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crawler.py
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"""
Open Crawler v 1.0.0
License - MIT ,
An open source crawler/spider
Features :
- Cross Platform
- Installer for linux
- Related-CLI Tools (includes ,CLI access to tool, not that good search-tool xD, etc)
- Memory efficient [ig]
- Pool Crawling - Use multiple crawlers at same time
- Supports Robot.txt
- MongoDB [DB]
- Language Detection
- 18 + Checks / Offensive Content Check
- Proxies
- Multi Threading
- Url Scanning
- Keyword, Desc And recurring words Logging
Author - Merwin M
"""
from memory_profiler import profile
from collections import Counter
from functools import lru_cache
from bs4 import BeautifulSoup
from langdetect import detect
from mongo_db import *
from rich import print
import urllib.robotparser
import threading
import requests
import signal
import atexit
import random
import json
import time
import sys
import re
import os
"""
######### Crawled Info are stored in Mongo DB as #####
Crawled sites = [
{
"website" : "<website>"
"time" : "<last_crawled_in_epoch_time>",
"mal" : Val/None, # malicious or not
"offn" : Val/None, # 18 +/ Offensive language
"ln" : "<language>",
"keys" : [<meta-keywords>],
"desc" : "<meta-desc>",
"recc" : [<recurring words>]/None,
}
]
"""
## Regex patterns
html_pattern = re.compile(r'<[^>]+>')
url_extract_pattern = "https?:\\/\\/(?:www\\.)?[-a-zA-Z0-9@:%._\\+~#=]{1,256}\\.[a-zA-Z0-9()]{1,6}\\b(?:[-a-zA-Z0-9()@:%_\\+.~#?&\\/=]*)"
url_pattern = "^https?:\\/\\/(?:www\\.)?[-a-zA-Z0-9@:%._\\+~#=]{1,256}\\.[a-zA-Z0-9()]{1,6}\\b(?:[-a-zA-Z0-9()@:%_\\+.~#?&\\/=]*)$"
url_pattern_0 = "^[-a-zA-Z0-9@:%._\\+~#=]{1,256}\\.[a-zA-Z0-9()]{1,6}\\b(?:[-a-zA-Z0-9()@:%_\\+.~#?&\\/=]*)$"
url_extract_pattern_0 = "[-a-zA-Z0-9@:%._\\+~#=]{1,256}\\.[a-zA-Z0-9()]{1,6}\\b(?:[-a-zA-Z0-9()@:%_\\+.~#?&\\/=]*)"
# Config File
config_file = "config.json"
# Load configs from config_file - > json
try:
config_file = open(config_file, "r")
configs = json.loads(config_file.read())
config_file.close()
except:
try:
os.system("python3 config.py") # Re-configures
except:
os.system("python config.py") # Re-configures
config_file = open(config_file, "r")
configs = json.loads(config_file.read())
config_file.close()
## Setting Up Configs
MONGODB_PWD = configs["MONGODB_PWD"]
MONGODB_URI = configs["MONGODB_URI"]
TIMEOUT = configs["TIMEOUT"] # Timeout for reqs
MAX_THREADS = configs["MAX_THREADS"]
bad_words = configs["bad_words"]
USE_PROXIES = configs["USE_PROXIES"]
Scan_Bad_Words = configs["Scan_Bad_Words"]
Scan_Top_Keywords = configs["Scan_Top_Keywords"]
URL_SCAN = configs["URL_SCAN"]
urlscan_key = configs["urlscan_key"]
del configs
## Main Vars
EXIT_FLAG = False
DB = None
ROBOT_SCANS = [] # On Going robot scans
WEBSITE_SCANS = [] # On Going website scans
# Loads bad words / flaged words
file = open(bad_words, "r")
bad_words = file.read()
file.close()
bad_words = tuple(bad_words.split("\n"))
# @lru_cache(maxsize=100)
# def get_robot(domain):
# """
# reads robots.txt
# """
# print(f"[green] [+] Scans - {domain} for restrictions")
# rp = urllib.robotparser.RobotFileParser()
# rp.set_url("http://" + domain + "/robots.txt")
# return rp.can_fetch
def get_top_reccuring(txt):
"""
Gets most reccuring 8 terms from the website html
txt : str
returns : list
"""
split_it = txt.split()
counter = Counter(split_it)
try:
most_occur = counter.most_common(8)
return most_occur
except:
return []
def lang_d(txt):
"""
Scans for bad words/ flaged words.
