merge
This commit is contained in:
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e06ef64c8f
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mongo/Dockerfile
Normal file
7
mongo/Dockerfile
Normal file
@ -0,0 +1,7 @@
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FROM python:3.9
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RUN mkdir /app
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COPY requirements.txt /app
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RUN pip install -r /app/requirements.txt
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COPY *.py /app
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WORKDIR /app
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ENTRYPOINT ["python", "./mongocrawler.py"]
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@ -18,11 +18,12 @@ import re
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import time
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import collections
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import math
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import json
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import random
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import hashlib
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LANGUAGE= os.getenv("SUCKER_LANGUAGE","sk")
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DOMAIN = os.getenv("SUCKER_DOMAIN","sk")
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BATCHSIZE=os.getenv("SUCKER_BATCHSIZE",10)
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BATCHSIZE=int(os.getenv("SUCKER_BATCHSIZE","10"))
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CONNECTION=os.getenv("SUCKER_CONNECTION","mongodb://root:example@localhost:27017/")
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DBNAME=os.getenv("SUCKER_DBNAME","crawler")
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MINFILESIZE=300
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@ -32,17 +33,15 @@ CHECK_PARAGRAPH_SIZE=150
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TEXT_TRASH_SIZE=200
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TEXT_TRASH_RATIO=0.6
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def put_queue(db,channel,message):
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queuecol = db["queue"]
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queuecol.insert_one({"channel":channel,"message":message,"created_at":datetime.utcnow(),"started_at":None})
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def reserve_queue(db,channel,message):
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queuecol = db["queue"]
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r = queuecol.find_one_and_delete({"channel":channel},sort={"created_at":-1})
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def delete_queue(db,channel):
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queuecol = db["queue"]
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pass
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def split_train(res):
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trainset = []
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testset = []
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for i,item in enumerate(res):
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if i % 10 == 0:
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testset.append(item)
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else:
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trainset.append(item)
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return trainset,testset
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def calculate_checksums(text):
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"""
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@ -102,39 +101,34 @@ def get_link_doc(link,status="frontlink"):
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return {"url":link,"host":host,"domain":domain,"status":status,"created_at":datetime.utcnow()}
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def fetch_pages(link_batch):
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htmls = []
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#print(link_batch)
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#print("zzzzzzzzzz")
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for link in link_batch:
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print("fetching:::::")
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print(link)
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final_link = link
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response = trafilatura.fetch_url(link,decode=False)
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time.sleep(2)
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html = None
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if response is not None :
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good = True
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if response.status != 200:
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good = False
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LOGGER.error('not a 200 response: %s for URL %s', response.status, url)
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elif response.data is None or len(response.data) < MINFILESIZE:
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LOGGER.error('too small/incorrect for URL %s', link)
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good = False
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# raise error instead?
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elif len(response.data) > MAXFILESIZE:
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good = False
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LOGGER.error('too large: length %s for URL %s', len(response.data), link)
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if good:
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html = trafilatura.utils.decode_response(response)
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final_link = response.url
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if html is not None:
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html, final_link = trafilatura.spider.refresh_detection(html, final_link)
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# is there a meta-refresh on the page?
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if final_link is None: # malformed or malicious content
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html = None
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htmls.append((final_link,html))
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return htmls
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def fetch_page(link):
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print("fetching:::::")
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print(link)
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final_link = link
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response = trafilatura.fetch_url(link,decode=False)
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time.sleep(2)
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html = None
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if response is not None :
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good = True
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if response.status != 200:
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good = False
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LOGGER.error('not a 200 response: %s for URL %s', response.status, url)
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elif response.data is None or len(response.data) < MINFILESIZE:
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LOGGER.error('too small/incorrect for URL %s', link)
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good = False
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# raise error instead?
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elif len(response.data) > MAXFILESIZE:
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good = False
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LOGGER.error('too large: length %s for URL %s', len(response.data), link)
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if good:
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html = trafilatura.utils.decode_response(response)
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final_link = response.url
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if html is not None:
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html, final_link = trafilatura.spider.refresh_detection(html, final_link)
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# is there a meta-refresh on the page?
