Class: Footrest::ParseJson::MimeTypeFix

Inherits:
ResponseMiddleware show all
Defined in:
lib/footrest/parse_json.rb

Overview

Public: Override the content-type of the response with “application/json” if the response body looks like it might be JSON, i.e. starts with an open bracket.

This is to fix responses from certain API providers that insist on serving JSON with wrong MIME-types such as “text/javascript”.

Constant Summary collapse

MIME_TYPE =
'application/json'.freeze
BRACKETS =
%w- [ { -
WHITESPACE =
[ " ", "\n", "\r", "\t" ]

Constants inherited from ResponseMiddleware

ResponseMiddleware::CONTENT_TYPE

Instance Method Summary collapse

Methods inherited from ResponseMiddleware

#call, define_parser, inherited, #initialize, #parse, #process_response_type?, #response_type

Constructor Details

This class inherits a constructor from Footrest::ResponseMiddleware

Instance Method Details

#first_char(body) ⇒ Object


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# File 'lib/footrest/parse_json.rb', line 37

def first_char(body)
  idx = -1
  begin
    char = body[idx += 1]
    char = char.chr if char
  end while char and WHITESPACE.include? char
  char
end

#parse_response?(env) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/footrest/parse_json.rb', line 33

def parse_response?(env)
  super and BRACKETS.include? first_char(env[:body])
end

#process_response(env) ⇒ Object


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# File 'lib/footrest/parse_json.rb', line 23

def process_response(env)
  old_type = env[:response_headers][CONTENT_TYPE].to_s
  new_type = MIME_TYPE.dup
  new_type << ';' << old_type.split(';', 2).last if old_type.index(';')
  env[:response_headers][CONTENT_TYPE] = new_type
end