Move cache code to its own file
continuous-integration/drone/push Build is failing
Details
continuous-integration/drone/push Build is failing
Details
parent
f2efd56e8f
commit
000a5cda7a
|
|
@ -0,0 +1,163 @@
|
|||
# This file is part of morss
|
||||
#
|
||||
# Copyright (C) 2013-2020 pictuga <contact@pictuga.com>
|
||||
#
|
||||
# This program is free software: you can redistribute it and/or modify it under
|
||||
# the terms of the GNU Affero General Public License as published by the Free
|
||||
# Software Foundation, either version 3 of the License, or (at your option) any
|
||||
# later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful, but WITHOUT
|
||||
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
||||
# FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
|
||||
# details.
|
||||
#
|
||||
# You should have received a copy of the GNU Affero General Public License along
|
||||
# with this program. If not, see <https://www.gnu.org/licenses/>.
|
||||
|
||||
import os
|
||||
import pickle
|
||||
import time
|
||||
import threading
|
||||
from collections import OrderedDict
|
||||
|
||||
CACHE_SIZE = int(os.getenv('CACHE_SIZE', 1000)) # max number of items in cache (default: 1k items)
|
||||
CACHE_LIFESPAN = int(os.getenv('CACHE_LIFESPAN', 60)) # how often to auto-clear the cache (default: 1min)
|
||||
|
||||
|
||||
class BaseCache:
|
||||
""" Subclasses must behave like a dict """
|
||||
|
||||
def trim(self):
|
||||
pass
|
||||
|
||||
def autotrim(self, delay=CACHE_LIFESPAN):
|
||||
# trim the cache every so often
|
||||
|
||||
self.trim()
|
||||
|
||||
t = threading.Timer(delay, self.autotrim)
|
||||
t.daemon = True
|
||||
t.start()
|
||||
|
||||
def __contains__(self, url):
|
||||
try:
|
||||
self[url]
|
||||
|
||||
except KeyError:
|
||||
return False
|
||||
|
||||
else:
|
||||
return True
|
||||
|
||||
|
||||
try:
|
||||
import sqlite3 # isort:skip
|
||||
except ImportError:
|
||||
pass
|
||||
|
||||
|
||||
class SQLiteCache(BaseCache):
|
||||
def __init__(self, filename=':memory:'):
|
||||
self.con = sqlite3.connect(filename, detect_types=sqlite3.PARSE_DECLTYPES, check_same_thread=False)
|
||||
|
||||
with self.con:
|
||||
self.con.execute('CREATE TABLE IF NOT EXISTS data (ky UNICODE PRIMARY KEY, data BLOB, timestamp INT)')
|
||||
self.con.execute('pragma journal_mode=WAL')
|
||||
|
||||
self.trim()
|
||||
|
||||
def __del__(self):
|
||||
self.con.close()
|
||||
|
||||
def trim(self):
|
||||
with self.con:
|
||||
self.con.execute('DELETE FROM data WHERE timestamp <= ( SELECT timestamp FROM ( SELECT timestamp FROM data ORDER BY timestamp DESC LIMIT 1 OFFSET ? ) foo )', (CACHE_SIZE,))
|
||||
|
||||
def __getitem__(self, key):
|
||||
row = self.con.execute('SELECT * FROM data WHERE ky=?', (key,)).fetchone()
|
||||
|
||||
if not row:
|
||||
raise KeyError
|
||||
|
||||
return row[1]
|
||||
|
||||
def __setitem__(self, key, data):
|
||||
with self.con:
|
||||
self.con.execute('INSERT INTO data VALUES (?,?,?) ON CONFLICT(ky) DO UPDATE SET data=?, timestamp=?', (key, data, time.time(), data, time.time()))
|
||||
|
||||
|
||||
try:
|
||||
import pymysql.cursors # isort:skip
|
||||
except ImportError:
|
||||
pass
|
||||
|
||||
|
||||
class MySQLCacheHandler(BaseCache):
|
||||
def __init__(self, user, password, database, host='localhost'):
|
||||
self.user = user
|
||||
self.password = password
|
||||
self.database = database
|
||||
self.host = host
|
||||
|
||||
with self.cursor() as cursor:
|
||||
cursor.execute('CREATE TABLE IF NOT EXISTS data (ky VARCHAR(255) NOT NULL PRIMARY KEY, data MEDIUMBLOB, timestamp INT)')
|
||||
|
||||
self.trim()
|
||||
|
||||
def cursor(self):
|
||||
