1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
# -*- coding: utf-8 -*-
#
# Extracts a file from a ZIP file, and saves it as the given file name.
#
# Author: Frank Steggink
#
from stetl.component import Config
from stetl.filter import Filter
from stetl.util import Util
from stetl.packet import FORMAT
log = Util.get_log('zipfileextractor')
BUFFER_SIZE = 1024 * 1024 * 1024
class ZipFileExtractor(Filter):
"""
Extracts a file from a ZIP file, and saves it as the given file name.
consumes=FORMAT.record, produces=FORMAT.string
"""
# Start attribute config meta
@Config(ptype=str, default=None, required=True)
def file_path(self):
"""
File name to write the extracted file to.
"""
pass
@Config(ptype=bool, default=True, required=False)
def delete_file(self):
"""
Delete the file when the chain has been completed?
"""
pass
# End attribute config meta
# Constructor
def __init__(self, configdict, section):
Filter.__init__(self, configdict, section, consumes=FORMAT.record, produces=FORMAT.string)
self.cur_file_path = self.cfg.get('file_path')
def invoke(self, packet):
if packet.data is None:
log.info("No file name given")
return packet
import zipfile
with zipfile.ZipFile(packet.data['file_path']) as z:
with open(self.cur_file_path, 'wb') as f:
with z.open(packet.data['name']) as zf:
while True:
buffer = zf.read(BUFFER_SIZE)
if not buffer:
break
f.write(buffer)
packet.data = self.cur_file_path
return packet
def after_chain_invoke(self, packet):
import os.path
if os.path.isfile(self.cur_file_path) and self.delete_file:
os.remove(self.cur_file_path)
return True
|
