ppf/ppf.py

#!/usr/bin/env python2

import dbs
import time
import mysqlite
import proxywatchd
from misc import _log
from config import Config
import fetch
import sys
from soup_parser import soupify, set_nobs
import re
import threading
import random

config = Config()

def import_from_file(fn, sqlite):
    with open(fn, 'r') as f:
        urls = [ url for url in f.read().split('\n') if url ]
        cinc = 0
        while True:
            chunk = urls[cinc:cinc+200]
            if chunk: dbs.insert_urls(chunk, 'import.txt', urldb)
            else: break
            cinc = cinc + 200


def get_content_type(url, proxy):
    hdr = fetch.fetch_contents(url, head=True, proxy=proxy)

    for h in hdr.split('\n'):
        if h.lower().startswith('content-type: '): return h.lower().split(':')[1].strip()

    return ''

def is_good_content_type(string):
    allowed_ct = [ 'text/html', 'text/plain', 'atom+xml' ]
    for ct in allowed_ct:
        if ct.lower() in string.lower(): return True
    return False

def is_bad_url(uri, domain=None, samedomain=False):
    # if uri needs to be from same domain and domains missmatch
    if samedomain and str(uri.split('/')[2]).lower() != str(domain).lower():
        return True
    for u in urignore:
        if re.findall(u, uri): return True
    return False

def extract_urls(html, url):
    mytime = int(time.time())
    proto = url.split(':')[0]
    domain = url.split('/')[2]
    urls = []

    soup = soupify(html, nohtml=True)

    for a in soup.find_all('a', href=True):
        item = a['href'].encode('utf-8') if isinstance(a['href'], unicode) else a['href']
        item = item.strip()

        if item.startswith('www.'):
            item = 'http://%s' % item
        elif not item.startswith('http'):
            if not item.startswith('/'): item = '/%s' % item
            item = '%s://%s%s' % (proto,domain,item)

        elif is_bad_url(item, domain=domain, samedomain=config.ppf.extract_samedomain):
            continue
        if not item in urls: urls.append(item)

    if urls: dbs.insert_urls(urls, url, urldb) #insert_if_not_exists(urls)

def import_proxies_from_file(proxydb, fn):
    content = open(fn, 'r').read()
    unique_count, new = fetch.extract_proxies(content, proxydb)
    if new:
        dbs.insert_proxies(proxydb, new, fn)
        return 0
    return 1

class Leechered(threading.Thread):
    def __init__(self, url, stale_count, error, retrievals, proxies_added, content_type, proxy):
        self.status = 'nok'
        self.proxylist = []
        self.running = True
        self.url = url
        self.stale_count = stale_count
        self.error = error
        self.retrievals = retrievals
        self.proxies_added = proxies_added
        self.content_type = content_type
        self.proxy = proxy
        self.execute = ''
        threading.Thread.__init__(self)

    def retrieve(self):
        return self.url, self.proxylist, self.stale_count, self.error, self.retrievals, self.content_type, self.proxies_added, self.execute
    def status(self):
        return self.status

    def run(self):
        self.status = 'nok'

        if not self.content_type: self.content_type = get_content_type(self.url, self.proxy)

        if is_good_content_type(self.content_type):
            try:
                content = fetch.fetch_contents(self.url, proxy=self.proxy)
            except KeyboardInterrupt as e:
                raise e
            except Exception as e:
                _log('%s: fetch error: %s' % (self.url.split('/')[2], str(e)), 'error')
                content = ''
        else:
            content = ''

        unique = fetch.extract_proxies(content, filter_known=False)
        self.proxylist = [ proxy for proxy in unique if not fetch.is_known_proxy(proxy) ]
        proxy_count = len(self.proxylist)

        if self.retrievals == 0:    # new site
            if content and not self.proxylist: # site works but has zero proxy addresses
                self.error += 1
                self.stale_count += 1
            elif proxy_count:
                self.error = 0
                self.stale_count = 0
            else:
                self.error += 2
                self.stale_count += 2
        else:                                        # not a new site
            # proxylist is empty
            if not proxy_count:
                self.stale_count += 1
            # proxylist is not empty: site is working
            else:
                self.stale_count = 0
                self.error = 0
            # site has no content
            if not content:
                self.error += 1
                self.stale_count += 1
            #else:
            #   self.retrievals += 1
            #   self.error = 0
            #   self.stale_count = 0
            # site has proxies
            if proxy_count:
                self.error = 0
                self.stale_count = 0
                extract_urls(content, self.url)

