Module: Elasticsearch::API::Utils

Extended by:
Utils
Included in:
Utils
Defined in:
lib/elasticsearch/api/utils.rb

Overview

Generic utility methods

Instance Method Summary collapse

Instance Method Details

#__bulkify(payload) ⇒ Object

Convert an array of payloads into Elasticsearch `headerndata` format

Supports various different formats of the payload: Array of Strings, Header/Data pairs, or the conveniency “combined” format where data is passed along with the header in a single item.

Elasticsearch::API::Utils.__bulkify [
  { :index =>  { :_index => 'myindexA', :_type => 'mytype', :_id => '1', :data => { :title => 'Test' } } },
  { :update => { :_index => 'myindexB', :_type => 'mytype', :_id => '2', :data => { :doc => { :title => 'Update' } } } }
]

# => {"index":{"_index":"myindexA","_type":"mytype","_id":"1"}}
# => {"title":"Test"}
# => {"update":{"_index":"myindexB","_type":"mytype","_id":"2"}}
# => {"doc":{"title":"Update"}}

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
# File 'lib/elasticsearch/api/utils.rb', line 100

def __bulkify(payload)
  operations = %w[index create delete update]

  case

  # Hashes with `:data`
  when payload.any? { |d| d.is_a?(Hash) && d.values.first.is_a?(Hash) && operations.include?(d.keys.first.to_s) && (d.values.first[:data] || d.values.first['data']) }
    payload = payload.
      inject([]) do |sum, item|
        operation, meta = item.to_a.first
        meta            = meta.clone
        data            = meta.delete(:data) || meta.delete('data')

        sum << { operation => meta }
        sum << data if data
        sum
      end.
      map { |item| Elasticsearch::API.serializer.dump(item) }
    payload << '' unless payload.empty?

  # Array of strings
  when payload.all? { |d| d.is_a? String }
    payload << ''

  # Header/Data pairs
  else
    payload = payload.map { |item| Elasticsearch::API.serializer.dump(item) }
    payload << ''
  end

  payload = payload.join("\n")
end

#__escape(string) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

URL-escape a string

Examples:

__escape('foo/bar') # => 'foo%2Fbar'
__escape('bar^bam') # => 'bar%5Ebam'

32
33
34
35
# File 'lib/elasticsearch/api/utils.rb', line 32

def __escape(string)
  return string if string == '*'
  defined?(EscapeUtils) ? EscapeUtils.escape_url(string.to_s) : CGI.escape(string.to_s)
end

#__extract_params(arguments, params = [], options = {}) ⇒ Object


176
177
178
179
180
181
# File 'lib/elasticsearch/api/utils.rb', line 176

def __extract_params(arguments, params=[], options={})
  result = arguments.select { |k,v| COMMON_QUERY_PARAMS.include?(k) || params.include?(k) }
  result = Hash[result] unless result.is_a?(Hash) # Normalize Ruby 1.8 and Ruby 1.9 Hash#select behaviour
  result = Hash[result.map { |k,v| v.is_a?(Array) ? [k, __listify(v, options)] : [k,v]  }] # Listify Arrays
  result
end

#__extract_parts(arguments, valid_parts = []) ⇒ Array<String>

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Note:

Mutates the `arguments` argument, to prevent failures in `__validate_and_extract_params`.

Extracts the valid parts of the URL from the arguments

Examples:

Extract parts

__extract_parts { :foo => true }, [:foo, :bar]
# => [:foo]

Parameters:

  • arguments (Hash)

    Hash of arguments to verify and extract, **with symbolized keys**

  • valid_parts (Array<Symbol>) (defaults to: [])

    An array of symbol with valid keys

Returns:

  • (Array<String>)

    Valid parts of the URL as an array of strings


199
200
201
202
203
204
205
# File 'lib/elasticsearch/api/utils.rb', line 199

def __extract_parts(arguments, valid_parts=[])
  parts = Hash[arguments.select { |k,v| valid_parts.include?(k) }]
  parts = parts.reduce([]) { |sum, item| k, v = item; v.is_a?(TrueClass) ? sum << k.to_s : sum << v  }

  arguments.delete_if { |k,v| valid_parts.include? k }
  return parts
end

#__listify(*list) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Create a “list” of values from arguments, ignoring nil values and encoding special characters.

Examples:

Create a list from array

__listify(['A','B']) # => 'A,B'

Create a list from arguments

__listify('A','B') # => 'A,B'

Escape values

__listify('foo','bar^bam') # => 'foo,bar%5Ebam'

Do not escape the values

__listify('foo','bar^bam', escape: false) # => 'foo,bar^bam'

52
53
54
55
56
57
58
59
60
61
62
# File 'lib/elasticsearch/api/utils.rb', line 52

def __listify(*list)
  options = list.last.is_a?(Hash) ? list.pop : {}

  escape = options[:escape]
  Array(list).
    flat_map { |e| e.respond_to?(:split) ? e.split(',') : e }.
    flatten.
    compact.
    map { |e| escape == false ? e : __escape(e) }.
    join(',')
end

#__pathify(*segments) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Create a path (URL part) from arguments, ignoring nil values and empty strings.

