Visual FoxPro

Configure AWS Signature Authentication for REST

Demonstrates Rest.SetAuthAws, which associates an AuthAws provider so Chilkat signs each request using AWS Signature Version 4. The provider supplies the access key, secret key, region, and service name.

Background. AWS requires each request to be signed with a signature derived from the secret key, region, service, and request contents. Configuring the provider lets Chilkat compute and attach the signature automatically.

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LOCAL lnSuccess
LOCAL loRest
LOCAL lnBTls
LOCAL lnBAutoReconnect
LOCAL loAuthAws
LOCAL lcResponseText

lnSuccess = 0

loRest = CreateObject('Chilkat.Rest')
lnBTls = 1
lnBAutoReconnect = 1
lnSuccess = loRest.Connect("example.com",443,lnBTls,lnBAutoReconnect)
IF (lnSuccess = 0) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    CANCEL
ENDIF

*  Configure AWS Signature Version 4 request signing.  Provide the access key, secret key, region,
*  and service name.
loAuthAws = CreateObject('Chilkat.AuthAws')
*  Normally you would not hard-code secrets in source.  You should instead obtain them from an
*  interactive prompt, environment variable, or a secrets vault.
loAuthAws.AccessKey = "AWS_ACCESS_KEY"
loAuthAws.SecretKey = "AWS_SECRET_KEY"
loAuthAws.Region = "us-east-1"
loAuthAws.ServiceName = "s3"

*  Associate the provider so Chilkat signs each request according to AWS requirements.
lnSuccess = loRest.SetAuthAws(loAuthAws)
IF (lnSuccess = 0) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loAuthAws
    CANCEL
ENDIF

lcResponseText = loRest.FullRequestNoBody("GET","/")
IF (loRest.LastMethodSuccess = 0) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loAuthAws
    CANCEL
ENDIF

? lcResponseText

RELEASE loRest
RELEASE loAuthAws