136 lines
4.6 KiB
Python
136 lines
4.6 KiB
Python
from configHandler import config
|
|
import pymongo
|
|
from datetime import date,datetime
|
|
import json
|
|
import os
|
|
import boto3
|
|
|
|
link_cache_system = config['config']['link_cache']
|
|
|
|
DYNAMO_CACHE_TBL=None
|
|
if link_cache_system=="dynamodb": # pragma: no cover
|
|
DYNAMO_CACHE_TBL=config['config']['table']
|
|
|
|
if link_cache_system == "json":
|
|
link_cache = {}
|
|
if not os.path.exists("links.json"):
|
|
with open("links.json", "w") as outfile:
|
|
default_link_cache = {}
|
|
json.dump(default_link_cache, outfile)
|
|
try:
|
|
f = open('links.json',)
|
|
link_cache = json.load(f)
|
|
except json.decoder.JSONDecodeError:
|
|
print(" ➤ [ X ] Failed to load cache JSON file. Creating new file.")
|
|
link_cache = {}
|
|
except FileNotFoundError:
|
|
print(" ➤ [ X ] Failed to load cache JSON file. Creating new file.")
|
|
link_cache = {}
|
|
finally:
|
|
f.close()
|
|
elif link_cache_system == "ram":
|
|
link_cache = {}
|
|
print("Your link_cache_system is set to 'ram' which is not recommended; this is only intended to be used for tests")
|
|
elif link_cache_system == "db":
|
|
client = pymongo.MongoClient(config['config']['database'], connect=False)
|
|
table = config['config']['table']
|
|
db = client[table]
|
|
elif link_cache_system == "dynamodb": # pragma: no cover
|
|
client = boto3.resource('dynamodb')
|
|
|
|
def serializeUnknown(obj):
|
|
if isinstance(obj, (datetime, date)):
|
|
return obj.isoformat()
|
|
raise TypeError ("Type %s not serializable" % type(obj))
|
|
|
|
def addVnfToLinkCache(video_link, vnf):
|
|
global link_cache
|
|
try:
|
|
if link_cache_system == "db":
|
|
out = db.linkCache.insert_one(vnf)
|
|
print(" ➤ [ + ] Link added to DB cache ")
|
|
return True
|
|
elif link_cache_system == "json":
|
|
link_cache[video_link] = vnf
|
|
with open("links.json", "w") as outfile:
|
|
json.dump(link_cache, outfile, indent=4, sort_keys=True, default=serializeUnknown)
|
|
return None
|
|
elif link_cache_system == "ram": # FOR TESTS ONLY
|
|
link_cache[video_link] = vnf
|
|
elif link_cache_system == "dynamodb": # pragma: no cover
|
|
vnf["ttl"] = int(vnf["ttl"].strftime('%s'))
|
|
table = client.Table(DYNAMO_CACHE_TBL)
|
|
table.put_item(
|
|
Item={
|
|
'tweet': video_link,
|
|
'vnf': vnf,
|
|
'ttl':vnf["ttl"]
|
|
}
|
|
)
|
|
print(" ➤ [ + ] Link added to dynamodb cache ")
|
|
return True
|
|
except Exception as e:
|
|
print(" ➤ [ X ] Failed to add link to DB cache")
|
|
print(e)
|
|
return None
|
|
|
|
def getVnfFromLinkCache(video_link):
|
|
global link_cache
|
|
if link_cache_system == "db":
|
|
collection = db.linkCache
|
|
vnf = collection.find_one({'tweet': video_link})
|
|
# print(vnf)
|
|
if vnf != None:
|
|
hits = ( vnf['hits'] + 1 )
|
|
print(" ➤ [ ✔ ] Link located in DB cache. " + "hits on this link so far: [" + str(hits) + "]")
|
|
query = { 'tweet': video_link }
|
|
change = { "$set" : { "hits" : hits } }
|
|
out = db.linkCache.update_one(query, change)
|
|
return vnf
|
|
else:
|
|
print(" ➤ [ X ] Link not in DB cache")
|
|
return None
|
|
elif link_cache_system == "json":
|
|
if video_link in link_cache:
|
|
print("Link located in json cache")
|
|
vnf = link_cache[video_link]
|
|
return vnf
|
|
else:
|
|
print(" ➤ [ X ] Link not in json cache")
|
|
return None
|
|
elif link_cache_system == "dynamodb": # pragma: no cover
|
|
table = client.Table(DYNAMO_CACHE_TBL)
|
|
response = table.get_item(
|
|
Key={
|
|
'tweet': video_link
|
|
}
|
|
)
|
|
if 'Item' in response:
|
|
print("Link located in dynamodb cache")
|
|
vnf = response['Item']['vnf']
|
|
return vnf
|
|
else:
|
|
print(" ➤ [ X ] Link not in dynamodb cache")
|
|
return None
|
|
elif link_cache_system == "ram": # FOR TESTS ONLY
|
|
if video_link in link_cache:
|
|
print("Link located in json cache")
|
|
vnf = link_cache[video_link]
|
|
return vnf
|
|
else:
|
|
print(" ➤ [ X ] Link not in cache")
|
|
return None
|
|
elif link_cache_system == "none":
|
|
return None
|
|
|
|
def clearCache():
|
|
global link_cache
|
|
# only intended for use in tests
|
|
if link_cache_system == "ram":
|
|
link_cache={}
|
|
|
|
def setCache(value):
|
|
global link_cache
|
|
# only intended for use in tests
|
|
if link_cache_system == "ram":
|
|
link_cache=value |