import sqlite3
import urllib.error
import ssl
from urllib.parse import urljoin
from urllib.parse import urlparse
from urllib.request import urlopen
from bs4 import BeautifulSoup
# Ignore SSL certificate errors
ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE
conn = sqlite3.connect('spider.sqlite')
cur = conn.cursor()
cur.execute('''CREATE TABLE IF NOT EXISTS Pages
(id INTEGER PRIMARY KEY, url TEXT UNIQUE, html TEXT,
error INTEGER, old_rank REAL, new_rank REAL)''')
cur.execute('''CREATE TABLE IF NOT EXISTS Links
(from_id INTEGER, to_id INTEGER, UNIQUE(from_id, to_id))''')
cur.execute('''CREATE TABLE IF NOT EXISTS Webs (url TEXT UNIQUE)''')
# Check to see if we are already in progress...
cur.execute('SELECT id,url FROM Pages WHERE html is NULL and error is NULL ORDER BY RANDOM() LIMIT 1')
row = cur.fetchone()
if row is not None:
print("Restarting existing crawl. Remove spider.sqlite to start a fresh crawl.")
else :
starturl = input('Enter web url or enter: ')
if ( len(starturl) < 1 ) : starturl = 'http://www.dr-chuck.com/'
if ( starturl.endswith('/') ) : starturl = starturl[:-1]
web = starturl
if ( starturl.endswith('.htm') or starturl.endswith('.html') ) :
pos = starturl.rfind('/')
web = starturl[:pos]
if ( len(web) > 1 ) :
cur.execute('INSERT OR IGNORE INTO Webs (url) VALUES ( ? )', ( web, ) )
cur.execute('INSERT OR IGNORE INTO Pages (url, html, new_rank) VALUES ( ?, NULL, 1.0 )', ( starturl, ) )
conn.commit()
# Get the current webs
cur.execute('''SELECT url FROM Webs''')
webs = list()
for row in cur:
webs.append(str(row[0]))
print(webs)
many = 0
while True:
if ( many < 1 ) :
sval = input('How many pages:')
if ( len(sval) < 1 ) : break
many = int(sval)
many = many - 1
cur.execute('SELECT id,url FROM Pages WHERE html is NULL and error is NULL ORDER BY RANDOM() LIMIT 1')
try:
row = cur.fetchone()
# print row
fromid = row[0]
url = row[1]
except:
print('No unretrieved HTML pages found')
many = 0
break
print(fromid, url, end=' ')
# If we are retrieving this page, there should be no links from it
cur.execute('DELETE from Links WHERE from_id=?', (fromid, ) )
try:
document = urlopen(url, context=ctx)
html = document.read()
if document.getcode() != 200 :
print("Error on page: ",document.getcode())
cur.execute('UPDATE Pages SET error=? WHERE url=?', (document.getcode(), url) )
if 'text/html' != document.info().get_content_type() :
print("Ignore non text/html page")
cur.execute('DELETE FROM Pages WHERE url=?', ( url, ) )
conn.commit()
continue
print('('+str(len(html))+')', end=' ')
soup = BeautifulSoup(html, "html.parser")
except KeyboardInterrupt:
print('')
print('Program interrupted by user...')
