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import urllib
import sgmllib
import re
import os
savedir = "/home/slash/Pictures/4grab/"
class MyParser(sgmllib.SGMLParser):
"A simple parser class."
def parse(self, s):
"Parse the given string 's'."
self.feed(s)
self.close()
def __init__(self, verbose=0):
"Initialise an object, passing 'verbose' to the superclass."
sgmllib.SGMLParser.__init__(self, verbose)
self.hyperlinks = []
self.url_reg = re.compile('res/\d+\Z')
self.img_reg = re.compile('/\d+\.(jpg|gif|bmp|png|jpeg)\Z')
def start_a(self, attributes):
"Process a hyperlink and its 'attributes'."
for name, value in attributes:
if name == "href":
if self.url_reg.search(value) != None:
self.hyperlinks.append(value)
def get_hyperlinks(self):
"Return the list of hyperlinks."
return self.hyperlinks
class MySubParser(MyParser):
def __init__(self, verbose=0):
MyParser.__init__(self, verbose)
self.url_reg = re.compile('/src/\d+\.\w{3,4}\Z')
if __name__ == "__main__":
# Get a file-like object for the 4chan.org w/imgboard
base_url = "http://boards.4chan.org/w/"
myparser = MyParser()
total = 10
for i in range(0, total):
if i > 0:
url = base_url + str(i)
else:
url = base_url
tries = 10
while tries > 0:
try:
f = urllib.urlopen(url)
break
except IOError:
tries = tries - 1
print "Try of", url, "failed,", tries, "tries left"
if not f is None:
# Read the object
s = f.read()
f.close()
# Try and process the page.
# The class should have been defined first, remember.
myparser.parse(s)
print "Parsed", url, "-", i + 1, "of", total
else:
"Opening of", url, "did not succeed, trying next one..."
# Get the hyperlinks.
t = myparser.get_hyperlinks()
mysubparser = MySubParser()
total = len(t)
i = 1
for link in t:
img_url = base_url + link
tries = 10
while tries > 0:
try:
f = urllib.urlopen(img_url)
break
except IOError:
tries = tries - 1
print "Try of", img_url, "failed,", tries, "tries left"
if not f is None:
s = f.read()
f.close()
mysubparser.parse(s)
print "Parsed", img_url, "-", i, "of", total
else:
print "Opening of", img_url, "did not succeed, trying next one..."
i = i + 1
t = mysubparser.get_hyperlinks()
total = len(t)
i = 1
for link in t:
filename = os.path.join(savedir, os.path.split(link)[1])
if not os.path.exists(filename):
tries = 10
while tries > 0:
try:
urllib.urlretrieve(link, filename)
print "Retrieved", link, "-", i, "of", total
break
except IOError:
tries = tries - 1
print "Downloading of", link, "failed,", tries, "left"
else:
print "Not downloading", link, "already downloaded"
i = i + 1
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