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#
# Author:: Jesse Campbell (<hikeit@gmail.com>)
# Author:: Lamont Granquist (<lamont@chef.io>)
# Copyright:: Copyright 2013-2016, Jesse Campbell
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require "chef/http/simple"
require "chef/digester"
require "chef/provider/remote_file"
require "chef/provider/remote_file/cache_control_data"
class Chef
class Provider
class RemoteFile
class HTTP
attr_reader :uri
attr_reader :new_resource
attr_reader :current_resource
# Parse the uri into instance variables
def initialize(uri, new_resource, current_resource)
@uri = uri
@new_resource = new_resource
@current_resource = current_resource
end
def headers
conditional_get_headers.merge(new_resource.headers)
end
def conditional_get_headers
cache_control_headers = {}
if last_modified = cache_control_data.mtime and want_mtime_cache_control?
cache_control_headers["if-modified-since"] = last_modified
end
if etag = cache_control_data.etag and want_etag_cache_control?
cache_control_headers["if-none-match"] = etag
end
Chef::Log.debug("Cache control headers: #{cache_control_headers.inspect}")
cache_control_headers
end
def fetch
http = Chef::HTTP::Simple.new(uri, http_client_opts)
tempfile = http.streaming_request(uri, headers)
if tempfile
update_cache_control_data(tempfile, http.last_response)
tempfile.close
end
tempfile
end
private
def update_cache_control_data(tempfile, response)
cache_control_data.checksum = Chef::Digester.checksum_for_file(tempfile.path)
cache_control_data.mtime = last_modified_time_from(response)
cache_control_data.etag = etag_from(response)
cache_control_data.save
end
def cache_control_data
@cache_control_data ||= CacheControlData.load_and_validate(uri, current_resource.checksum)
end
def want_mtime_cache_control?
new_resource.use_last_modified
end
def want_etag_cache_control?
new_resource.use_etag
end
def last_modified_time_from(response)
response["last_modified"] || response["date"]
end
def etag_from(response)
response["etag"]
end
def http_client_opts
opts={}
# CHEF-3140
# 1. If it's already compressed, trying to compress it more will
# probably be counter-productive.
# 2. Some servers are misconfigured so that you GET $URL/file.tgz but
# they respond with content type of tar and content encoding of gzip,
# which tricks Chef::REST into decompressing the response body. In this
# case you'd end up with a tar archive (no gzip) named, e.g., foo.tgz,
# which is not what you wanted.
if uri.to_s =~ /gz$/
Chef::Log.debug("Turning gzip compression off due to filename ending in gz")
opts[:disable_gzip] = true
end
opts
end
end
end
end
end
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