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if final_link is None: # malformed or malicious content
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html = None
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return final_link,html
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def fetch_robot(base_url):
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try:
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@ -186,6 +180,7 @@ def index_pages(db,hostname,extracted_pages):
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text = doc["text"]
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checksums,sizes = calculate_checksums(text)
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doc["text_size"] = len(text)
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doc["text_md5"] = hashlib.md5(text.encode("utf8")).hexdigest()
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doc["paragraph_checksums"] = checksums
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doc["paragraph_sizes"] = sizes
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goodsz = sum(sizes)
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@ -214,6 +209,7 @@ def index_pages(db,hostname,extracted_pages):
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htdoc = get_link_doc(link,state)
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htdoc["html"] = html
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htdoc["html_size"] = len(html)
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htdoc["html_md5"]= hashlib.md5(html.encode("utf8")).hexdigest()
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# can be revisited - upsert
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del htdoc["url"]
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htmlcol.update_one({"url":link},{"$set":htdoc},upsert=True)
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@ -227,7 +223,7 @@ def index_pages(db,hostname,extracted_pages):
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checkcol.insert_one({"_id":chs})
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except pymongo.errors.DuplicateKeyError as err:
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pass
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linkcol.update_one({"url":original_link},{"$set":{"status":state}})
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linkcol.update_one({"url":link},{"$set":{"status":state}})
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def extract_links(link_batch,responses,hostname,rules,default_status="frontlink"):
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@ -263,23 +259,27 @@ def index_links(db,extracted_links):
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for link,status in extracted_links:
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if not is_link_good(link):
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continue
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doc = get_link_doc(link,status)
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try:
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linkcol.insert_one(doc)
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except pymongo.errors.DuplicateKeyError as ex:
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pass
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if status == "frontlink" or status == "backlink":
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doc = get_link_doc(link,status)
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try:
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linkcol.insert_one(doc)
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# dont overwrite
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except pymongo.errors.DuplicateKeyError as ex:
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pass
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else:
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print("updating " + link,status)
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linkcol.update_one({"url":link},{"$set":{"status":status,"updated_at":datetime.utcnow()}})
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def get_link_features(link):
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a, urlpath = courlan.get_host_and_path(link)
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features = re.split("[/?&]",urlpath)
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#features = re.split("[/?-_=]",urlpath)
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res = []
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for feature in features:
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for i,feature in enumerate(features):
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if len(feature) < 1:
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continue
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if feature.isdigit():
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feature = "<NUM>"
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res.append(feature)
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feature = re.sub("[0-9]","*",feature)
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res.append(str(i)+ "-" + feature)
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if len(res) < 2:
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return None
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res = res[:-1]
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@ -295,20 +295,14 @@ class LinkClassifier:
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self.bad_count = 0
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self.alpha = 0.001
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def train(self,db,hostname):
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linkcol = db["links"]
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res = linkcol.find({"host":hostname,"status": {"$not":{"$in":["frontlink","backlink"]}}})
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testset = []
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for i,item in enumerate(res):
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def train(self,links):
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for i,item in enumerate(links):
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link = item["url"]
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state = item["status"]
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cl = 0
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if state == "good":
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cl = 1
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print(cl,state,link)
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if i % 10 == 1:
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testset.append((link,cl))
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continue
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features = get_link_features(link)
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if features is None:
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continue
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@ -323,22 +317,42 @@ class LinkClassifier:
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self.badcounter[feature] += 1
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self.bdictsize = len(self.badcounter)
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self.gdictsize = len(self.goodcounter)
