##Rails HTTP Status Codes
Since there wasn't a nicely formatted list with descriptions around, here's the available status codes.
This is based off of the codes defined in Rack::Utils
#####1xx Informational
Status Symbol Description
------------------------------------------------------------
100 :continue Continue
101 :switching_protocols Switching Protocols
102 :processing Processing
#####2xx Success
Status Symbol Description
------------------------------------------------------------
200 :ok OK
201 :created Created
202 :accepted Accepted
203 :non_authoritative_information Non-Authoritative Information
204 :no_content No Content
205 :reset_content Reset Content
206 :partial_content Partial Content
207 :multi_status Multi-Status
226 :im_used IM Used
#####3xx Redirection
Status Symbol Description
------------------------------------------------------------
300 :multiple_choices Multiple Choices
301 :moved_permanently Moved Permanently
302 :found Found
303 :see_other See Other
304 :not_modified Not Modified
305 :use_proxy Use Proxy
307 :temporary_redirect Temporary Redirect
#####4xx Client Error
Status Symbol Description
------------------------------------------------------------
400 :bad_request Bad Request
401 :unauthorized Unauthorized
402 :payment_required Payment Required
403 :forbidden Forbidden
404 :not_found Not Found
405 :method_not_allowed Method Not Allowed
406 :not_acceptable Not Acceptable
407 :proxy_authentication_required Proxy Authentication Required
408 :request_timeout Request Timeout
409 :conflict Conflict
410 :gone Gone
411 :length_required Length Required
412 :precondition_failed Precondition Failed
413 :request_entity_too_large Request Entity Too Large
414 :request_uri_too_long Request-URI Too Long
415 :unsupported_media_type Unsupported Media Type
416 :requested_range_not_satisfiable Requested Range Not Satisfiable
417 :expectation_failed Expectation Failed
422 :unprocessable_entity Unprocessable Entity
423 :locked Locked
424 :failed_dependency Failed Dependency
426 :upgrade_required Upgrade Required
#####5xx Server Error Status Symbol Description ------------------------------------------------------------ 500 :internal_server_error Internal Server Error 501 :not_implemented Not Implemented 502 :bad_gateway Bad Gateway 503 :service_unavailable Service Unavailable 504 :gateway_timeout Gateway Timeout 505 :http_version_not_supported HTTP Version Not Supported 507 :insufficient_storage Insufficient Storage 510 :not_extended Not Extended