        self.execute = (self.error, self.stale_count, int(time.time()), self.retrievals, self.proxies_added+len(self.proxylist), self.content_type, self.url)
        self.status = 'ok'


if __name__ == '__main__':
    config.load()
    errors = config.validate()
    if errors:
        for e in errors:
            _log(e, 'error')
        sys.exit(1)
    fetch.set_config(config)

    # handle --nobs flag
    args = config.aparser.parse_args()
    if args.nobs:
        set_nobs(True)


    proxydb = mysqlite.mysqlite(config.watchd.database, str)
    dbs.create_table_if_not_exists(proxydb, 'proxylist')
    fetch.init_known_proxies(proxydb)

    with open('urignore.txt', 'r') as f:
        urignore = [ i.strip() for i in f.read().split('\n') if i.strip() ]

    urldb = mysqlite.mysqlite(config.ppf.database, str)
    dbs.create_table_if_not_exists(urldb, 'uris')
    import_from_file('import.txt', urldb)
    if len(sys.argv) == 3 and sys.argv[1] == "--file":
        sys.exit(import_proxies_from_file(proxydb, sys.argv[2]))

    # start proxy watcher
    if config.watchd.threads > 0:
        watcherd = proxywatchd.Proxywatchd()
        watcherd.start()
    else:
        watcherd = None

    qurl = 'SELECT url,stale_count,error,retrievals,proxies_added,content_type FROM uris WHERE error < ? and (check_time+?+((error+stale_count)*?) <?) ORDER BY RANDOM()'
    threads = []
    rows = []
    reqtime = time.time() - 3600
    statusmsg = time.time()
    while True:
        try:
            time.sleep(random.random()/10)
            if (time.time() - statusmsg) > 180:
                _log('running %d thread(s) over %d' % (len(threads), config.ppf.threads), 'ppf')
                statusmsg = time.time()
            if not rows:
                if (time.time() - reqtime) > 3:
                    rows = urldb.execute(qurl, (config.ppf.max_fail, config.ppf.checktime, config.ppf.perfail_checktime, int(time.time()))).fetchall()
                    reqtime = time.time()
                if len(rows) < config.ppf.threads:
                    time.sleep(60)
                    rows = []
                else:
                    _log('handing %d job(s) to %d thread(s)' % ( len(rows), config.ppf.threads ), 'ppf')

            _proxylist = [ '%s://%s' % (p[0], p[1]) for p in proxydb.execute('SELECT proto,proxy from proxylist where failed=0').fetchall() ]
            if not _proxylist: _proxylist = None

            for thread in threads:
                if thread.status == 'ok':
                    url, proxylist, stale_count, error, retrievals, content_type, proxies_added, execute = thread.retrieve()
                    new = [ p for p in proxylist if not fetch.is_known_proxy(p) ]
                    if new:
                        fetch.add_known_proxies(new)
                    execute = (error, stale_count, int(time.time()), retrievals, proxies_added+len(new), content_type, url)
                    urldb.execute('UPDATE uris SET error=?,stale_count=?,check_time=?,retrievals=?,proxies_added=?,content_type=? where url=?', execute)
                    urldb.commit()
                    if new: dbs.insert_proxies(proxydb, new, url)

            threads = [ thread for thread in threads if thread.is_alive() ]
            if len(threads) < config.ppf.threads and rows:
                p = random.sample(_proxylist, 5) if _proxylist is not None else None
                row = random.choice(rows)
                urldb.execute('UPDATE uris SET check_time=? where url=?', (time.time(), row[0]))
                urldb.commit()
                rows.remove(row)
                t = Leechered(row[0], row[1], row[2], row[3], row[4], row[5], p)
                threads.append(t)
                t.start()

        except KeyboardInterrupt:
            if watcherd:
                watcherd.stop()
                watcherd.finish()
            break

    _log('ppf stopped', 'info')