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
|
# Copyright 2011-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file 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.
module AWS
module Core
# Given a hash of request options, a REST::RequestHandler can
# populate a Core::Http::Request object.
class RESTRequestBuilder
# @api private
def initialize operation, options = {}
@http = operation[:http]
@rules = operation[:inputs]
@validator = Options::Validator.new(@rules)
@serializer =
case options[:format]
when :xml
namespace = options[:xmlnamespace]
name = operation[:name]
Options::XMLSerializer.new(namespace, name, operation)
when :json
Options::JSONSerializer.new(@rules, @http[:request_payload])
else
raise ArgumentError, "unhandled format: #{options[:format]}"
end
end
# Populates a Http::Request with the following:
#
# * HTTP method
# * URI
# * headers
# * body
#
# @param [Http::Request] request
#
# @param [Hash] params The hash of request options provided
# to the client request method. This will be used to populate
# the headers, uri and body.
#
# @raise [ArgumentError] Raises ArgumentError when any of the
# request options are invalid (wrong type, missing, unknown, etc).
#
def populate_request request, params
params = @validator.validate!(params)
populate_method(request)
populate_uri(request, params)
populate_headers(request, params)
populate_body(request, params)
end
private
def populate_method request
request.http_method = @http[:verb]
end
def populate_uri request, params
request.uri = extract_uri(params)
end
def populate_headers request, params
extract_headers(params).each_pair do |header_name, header_value|
request.headers[header_name] = header_value
end
end
# @param [Hash] params
# @return [String]
def extract_uri params
path, querystring = @http[:uri].split(/\?/)
uri = path.gsub(/:\w+/) do |param_name|
if param = params.delete(param_name.sub(/^:/, '').to_sym)
UriEscape.escape(param)
else
raise ArgumentError, "missing required option #{param_name}"
end
end
querystring_parts = []
querystring.to_s.split(/&|;/).each do |part|
param_name = part.match(/:(\w+)/)[1]
if param = params.delete(param_name.to_sym)
param = UriEscape.escape(param)
querystring_parts << part.sub(/:#{param_name}/, param)
end
end
unless querystring_parts.empty?
uri << "?#{querystring_parts.join('&')}"
end
uri
end
# @param [Hash] params
# @return [Hash]
def extract_headers params
headers = {}
(@http[:request_headers] || {}).each_pair do |param,header|
headers[header] = params[param] if params.key?(param)
end
headers
end
# @param [Hash] params
# @return [String,nil]
def populate_body request, params
if params.empty?
request.body = nil
elsif payload = streaming_param # streaming request
request.body_stream = params[payload]
request.headers['Content-Length'] = size(params[payload])
else
request.body = @serializer.serialize(params)
end
end
def size(payload)
if payload.respond_to?(:path) && payload.path
File.size(payload.path)
else
payload.size
end
end
def streaming_param
if payload = @http[:request_payload]
@rules[payload][:type] == :blob ? payload : nil
end
end
end
end
end
|
