/usr/lib/python2.7/dist-packages/requestbuilder/response.py is in python-requestbuilder 0.5.2-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | # Copyright (c) 2013-2015, Eucalyptus Systems, Inc.
#
# Permission to use, copy, modify, and/or distribute this software for
# any purpose with or without fee is hereby granted, provided that the
# above copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
class PaginatedResponse(dict):
def __init__(self, request, pages, item_names):
assert len(pages) > 0
self.iter_cache = dict((key, []) for key in item_names)
self.request = request
self.stack = list(reversed(pages))
self.fetch_next_page() # get an initial response
for key in self.iter_cache:
self[key] = ResponseItemGenerator(key, self)
def fetch_next_page(self):
if len(self.stack) == 0:
raise StopIteration()
page = self.stack.pop()
self.request.prepare_for_page(page)
response = self.request.send()
next_page = self.request.get_next_page(response)
for key in self.iter_cache:
self.iter_cache[key].extend(response.pop(key, []) or [])
if next_page is not None:
# Need to ask for another page of results later
self.stack.append(next_page)
self.update(response)
class ResponseItemGenerator(object):
def __init__(self, item_name, response_dict):
self.item_name = item_name
self.response_dict = response_dict
def next(self):
if len(self.response_dict.iter_cache[self.item_name]) == 0:
self.response_dict.fetch_next_page()
if len(self.response_dict.iter_cache[self.item_name]) == 0:
raise StopIteration()
return self.response_dict.iter_cache[self.item_name].pop(0)
def __iter__(self):
return self
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