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[enh] Add BASE engine in category Science. Basic and advanced search.
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122
searx/engines/base.py
Executable file
122
searx/engines/base.py
Executable file
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#!/usr/bin/env python
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"""
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BASE (Scholar publications)
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@website https://base-search.net
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@provide-api yes with authorization (https://api.base-search.net/)
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@using-api yes
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@results XML
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@stable ?
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@parse url, title, publishedDate, content
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More info on api: http://base-search.net/about/download/base_interface.pdf
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"""
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from lxml import etree
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from urllib import urlencode
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from searx.utils import searx_useragent
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from cgi import escape
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from datetime import datetime
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import re
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categories = ['science']
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base_url = 'https://api.base-search.net/cgi-bin/BaseHttpSearchInterface.fcgi'\
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+ '?func=PerformSearch&{query}&boost=oa&hits={hits}&offset={offset}'
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# engine dependent config
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paging = True
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number_of_results = 10
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# shortcuts for advanced search
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shorcut_dict = {
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# user-friendly keywords
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'format:': 'dcformat:',
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'author:': 'dccreator:',
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'collection:': 'dccollection:',
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'hdate:': 'dchdate:',
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'contributor:': 'dccontributor:',
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'coverage:': 'dccoverage:',
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'date:': 'dcdate:',
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'abstract:': 'dcdescription:',
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'urls:': 'dcidentifier:',
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'language:': 'dclanguage:',
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'publisher:': 'dcpublisher:',
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'relation:': 'dcrelation:',
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'rights:': 'dcrights:',
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'source:': 'dcsource:',
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'subject:': 'dcsubject:',
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'title:': 'dctitle:',
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'type:': 'dcdctype:'
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}
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def request(query, params):
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# replace shortcuts with API advanced search keywords
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for key in shorcut_dict.keys():
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query = re.sub(str(key), str(shorcut_dict[key]), query)
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# basic search
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offset = (params['pageno'] - 1) * number_of_results
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string_args = dict(query=urlencode({'query': query}),
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offset=offset,
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hits=number_of_results)
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params['url'] = base_url.format(**string_args)
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params['headers']['User-Agent'] = searx_useragent()
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return params
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def response(resp):
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results = []
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search_results = etree.XML(resp.content)
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for entry in search_results.xpath('./result/doc'):
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content = "No description available"
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date = datetime.now() # needed in case no dcdate is available for an item
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for item in entry:
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if item.attrib["name"] == "dchdate":
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harvestDate = item.text
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elif item.attrib["name"] == "dcdate":
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date = item.text
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elif item.attrib["name"] == "dctitle":
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title = item.text
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elif item.attrib["name"] == "dclink":
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url = item.text
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elif item.attrib["name"] == "dcdescription":
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content = escape(item.text[:300])
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if len(item.text) > 300:
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content += "..."
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# dates returned by the BASE API are not several formats
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publishedDate = None
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for date_format in ['%Y-%m-%dT%H:%M:%SZ', '%Y-%m-%d', '%Y-%m', '%Y']:
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try:
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publishedDate = datetime.strptime(date, date_format)
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break
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except:
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pass
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if publishedDate is not None:
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res_dict = {'url': url,
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'title': title,
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'publishedDate': publishedDate,
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'content': content}
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else:
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res_dict = {'url': url,
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'title': title,
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'content': content}
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results.append(res_dict)
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return results
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@ -34,9 +34,15 @@ outgoing: # communication with search engines
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# - 1.1.1.2
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engines:
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<<<<<<< HEAD
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- name : arch linux wiki
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engine : archlinux
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shortcut : al
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=======
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- name : base
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engine : base
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shortcut : bs
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>>>>>>> Add BASE engine in category Science. Basic and advanced request.
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- name : wikipedia
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engine : mediawiki
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@ -408,17 +408,21 @@ def index():
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# TODO, check if timezone is calculated right
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if 'publishedDate' in result:
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result['pubdate'] = result['publishedDate'].strftime('%Y-%m-%d %H:%M:%S%z')
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if result['publishedDate'].replace(tzinfo=None) >= datetime.now() - timedelta(days=1):
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timedifference = datetime.now() - result['publishedDate'].replace(tzinfo=None)
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minutes = int((timedifference.seconds / 60) % 60)
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hours = int(timedifference.seconds / 60 / 60)
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if hours == 0:
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result['publishedDate'] = gettext(u'{minutes} minute(s) ago').format(minutes=minutes)
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else:
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result['publishedDate'] = gettext(u'{hours} hour(s), {minutes} minute(s) ago').format(hours=hours, minutes=minutes) # noqa
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try: # test if publishedDate >= 1900 (datetime module bug)
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result['pubdate'] = result['publishedDate'].strftime('%Y-%m-%d %H:%M:%S%z')
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except ValueError:
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result['publishedDate'] = None
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else:
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result['publishedDate'] = format_date(result['publishedDate'])
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if result['publishedDate'].replace(tzinfo=None) >= datetime.now() - timedelta(days=1):
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timedifference = datetime.now() - result['publishedDate'].replace(tzinfo=None)
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minutes = int((timedifference.seconds / 60) % 60)
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hours = int(timedifference.seconds / 60 / 60)
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if hours == 0:
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result['publishedDate'] = gettext(u'{minutes} minute(s) ago').format(minutes=minutes)
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else:
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result['publishedDate'] = gettext(u'{hours} hour(s), {minutes} minute(s) ago').format(hours=hours, minutes=minutes) # noqa
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else:
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result['publishedDate'] = format_date(result['publishedDate'])
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if search.request_data.get('format') == 'json':
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return Response(json.dumps({'query': search.query,
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