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#
# Author:: Adam Jacob (<adam@opscode.com>)
# Copyright:: Copyright (c) 2008 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 'chef/config'
require 'chef/exceptions'
require 'chef/rest'
require 'uri'
class Chef
class Search
class Query
attr_accessor :rest
attr_reader :config
def initialize(url=nil, config:Chef::Config)
@config = config
@url = url
end
def rest
@rest ||= Chef::REST.new(@url || @config[:chef_server_url])
end
# Backwards compatability for cookbooks.
# This can be removed in Chef > 12.
def partial_search(type, query='*:*', *args, &block)
Chef::Log.warn(<<-WARNDEP)
DEPRECATED: The 'partial_search' API is deprecated and will be removed in
future releases. Please use 'search' with a :filter_result argument to get
partial search data.
WARNDEP
if !args.empty? && args.first.is_a?(Hash)
# partial_search uses :keys instead of :filter_result for
# result filtering.
args_h = args.first.dup
args_h[:filter_result] = args_h[:keys]
args_h.delete(:keys)
search(type, query, args_h, &block)
else
search(type, query, *args, &block)
end
end
#
# New search input, designed to be backwards compatible with the old method signature
# 'type' and 'query' are the same as before, args now will accept either a Hash of
# search arguments with symbols as the keys (ie :sort, :start, :rows) and a :filter_result
# option.
#
# :filter_result should be in the format of another Hash with the structure of:
# {
# :returned_name1 => ["path", "to", "variable"],
# :returned_name2 => ["shorter", "path"]
# }
# a real world example might be something like:
# {
# :ip_address => ["ipaddress"],
# :ruby_version => ["languages", "ruby", "version"]
# }
# this will bring back 2 variables 'ip_address' and 'ruby_version' with whatever value was found
# an example of the returned json may be:
# {"ip_address":"127.0.0.1", "ruby_version": "1.9.3"}
#
def search(type, query='*:*', *args, &block)
validate_type(type)
args_h = hashify_args(*args)
response = call_rest_service(type, query: query, **args_h)
if block
response["rows"].each { |row| block.call(row) if row }
#
# args_h[:rows] and args_h[:start] are the page size and
# start position requested of the search index backing the
# search API.
#
# The response may contain fewer rows than arg_h[:rows] if
# the page of index results included deleted nodes which
# have been filtered from the returned data. In this case,
# we still want to start the next page at start +
# args_h[:rows] to avoid asking the search backend for
# overlapping pages (which could result in duplicates).
#
next_start = response["start"] + (args_h[:rows] || response["rows"].length)
unless next_start >= response["total"]
args_h[:start] = next_start
search(type, query, args_h, &block)
end
true
else
[ response["rows"], response["start"], response["total"] ]
end
end
private
def validate_type(t)
unless t.kind_of?(String) || t.kind_of?(Symbol)
msg = "Invalid search object type #{t.inspect} (#{t.class}), must be a String or Symbol." +
"Usage: search(:node, QUERY[, OPTIONAL_ARGS])" +
" `knife search environment QUERY (options)`"
raise Chef::Exceptions::InvalidSearchQuery, msg
end
end
def hashify_args(*args)
return Hash.new if args.empty?
return args.first if args.first.is_a?(Hash)
args_h = Hash.new
args_h[:sort] = args[0] if args[0]
args_h[:start] = args[1] if args[1]
args_h[:rows] = args[2]
args_h[:filter_result] = args[3]
args_h
end
def escape(s)
s && URI.escape(s.to_s)
end
def create_query_string(type, query, rows, start, sort)
qstr = "search/#{type}?q=#{escape(query)}"
qstr += "&sort=#{escape(sort)}" if sort
qstr += "&start=#{escape(start)}" if start
qstr += "&rows=#{escape(rows)}" if rows
qstr
end
def call_rest_service(type, query:'*:*', rows:nil, start:0, sort:'X_CHEF_id_CHEF_X asc', filter_result:nil)
query_string = create_query_string(type, query, rows, start, sort)
if filter_result
response = rest.post_rest(query_string, filter_result)
# response returns rows in the format of
# { "url" => url_to_node, "data" => filter_result_hash }
response['rows'].map! { |row| row['data'] }
else
response = rest.get_rest(query_string)
end
response
end
end
end
end
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