Class: Grape::Middleware::Versioner::Path

Inherits:
Base
  • Object
show all
Defined in:
lib/grape/middleware/versioner/path.rb

Overview

This middleware sets various version related rack environment variables based on the uri path and removes the version substring from the uri path. If the version substring does not match any potential initialized versions, a 404 error is thrown.

Example: For a uri path /v1/resource

The following rack env variables are set and path is rewritten to '/resource':

env['api.version'] => 'v1'

Instance Attribute Summary

Attributes inherited from Base

#app, #env, #options

Instance Method Summary collapse

Methods inherited from Base

#after, #call, #call!, #content_type, #content_type_for, #content_types, #initialize, #mime_types, #request, #response

Constructor Details

This class inherits a constructor from Grape::Middleware::Base

Instance Method Details

#before ⇒ Object 



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# File 'lib/grape/middleware/versioner/path.rb', line 26

def before
  path = env['PATH_INFO'].dup

  if prefix && path.index(prefix) == 0
    path.sub!(prefix, '')
    path = Rack::Mount::Utils.normalize_path(path)
  end

  pieces = path.split('/')
  potential_version = pieces[1]
  if potential_version =~ options[:pattern]
    if options[:versions] && !options[:versions].find { |v| v.to_s == potential_version }
      throw :error, status: 404, message: "404 API Version Not Found"
    end
    env['api.version'] = potential_version
  end
end

#default_options ⇒ Object 



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# File 'lib/grape/middleware/versioner/path.rb', line 20

def default_options
  {
    pattern: /.*/i
  }
end