Class: Elastomer::Middleware::EncodeJson

Inherits:
Faraday::Middleware
  • Object
show all
Defined in:
lib/elastomer/middleware/encode_json.rb

Overview

Request middleware that encodes the body as JSON.

Processes only requests with matching Content-type or those without a type. If a request doesn’t have a type but has a body, it sets the Content-type to JSON MIME-type.

Doesn’t try to encode bodies that already are in string form.

Constant Summary collapse

CONTENT_TYPE = 
"Content-Type".freeze
MIME_TYPE = 
"application/json".freeze

Instance Method Summary collapse

Instance Method Details

#add_content_type!(env) ⇒ Object 



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# File 'lib/elastomer/middleware/encode_json.rb', line 47

def add_content_type!(env)
  method = env[:method]
  if method == :put || method == :post || has_body?(env)
    env[:request_headers][CONTENT_TYPE] ||= MIME_TYPE
  end
end

#call(env) ⇒ Object 



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# File 'lib/elastomer/middleware/encode_json.rb', line 14

def call(env)
  match_content_type(env) do |data|
    env[:body] = encode data
  end
  @app.call env
end

#encode(data) ⇒ Object 



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# File 'lib/elastomer/middleware/encode_json.rb', line 21

def encode(data)
  MultiJson.dump data
end

#has_body?(env) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/elastomer/middleware/encode_json.rb', line 37

def has_body?(env)
  (body = env[:body]) && !(body.respond_to?(:to_str) && body.empty?)
end

#match_content_type(env) ⇒ Object 



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# File 'lib/elastomer/middleware/encode_json.rb', line 25

def match_content_type(env)
  add_content_type!(env)
  if process_request?(env)
    yield env[:body] unless env[:body].respond_to?(:to_str)
  end
end

#process_request?(env) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/elastomer/middleware/encode_json.rb', line 32

def process_request?(env)
  type = request_type(env)
  has_body?(env) && (type.empty? || type == MIME_TYPE)
end

#request_type(env) ⇒ Object 



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# File 'lib/elastomer/middleware/encode_json.rb', line 41

def request_type(env)
  type = env[:request_headers][CONTENT_TYPE].to_s
  type = type.split(";", 2).first if type.index(";")
  type
end