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def test(self,testset):
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# eval
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gg = 0
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for l,cl in testset:
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true_positive = 0
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positive = 0
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false_negative = 0
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for item in testset:
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l = item["url"]
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cl = 0
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if item["status"] == "good":
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cl = 1
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pcp = self.classify(l)
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r = 0
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if pcp > 0:
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r = 1
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if cl == 1:
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if r == 1:
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true_positive += 1
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positive += 1
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if r == 1 and cl == 0:
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false_negative += 1
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if r == cl:
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gg += 1
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else:
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print("MISS",l,cl,pcp)
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print("Accuracy:")
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print(len(testset))
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print(gg / len(testset))
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print("Precision: {}, Recall: {}".format(true_positive/positive,true_positive/(true_positive+false_negative)))
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print("Accuracy:")
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acc = gg / len(testset)
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print(acc)
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return acc
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def classify(self,link):
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if self.good_count == 0 or self.bad_count == 0:
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return random.uniform(-0.1,0.1)
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features = get_link_features(link)
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res = 0
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gp = math.log(self.good_count) - math.log(self.good_count + self.bad_count)
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@ -355,59 +369,20 @@ class LinkClassifier:
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b = math.log(self.badcounter[feature] + self.alpha) - bcc
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badprob += b
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print(feature,g,b)
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if (goodprob + gp) > (badprob + bp):
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#if goodprob > badprob:
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res = 1
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pa = math.exp(goodprob + gp)
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pb = math.exp(badprob + bp)
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return pa - pb
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return pa - pb #+ random.uniform(-0.001,0.001)
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def get_links(db,hostname,status,batch_size):
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linkcol = db["links"]
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# count downloaded links
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res = linkcol.aggregate([
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{ "$match": { "status": {"$not":{"$in":["frontlink","backlink"]}},"host":hostname } },
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{"$group":{"_id":None,
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"count":{"$count":{}},
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}
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},
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])
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links = set()
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out = list(res)
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if len(out) == 0:
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return list()
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if out[0]["count"] < 200:
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#res = linkcol.find({"status":status,"host":hostname},{"url":1},limit=batch_size)
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# get random links
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res = linkcol.aggregate([
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{ "$match": { "status": status,"host":hostname } },
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{ "$sample": { "size": batch_size } }
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])
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for i,doc in enumerate(res):
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#print(">>>>>" + status)
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#print(doc);
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links.add(doc["url"])
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if i >= batch_size:
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break
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else:
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cl = LinkClassifier()
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cl.train(db,hostname)
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res = linkcol.aggregate([
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{ "$match": { "status": status,"host":hostname } },
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{ "$sample": { "size": batch_size * 100 } }
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])
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outlinks = []
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for i,doc in enumerate(res):
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#print(">>>>>" + status)
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#print(doc);
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link = doc["url"]
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outlinks.append((doc["url"],cl.classify(link)))
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outlinks = sorted(outlinks, key=lambda x: x[1],reverse=True)
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links = [l[0] for l in outlinks[0:batch_size]]
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# todo remove very bad links from database
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return list(links)
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res = linkcol.find({"host":hostname,"status":status},limit=batch_size)