break
except:
print("Unable to retrieve or parse page")
cur.execute('UPDATE Pages SET error=-1 WHERE url=?', (url, ) )
conn.commit()
continue
cur.execute('INSERT OR IGNORE INTO Pages (url, html, new_rank) VALUES ( ?, NULL, 1.0 )', ( url, ) )
cur.execute('UPDATE Pages SET html=? WHERE url=?', (memoryview(html), url ) )
conn.commit()
# Retrieve all of the anchor tags
tags = soup('a')
count = 0
for tag in tags:
href = tag.get('href', None)
if ( href is None ) : continue
# Resolve relative references like href="/contact"
up = urlparse(href)
if ( len(up.scheme) < 1 ) :
href = urljoin(url, href)
ipos = href.find('#')
if ( ipos > 1 ) : href = href[:ipos]
if ( href.endswith('.png') or href.endswith('.jpg') or href.endswith('.gif') ) : continue
if ( href.endswith('/') ) : href = href[:-1]
# print href
if ( len(href) < 1 ) : continue
# Check if the URL is in any of the webs
found = False
for web in webs:
if ( href.startswith(web) ) :
found = True
break
if not found : continue
cur.execute('INSERT OR IGNORE INTO Pages (url, html, new_rank) VALUES ( ?, NULL, 1.0 )', ( href, ) )
count = count + 1
conn.commit()
cur.execute('SELECT id FROM Pages WHERE url=? LIMIT 1', ( href, ))
try:
row = cur.fetchone()
toid = row[0]
except:
print('Could not retrieve id')
continue
# print fromid, toid
cur.execute('INSERT OR IGNORE INTO Links (from_id, to_id) VALUES ( ?, ? )', ( fromid, toid ) )
print(count)
cur.close()
"But I have only one disguise in the house--the old one." "How much is it, madame?" "9. Van Hoeyaerden, member of the Town Council. 121 Previous to his forty-ninth year, Plotinus wrote nothing. At that age he began to compose short essays on subjects which suggested themselves in the course of his oral teaching. During the next ten years, he produced twenty-one such278 papers, some of them only a page or two in length. At the end of that period, he made the acquaintance of his future editor and biographer, Porphyry, a young student of Semitic extraction, whose original name was Malchus. The two soon became fast friends; and whatever speculative differences at first divided them were quickly removed by an amicable controversy between Porphyry and another disciple named Amelius, which resulted in the unreserved adhesion of the former to the doctrine of their common master.415 The literary activity of Plotinus seems to have been powerfully stimulated by association with the more methodical mind of Porphyry. During the five years416 of their personal intercourse he produced nineteen essays, amounting altogether to three times the bulk of the former series. Eight shorter pieces followed during the period of failing health which preceded his death, Porphyry being at that time absent in Sicily, whither he had retired when suffering from the fit of depression already mentioned. He did not answer at once, but sat watching the trumpeter come out of the adjutant's office to sound recall. "Yes, she will marry," he agreed; "if no one else marries her, I will. I am as old as her father would have been but it would save telling some fellow about her birth." "You must get Mrs. Landor into the post to-morrow," Cairness said abruptly; "Victorio's band is about." The next day he left for the Circle K Ranch. Lawton did not appear to need help. But he fired a Greaser, nevertheless, and took Cairness on. He seemed to stand in as abject awe of Stone's note as an Arab might have stood of a bit of the black covering of the Kaabah stone. On the 9th of January, a month after their arrival, Lord Derwentwater was impeached of high treason by Mr. Lechmere in a bitter speech in the Commons. Other members, with equal acrimony, followed with impeachments against the Lords Widdrington, Nithsdale, Wintoun, Carnwath, Kenmure, and Nairn. The impeachments were carried up to the House of Lords on the same day, and on the 19th the accused noblemen were brought before the Peers, where they knelt at the bar until they were desired to rise by the Lord Chancellor, when, with the exception of Lord Wintoun, they confessed their guilt, and threw themselves on the mercy of the king. Sentence of death was immediately pronounced on those who had pleaded guilty; and Lord Wintoun was condemned after trial, but several months later he effected his escape from the Tower. Every effort was made to save the prisoners, and they were all reprieved, with the exception of Derwentwater, Kenmure, and Nithsdale. The first two were executed; but the Countess of Nithsdale, being about to take her leave of her husband, contrived, by introducing some friends, to secure his escape in female attire. Q, 200th Ind. Rush. Yours, Jim." "Reckon I can," said Albert good-naturedly, knowing that some day he might want his brother to do the same for him. "Lie there, dog!—there goes one of the accursed council!" and, springing up the step with a giant grasp, he seized the mitred chancellor by the neck, and dragged him forth into the centre of the church. HoME有没有泷泽萝拉的呀
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