[wsgi] avoid reading the entire request body in memory
Import POST form handling code from
https://raw.github.com/defnull/multipart/master/multipart.py to avoid
reading arbitrary amounts of data from the network in memory.
NOTES:
- In the twisted case we limit the max request content-length to 100MB (by
default), which seems kind of arbitrary, but avoids this issue
- werkzeug.formparser has suitable code as well, but I don't know if we want to
add it as a dependency
from base64 import b64decode, b64encode
try:
uri, newdn = __args__
except ValueError:
print 'USAGE: cubicweb-ctl shell <instance> ldap_change_base_dn.py -- <ldap source uri> <new dn>'
print
print 'you should not have updated your sources file yet'
olddn = repo.sources_by_uri[uri].config['user-base-dn']
assert olddn != newdn
raw_input("Ensure you've stopped the instance, type enter when done.")
for eid, extid in sql("SELECT eid, extid FROM entities WHERE source='%s'" % uri):
olduserdn = b64decode(extid)
newuserdn = olduserdn.replace(olddn, newdn)
if newuserdn != olduserdn:
print olduserdn, '->', newuserdn
sql("UPDATE entities SET extid='%s' WHERE eid=%s" % (b64encode(newuserdn), eid))
commit()
print 'you can now update the sources file to the new dn and restart the instance'