Edouard@2463: #!/usr/bin/env python
Edouard@2463: # -*- coding: utf-8 -*-
Edouard@2463: 
Edouard@2463: # See COPYING file for copyrights details.
Edouard@2463: 
kinsamanka@3750: 
andrej@2540: import hashlib
Edouard@3861: from runtime import PlcStatus
Edouard@2463: 
edouard@2492: 
Edouard@2463: class ConnectorBase(object):
Edouard@2463: 
edouard@3884:     chuncksize = 0xfff # 4KB
edouard@2492: 
Edouard@3861:     PLCObjDefaults = {
Edouard@3861:         "StartPLC": False,
Edouard@3861:         "GetTraceVariables": (PlcStatus.Broken, None),
Edouard@3861:         "GetPLCstatus": (PlcStatus.Broken, None),
Edouard@3861:         "RemoteExec": (-1, "RemoteExec script failed!"),
Edouard@3861:         "GetVersions": "*** Unknown ***"
Edouard@3861:     }
Edouard@3861: 
Edouard@2487:     def BlobFromFile(self, filepath, seed):
andrej@2540:         s = hashlib.new('md5')
kinsamanka@3772:         s.update(seed.encode())
edouard@3808:         blobID = self.SeedBlob(seed.encode())
Edouard@2463:         with open(filepath, "rb") as f:
Edouard@2487:             while blobID == s.digest():
edouard@2492:                 chunk = f.read(self.chuncksize)
edouard@2492:                 if len(chunk) == 0:
edouard@2492:                     return blobID
Edouard@2463:                 blobID = self.AppendChunkToBlob(chunk, blobID)
Edouard@2463:                 s.update(chunk)
Edouard@2621:         raise IOError("Data corrupted during transfer or connection lost")