txt : str
return : int - > score
"""
if not Scan_Bad_Words:
return None
score = 0
for e in bad_words:
try:
x = txt.split(e)
except:
continue
score += len(x)-1
try:
score = round(score/len(txt))
except:
pass
return score
def get_proxy():
"""
Gets a free proxy from 'proxyscrape'
returns : dict - > {"http": "<proxy ip:port>"}
"""
res = requests.get("https://api.proxyscrape.com/v2/?request=displayproxies&protocol=http&timeout=10000&country=all&ssl=all&anonymity=all")
return {"http" : random.choice(res.text.split("\r\n"))}
def scan_url(url):
"""
Scans url for malicious stuff , Uses the Urlscan API
url : str
return : int - > score
"""
headers = {'API-Key':urlscan_key,'Content-Type':'application/json'}
data = {"url": url, "visibility": "public"}
r = requests.post('https://urlscan.io/api/v1/scan/',headers=headers, data=json.dumps(data))
print(r.json())
r = "https://urlscan.io/api/v1/result/" + r.json()["uuid"]
for e in range(0,100):
time.sleep(2)
res = requests.get(r, headers)
res = res.json()
try:
if res["status"] == 404:
pass
except:
print(res["verdicts"])
return res["verdicts"]["urlscan"]["score"]
return None
def remove_html(string):
"""
removes html tags
string : str
return : str
"""
return html_pattern.sub('', string)
def handler(SignalNumber, Frame): # for handling SIGINT
safe_exit()
signal.signal(signal.SIGINT, handler) # register handler
def safe_exit(): # safely exits the program
global EXIT_FLAG
print(f"\n\n[blue] [\] Exit Triggered At : {time.time()} [/blue]")
EXIT_FLAG = True
print("[red] EXITED [/red]")
atexit.register(safe_exit) # registers at exit handler
def forced_crawl(website):
"""
Crawl a website forcefully - ignorring the crawl wait list
website : string
"""
# Checks if crawled already , y__ = crawled or not , True/False
z__ = if_crawled(website)
y__ = z__[0]
mal = None
lang_18 = None
lang = None
# Current thread no. as there is no separate threads for crawling, set as 0
th = 0
print(f"[green] [+] Started Crawling : {website} | Thread : {th}[/green]")
proxies = {}
if USE_PROXIES:
proxies = get_proxy()
try:
website_req = requests.get(website, headers = {"user-agent":"open crawler v 1.0.0"}, proxies = proxies, timeout = TIMEOUT)
# checks if content is html or skips
try:
if not "html" in website_req.headers["Content-Type"]:
print(f"[green] [+] Skiped : {website} Because Content type not 'html' | Thread : {th}[/green]")
return 0
except:
return 0
website_txt = website_req.text
if not y__:
save_crawl(website, time.time(), 0,0,0,0,0,0,)
else:
update_crawl(website, time.time(), 0,0,0,0,0,0)
except:
# could be because website is down or the timeout
print(f"[red] [-] Coundn't Crwal : {website} | Thread : {th}[/red]")
if not y__:
save_crawl(website, time.time(), "ERROR OCCURED", 0, 0, 0, 0, 0)
else:
update_crawl(website, time.time(), "ERROR OCCURED", 0, 0, 0, 0, 0)
return 0
try:
lang = detect(website_txt)
except:
lang = "un-dic"
if URL_SCAN:
mal = scan_url(website)
website_txt_ = remove_html(website_txt)
if Scan_Bad_Words:
lang_18 = lang_d(website_txt_)
keywords = []
desc = ""
soup = BeautifulSoup(website_txt, 'html.parser')
for meta in soup.findAll("meta"):
try:
if meta["name"] == "keywords":
keywords = meta["content"]
except:
pass
try:
if meta["name"] == "description":
desc = meta["content"]
except:
pass
del soup
top_r = None
if Scan_Top_Keywords:
top_r = get_top_reccuring(website_txt_)
update_crawl(website, time.time(), mal, lang_18, lang, keywords, desc, top_r)
del mal, lang_18, lang, keywords, desc, top_r
sub_urls = []
for x in re.findall(url_extract_pattern, website_txt):
if re.match(url_pattern, x):
if ".onion" in x:
# skips onion sites
continue
if x[-1] == "/" or x.endswith(".html") or x.split("/")[-1].isalnum():
# tries to filture out not crawlable urls
sub_urls.append(x)
