| # Copyright (C) 2011 Google Inc. All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: |
| # |
| # * Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # * Redistributions in binary form must reproduce the above |
| # copyright notice, this list of conditions and the following disclaimer |
| # in the documentation and/or other materials provided with the |
| # distribution. |
| # * Neither the name of Google Inc. nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| import gzip |
| |
| import six |
| from six.moves import urllib |
| |
| from blinkpy.common.net.network_transaction import NetworkTransaction |
| |
| |
| class Web(object): |
| class _HTTPRedirectHandler2(urllib.request.HTTPRedirectHandler): # pylint:disable=no-init |
| """A subclass of HTTPRedirectHandler to support 308 Permanent Redirect.""" |
| |
| def http_error_308(self, req, fp, code, msg, headers): # pylint:disable=unused-argument |
| # We have to override the code to 301 (Moved Permanently); |
| # otherwise, HTTPRedirectHandler will throw a HTTPError. |
| return self.http_error_301(req, fp, 301, msg, headers) |
| |
| def get_binary(self, url, return_none_on_404=False): |
| def make_request(): |
| response = self.request('GET', |
| url, |
| headers={'Accept-Encoding': 'gzip'}) |
| if response.headers.get('Content-Encoding') == 'gzip': |
| # Wrap the HTTP response, which is not fully file-like. |
| # Unfortunately, `six` does not provide `io.BufferedRandom`, so |
| # we need to read the entire payload up-front (may pose a |
| # performance issue). |
| buf = six.BytesIO(response.read()) |
| gzip_decoder = gzip.GzipFile(fileobj=buf) |
| return gzip_decoder.read() |
| return response.read() |
| |
| return NetworkTransaction( |
| return_none_on_404=return_none_on_404).run(make_request) |
| |
| def request(self, method, url, data=None, headers=None): |
| opener = urllib.request.build_opener(Web._HTTPRedirectHandler2) |
| request = urllib.request.Request(url=url, data=data) |
| |
| request.get_method = lambda: method |
| |
| if headers: |
| for key, value in headers.items(): |
| request.add_header(key, value) |
| |
| return opener.open(request) |