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solrutils.py
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solrutils.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2011 CERN.
##
## Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""
Solr utilities.
"""
import urllib2
import urllib
import mimetools
from invenio import intbitset
from invenio.jsonutils import json
def solr_get_facets(bitset, solr_url):
facet_query_url = "%s/invenio_facets" % solr_url
# now use the bitset to fetch the facet data
r = urllib2.Request(facet_query_url)
data = bitset.fastdump()
boundary = mimetools.choose_boundary()
# fool solr into thinking we're uploading a file so it will read our data as a stream
contents = '--%s\r\n' % boundary
contents += 'Content-Disposition: form-data; name="bitset"; filename="bitset"\r\n'
contents += 'Content-Type: application/octet-stream\r\n'
contents += '\r\n' + data + '\r\n'
contents += '--%s--\r\n\r\n' % boundary
r.add_data(contents)
contenttype = 'multipart/form-data; boundary=%s' % boundary
r.add_unredirected_header('Content-Type', contenttype)
# post the request and get back the facets as json
u = urllib2.urlopen(r)
return json.load(u)
def solr_get_bitset(query, solr_url):
invenio_query_url = "%s/select?qt=invenio_query&q=fulltext:%s" % (solr_url, urllib.quote(query))
# query to get a bitset
bitset = intbitset.intbitset()
u = urllib2.urlopen(invenio_query_url)
data = u.read()
bitset.fastload(data)
return bitset

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