author | Edouard Tisserant |
Fri, 25 Jan 2019 14:06:11 +0100 | |
changeset 2483 | 6a7f92b84855 |
parent 2465 | 47d3aea2be30 |
child 2487 | 6a4f9a061994 |
permissions | -rw-r--r-- |
2463
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
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#!/usr/bin/env python |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
2 |
# -*- coding: utf-8 -*- |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
3 |
|
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
4 |
# See COPYING file for copyrights details. |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
5 |
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8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
6 |
import md5 |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
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8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
8 |
class ConnectorBase(object): |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
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2465 | 10 |
#chuncksize = 16384 |
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chuncksize = 1024*1024 |
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2463
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
12 |
def BlobFromFile(self, filepath): |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
13 |
s = md5.new() |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
14 |
blobID = s.digest() # empty md5, to support empty blob |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
15 |
with open(filepath, "rb") as f: |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
16 |
while True: |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
17 |
chunk = f.read(self.chuncksize) |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
18 |
if len(chunk) == 0: return blobID |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
19 |
blobID = self.AppendChunkToBlob(chunk, blobID) |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
20 |
s.update(chunk) |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
21 |
if blobID != s.digest(): return None |
8742337a9fe3
Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
Edouard Tisserant
parents:
diff
changeset
|
22 |