Hi Mikkel,
Interesting usage! The Restlet API has been designed to support multiple
authorization mechanisms (aka challenge schemes in HTTP terminology).
Following the S3 docs:
http://docs.amazonwebservices.com/AmazonS3/2006-03-01/RESTAuthentication.htm
l
// Create a request
Request request = new Request(Method.GET, "http://***";);
request.setEntity(myEntity);
// Compute the credentials
String credentials = awsAccessKeyId + ":" + base64(hmac-sha1(VERB +
"\n"
+ "\n"
+
myEntity.getMediaType() + "\n"
+
myEntity.getModificationDate() + "\n"
+
CanonicalizedAmzHeaders + "\n"
+
CanonicalizedResource))
// Set the challenge response
ChallengeScheme cs = new ChallengeScheme("Amazon S3", "AWS");
ChallengeResponse cr = new ChallengeResponse(cs, credentials);
request.setChallengeResponse(authentication);
The NRE provides a Base64 implementation:
com.noelios.restlet.impl.util.Base64 but not an implementation of HMAC-SHA1.
However, I'm sure you can find one around (anyway you would need one to
build the raw header).
Typical usage of Base64: Base64.encodeBytes(myString.getBytes("US-ASCII"));
Let me know how it works, it would be very useful to provide built-in
support for the S3 authentication scheme in a later release of NRE.
Best regards,
Jerome
> -----Message d'origine-----
> De : news [mailto:[EMAIL PROTECTED] De la part de Mikkel Jensen
> Envoyé : jeudi 26 octobre 2006 18:55
> À : [email protected]
> Objet : Adding standard headers
>
> I'm writing an application for connecting to the Amazon S3
> REST service.
> This means I need to follow their custom authentication
> mechanism and construct
> an "Authorization" header based upon the "Date" and
> "Content-Type" headers
> among other things.
> Unfortunately the HttpConverter class does not allow me to
> manipulate standard
> headers or even read the Date and Content-Type headers prior
> to transmission.
>
> Is it possible to use custom authentication schemes in client
> requests or will
> I need to go back to using HttpUrlConnection class for
> low-level control?
>
> Best regards,
>
> Mikkel
>
>
