%Y-%m-%d %H:%M:%S%z')
             except ValueError:
                 result['publishedDate'] = None
             else:
-                if result['publishedDate'].replace(tzinfo=None) >= datetime.now() - timedelta(days=1):
-                    timedifference = datetime.now() - result['publishedDate'].replace(tzinfo=None)
-                    minutes = int((timedifference.seconds / 60) % 60)
-                    hours = int(timedifference.seconds / 60 / 60)
-                    if hours == 0:
-                        result['publishedDate'] = gettext('{minutes} minute(s) ago').format(minutes=minutes)
-                    else:
-                        result['publishedDate'] = gettext('{hours} hour(s), {minutes} minute(s) ago').format(
-                            hours=hours, minutes=minutes
-                        )
-                else:
-                    result['publishedDate'] = format_date(result['publishedDate'])
+                result['publishedDate'] = searxng_l10n_timespan(result['publishedDate'])
 
         # set result['open_group'] = True when the template changes from the previous result
         # set result['close_group'] = True when the template changes on the next result

searx/webutils.py

@@ -7,11 +7,14 @@ import hmac
 import re
 import inspect
 import itertools
+from datetime import datetime, timedelta
 from typing import Iterable, List, Tuple, Dict
 
 from io import StringIO
 from codecs import getincrementalencoder
 
+from flask_babel import gettext, format_date
+
 from searx import logger, settings
 from searx.engines import Engine, OTHER_CATEGORY
 
@@ -138,6 +141,28 @@ def highlight_content(content, query):
     return content
 
 
+def searxng_l10n_timespan(dt: datetime) -> str:  # pylint: disable=invalid-name
+    """Returns a human-readable and translated string indicating how long ago
+    a date was in the past / the time span of the date to the present.
+
+    On January 1st, midnight, the returned string only indicates how many years
+    ago the date was.
+    """
+    # TODO, check if timezone is calculated right  # pylint: disable=fixme
+    d = dt.date()
+    t = dt.time()
+    if d.month == 1 and d.day == 1 and t.hour == 0 and t.minute == 0 and t.second == 0:
+        return str(d.year)
+    if dt.replace(tzinfo=None) >= datetime.now() - timedelta(days=1):
+        timedifference = datetime.now() - dt.replace(tzinfo=None)
+        minutes = int((timedifference.seconds / 60) % 60)
+        hours = int(timedifference.seconds / 60 / 60)
+        if hours == 0:
+            return gettext('{minutes} minute(s) ago').format(minutes=minutes)
+        return gettext('{hours} hour(s), {minutes} minute(s) ago').format(hours=hours, minutes=minutes)
+    return format_date(dt)
+
+
 def is_flask_run_cmdline():
     """Check if the application was started using "flask run" command line