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links = []
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for item in res:
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links.append(item["url"])
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print("Got {} {}".format(len(links),status))
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return links
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def fetch_sitemap_links(start_link):
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@ -415,42 +390,53 @@ def fetch_sitemap_links(start_link):
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navigation_links = trafilatura.sitemaps.sitemap_search(start_link,target_lang=LANGUAGE)
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for link in navigation_links:
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out.append((link,"frontlink"))
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print("Fetched {} sitemap links".format(len(out)))
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return out
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def process_links(db,hostname,status,links=[],rules=None,batch_size=BATCHSIZE):
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#print(links)
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responses = fetch_pages(links)
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#print(responses)
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extracted_pages = extract_pages(links,responses)
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#print(extracted_pages)
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extracted_links = extract_links(links,responses,hostname,rules,status)
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#print(extracted_links)
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index_links(db,extracted_links)
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index_pages(db,hostname,extracted_pages)
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def fetch_front_links(start_link,rules):
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start_link,hostname = courlan.check_url(start_link)
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response = fetch_page(start_link)
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extracted_links = extract_links([start_link],[response],hostname,rules,"frontlink")
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print("Fetched {} frontlinks".format(len(extracted_links)))
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return extracted_links
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def link_summary(db,hostname):
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linkcol = db["links"]
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#res = linkcol.distinct("hostname",{"hostname":hostname})
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# count links
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res = linkcol.aggregate([
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{"$match":{"host":hostname}},
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{"$group":{"_id":"$status","count":{"$sum":1}}},
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{"$group":{"_id":"$status",
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"count":{"$count":{}},
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}
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},
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])
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badcount = 0
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goodcount = 0
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out = ["good","frontlink","backlink"]
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info = {}
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crawled_count = 0
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bad_crawl_count = 0
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for item in res:
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if item["_id"] not in out:
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badcount += item["count"]
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if item["_id"] == "good":
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goodcount = item["count"]
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info[item["_id"]] = item["count"]
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good_prob = goodcount / (goodcount + badcount)
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count = item["count"]
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st = item["_id"]
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print(st,count)
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if st == "good":
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goodcount += count
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if st != "frontlink" and st != "backlink":
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crawled_count += count
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if st != "good":
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bad_crawl_count += count
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info[st] = count
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info["crawled_count"] = crawled_count
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info["bad_crawl_count"] = bad_crawl_count
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baclink_cout = 0
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if "backlink" in info:
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backlink_count = info["backlink"]
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good_prob= 0
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if crawled_count > 0:
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good_prob = goodcount / crawled_count
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info["good_prob"] = good_prob
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info["bad_documents"] = badcount
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print(">>>Domain Content")
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contentcol = db["content"]
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res = contentcol.aggregate([
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@ -465,34 +451,57 @@ def link_summary(db,hostname):
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for item in res:
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text_size = item["text_size_sum"]
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good_document_characters = 0
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fetch_average_characters = 0
|
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if goodcount > 0:
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good_document_characters = text_size / goodcount
|
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fetch_average_characters = text_size / (goodcount + badcount)
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fetch_average_characters = text_size / crawled_count
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info["total_good_characters"] = text_size
|
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info["average_good_characters"] = good_document_characters
|
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info["average_fetch_characters"] = fetch_average_characters
|
