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client.cr
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client.cr
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class OAuth2::Client
def initialize(@host : String, @client_id : String, @client_secret : String,
@port = 443,
@scheme = "https",
@authorize_uri = "/oauth2/authorize",
@token_uri = "/oauth2/token",
@redirect_uri : String? = nil)
end
def get_authorize_uri(scope = nil, state = nil)
query = HTTP::Params.build do |form|
form.add "client_id", @client_id
form.add "redirect_uri", @redirect_uri
form.add "response_type", "code"
form.add "scope", scope unless scope.nil?
form.add "state", state unless state.nil?
end
URI.new(@scheme, @host, @port, @authorize_uri, query).to_s
end
def get_access_token_using_authorization_code(authorization_code)
get_access_token do |form|
form.add("redirect_uri", @redirect_uri)
form.add("grant_type", "authorization_code")
form.add("code", authorization_code)
end
end
def get_access_token_using_refresh_token(refresh_token, scope = nil)
get_access_token do |form|
form.add("grant_type", "refresh_token")
form.add("refresh_token", refresh_token)
form.add "scope", scope unless scope.nil?
end
end
def get_access_token_using_client_credentials(scope = nil)
get_access_token do |form|
form.add("grant_type", "client_credentials")
form.add("scope", scope) unless scope.nil?
end
end
private def get_access_token
body = HTTP::Params.build do |form|
form.add("client_id", @client_id)
form.add("client_secret", @client_secret)
yield form
end
response = HTTP::Client.post_form(token_uri, body)
case response.status_code
when 200, 201
OAuth2::AccessToken.from_json(response.body)
else
raise OAuth2::Error.from_json(response.body)
end
end
private def token_uri
URI.new(@scheme, @host, @port, @token_uri).to_s
end
end