Module: GRApiManager::BodyParser

Defined in:
lib/gr_api_manager.rb

Overview

BodyParser — detects Content-Type and returns an appropriate parsed result.

Supported formats: application/json -> Hash (symbolized keys) multipart/form-data -> Hash + :_files key (FilePayload objects) application/octet-stream -> :_raw_binary (FilePayload) image/* / application/pdf etc. -> :_raw_binary (FilePayload) text/plain -> :_raw_text (String) application/x-www-form-urlencoded-> Hash (Sinatra already handles this)

Constant Summary collapse

BINARY_MIME_PREFIXES = 
%w[
  image/ video/ audio/ application/pdf application/msword
  application/vnd. application/zip application/x-tar
  application/x-rar application/octet-stream
].freeze

Class Method Summary collapse

Class Method Details

.binary_content_type?(ct) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gr_api_manager.rb', line 250

def self.binary_content_type?(ct)
  BINARY_MIME_PREFIXES.any? { |prefix| ct.start_with?(prefix) }
end

.ext_for(content_type) ⇒ Object

Maps common MIME types to file extensions for unnamed raw uploads.



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# File 'lib/gr_api_manager.rb', line 255

def self.ext_for(content_type)
  {
    'image/jpeg'          => '.jpg',
    'image/png'           => '.png',
    'image/gif'           => '.gif',
    'image/webp'          => '.webp',
    'image/svg+xml'       => '.svg',
    'image/bmp'           => '.bmp',
    'video/mp4'           => '.mp4',
    'video/webm'          => '.webm',
    'audio/mpeg'          => '.mp3',
    'audio/wav'           => '.wav',
    'application/pdf'     => '.pdf',
    'application/msword'  => '.doc',
    'application/zip'     => '.zip',
    'application/x-tar'   => '.tar',
    'application/octet-stream' => '.bin'
  }.fetch(content_type, '.bin')
end

.parse(request) ⇒ Object

Returns a Hash of parsed body values. Special keys injected into the result hash:

:_files        => { field_name => FilePayload }  (multipart)
:_raw_binary   => FilePayload                    (raw binary body)
:_raw_text     => String                         (plain-text body)


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# File 'lib/gr_api_manager.rb', line 153

def self.parse(request)
  content_type = (request.content_type || '').split(';').first.strip.downcase

  case content_type
  when 'application/json'
    parse_json(request)

  when 'multipart/form-data'
    parse_multipart(request)

  when 'application/x-www-form-urlencoded'
    # Sinatra already exposes these in `params` — nothing extra to do.
    {}

  when 'text/plain'
    text = request.body.read.to_s.force_encoding(Encoding::UTF_8)
    { _raw_text: text }

  else
    # Treat anything else that looks binary as a raw binary upload.
    if binary_content_type?(content_type)
      parse_raw_binary(request, content_type)
    else
      # Last resort: try JSON, silently fall back to empty hash.
      parse_json(request) rescue {}
    end
  end
end

.parse_json(request) ⇒ Object 



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# File 'lib/gr_api_manager.rb', line 185

def self.parse_json(request)
  body = request.body.read.to_s
  return {} if body.strip.empty?
  JSON.parse(body, symbolize_names: true)
rescue JSON::ParserError => e
  raise ArgumentError, "Invalid JSON body: #{e.message}"
end

.parse_multipart(request) ⇒ Object 



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# File 'lib/gr_api_manager.rb', line 193

def self.parse_multipart(request)
  result = {}
  files  = {}

  request.params.each do |key, value|
    sym = key.to_sym

    if value.is_a?(Hash) && value.key?(:tempfile)
      # Rack multipart file upload hash
      files[sym] = FilePayload.new(
        tempfile:     value[:tempfile],
        filename:     value[:filename] || key,
        content_type: value[:type] || 'application/octet-stream'
      )
    elsif value.is_a?(Array)
      # Multiple file inputs with the same name
      files[sym] = value.map do |v|
        if v.is_a?(Hash) && v.key?(:tempfile)
          FilePayload.new(
            tempfile:     v[:tempfile],
            filename:     v[:filename] || key,
            content_type: v[:type] || 'application/octet-stream'
          )
        else
          v
        end
      end
    else
      result[sym] = value
    end
  end

  result[:_files] = files unless files.empty?
  result
end

.parse_raw_binary(request, content_type) ⇒ Object 



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# File 'lib/gr_api_manager.rb', line 229

def self.parse_raw_binary(request, content_type)
  raw = request.body.read
  return {} if raw.nil? || raw.empty?

  # Try to derive a filename from the Content-Disposition header, if any.
  disposition = request.env['HTTP_CONTENT_DISPOSITION'] || ''
  filename    = disposition[/filename="?([^";]+)"?/, 1] || "upload#{ext_for(content_type)}"

  # Wrap the raw bytes in a StringIO so FilePayload can rewind/read it.
  io = StringIO.new(raw.force_encoding(Encoding::BINARY))
  io.define_singleton_method(:size) { raw.bytesize }

  payload = FilePayload.new(
    tempfile:     io,
    filename:     filename,
    content_type: content_type
  )

  { _raw_binary: payload }
end