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#
# Author:: Adam Jacob (<adam@chef.io>)
# Copyright:: Copyright (c) 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_relative "../config"
require_relative "../exceptions"
require_relative "../server_api"
autoload :URI, "uri"
module Addressable
autoload :URI, "addressable/uri"
end
class Chef
class Search
class Query
attr_reader :config
def initialize(url = nil, config: Chef::Config)
@config = config
@url = url
end
def rest
@rest ||= Chef::ServerAPI.new(@url || @config[:chef_server_url])
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)
if args_h[:fuzz]
if type.to_sym == :node
query = fuzzify_node_query(query)
end
# FIXME: can i haz proper ruby-2.x named parameters someday plz?
args_h = args_h.reject { |k, v| k == :fuzz }
end
# Set default rows parameter to 1000. This is the default in
# Chef Server, but we set it explicitly here so that we can
# confidently advance our start parameter.
args_h[:rows] ||= 1000
response = call_rest_service(type, query: query, **args_h)
if block
response["rows"].each { |row| yield(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]
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 fuzzify_node_query(query)
if !/:/.match?(query)
"tags:*#{query}* OR roles:*#{query}* OR fqdn:*#{query}* OR addresses:*#{query}* OR policy_name:*#{query}* OR policy_group:*#{query}*"
else
query
end
end
def validate_type(t)
unless t.is_a?(String) || t.is_a?(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 {} if args.empty?
return args.first if args.first.is_a?(Hash)
args_h = {}
args_h[:start] = args[0] if args[0]
args_h[:rows] = args[1]
args_h[:filter_result] = args[2]
args_h
end
def escape_value(s)
query_param_value = Addressable::URI::CharacterClasses::QUERY + "\\&\\;"
s && Addressable::URI.encode_component(s.to_s, query_param_value)
end
def create_query_string(type, query, rows, start)
qstr = "search/#{type}?q=#{escape_value(query)}"
qstr += "&start=#{escape_value(start)}" if start
qstr += "&rows=#{escape_value(rows)}" if rows
qstr
end
def call_rest_service(type, query: "*:*", rows: nil, start: 0, filter_result: nil)
query_string = create_query_string(type, query, rows, start)
if filter_result
response = rest.post(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(query_string)
response["rows"].map! do |row|
case type.to_s
when "node"
Chef::Node.from_hash(row)
when "role"
Chef::Role.from_hash(row)
when "environment"
Chef::Environment.from_hash(row)
when "client"
Chef::ApiClient.from_hash(row)
else
Chef::DataBagItem.from_hash(row)
end
end
end
response
end
end
end
end
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