+++ /dev/null
-# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
-# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
-#
-import re
-from urllib.parse import urlencode
-import warnings
-from httplib2 import socket
-from lxml import etree
-from scorched import connection, exc, search
-
-
-class CustomSolrConnection(connection.SolrConnection):
- def __init__(self, *args, **kw):
- super(CustomSolrConnection, self).__init__(*args, **kw)
- self.analysis_url = self.url + "analysis/field/"
-
- def analyze(self, params):
- qs = urlencode(params)
- url = "%s?%s" % (self.analysis_url, qs)
- if len(url) > self.max_length_get_url:
- warnings.warn("Long query URL encountered - POSTing instead of GETting. "
- "This query will not be cached at the HTTP layer")
- url = self.analysis_url
- kwargs = dict(
- method="POST",
- body=qs,
- headers={"Content-Type": "application/x-www-form-urlencoded"},
- )
- else:
- kwargs = dict(method="GET")
- response = self.request(url=url, **kwargs)
- if response.status_code != 200:
- raise exc.SolrError(response)
- return response.content
-
-
-class CustomSolrInterface(connection.SolrInterface):
- # just copied from parent and SolrConnection -> CustomSolrConnection
- def __init__(self, url, http_connection=None, mode='',
- retry_timeout=-1, max_length_get_url=connection.MAX_LENGTH_GET_URL,
- search_timeout=()):
- """
- :param url: url to Solr
- :type url: str
- :param http_connection: optional -- already existing connection
- :type http_connection: requests connection
- :param mode: optional -- mode (readable, writable) Solr
- :type mode: str
- :param retry_timeout: optional -- timeout until retry
- :type retry_timeout: int
- :param max_length_get_url: optional -- max length until switch to post
- :type max_length_get_url: int
- :param search_timeout: (optional) How long to wait for the server to
- send data before giving up, as a float, or a
- (connect timeout, read timeout) tuple.
- :type search_timeout: float or tuple
- """
-
- self.conn = CustomSolrConnection(
- url, http_connection, mode, retry_timeout, max_length_get_url)
- self.schema = self.init_schema()
- self._datefields = self._extract_datefields(self.schema)
-
-
- def _analyze(self, **kwargs):
- if not self.conn.readable:
- raise TypeError("This Solr instance is only for writing")
- args = {
- 'analysis_showmatch': True
- }
- if 'field' in kwargs:
- args['analysis_fieldname'] = kwargs['field']
- if 'text' in kwargs:
- args['analysis_fieldvalue'] = kwargs['text']
- if 'q' in kwargs:
- args['q'] = kwargs['q']
- if 'query' in kwargs:
- args['q'] = kwargs['q']
-
- params = [
- (k.replace('_', '.'), v)
- for (k, v) in search.params_from_dict(**args)
- ]
-
- content = self.conn.analyze(params)
- doc = etree.fromstring(content)
- return doc
-
- def highlight(self, **kwargs):
- doc = self._analyze(**kwargs)
- analyzed = doc.xpath("//lst[@name='index']/arr[last()]/lst[bool/@name='match']")
- matches = set()
- for wrd in analyzed:
- start = int(wrd.xpath("int[@name='start']")[0].text)
- end = int(wrd.xpath("int[@name='end']")[0].text)
- matches.add((start, end))
-
- if matches:
- return self.substring(
- kwargs['text'], matches, margins=kwargs.get('margins', 30), mark=kwargs.get('mark', ("<b>", "</b>")))
- else:
- return None
-
- def analyze(self, **kwargs):
- doc = self._analyze(**kwargs)
- terms = doc.xpath("//lst[@name='index']/arr[last()]/lst/str[1]")
- terms = map(lambda n: str(n.text), terms)
- return terms
-
- def expand_margins(self, text, start, end):
- totlen = len(text)
-
- def is_boundary(x):
- ws = re.compile(r"\W", re.UNICODE)
- return bool(ws.match(x))
-
- while start > 0:
- if is_boundary(text[start - 1]):
- break
- start -= 1
-
- while end < totlen - 1:
- if is_boundary(text[end + 1]):
- break
- end += 1
-
- return start, end
-
- def substring(self, text, matches, margins=30, mark=("<b>", "</b>")):
- totlen = len(text)
- matches_margins = [
- ((s, e), self.expand_margins(text, max(0, s - margins), min(totlen, e + margins))) for s, e in matches]
-
- # lets start with first match
- (start, end) = matches_margins[0][1]
- new_matches = [matches_margins[0][0]]
-
- for (m, (s, e)) in matches_margins[1:]:
- if end < s or start > e:
- continue
- start = min(start, s)
- end = max(end, e)
- new_matches.append(m)
-
- snip = text[start:end]
- new_matches.sort(key=lambda a: -a[0])
-
- for (s, e) in new_matches:
- off = -start
- snip = snip[:e + off] + mark[1] + snip[e + off:]
- snip = snip[:s + off] + mark[0] + snip[s + off:]
- snip = re.sub('%s[ \t\n]+%s' % (mark[1], mark[0]), " ", snip)
-
- return snip
fnp / wolnelektury.git / blobdiff