1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
"""
Url Length Spider Middleware
See documentation in docs/topics/spider-middleware.rst
"""
from scrapy import log
from scrapy.http import Request
from scrapy.core.exceptions import NotConfigured
from scrapy.conf import settings
class UrlLengthMiddleware(object):
def __init__(self):
self.maxlength = settings.getint('URLLENGTH_LIMIT')
if not self.maxlength:
raise NotConfigured
def process_spider_output(self, response, result, spider):
def _filter(request):
if isinstance(request, Request) and len(request.url) > self.maxlength:
log.msg("Ignoring link (url length > %d): %s " % (self.maxlength, request.url), \
level=log.DEBUG, spider=spider)
return False
else:
return True
return (r for r in result or () if _filter(r))
|
