Tornado – Whoosh – Highlighted Search

So common use case of a Search Engine.. Don’t you observe Google highlights the keywords the user searches for? That is what we achieve in this example below

import whoosh,os
from whoosh import index
import whoosh.index
import whoosh.fields
import whoosh.qparser
import tornado.ioloop
import tornado.web
from whoosh import analysis, fields, formats, query, highlight
class Search(object):
def __init__(self, indexdir, searchstr=None):
self.indexdir = indexdir
self.searchstr = searchstr
def searcher(self):
schema = whoosh.fields.Schema(
path = whoosh.fields.ID(unique=True, stored=True),
title = whoosh.fields.TEXT(stored=True, phrase=False),
content = whoosh.fields.TEXT(stored=True, spelling=True),
tag = whoosh.fields.TEXT(stored=True),
category = whoosh.fields.TEXT(stored=True))
if not os.path.exists(self.indexdir):
os.mkdir(self.indexdir)
ix = index.create_in(self.indexdir, schema)
writer = ix.writer()
writer.add_document(title=u"Welcome", content=u"This is welcome blog!",
path=u"/welcome", tag=u"Welcome", category=u"Welcome")
writer.add_document(title=u"Python Whoosh", content=u"Whoosh search library in pure Python",
path=u"/whoosh", tag=u"whoosh", category=u"Search")
writer.add_document(title=u"Python Tornado", content=u"Tornado Web Server for real-time web apps",
path=u"/tornado", tag=u"tornado", category=u"Web Server")
writer.add_document(title=u"Python Tornado Async", content=u"Tornado Web Server provides async web requests",
path=u"/tornadoasync", tag=u"async", category=u"Web Server")
writer.add_document(title=u"Python Tornado Templates", content=u"Tornado Web Server has template feature",
path=u"/tornadotemplates", tag=u"templates", category=u"Web Server")
writer.add_document(title=u"Python Tornado", content=u"Tornado Web Server is awesome",
path=u"/tornado", tag=u"great", category=u"Web Server")
writer.commit()
_queryparser = whoosh.qparser.QueryParser('content', schema=schema)
s = ix.searcher()
return s
class Home(tornado.web.RequestHandler):
def get(self):
self.write('It Works!')
class HighLighted(tornado.web.RequestHandler):
def get(self):
self.render('highlighted.html')
def post(self):
from whoosh import qparser
qstring = self.get_argument('qstring')
srch = Search('./indexer')
s = srch.searcher()
results = s.search(query.Term('content', qstring), limit=10)
titles = ''; contents = ''
for hit in results:
titles += hit["title"] + ' '
contents += hit.highlights("content") + ' '
self.write('Titles Hit: ' + titles + '<br /> ' + 'Contents Hit: ' + contents)
application = tornado.web.Application([
(r"/",Home ),
(r"/highlighted", HighLighted ),
])
if __name__ == "__main__":
application.listen(7777)
tornado.ioloop.IOLoop.instance().start()

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tornadowhoosh.py
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Search results for highlighted search

 

 

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