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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 datetime import datetime
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import re
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from searx.url_utils import urlencode
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from searx.utils import searx_useragent
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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.text)
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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 = 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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