# removes all duplicates
sub_urls = set(sub_urls)
sub_urls = list(sub_urls)
# check for restrictions in robots.txt and filture out the urls found
for sub_url in sub_urls:
if if_waiting(sub_url):
sub_urls.remove(sub_url)
continue
# restricted = robots_txt.disallowed(sub_url, proxies)
# t = sub_url.split("://")[1].split("/")
# t.remove(t[0])
# t_ = ""
# for u in t:
# t_ += "/" + u
# t = t_
# restricted = tuple(restricted)
# for resk in restricted:
# if t.startswith(resk):
# sub_urls.remove(sub_url)
# break
site = sub_url.replace("https://", "")
site = site.replace("http://", "")
domain = site.split("/")[0]
# print(f"[green] [+] Scans - {domain} for restrictions")
rp = urllib.robotparser.RobotFileParser()
rp.set_url("http://" + domain + "/robots.txt")
# a = get_robot(domain)
if not rp.can_fetch("*", sub_url):
sub_urls.remove(sub_url)
# try:
# restricted = get_robots(domain)
# except:
# print(f"[green] [+] Scans - {domain} for restrictions")
# restricted = robots_txt.disallowed(sub_url, proxies)
# save_robots(domain, restricted)
# restricted = tuple(restricted)
# t = sub_url.split("://")[1].split("/")
# t.remove(t[0])
# t_ = ""
# for u in t:
# t_ += "/" + u
# t = t_
# for resk in restricted:
# if t.startswith(resk):
# sub_urls.remove(sub_url)
# break
# check if there is a need of crawling
for e in sub_urls:
z__ = if_crawled(e)
y__ = z__[0]
t__ = z__[1]
if y__:
if t__ < time.time() - 604800 : # Re-Crawls Only After 7
sub_urls.remove(e)
continue
try:
website_req = requests.get(e, headers = {"user-agent":"open crawler v 1.0.0"}, proxies = proxies, timeout = TIMEOUT)
except:
sub_urls.remove(e)
continue
try:
if not "html" in website_req.headers["Content-Type"]:
print(f"[green] [+] Skiped : {e} Because Content type not 'html' | Thread : {th}[/green]")
sub_urls.remove(e)
continue
except:
sub_urls.remove(e)
continue
write_to_wait_list(sub_urls)
del sub_urls
print(f"[green] [+] Crawled : {website} | Thread : {th}[/green]")
## for checking the memory usage uncomment @profile , also uncoment for main()
# @profile
def crawl(th):
global ROBOT_SCANS, WEBSITE_SCANS
time.sleep(th)
if EXIT_FLAG:
return 1
while not EXIT_FLAG:
# gets 10 urls from waitlist
sub_urls = get_wait_list(10)
for website in sub_urls:
if website in WEBSITE_SCANS:
continue
else:
WEBSITE_SCANS.append(website)
website_url = website
website = website["website"]
update = False
# Checks if crawled already , y__ = crawled or not , True/False
z__ = if_crawled(website)
y__ = z__[0]
t__ = z__[1]
if y__:
update = True
if int(t__) < int(time.time()) - 604800 : # Re-Crawls Only After 7
print(f"[green] [+] Already Crawled : {website} | Thread : {th}[/green]")
continue
print(f"[green] [+] ReCrawling : {website} | Thread : {th} [/green]")
mal = None
lang_18 = None
lang = None
print(f"[green] [+] Started Crawling : {website} | Thread : {th}[/green]")
proxies = {}
if USE_PROXIES:
proxies = get_proxy()
try:
website_req = requests.get(website, headers = {"user-agent":"open crawler v 1.0.0"}, proxies = proxies, timeout = TIMEOUT)
try:
if not "html" in website_req.headers["Content-Type"]:
# checks if the site responds with html content or skips
print(f"[green] [+] Skiped : {website} Because Content type not 'html' | Thread : {th}[/green]")
continue
except:
continue
website_txt = website_req.text
if not update:
save_crawl(website, time.time(), 0,0,0,0,0,0,)
else:
update_crawl(website, time.time(), 0,0,0,0,0,0)
except:
# could be because website is down or the timeout
print(f"[red] [-] Coundn't Crwal : {website} | Thread : {th}[/red]")
save_crawl(website, time.time(), "ERROR OCCURED", 0, 0, 0, 0, 0)
continue
try:
lang = detect(website_txt)
except:
lang = "un-dic"
if URL_SCAN:
mal = scan_url(website)
