file_delete.py

#!/usr/bin/env python
from argparse import ArgumentParser
import os
import pycurl
import base64
import json

from Common import getConfig, getTemporaryPassword
from CurlCallback import Test


if __name__ == "__main__":

    cfg = getConfig( os.path.dirname(os.path.abspath(__file__)) + '/etc/config.ini' )

    parg = ArgumentParser(description='delete file object from a iRODS collection')

    ## positional arguments
    parg.add_argument('collection',
                      metavar = 'collection',
                      nargs   = 1,
                      help    = 'the collection')

    ## required arguments
    parg.add_argument('-p', '--path',
                      action  = 'store',
                      dest    = 'path',
                      default = '',
                      help    = 'specify the remote file path within the collection')

    ## optional arguments
    parg.add_argument('-c','--centre',
                      action  = 'store',
                      dest    = 'centre',
                      choices = ['dccn','dcc','dcn'],
                      default = 'dccn',
                      help    = 'specify the centre')

    parg.add_argument('-i','--institute',
                      action  = 'store',
                      dest    = 'institute',
                      choices = ['di'],
                      default = 'di',
                      help    = 'specify the institute')

    parg.add_argument('-u','--user',
                      action  = 'store',
                      dest    = 'user',
                      default = '',
                      help    = 'connect with specified iRODS account')

    args = parg.parse_args()

    accept_frsp  = 'application/json'
    base_url     = cfg.get('RESTFUL','http_endpt')
    http_request = 'DELETE'

    if args.user:
        passwd = getTemporaryPassword(args.user)
        auth = 'Authorization: Basic %s' % base64.b64encode("%s:%s" % (args.user, passwd))
    else:
        auth = 'Authorization: Basic %s' % base64.b64encode("%s:%s" % (cfg.get('iRODS','username'), cfg.get('iRODS','password')))

    resource = 'dataObject/rdm-tst/%s/%s/%s/%s' % (args.institute, args.centre, args.collection[0], args.path)
    ## several listing options
    force  = True
    params = []
    if force:
       params.append('force=True')

    dest_url = '?'.join([os.path.join(base_url, resource), '&'.join(params)])

    print 'sending %s to %s' % (http_request, dest_url)

    t = Test()
    c = pycurl.Curl()
    c.setopt(c.URL, dest_url)
    c.setopt(c.HEADERFUNCTION, t.header_callback)
    c.setopt(c.WRITEFUNCTION , t.body_callback)
    c.setopt(c.CUSTOMREQUEST , http_request)
    c.setopt(c.HTTPHEADER    , ['ACCEPT: %s' % accept_frsp, auth])
    c.perform()
    c.close()

    print t.header