return pymysql.connect(host=self.host, user=self.user, password=self.password, database=self.database, charset='utf8', autocommit=True).cursor()
|
||||
|
||||
def trim(self):
|
||||
with self.cursor() as cursor:
|
||||
cursor.execute('DELETE FROM data WHERE timestamp <= ( SELECT timestamp FROM ( SELECT timestamp FROM data ORDER BY timestamp DESC LIMIT 1 OFFSET %s ) foo )', (CACHE_SIZE,))
|
||||
|
||||
def __getitem__(self, key):
|
||||
cursor = self.cursor()
|
||||
cursor.execute('SELECT * FROM data WHERE ky=%s', (key,))
|
||||
row = cursor.fetchone()
|
||||
|
||||
if not row:
|
||||
raise KeyError
|
||||
|
||||
return row[1]
|
||||
|
||||
def __setitem__(self, key, data):
|
||||
with self.cursor() as cursor:
|
||||
cursor.execute('INSERT INTO data VALUES (%s,%s,%s) ON DUPLICATE KEY UPDATE data=%s, timestamp=%s',
|
||||
(key, data, time.time(), data, time.time()))
|
||||
|
||||
|
||||
class CappedDict(OrderedDict, BaseCache):
|
||||
def trim(self):
|
||||
if CACHE_SIZE >= 0:
|
||||
for i in range( max( len(self) - CACHE_SIZE , 0 )):
|
||||
self.popitem(False)
|
||||
|
||||
def __setitem__(self, key, data):
|
||||
# https://docs.python.org/2/library/collections.html#ordereddict-examples-and-recipes
|
||||
if key in self:
|
||||
del self[key]
|
||||
OrderedDict.__setitem__(self, key, data)
|
||||
|
||||
|
||||
if 'CACHE' in os.environ:
|
||||
if os.environ['CACHE'] == 'mysql':
|
||||
default_cache = MySQLCacheHandler(
|
||||
user = os.getenv('MYSQL_USER'),
|
||||
password = os.getenv('MYSQL_PWD'),
|
||||
database = os.getenv('MYSQL_DB'),
|
||||
host = os.getenv('MYSQL_HOST', 'localhost')
|
||||
)
|
||||
|
||||
elif os.environ['CACHE'] == 'sqlite':
|
||||
if 'SQLITE_PATH' in os.environ:
|
||||
path = os.getenv('SQLITE_PATH')
|
||||
|
||||
else:
|
||||
path = ':memory:'
|
||||
|
||||
default_cache = SQLiteCache(path)
|
||||
|
||||
else:
|
||||
default_cache = CappedDict()
|
||||
145
morss/crawler.py
145
morss/crawler.py
|
|
@ -20,7 +20,6 @@ import pickle
|
|||
import random
|
||||
import re
|
||||
import sys
|
||||
import threading
|
||||
import time
|
||||
import zlib
|
||||
from cgi import parse_header
|
||||
|
|
@ -29,6 +28,8 @@ from io import BytesIO, StringIO
|
|||
|
||||
import chardet
|
||||
|
||||
from .cache import default_cache
|
||||
|
||||
try:
|
||||
# python 2
|
||||
from urllib import quote
|
||||
|
|
@ -54,10 +55,6 @@ except NameError:
|
|||
basestring = unicode = str
|
||||
|
||||
|
||||
CACHE_SIZE = int(os.getenv('CACHE_SIZE', 1000)) # max number of items in cache (default: 1k items)
|
||||
CACHE_LIFESPAN = int(os.getenv('CACHE_LIFESPAN', 60)) # how often to auto-clear the cache (default: 1min)
|
||||
|
||||
|
||||
MIMETYPE = {
|
||||
'xml': ['text/xml', 'application/xml', 'application/rss+xml', 'application/rdf+xml', 'application/atom+xml', 'application/xhtml+xml'],
|
||||
'rss': ['application/rss+xml', 'application/rdf+xml', 'application/atom+xml'],
|
||||
|
|
@ -615,144 +612,6 @@ class CacheHandler(BaseHandler):
|
|||
https_response = http_response
|
||||
|
||||
|
||||
class BaseCache:
|
||||
""" Subclasses must behave like a dict """
|
||||
|
||||
def trim(self):
|
||||
pass
|
||||
|
||||
def autotrim(self, delay=CACHE_LIFESPAN):
|
||||
# trim the cache every so often
|
||||
|
||||
self.trim()
|
||||
|
||||
t = threading.Timer(delay, self.autotrim)
|
||||
t.daemon = True
|
||||
t.start()
|
||||
|
||||
def __contains__(self, url):
|
||||
try:
|
||||
self[url]
|
||||
|
||||
except KeyError:
|
||||
return False
|
||||
|
||||
else:
|
||||
return True
|
||||
|
||||
|
||||
try:
|
||||
import sqlite3 # isort:skip
|
||||
except ImportError:
|
||||
pass
|
||||
|
||||
|
||||
class SQLiteCache(BaseCache):
|
||||
def __init__(self, filename=':memory:'):
|
||||