website_txt_ = remove_html(website_txt)
if Scan_Bad_Words:
lang_18 = lang_d(website_txt_)
keywords = []
desc = ""
soup = BeautifulSoup(website_txt, 'html.parser')
for meta in soup.findAll("meta"):
try:
if meta["name"] == "keywords":
keywords = meta["content"]
except:
pass
try:
if meta["name"] == "description":
desc = meta["content"]
except:
pass
del soup
top_r = None
if Scan_Top_Keywords:
top_r = get_top_reccuring(website_txt_)
update_crawl(website, time.time(), mal, lang_18, lang, keywords, desc, top_r)
del mal, lang_18, lang, keywords, desc, top_r
sub_urls = []
for x in re.findall(url_extract_pattern, website_txt):
if re.match(url_pattern, x):
if ".onion" in x:
# skips onion sites
continue
if x[-1] == "/" or x.endswith(".html") or x.split("/")[-1].isalnum():
# tries to filture out not crawlable urls
sub_urls.append(x)
# removes all duplicates
sub_urls = set(sub_urls)
sub_urls = list(sub_urls)
# check for restrictions in robots.txt and filture out the urls found
for sub_url in sub_urls:
if if_waiting(sub_url):
sub_urls.remove(sub_url)
continue
site = sub_url.replace("https://", "")
site = site.replace("http://", "")
domain = site.split("/")[0]
# print(f"[green] [+] Scans - {domain} for restrictions")
rp = urllib.robotparser.RobotFileParser()
rp.set_url("http://" + domain + "/robots.txt")
# a = get_robot(domain)
if not rp.can_fetch("*", sub_url):
sub_urls.remove(sub_url)
# restricted = robots_txt.disallowed(sub_url, proxies)
# t = sub_url.split("://")[1].split("/")
# t.remove(t[0])
# t_ = ""
# for u in t:
# t_ += "/" + u
# t = t_
# restricted = tuple(restricted)
# for resk in restricted:
# if t.startswith(resk):
# sub_urls.remove(sub_url)
# break
# check if there is a need of crawling
for e in sub_urls:
z__ = if_crawled(e)
y__ = z__[0]
t__ = z__[1]
if y__:
if int(t__) < int(time.time()) - 604800: # Re-Crawls Only After 7
sub_urls.remove(e)
continue
try:
website_req = requests.get(e, headers = {"user-agent":"open crawler v 1.0.0"}, proxies = proxies, timeout = TIMEOUT)
except:
sub_urls.remove(e)
continue
try:
if not "html" in website_req.headers["Content-Type"]:
print(f"[green] [+] Skiped : {e} Because Content type not 'html' | Thread : {th}[/green]")
sub_urls.remove(e)
continue
except:
sub_urls.remove(e)
continue
del proxies
write_to_wait_list(sub_urls)
del sub_urls
WEBSITE_SCANS.remove(website_url)
print(f"[green] [+] Crawled : {website} | Thread : {th}[/green]")
ascii_art = """
[medium_spring_green]
______ ______ __
/ \ / \ | \
| $$$$$$\ ______ ______ _______ | $$$$$$\ ______ ______ __ __ __ | $$
| $$ | $$ / \ / \ | \ | $$ \$$ / \ | \ | \ | \ | \| $$
| $$ | $$| $$$$$$\| $$$$$$\| $$$$$$$\ | $$ | $$$$$$\ \$$$$$$\| $$ | $$ | $$| $$
| $$ | $$| $$ | $$| $$ $$| $$ | $$ | $$ __ | $$ \$$/ $$| $$ | $$ | $$| $$
| $$__/ $$| $$__/ $$| $$$$$$$$| $$ | $$ | $$__/ \| $$ | $$$$$$$| $$_/ $$_/ $$| $$
\$$ $$| $$ $$ \$$ \| $$ | $$ \$$ $$| $$ \$$ $$ \$$ $$ $$| $$
\$$$$$$ | $$$$$$$ \$$$$$$$ \$$ \$$ \$$$$$$ \$$ \$$$$$$$ \$$$$$\$$$$ \$$
| $$
| $$
\$$ [bold]v 1.0.0[/bold] [/medium_spring_green]
"""
# for checking the memory usage uncomment @profile
# @profile
def main():
global DB
print(ascii_art)
# Initializes MongoDB
DB = connect_db(MONGODB_URI, MONGODB_PWD)
try:
primary_url = sys.argv[1]
except:
print("\n[blue] [?] Primary Url [You can skip this part but entering] :[/blue]", end="")
primary_url = input(" ")
print("")
if primary_url != "":
forced_crawl(primary_url)
print("")
# Starts threading
for th in range(0, MAX_THREADS):
t_d = threading.Thread(target=crawl, args=(th+1,))
t_d.daemon = True
t_d.start()
print(f"[spring_green1] [+] Started Thread : {th + 1}[/spring_green1]")
print("\n")
# while loop waiting for exit flag
while not EXIT_FLAG:
time.sleep(0.5)
if __name__ == "__main__":
main()