Net::HTTP.get_response(uri)
# => #<Net::HTTPOK 200 OK readbody=true>
Net::HTTP.get_response(hostname, '/nosuch')
# => #<Net::HTTPNotFound 404 Not Found readbody=true>

As does method Net::HTTP#request:

req = Net::HTTP::Get.new(uri)
Net::HTTP.start(hostname) do |http|
  http.request(req)
end # => #<Net::HTTPOK 200 OK readbody=true>

Class Net::HTTPResponse includes module Net::HTTPHeader, which provides access to response header values via (among others):

Hash-like method [].
Specific reader methods, such as content_type.

Examples:

res = Net::HTTP.get_response(uri) # => #<Net::HTTPOK 200 OK readbody=true>
res['Content-Type']               # => "text/html; charset=UTF-8"
res.content_type                  # => "text/html"

Response Subclasses

Class Net::HTTPResponse has a subclass for each HTTP status code. You can look up the response class for a given code:

Net::HTTPResponse::CODE_TO_OBJ['200'] # => Net::HTTPOK
Net::HTTPResponse::CODE_TO_OBJ['400'] # => Net::HTTPBadRequest
Net::HTTPResponse::CODE_TO_OBJ['404'] # => Net::HTTPNotFound

And you can retrieve the status code for a response object:

Net::HTTP.get_response(uri).code                 # => "200"
Net::HTTP.get_response(hostname, '/nosuch').code # => "404"

The response subclasses (indentation shows class hierarchy):

Net::HTTPUnknownResponse (for unhandled HTTP extensions).
Net::HTTPInformation:
- Net::HTTPContinue (100)
- Net::HTTPSwitchProtocol (101)
- Net::HTTPProcessing (102)
- Net::HTTPEarlyHints (103)
Net::HTTPSuccess:
- Net::HTTPOK (200)
- Net::HTTPCreated (201)
- Net::HTTPAccepted (202)
- Net::HTTPNonAuthoritativeInformation (203)
- Net::HTTPNoContent (204)
- Net::HTTPResetContent (205)
- Net::HTTPPartialContent (206)
- Net::HTTPMultiStatus (207)
- Net::HTTPAlreadyReported (208)
- Net::HTTPIMUsed (226)
Net::HTTPRedirection:
- Net::HTTPMultipleChoices (300)
- Net::HTTPMovedPermanently (301)
- Net::HTTPFound (302)
- Net::HTTPSeeOther (303)
- Net::HTTPNotModified (304)
- Net::HTTPUseProxy (305)
- Net::HTTPTemporaryRedirect (307)
- Net::HTTPPermanentRedirect (308)
Net::HTTPClientError:
- Net::HTTPBadRequest (400)
- Net::HTTPUnauthorized (401)
- Net::HTTPPaymentRequired (402)
- Net::HTTPForbidden (403)
- Net::HTTPNotFound (404)
- Net::HTTPMethodNotAllowed (405)
- Net::HTTPNotAcceptable (406)
- Net::HTTPProxyAuthenticationRequired (407)
- Net::HTTPRequestTimeOut (408)
- Net::HTTPConflict (409)
- Net::HTTPGone (410)
- Net::HTTPLengthRequired (411)
- Net::HTTPPreconditionFailed (412)
- Net::HTTPRequestEntityTooLarge (413)
- Net::HTTPRequestURITooLong (414)
- Net::HTTPUnsupportedMediaType (415)
- Net::HTTPRequestedRangeNotSatisfiable (416)
- Net::HTTPExpectationFailed (417)
- Net::HTTPMisdirectedRequest (421)
- Net::HTTPUnprocessableEntity (422)
- Net::HTTPLocked (423)
- Net::HTTPFailedDependency (424)
- Net::HTTPUpgradeRequired (426)
- Net::HTTPPreconditionRequired (428)
- Net::HTTPTooManyRequests (429)
- Net::HTTPRequestHeaderFieldsTooLarge (431)
- Net::HTTPUnavailableForLegalReasons (451)
Net::HTTPServerError:
- Net::HTTPInternalServerError (500)
- Net::HTTPNotImplemented (501)
- Net::HTTPBadGateway (502)
- Net::HTTPServiceUnavailable (503)
- Net::HTTPGatewayTimeOut (504)
- Net::HTTPVersionNotSupported (505)
- Net::HTTPVariantAlsoNegotiates (506)
- Net::HTTPInsufficientStorage (507)
- Net::HTTPLoopDetected (508)
- Net::HTTPNotExtended (510)
- Net::HTTPNetworkAuthenticationRequired (511)

There is also the Net::HTTPBadResponse exception which is raised when there is a protocol error.

Net::HTTPUnknownResponse

No documentation available

Net::HTTPContinue

Response class for Continue responses (status code 100).

A Continue response indicates that the server has received the request headers.

References:

Net::HTTPAccepted

Response class for Accepted responses (status code 202).

The Accepted response indicates that the server has received and is processing a request, but the processing has not yet been completed. See 202 Accepted.

Net::HTTPResetContent

Response class for Reset Content responses (status code 205).

The Reset Content response indicates that the server successfully processed the request, asks that the client reset its document view, and is not returning any content. See 205 Reset Content.

Net::HTTPSeeOther

Response class for See Other responses (status code 303).

The response to the request can be found under another URI using the GET method. See 303 See Other.

Net::HTTPTemporaryRedirect

Response class for Temporary Redirect responses (status code 307).

The request should be repeated with another URI; however, future requests should still use the original URI. See 307 Temporary Redirect.

Net::HTTPPayloadTooLarge

Response class for Payload Too Large responses (status code 413).

The request is larger than the server is willing or able to process. See 413 Payload Too Large.

Net::HTTPRequestEntityTooLarge

Response class for Payload Too Large responses (status code 413).

The request is larger than the server is willing or able to process. See 413 Payload Too Large.

Net::HTTPUnprocessableEntity

Response class for Unprocessable Entity responses (status code 422).

The request was well-formed but had semantic errors. See 422 Unprocessable Entity.

Net::HTTPRequestHeaderFieldsTooLarge

Response class for Request Header Fields Too Large responses (status code 431).

An individual header field is too large, or all the header fields collectively, are too large. See 431 Request Header Fields Too Large.

Net::HTTPServiceUnavailable

Response class for Service Unavailable responses (status code 503).

The server cannot handle the request (because it is overloaded or down for maintenance). See 503 Service Unavailable.

Net::OpenTimeout

OpenTimeout, a subclass of Timeout::Error, is raised if a connection cannot be created within the open_timeout.

Net::WriteAdapter

The writer adapter class

Racc::GrammarFileScanner

No documentation available