self.con = sqlite3.connect(filename, detect_types=sqlite3.PARSE_DECLTYPES, check_same_thread=False)
|
||||
|
||||
with self.con:
|
||||
self.con.execute('CREATE TABLE IF NOT EXISTS data (ky UNICODE PRIMARY KEY, data BLOB, timestamp INT)')
|
||||
self.con.execute('pragma journal_mode=WAL')
|
||||
|
||||
self.trim()
|
||||
|
||||
def __del__(self):
|
||||
self.con.close()
|
||||
|
||||
def trim(self):
|
||||
with self.con:
|
||||
self.con.execute('DELETE FROM data WHERE timestamp <= ( SELECT timestamp FROM ( SELECT timestamp FROM data ORDER BY timestamp DESC LIMIT 1 OFFSET ? ) foo )', (CACHE_SIZE,))
|
||||
|
||||
def __getitem__(self, key):
|
||||
row = self.con.execute('SELECT * FROM data WHERE ky=?', (key,)).fetchone()
|
||||
|
||||
if not row:
|
||||
raise KeyError
|
||||
|
||||
return row[1]
|
||||
|
||||
def __setitem__(self, key, data):
|
||||
with self.con:
|
||||
self.con.execute('INSERT INTO data VALUES (?,?,?) ON CONFLICT(ky) DO UPDATE SET data=?, timestamp=?', (key, data, time.time(), data, time.time()))
|
||||
|
||||
|
||||
try:
|
||||
import pymysql.cursors # isort:skip
|
||||
except ImportError:
|
||||
pass
|
||||
|
||||
|
||||
class MySQLCacheHandler(BaseCache):
|
||||
def __init__(self, user, password, database, host='localhost'):
|
||||
self.user = user
|
||||
self.password = password
|
||||
self.database = database
|
||||
self.host = host
|
||||
|
||||
with self.cursor() as cursor:
|
||||
cursor.execute('CREATE TABLE IF NOT EXISTS data (ky VARCHAR(255) NOT NULL PRIMARY KEY, data MEDIUMBLOB, timestamp INT)')
|
||||
|
||||
self.trim()
|
||||
|
||||
def cursor(self):
|
||||
return pymysql.connect(host=self.host, user=self.user, password=self.password, database=self.database, charset='utf8', autocommit=True).cursor()
|
||||
|
||||
def trim(self):
|
||||
with self.cursor() as cursor:
|
||||
cursor.execute('DELETE FROM data WHERE timestamp <= ( SELECT timestamp FROM ( SELECT timestamp FROM data ORDER BY timestamp DESC LIMIT 1 OFFSET %s ) foo )', (CACHE_SIZE,))
|
||||
|
||||
def __getitem__(self, key):
|
||||
cursor = self.cursor()
|
||||
cursor.execute('SELECT * FROM data WHERE ky=%s', (key,))
|
||||
row = cursor.fetchone()
|
||||
|
||||
if not row:
|
||||
raise KeyError
|
||||
|
||||
return row[1]
|
||||
|
||||
def __setitem__(self, key, data):
|
||||
with self.cursor() as cursor:
|
||||
cursor.execute('INSERT INTO data VALUES (%s,%s,%s) ON DUPLICATE KEY UPDATE data=%s, timestamp=%s',
|
||||
(key, data, time.time(), data, time.time()))
|
||||
|
||||
|
||||
class CappedDict(OrderedDict, BaseCache):
|
||||
def trim(self):
|
||||
if CACHE_SIZE >= 0:
|
||||
for i in range( max( len(self) - CACHE_SIZE , 0 )):
|
||||
self.popitem(False)
|
||||
|
||||
def __setitem__(self, key, data):
|
||||
# https://docs.python.org/2/library/collections.html#ordereddict-examples-and-recipes
|
||||
if key in self:
|
||||
del self[key]
|
||||
OrderedDict.__setitem__(self, key, data)
|
||||
|
||||
|
||||
if 'CACHE' in os.environ:
|
||||
if os.environ['CACHE'] == 'mysql':
|
||||
default_cache = MySQLCacheHandler(
|
||||
user = os.getenv('MYSQL_USER'),
|
||||
password = os.getenv('MYSQL_PWD'),
|
||||
database = os.getenv('MYSQL_DB'),
|
||||
host = os.getenv('MYSQL_HOST', 'localhost')
|
||||
)
|
||||
|
||||
elif os.environ['CACHE'] == 'sqlite':
|
||||
if 'SQLITE_PATH' in os.environ:
|
||||
path = os.getenv('SQLITE_PATH')
|
||||
|
||||
else:
|
||||
path = ':memory:'
|
||||
|
||||
default_cache = SQLiteCache(path)
|
||||
|
||||
else:
|
||||
default_cache = CappedDict()
|
||||
|
||||
|
||||
if 'IGNORE_SSL' in os.environ:
|
||||
import ssl
|
||||
ssl._create_default_https_context = ssl._create_unverified_context
|
||||
|
|
|
|||
Loading…
Reference in New Issue