pyControl download_file

Steve: Wow this is odd - I'm getting some really puzzling results, all surrounding the chunk sizing. I can pull in and unpack an archive (mostly), but it's not complete. Here's the code, in the hopes that you or someone else can see an obvious error in my ways. If I tickle that chunk_size variable to 8k, 16k, 32, 64, etc. they all seem to return an different final file size. Weird.

 

!/bin/env python
import base64
import array
import binascii


def pc_downloader(b,remote_file,local_file):

    '''
    Handles downloading files via System.ConfigSync
    Args:
    b -- a pycontrol client object
    remote_file -- the name of the file to fetch from BigIP
    local_file -- the local file to write to.
    '''

    dl = b.System.ConfigSync
    local_file = open(local_file, 'ab')
    poll = True
    chunk_size = 8*1024
    foffset = 0
    a = array.array('c')

    while poll:
        res = dl.download_file('/var/tmp/test-ucs.tgz',chunk_size = chunk_size,file_offset = foffset)
        fdata = getattr(res,'return').file_data
        foffset = long(res.file_offset)
        chain_type = getattr(res, 'return').chain_type

        if (chain_type == 'FILE_LAST') or (chain_type == 'FILE_FIRST_AND_LAST'):
            poll = False
            local_file.close()
        else:
            local_file.write(binascii.a2b_base64(fdata))

if __name__ == '__main__':

    import pycontrol.pycontrol as pc
    b = pc.BIGIP(hostname='192.168.1.245',username='admin',password='admin',fromurl=True,wsdls=['System.ConfigSync'])
    pc_downloader(b,'/var/tmp/testucs.tgz','/var/tmp/testucs.tgz')

 

Give this a try and see if you get the same results. If so, I think it's worth opening a case.

 

-Matt