Class: Grape::Middleware::Versioner::Param
- Defined in:
- lib/grape/middleware/versioner/param.rb
Overview
This middleware sets various version related rack environment variables based on the request parameters and removes that parameter from the request parameters for subsequent middleware and API. If the version substring does not match any potential initialized versions, a 404 error is thrown. If the version substring is not passed the version (highest mounted) version will be used.
Example: For a uri path
/resource?apiver=v1
The following rack env variables are set and path is rewritten to ‘/resource’:
env['api.version'] => 'v1'
Constant Summary
Constants inherited from Base
Instance Attribute Summary
Attributes inherited from Base
Instance Method Summary collapse
Methods inherited from Base
#after, #call, #call!, #content_type, #content_type_for, #content_types, #initialize, #mime_types, #response
Methods included from DSL::Headers
Methods included from Helpers
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/param.rb', line 30 def before potential_version = Rack::Utils.parse_nested_query(env[Rack::QUERY_STRING])[paramkey] return if potential_version.nil? throw :error, status: 404, message: '404 API Version Not Found', headers: { Grape::Http::Headers::X_CASCADE => 'pass' } if [:versions] && ![:versions].find { |v| v.to_s == potential_version } env[Grape::Env::API_VERSION] = potential_version env[Rack::RACK_REQUEST_QUERY_HASH].delete(paramkey) if env.key? Rack::RACK_REQUEST_QUERY_HASH end |
#default_options ⇒ Object
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# File 'lib/grape/middleware/versioner/param.rb', line 22 def { version_options: { parameter: 'apiver' } } end |