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#--
# Author:: Adam Jacob (<adam@opscode.com>)
# Author:: Thom May (<thom@clearairturbulence.org>)
# Author:: Nuo Yan (<nuo@opscode.com>)
# Author:: Christopher Brown (<cb@opscode.com>)
# Author:: Christopher Walters (<cw@opscode.com>)
# Copyright:: Copyright (c) 2009, 2010 Opscode, Inc.
# 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 'tempfile'
require 'chef/http'
class Chef
class HTTP; end
class REST < HTTP; end
end
require 'chef/http/authenticator'
require 'chef/http/decompressor'
require 'chef/http/json_input'
require 'chef/http/json_to_model_output'
require 'chef/http/cookie_manager'
require 'chef/http/validate_content_length'
require 'chef/config'
require 'chef/exceptions'
require 'chef/platform/query_helpers'
require 'chef/http/remote_request_id'
class Chef
# == Chef::REST
# Chef's custom REST client with built-in JSON support and RSA signed header
# authentication.
class REST < HTTP
# Backwards compatibility for things that use
# Chef::REST::RESTRequest or its constants
RESTRequest = HTTP::HTTPRequest
attr_accessor :url, :cookies, :sign_on_redirect, :redirect_limit
attr_reader :authenticator
# Create a REST client object. The supplied +url+ is used as the base for
# all subsequent requests. For example, when initialized with a base url
# http://localhost:4000, a call to +get_rest+ with 'nodes' will make an
# HTTP GET request to http://localhost:4000/nodes
def initialize(url, client_name=Chef::Config[:node_name], signing_key_filename=Chef::Config[:client_key], options={})
signing_key_filename = nil if chef_zero_uri?(url)
options = options.dup
options[:client_name] = client_name
options[:signing_key_filename] = signing_key_filename
super(url, options)
@decompressor = Decompressor.new(options)
@authenticator = Authenticator.new(options)
@request_id = RemoteRequestID.new(options)
@middlewares << JSONInput.new(options)
@middlewares << JSONToModelOutput.new(options)
@middlewares << CookieManager.new(options)
@middlewares << @decompressor
@middlewares << @authenticator
@middlewares << @request_id
# ValidateContentLength should come after Decompressor
# because the order of middlewares is reversed when handling
# responses.
@middlewares << ValidateContentLength.new(options)
end
def signing_key_filename
authenticator.signing_key_filename
end
def auth_credentials
authenticator.auth_credentials
end
def client_name
authenticator.client_name
end
def signing_key
authenticator.raw_key
end
def sign_requests?
authenticator.sign_requests?
end
# Send an HTTP GET request to the path
#
# Using this method to +fetch+ a file is considered deprecated.
#
# === Parameters
# path:: The path to GET
# raw:: Whether you want the raw body returned, or JSON inflated. Defaults
# to JSON inflated.
def get(path, raw=false, headers={})
if raw
streaming_request(path, headers)
else
request(:GET, path, headers)
end
end
alias :get_rest :get
alias :delete_rest :delete
alias :post_rest :post
alias :put_rest :put
# Streams a download to a tempfile, then yields the tempfile to a block.
# After the download, the tempfile will be closed and unlinked.
# If you rename the tempfile, it will not be deleted.
# Beware that if the server streams infinite content, this method will
# stream it until you run out of disk space.
def fetch(path, headers={})
streaming_request(create_url(path), headers) {|tmp_file| yield tmp_file }
end
alias :api_request :request
# Do a HTTP request where no middleware is loaded (e.g. JSON input/output
# conversion) but the standard Chef Authentication headers are added to the
# request.
def raw_http_request(method, path, headers, data)
url = create_url(path)
method, url, headers, data = @authenticator.handle_request(method, url, headers, data)
method, url, headers, data = @request_id.handle_request(method, url, headers, data)
response, rest_request, return_value = send_http_request(method, url, headers, data)
response.error! unless success_response?(response)
return_value
rescue Exception => exception
log_failed_request(response, return_value) unless response.nil?
if exception.respond_to?(:chef_rest_request=)
exception.chef_rest_request = rest_request
end
raise
end
# Deprecated:
# Responsibilities of this method have been split up. The #http_client is
# now responsible for making individual requests, while
# #retrying_http_errors handles error/retry logic.
def retriable_http_request(method, url, req_body, headers)
rest_request = Chef::HTTP::HTTPRequest.new(method, url, req_body, headers)
Chef::Log.debug("Sending HTTP request via #{method} to #{url.host}:#{url.port}#{rest_request.path}")
retrying_http_errors(url) do
yield rest_request
end
end
# Customized streaming behavior; sets the accepted content type to "*/*"
# if not otherwise specified for compatibility purposes
def streaming_request(url, headers, &block)
headers["Accept"] ||= "*/*"
super
end
alias :retriable_rest_request :retriable_http_request
def follow_redirect
unless @sign_on_redirect
@authenticator.sign_request = false
end
super
ensure
@authenticator.sign_request = true
end
public :create_url
############################################################################
# DEPRECATED
############################################################################
def decompress_body(body)
@decompressor.decompress_body(body)
end
def authentication_headers(method, url, json_body=nil)
authenticator.authentication_headers(method, url, json_body)
end
end
end
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