summaryrefslogtreecommitdiff
path: root/lib/chef/http/http_request.rb
blob: 1590537f191ed278374e86d8e5046d5218fb526b (plain)
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
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
#--
# Author:: Adam Jacob (<adam@chef.io>)
# Author:: Thom May (<thom@clearairturbulence.org>)
# Author:: Nuo Yan (<nuo@chef.io>)
# Author:: Christopher Brown (<cb@chef.io>)
# Author:: Christopher Walters (<cw@chef.io>)
# Author:: Daniel DeLeo (<dan@chef.io>)
# Copyright:: Copyright 2009-2016, 2010-2016 Chef Software, 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 "uri"
require "net/http"

# To load faster, we only want ohai's version string.
# However, in ohai before 0.6.0, the version is defined
# in ohai, not ohai/version
begin
  require "ohai/version" #used in user agent string.
rescue LoadError
  require "ohai"
end

require "chef/version"

class Chef
  class HTTP
    class HTTPRequest

      engine = defined?(RUBY_ENGINE) ? RUBY_ENGINE : "ruby"

      UA_COMMON = "/#{::Chef::VERSION} (#{engine}-#{RUBY_VERSION}-p#{RUBY_PATCHLEVEL}; ohai-#{Ohai::VERSION}; #{RUBY_PLATFORM}; +https://chef.io)"
      DEFAULT_UA = "Chef Client" << UA_COMMON

      USER_AGENT = "User-Agent".freeze

      ACCEPT_ENCODING = "Accept-Encoding".freeze
      ENCODING_GZIP_DEFLATE = "gzip;q=1.0,deflate;q=0.6,identity;q=0.3".freeze

      GET     = "get".freeze
      PUT     = "put".freeze
      POST    = "post".freeze
      DELETE  = "delete".freeze
      HEAD    = "head".freeze

      HTTPS = "https".freeze

      SLASH = "/".freeze

      HOST_LOWER = "host".freeze

      URI_SCHEME_DEFAULT_PORT = { "http"  => 80, "https" => 443 }.freeze

      def self.user_agent=(ua)
        @user_agent = ua
      end

      def self.user_agent
        @user_agent ||= DEFAULT_UA
      end

      attr_reader :method, :url, :headers, :http_client, :http_request

      def initialize(method, url, req_body, base_headers={})
        @method, @url = method, url
        @request_body = nil
        build_headers(base_headers)
        configure_http_request(req_body)
      end

      def host
        @url.hostname
      end

      def uri_safe_host
        @url.host
      end

      def port
        @url.port
      end

      def query
        @url.query
      end

      def path
        @url.path.empty? ? SLASH : @url.path
      end

      # DEPRECATED. Call request on an HTTP client object instead.
      def call
        hide_net_http_bug do
          http_client.request(http_request) do |response|
            yield response if block_given?
            response
          end
        end
      end

      def config
        Chef::Config
      end

      # DEPRECATED. Call request on an HTTP client object instead.
      def http_client
        @http_client ||= BasicClient.new(url).http_client
      end

      private

      def hide_net_http_bug
        yield
      rescue NoMethodError => e
        # http://redmine.ruby-lang.org/issues/show/2708
        # http://redmine.ruby-lang.org/issues/show/2758
        if e.to_s =~ /#{Regexp.escape(%q{undefined method `closed?' for nil:NilClass})}/
          Chef::Log.debug("Rescued error in http connect, re-raising as Errno::ECONNREFUSED to hide bug in net/http")
          Chef::Log.debug("#{e.class.name}: #{e}")
          Chef::Log.debug(e.backtrace.join("\n"))
          raise Errno::ECONNREFUSED, "Connection refused attempting to contact #{url.scheme}://#{host}:#{port}"
        else
          raise
        end
      end

      def build_headers(headers)
        @headers = headers.dup
        # No response compression unless we asked for it explicitly:
        @headers[HTTPRequest::ACCEPT_ENCODING] ||= "identity"
        @headers["X-Chef-Version"] = ::Chef::VERSION

        # Only include port in Host header when it is not the default port
        # for the url scheme (80;443) - Fixes CHEF-5355
        host_header = uri_safe_host.dup
        host_header << ":#{port}" unless URI_SCHEME_DEFAULT_PORT[@url.scheme] == port.to_i
        @headers["Host"] = host_header unless @headers.keys.any? {|k| k.downcase.to_s == HOST_LOWER }

        @headers
      end


      def configure_http_request(request_body=nil)
        req_path = "#{path}"
        req_path << "?#{query}" if query

        @http_request = case method.to_s.downcase
                        when GET
                          Net::HTTP::Get.new(req_path, headers)
                        when POST
                          Net::HTTP::Post.new(req_path, headers)
                        when PUT
                          Net::HTTP::Put.new(req_path, headers)
                        when DELETE
                          Net::HTTP::Delete.new(req_path, headers)
                        when HEAD
                          Net::HTTP::Head.new(req_path, headers)
                        else
                          raise ArgumentError, "You must provide :GET, :PUT, :POST, :DELETE or :HEAD as the method"
                        end

        @http_request.body = request_body if (request_body && @http_request.request_body_permitted?)
        # Optionally handle HTTP Basic Authentication
        if url.user
          user = URI.unescape(url.user)
          password = URI.unescape(url.password) if url.password
          @http_request.basic_auth(user, password)
        end

        # Overwrite default UA
        @http_request[USER_AGENT] = self.class.user_agent
      end

    end
  end
end