84 lines
2.1 KiB
Python
84 lines
2.1 KiB
Python
|
from datetime import datetime
|
||
|
|
import boto
|
||
|
|
import botocore
|
||
|
|
from smart_open import smart_open
|
||
|
|
from common import Reader, Writer
|
||
|
|
import json
|
||
|
|
from common import Reader, Writer
|
||
|
|
|
||
|
|
class s3 :
|
||
|
|
"""
|
||
|
|
@TODO: Implement a search function for a file given a bucket??
|
||
|
|
"""
|
||
|
|
def __init__(self,args) :
|
||
|
|
"""
|
||
|
|
This function will extract a file or set of files from s3 bucket provided
|
||
|
|
@param access_key
|
||
|
|
@param secret_key
|
||
|
|
@param path location of the file
|
||
|
|
@param filter filename or filtering elements
|
||
|
|
"""
|
||
|
|
try:
|
||
|
|
self.s3 = boto.connect_s3(args['access_key'],args['secret_key'])
|
||
|
|
self.bucket = self.s3.get_bucket(args['bucket'].strip(),validate=False) if 'bucket' in args else None
|
||
|
|
# self.path = args['path']
|
||
|
|
self.filter = args['filter'] if 'filter' in args else None
|
||
|
|
self.filename = args['file'] if 'file' in args else None
|
||
|
|
|
||
|
|
except Exception as e :
|
||
|
|
self.s3 = None
|
||
|
|
self.bucket = None
|
||
|
|
print (e)
|
||
|
|
|
||
|
|
def buckets(self):
|
||
|
|
# def buckets(self):
|
||
|
|
pass
|
||
|
|
# """
|
||
|
|
# This function is a wrapper around the bucket list of buckets for s3
|
||
|
|
# """
|
||
|
|
# return self.s3.get_all_buckets()
|
||
|
|
|
||
|
|
|
||
|
|
class s3Reader(s3,Reader) :
|
||
|
|
"""
|
||
|
|
Because s3 contains buckets and files, reading becomes a tricky proposition :
|
||
|
|
- list files if file is None
|
||
|
|
- stream content if file is Not None
|
||
|
|
@TODO: support read from all buckets, think about it
|
||
|
|
"""
|
||
|
|
def __init__(self,args) :
|
||
|
|
s3.__init__(self,args)
|
||
|
|
def files(self):
|
||
|
|
r = []
|
||
|
|
try:
|
||
|
|
return [item.name for item in self.bucket if item.size > 0]
|
||
|
|
except Exception as e:
|
||
|
|
pass
|
||
|
|
return r
|
||
|
|
def stream(self,limit=-1):
|
||
|
|
"""
|
||
|
|
At this point we should stream a file from a given bucket
|
||
|
|
"""
|
||
|
|
key = self.bucket.get_key(self.filename.strip())
|
||
|
|
if key is None :
|
||
|
|
yield None
|
||
|
|
else:
|
||
|
|
count = 0
|
||
|
|
with smart_open(key) as remote_file:
|
||
|
|
for line in remote_file:
|
||
|
|
if count == limit and limit > 0 :
|
||
|
|
break
|
||
|
|
yield line
|
||
|
|
count += 1
|
||
|
|
def read(self,limit=-1) :
|
||
|
|
if self.filename is None :
|
||
|
|
#
|
||
|
|
# returning the list of files because no one file was specified.
|
||
|
|
return self.files()
|
||
|
|
else:
|
||
|
|
return self.stream(10)
|
||
|
|
|
||
|
|
class s3Writer(s3,Writer) :
|
||
|
|
def __init__(self,args) :
|
||
|
|
s3.__init__(self,args)
|