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- Version History
OAuth 1.0, 1.0a & RFC 5849
* http://oauth.net/core/1.0/ * http://oauth.net/core/1.0a/ * http://tools.ietf.org/html/rfc5849
* [[data-structures]] [[extras]] [[srfi-1]] [[srfi-13]] * [[uri-common]] [[intarweb]] [[http-client]]
make-oauth-credential[procedure] (make-oauth-credential identifier secret)
Returns a credential
Credentials are a pair of a unique identifier and a matching shared secret. OAuth defines three classes of credentials: client, temporary, and token, used to identify and authenticate the client making the request, the authorization request, and the access grant, respectively. -- RFC 5849
You will need to turn your app token and app secret into a credential.
If you store token credentials persistently then you can recombine the identifier and secret with this procedure.
token[procedure] (token credential)
Extracts the identifier part of the credential and returns it.
You will need this procedure in order to store credentials.
secret[procedure] (secret credential)
Extracts the secret part of the credential and returns it.
You will need this procedure in order to store credentials.
make-oauth-service-provider[procedure] (make-oauth-service-provider #!key protocol-version signature-method owner-auth-url credential-request-url (credential-request-method 'POST) token-request-url (token-request-method 'POST) (transmission-method 'authorization-header))
Defines an OAuth service provider.
* Which version of the protocol and how we want to speak to them. * The 3 URIs for Redirection-Based Authorization (RFC5849, Section 2.
The service provider definition returned from this procedure must be combined with a client credential before it can be used as part of a request.
make-oauth-service[procedure] (make-oauth-service #!key service client-credential)
Combines an OAuth service provider definition (from make-oauth-service-provider) with a client credential to produce something that can be used for API requests.
Used to store the service passed to with-oauth.
Used to store the protocol-parameters to pass to requests made within a with-oauth scope.
Used to store the token-credential passed to with-oauth.
with-oauth[procedure] (with-oauth service token-credential thunk)
Execute thunk in an environment where call-with-input-request is bound to a procedure that will sign the request with the supplied OAuth credentials but otherwise behave similarly to call-with-input-request from http-client.
This is the procedure that you probably want to use to wrap API calls.
authenticated-call-with-input-request[procedure] (authenticated-call-with-input-request service protocol-parameters token-credential uri-or-request writer reader)
Similar to call-with-input-request from http-client but will sign the request using the OAuth arguments supplied.
call-with-input-request[procedure] (call-with-input-request uri-or-request writer reader)
Similar to call-with-input-request from http-client but will sign the request using the OAuth parameters oauth-service oauth-protocol-parameters and oauth-token-credential.
You probably don't want to use this procedure directly: use with-oauth instead.
acquire-temporary-credential[procedure] (acquire-temporary-credential service #!optional callback-url)
This is the first step in the three step Redirection-Based Authorization defined in OAuth.
1. The client obtains a set of temporary credentials from the server (in the form of an identifier and shared-secret). The temporary credentials are used to identify the access request throughout the authorization process. -- RFC 5849, Section 2
If you are speaking OAuth 1.0a or RFC 5849 then you must specify callback-url at this stage rather than at the authorize-resource-owner stage.
authorize-resource-owner[procedure] (authorize-resource-owner service temporary-credential #!optional callback-url)
This is the second step in the three step Redirection-Based Authorization defined in OAuth.
2. The resource owner authorizes the server to grant the client's access request (identified by the temporary credentials). -- RFC 5849, Section 2
This procedure returns a URI. It is up to you to redirect the user to this URI and handle the subsequent redirect back to a URI that you control once the user has granted the authorization.
If you are speaking OAuth 1.0 then you may supply callback-url at this stage, otherwise you must not.
acquire-token-credential[procedure] (acquire-token-credential service temporary-credential #!optional verifier)
This is the third step in the three step Redirection-Based Authorization defined in OAuth.
3. The client uses the temporary credentials to request a set of token credentials from the server, which will enable it to access the resource owner's protected resources. -- RFC 5849, Section 2
When the user returns from the authorization step (authorize-resource-owner) you must exchange their temporary credential for a token credential using this procedure.
This procedure will return a token credential that you can save, and reuse along with your oauth-service (make-oauth-service), in order to make signed API calls on behalf of the authorized user.
Once you have obtained the token-credential returned by this procedure you can use with-oauth to make API calls to arbitrary HTTP endpoints.
OAuth 1.0 Flow (no verifier)
You will need a some Dropbox App Credentials to follow this example https://www.dropbox.com/developers/apps
(define dropbox (make-oauth-service-provider protocol-version: 1.0 credential-request-url: "https://api.dropbox.com/1/oauth/request_token" owner-auth-url: "https://www.dropbox.com/1/oauth/authorize" token-request-url: "https://api.dropbox.com/1/oauth/access_token" signature-method: 'plaintext))
(define dropbox-app (make-oauth-service service: dropbox client-credential: (make-oauth-credential "<token>" "<secret>")))
(define x (acquire-temporary-credential dropbox-app))
(use uri-common) (uri->string (authorize-resource-owner dropbox-app x "http://wiki.call-cc.org/eggref/4/oauth"))
(define save-me (acquire-token-credential dropbox-app x)) (with-oauth mydropbox save-me (lambda () (call-with-input-request "https://api.dropbox.com/1/account/info" #f (cut read-string #f <>))))
Copyright (C) 2012, Andy Bennett All rights reserved.
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* 0.1, (2012/10/30) : Initial OAuth 1.0, 1.0a RFC 5849 client