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Source code for galaxy.util.streamball

"""
A simple wrapper for writing tarballs as a stream.
"""
import logging
import os
import tarfile

from galaxy.exceptions import ObjectNotFound

log = logging.getLogger( __name__ )


[docs]class StreamBall( object ):
[docs] def __init__( self, mode, members=None ): self.members = members if members is None: self.members = [] self.mode = mode self.wsgi_status = None self.wsgi_headeritems = None
[docs] def add( self, file, relpath, check_file=False): if check_file and len(file) > 0: if not os.path.isfile(file): raise ObjectNotFound else: self.members.append( ( file, relpath ) ) else: self.members.append( ( file, relpath ) )
[docs] def stream( self, environ, start_response ): response_write = start_response( self.wsgi_status, self.wsgi_headeritems ) class tarfileobj: def write( self, *args, **kwargs ): response_write( *args, **kwargs ) tf = tarfile.open( mode=self.mode, fileobj=tarfileobj() ) for (file, rel) in self.members: tf.add( file, arcname=rel ) tf.close() return []
[docs]class ZipBall(object):
[docs] def __init__(self, tmpf, tmpd): self._tmpf = tmpf self._tmpd = tmpd
[docs] def stream(self, environ, start_response): response_write = start_response( self.wsgi_status, self.wsgi_headeritems ) tmpfh = open( self._tmpf ) response_write(tmpfh.read()) tmpfh.close() try: os.unlink( self._tmpf ) os.rmdir( self._tmpd ) except OSError: log.exception( "Unable to remove temporary library download archive and directory" ) return []