when you want to climb the list page, url will stop the list crawling when you find that there are articles that have been crawled. Otherwise, how can you continue to the next page?
when you want to climb the list page, url will stop the list crawling when you find that there are articles that have been crawled. Otherwise, how can you continue to the next page?
crawled url is written to the record, such as the pickle file. Just pull it out and check it out when you need it.
you can calculate the MD5 value based on the crawled url, put it in the redis database, and judge whether it is there or not when you crawl. The efficiency of redis is very high, so you don't have to worry about efficiency
.import hashlib
import redis
def md_url(url):
md5 = hashlib.md5()
md5.update(url.encode('utf-8'))
return md5.hexdigest()
def exist_or_not(finger_print):
-sharp 0
ex = conn.sadd('urls', finger_print)
return exfor example, for the following data <p id="a">data I just want to keep data is there a quick way to do this? ...
excuse me, how does the pyspider, running on the centos7.2 server open webui? through the public network IP? config is written like this { "scheduler" : { "xmlrpc-host": "0.0.0.0", "delete-time&qu...
problem description capture answers similar to Zhihu because there are so many answers from Zhihu, response.save is used to save the results of crawling ahead because Zhihu site cannot be crawled too fast, the task may not be completed in time so ...
centos7 pyspider 1, run in the background with nohup pyspider all > pyspider.log 2 > & 1 & occasionally hang up 2, and there is no reason for outputting pyspider.log. 3, what if the previously written project disappears after restarting pyspider. ...
pyspider starts with config file result crawled only one piece of data ...
find a basic detailed process pip install pyspider SyntaxError: invalid syntax pip3 install pyspider SyntaxError: invalid syntax ...