example_minimal.py

# -*- coding: utf-8 -*-

# MIT License
#
# Copyright (c) 2017 Tijme Gommers
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

from nyawc.Options import Options
from nyawc.Crawler import Crawler
from nyawc.QueueItem import QueueItem
from nyawc.CrawlerActions import CrawlerActions
from nyawc.http.Request import Request

def cb_crawler_before_start():
    print("Crawler started.")

def cb_crawler_after_finish(queue):
    print("Crawler finished.")
    print("Found " + str(len(queue.get_all(QueueItem.STATUS_FINISHED))) + " requests.")

def cb_request_before_start(queue, queue_item):
    print("Starting: {}".format(queue_item.request.url))
    return CrawlerActions.DO_CONTINUE_CRAWLING

def cb_request_after_finish(queue, queue_item, new_queue_items):
    print("Finished: {}".format(queue_item.request.url))
    return CrawlerActions.DO_CONTINUE_CRAWLING

options = Options()

options.callbacks.crawler_before_start = cb_crawler_before_start # Called before the crawler starts crawling. Default is a null route.
options.callbacks.crawler_after_finish = cb_crawler_after_finish # Called after the crawler finished crawling. Default is a null route.
options.callbacks.request_before_start = cb_request_before_start # Called before the crawler starts a new request. Default is a null route.
options.callbacks.request_after_finish = cb_request_after_finish # Called after the crawler finishes a request. Default is a null route.

crawler = Crawler(options)
crawler.start_with(Request("https://finnwea.com/"))