B4X

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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Dim success As Boolean = False

Dim rest As ChilkatRest
rest.Initialize("rest")
Dim bTls As Boolean = True
Dim bAutoReconnect As Boolean = True
success = rest.Connect("example.com", 443, bTls, bAutoReconnect)
If success = False Then
    Log(rest.LastErrorText)
    Return
End If


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

'  Associate the provider so Chilkat signs each request according to AWS requirements.
success = rest.SetAuthAws(authAws)
If success = False Then
    Log(rest.LastErrorText)
    Return
End If


Dim responseText As String = rest.FullRequestNoBody("GET", "/")
If rest.LastMethodSuccess = False Then
    Log(rest.LastErrorText)
    Return
End If

Log(responseText)