class OAuth::Consumer

Overview

An OAuth consumer.

For a quick example of how to authenticate an HTTP::Client with OAuth if you already have an access token, check the OAuth module description.

This class also provides methods to get request tokens, build authorize URIs and get access tokens, as specified by RFC 5849.

Example

require "oauth"

consumer_key = "some_key"
consumer_secret = "some_secret"
oauth_callback = "http://some.callback"

# Create consumer, optionally pass custom URIs if needed,
# if the request, authorize or access_token URIs are not the standard ones
# (they can also be absolute URLs)
consumer = OAuth::Consumer.new("api.example.com", consumer_key, consumer_secret)

# Get a request token.
# We probably need to save this somewhere to get it back in the
# callback URL (saving token and secret should be enough)
request_token = consumer.get_request_token(oauth_callback)

# Build an authorize URI
authorize_uri = consumer.get_authorize_uri(request_token, oauth_callback)

# Redirect the user to `authorize_uri`...
#
# ...
#
# When http://some.callback is hit, once the user authorized the access,
# we resume our logic to finally get an access token. The callback URL
# should receive an `oauth_verifier` parameter that we need to use.
oauth_verifier = request.params["oauth_verifier"]

# Get the access token
access_token = consumer.get_access_token(request_token, oauth_verifier)

# Probably save the access token for reuse... This can be done
# with `to_json` and `from_json`.

# Use the token to authenticate an HTTP::Client
client = HTTP::Client.new("api.example.com", tls: true)
access_token.authenticate(client, consumer_key, consumer_secret)

# And do requests as usual
client.get "/some_path"

Defined in:

oauth/consumer.cr

Constructors

Instance Method Summary

Instance methods inherited from class Reference

==(other : self)
==(other) ==, dup dup, hash hash, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, pretty_print(pp) : Nil pretty_print, same?(other : Reference)
same?(other : Nil) same?, to_s(io : IO) : Nil to_s

Constructor methods inherited from class Reference

new new

Instance methods inherited from class Object

!=(other) !=, !~(other) !~, ==(other) ==, ===(other : JSON::Any)
===(other : YAML::Any)
===(other) ===, =~(other) =~, class class, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, tap(&block) tap, to_json(io : IO)
to_json to_json, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ") to_pretty_json, to_s
to_s(io : IO) to_s, to_yaml(io : IO)
to_yaml to_yaml, try(&block) try, unsafe_as(type : T.class) forall T unsafe_as

Constructor methods inherited from class Object

from_json(string_or_io, root : String) : self
from_json(string_or_io) : self from_json, from_yaml(string_or_io) : self from_yaml

Constructor Detail

def self.new(host : String, consumer_key : String, consumer_secret : String, port : Int32 = 443, scheme : String = "https", request_token_uri : String = "/oauth/request_token", authorize_uri : String = "/oauth/authorize", access_token_uri : String = "/oauth/access_token") #

Creates an OAuth consumer.

Any or all of the customizable URIs request_token_uri, authorize_uri and access_token_uri can be relative or absolute. If they are relative, the given host, port and scheme will be used. If they are absolute, the absolute URL will be used.


View source

Instance Method Detail

def authenticate(client : HTTP::Client, token : AccessToken) : Nil #

Authenticated an HTTP::Client to add an OAuth authorization header, as specified by RFC 5849, Section 3.


View source
def get_access_token(request_token, oauth_verifier, extra_params = nil) : AccessToken #

Gets an access token from a previously obtained request token and an oauth_verifier obtained from an authorize URI, as specified by RFC 5849, Section 2.3.

Raises OAuth::Error if there was an error getting the access token.


View source
def get_authorize_uri(request_token, oauth_callback = nil) : String #

Returns an authorize URI from a given request token to redirect the user to obtain an access token, as specified by RFC 5849, Section 2.2.


View source
def get_authorize_uri(request_token, oauth_callback = nil, &block : HTTP::Params::Builder -> ) : String #

Returns an authorize URI from a given request token to redirect the user to obtain an access token, as specified by RFC 5849, Section 2.2.

Yields an HTTP::Params::Builder to add extra parameters other than those defined by the standard.


View source
def get_request_token(oauth_callback = "oob") #

Obtains a request token, also known as "temporary credentials", as specified by RFC 5849, Section 2.1.

Raises OAuth::Error if there was an error getting the request token.


View source