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domaincol = db["domain"]
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if goodcount + badcount > 100:
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cl = LinkClassifier()
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cl.train(db,hostname)
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res = linkcol.aggregate([
|
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{ "$match": { "status": "backlink","host":hostname } },
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{ "$sample": { "size": BATCHSIZE * 100 } }
|
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])
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predicted_good = 0
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predicted_bad = 0
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domaincol.update_one({"host":hostname},{"$set":info},upsert=True)
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res = domaincol.find_one({"host":hostname})
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print(res)
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def sample_links(db,hostname,status,batch_size):
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print("Getting backlinks")
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linkcol = db["links"]
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res = linkcol.find({"host":hostname,"status": {"$not":{"$in":["frontlink","backlink"]}}})
|
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cl = LinkClassifier()
|
||||
crawled_links = list(res)
|
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crawled_count = len(crawled_links)
|
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prediction_accuracy = 0
|
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if crawled_count > 200:
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||||
# train on crawled links
|
||||
trainset,testset = split_train(crawled_links)
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cl.train(trainset)
|
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prediction_accuracy = cl.test(testset)
|
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sample_set_size = 10000
|
||||
res = linkcol.find({"host":hostname,"status": status},limit = sample_set_size)
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sample_links = []
|
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predicted_good = 0
|
||||
for item in res:
|
||||
for item in res:
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||||
cll = cl.classify(item["url"])
|
||||
#cll += random.uniform(-0.1,0.1)
|
||||
sample_links.append((item["url"],cll))
|
||||
if cll > 0:
|
||||
predicted_good += 1
|
||||
else:
|
||||
predicted_bad += 1
|
||||
predicted_good_prob = 0
|
||||
if predicted_good + predicted_bad > 0:
|
||||
predicted_good_prob = predicted_good / (predicted_good + predicted_bad)
|
||||
info["predicted_good_prob"] = predicted_good_prob
|
||||
# TODO frontlinks are not unique!
|
||||
sample_links.sort(key=lambda x: x[1],reverse=True)
|
||||
predicted_good_prob = 0
|
||||
if len(sample_links) > 0:
|
||||
predicted_good_prob = predicted_good / len(sample_links)
|
||||
domaincol = db["domain"]
|
||||
info = {
|
||||
"predicted_good_prob":predicted_good_prob,
|
||||
"prediction_accuracy": prediction_accuracy,
|
||||
"crawled_count": crawled_count,
|
||||
}
|
||||
print(info)
|
||||
domaincol.update_one({"host":hostname},{"$set":info},upsert=True)
|
||||
domaincol.update_one({"host":hostname},{"$set":info})
|
||||
links = [l[0] for l in sample_links[0:batch_size]]
|
||||
return links
|
||||
|
||||
def domain_summary(db,hostname):
|
||||
linkcol = db["links"]
|
||||
@ -517,13 +526,16 @@ def createdb():
|
||||
linkcol.create_index("url",unique=True)
|
||||
linkcol.create_index("host")
|
||||
contentcol = db["content"]
|
||||
contentcol.create_index("url",unique=True)
|
||||
contentcol.create_index("url")
|
||||
contentcol.create_index("text_md5",unique=True)
|
||||
#contentcol.create_index({"paragraph_checksums":1})
|
||||
contentcol.create_index("host")
|
||||
htmlcol = db["html"]
|
||||
htmlcol.create_index("url",unique=True)
|
||||
htmlcol.create_index("url")
|
||||
htmlcol.create_index("html_md5",unique=True)
|
||||
domaincol = db["domains"]
|
||||
domaincol.create_index("host",unique=True)
|
||||
domaincol.create_index("average_fetch_characters",unique=True)
|
||||
|
||||
@cli.command()
|
||||
@click.argument("link")
|
||||
@ -563,7 +575,12 @@ def classify(start_link):
|
||||
db=myclient[DBNAME]
|
||||
start_link,hostname = courlan.check_url(start_link)
|
||||
cl = LinkClassifier()
|
||||
cl.train(db,hostname)
|
||||
linkcol = db["links"]
|
||||
res = linkcol.find({"host":hostname,"status": {"$not":{"$in":["frontlink","backlink"]}}})
|
||||
trainset, testset = split_train(res)
|
||||
|
||||
cl.train(trainset)
|
||||
cl.test(testset)
|
||||
|
||||
@cli.command()
|
||||
@click.argument("start_link")
|
||||
@ -572,23 +589,25 @@ def visit(start_link):
|
||||
db=myclient[DBNAME]
|
||||
start_link,hostname = courlan.check_url(start_link)
|
||||
batch_size = BATCHSIZE
|
||||
|
||||
print("Getting frontlinks")
|
||||
links = get_links(db,hostname,"frontlink",batch_size)
|
||||
print(f"Got {len(links)} frontlinks")
|
||||
if len(links) < batch_size:
|
||||
print("Fetching sitemap links")
|
||||
sitemap_links = fetch_sitemap_links(start_link)
|
||||
index_links(db,sitemap_links)
|
||||
links = get_links(db,hostname,"frontlink",batch_size)
|
||||
links.insert(0,start_link)
|
||||
if len(links) < batch_size:
|
||||
back_links = get_links(db,hostname,"backlink",batch_size - len(links))
|
||||
links += back_links
|
||||
|
||||
print("Processing links")
|
||||
rules = fetch_robot(hostname)
|
||||
responses = fetch_pages(links)
|
||||
# renew front links
|
||||
sitemap_links = fetch_sitemap_links(start_link)
|
||||
index_links(db,sitemap_links)
|
||||
front_links = fetch_front_links(start_link,rules)
|
||||
index_links(db,front_links)
|
||||
# start crawling
|
||||
# frontlinks first
|
||||
links = sample_links(db,hostname,"frontlink",batch_size)
|
||||
links.insert(0,start_link)
|
||||
# then backlinks
|
||||
if len(links) < batch_size:
|
||||
back_links = sample_links(db,hostname,"backlink",batch_size - len(links))
|
||||
links += back_links
|
||||
# index results
|
||||
print("Processing links")
|
||||
responses = []
|
||||
for link in links:
|
||||
responses.append(fetch_page(link))
|
||||
extracted_pages = extract_pages(links,responses)
|
||||
extracted_links = extract_links(links,responses,hostname,rules,"backlink")
|
||||
index_links(db,extracted_links)
|
||||
@ -8,3 +8,18 @@ mycol = mydb["customers"]
|
||||
mydict = {"text":"ahoj svet"}
|
||||
|
||||
x = mycol.insert_one(mydict)
|
||||
|
||||
def createdb():
|
||||
myclient = pymongo.MongoClient(CONNECTION)
|
||||
db=myclient[DBNAME]
|
||||
linkcol = db["links"]
|
||||
linkcol.create_index("url",unique=True)
|
||||
linkcol.create_index("host")
|
||||
contentcol = db["content"]
|
||||
contentcol.create_index("url",unique=True)
|
||||
#contentcol.create_index({"paragraph_checksums":1})
|
||||
contentcol.create_index("host")
|
||||
htmlcol = db["html"]
|
||||
htmlcol.create_index("url")
|
||||
domaincol = db["domains"]
|
||||
domaincol.create_index("host",unique=True)
|
||||
|
||||
@ -1,2 +1,7 @@
|
||||
trafilatura
|
||||
py3langid
|
||||
courlan
|
||||
pymongo
|
||||
click
|
||||
lxml
|
||||
rq
|
||||
|
||||
Loading…
Reference in New Issue
Block a user