# @example Encode special characters

__pathify(['foo', 'bar^bam']) # => 'foo/bar%5Ebam'

Examples:

Create a path from array

__pathify(['foo', '', nil, 'bar']) # => 'foo/bar'

Create a path from arguments

__pathify('foo', '', nil, 'bar') # => 'foo/bar'

76
77
78
79
80
81
82
# File 'lib/elasticsearch/api/utils.rb', line 76

def __pathify(*segments)
  Array(segments).flatten.
    compact.
    reject { |s| s.to_s.strip.empty? }.
    join('/').
    squeeze('/')
end

#__report_unsupported_method(name) ⇒ Object


270
271
272
273
274
275
276
277
278
279
280
281
282
283
# File 'lib/elasticsearch/api/utils.rb', line 270

def __report_unsupported_method(name)
  message = "[!] You are using unsupported method [#{name}]"
  if source = caller && caller.last
    message += " in `#{source}`"
  end

  message += ". This method is not supported in the version you're using: #{Elasticsearch::API::VERSION}, and will be removed in the next release. Suppress this warning by the `-WO` command line flag."

  if STDERR.tty?
    Kernel.warn "\e[31;1m#{message}\e[0m"
  else
    Kernel.warn message
  end
end

#__report_unsupported_parameters(arguments, params = []) ⇒ Object


228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
# File 'lib/elasticsearch/api/utils.rb', line 228

def __report_unsupported_parameters(arguments, params=[])
  messages = []
  unsupported_params = params.select {|d| d.is_a?(Hash) ? arguments.include?(d.keys.first) : arguments.include?(d) }

  unsupported_params.each do |param|
    name = case param
    when Symbol
      param
    when Hash
      param.keys.first
    else
      raise ArgumentError, "The param must be a Symbol or a Hash"
    end

    explanation = if param.is_a?(Hash)
      ". #{param.values.first[:explanation]}."
    else
      ". This parameter is not supported in the version you're using: #{Elasticsearch::API::VERSION}, and will be removed in the next release."
    end

    message = "[!] You are using unsupported parameter [:#{name}]"

    if source = caller && caller.last
      message += " in `#{source}`"
    end

    message += explanation

    messages << message
  end

  unless messages.empty?
    messages << "Suppress this warning by the `-WO` command line flag."

    if STDERR.tty?
      Kernel.warn messages.map { |m| "\e[31;1m#{m}\e[0m" }.join("\n")
    else
      Kernel.warn messages.join("\n")
    end
  end
end

#__rescue_from_not_found {|block| ... } ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Calls the given block, rescuing from `StandardError`.

Primary use case is the `:ignore` parameter for API calls.

Returns `false` if exception contains NotFound in its class name or message, else re-raises the exception.

Yields:

  • (block)

    A block of code to be executed with exception handling.


218
219
220
221
222
223
224
225
226
# File 'lib/elasticsearch/api/utils.rb', line 218

def __rescue_from_not_found(&block)
  yield
rescue StandardError => e
  if e.class.to_s =~ /NotFound/ || e.message =~ /Not\s*Found/i
    false
  else
    raise e
  end
end

#__validate_and_extract_params(arguments, params = [], options = {}) ⇒ Hash

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Validates the argument Hash against common and valid API parameters

Examples:

Extract parameters

__validate_and_extract_params( { :foo => 'qux' }, [:foo, :bar] )
# => { :foo => 'qux' }

Raise an exception for invalid parameters

__validate_and_extract_params( { :foo => 'qux', :bam => 'mux' }, [:foo, :bar] )
# ArgumentError: "URL parameter 'bam' is not supported"

Skip validating parameters

__validate_and_extract_params( { :foo => 'q', :bam => 'm' }, [:foo, :bar], { skip_parameter_validation: true } )
# => { :foo => "q", :bam => "m" }

Skip validating parameters when the module setting is set

Elasticsearch::API.settings[:skip_parameter_validation] = true
__validate_and_extract_params( { :foo => 'q', :bam => 'm' }, [:foo, :bar] )
# => { :foo => "q", :bam => "m" }

Parameters:

  • arguments (Hash)

    Hash of arguments to verify and extract, **with symbolized keys**

  • valid_params (Array<Symbol>)

    An array of symbols with valid keys

Returns:

  • (Hash)

    Return whitelisted Hash

Raises:

  • (ArgumentError)

    If the arguments Hash contains invalid keys


160
161
162
163
164
165
166
167
# File 'lib/elasticsearch/api/utils.rb', line 160

def __validate_and_extract_params(arguments, params=[], options={})
  if options[:skip_parameter_validation] || Elasticsearch::API.settings[:skip_parameter_validation]
    arguments
  else
    __validate_params(arguments, params)
    __extract_params(arguments, params, options.merge(:escape => false))
  end
end

#__validate_params(arguments, valid_params = []) ⇒ Object


169
170
171
172
173
174
# File 'lib/elasticsearch/api/utils.rb', line 169

def __validate_params(arguments, valid_params=[])
  arguments.each do |k,v|
    raise ArgumentError, "URL parameter '#{k}' is not supported" \
      unless COMMON_PARAMS.include?(k) || COMMON_QUERY_PARAMS.include?(k) || valid_params.include?(k)
  end
end