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aws_sign.go
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aws_sign.go
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package awssign
import (
"bytes"
"fmt"
"io"
"net/http"
"os"
"time"
"github.com/aws/aws-sdk-go/aws/credentials"
v4 "github.com/aws/aws-sdk-go/aws/signer/v4"
"github.com/stackql/stackql/internal/stackql/logging"
)
var (
_ Transport = &standardAwsSignTransport{}
)
type Transport interface {
RoundTrip(req *http.Request) (*http.Response, error)
}
type standardAwsSignTransport struct {
underlyingTransport http.RoundTripper
signer *v4.Signer
}
func NewAwsSignTransport(
underlyingTransport http.RoundTripper,
id, secret, token string,
options ...func(*v4.Signer),
) (Transport, error) {
var creds *credentials.Credentials
if token == "" {
creds = credentials.NewStaticCredentials(id, secret, token)
} else {
defaultAccessKeyID := os.Getenv("AWS_ACCESS_KEY_ID")
defaultSecretAccessKey := os.Getenv("AWS_SECRET_ACCESS_KEY")
if defaultAccessKeyID == "" || defaultSecretAccessKey == "" {
return nil, fmt.Errorf("AWS_SESSION_TOKEN is set, but AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY must also be set")
}
creds = credentials.NewEnvCredentials()
}
signer := v4.NewSigner(creds, options...)
return &standardAwsSignTransport{
underlyingTransport: underlyingTransport,
signer: signer,
}, nil
}
func (t *standardAwsSignTransport) RoundTrip(req *http.Request) (*http.Response, error) {
svc := req.Context().Value("service")
if svc == nil {
return nil, fmt.Errorf("AWS service is nil")
}
rgn := req.Context().Value("region")
if rgn == nil {
return nil, fmt.Errorf("AWS region is nil")
}
svcStr, ok := svc.(string)
if !ok {
return nil, fmt.Errorf("unsupported type for AWS service: '%T'", svc)
}
rgnStr, ok := rgn.(string)
if !ok {
return nil, fmt.Errorf("unsupported type for AWS region: '%T'", rgn)
}
var rs io.ReadSeeker
if req.Body != nil {
body, err := io.ReadAll(req.Body)
if err != nil {
return nil, err
}
rs = bytes.NewReader(body)
req.Body = nil
}
header, err := t.signer.Sign(
req,
rs,
svcStr,
rgnStr,
time.Now(),
)
logging.GetLogger().Infof("header = %v\n", header)
if err != nil {
return nil, err
}
return t.underlyingTransport.RoundTrip(req)
}