frostfs-s3-gw/api/auth/presign.go

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package auth
import (
"fmt"
"net/http"
"strings"
"time"
v4 "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth/signer/v4"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/private/protocol/rest"
)
type RequestData struct {
Method string
Endpoint string
Bucket string
Object string
}
type PresignData struct {
Service string
Region string
Lifetime time.Duration
SignTime time.Time
}
// PresignRequest forms pre-signed request to access objects without aws credentials.
func PresignRequest(creds *credentials.Credentials, reqData RequestData, presignData PresignData) (*http.Request, error) {
urlStr := fmt.Sprintf("%s/%s/%s", reqData.Endpoint, rest.EscapePath(reqData.Bucket, false), rest.EscapePath(reqData.Object, false))
req, err := http.NewRequest(strings.ToUpper(reqData.Method), urlStr, nil)
if err != nil {
return nil, fmt.Errorf("failed to create new request: %w", err)
}
req.Header.Set(AmzDate, presignData.SignTime.Format("20060102T150405Z"))
req.Header.Set(ContentTypeHdr, "text/plain")
signer := v4.NewSigner(creds)
signer.DisableURIPathEscaping = true
if _, err = signer.Presign(req, nil, presignData.Service, presignData.Region, presignData.Lifetime, presignData.SignTime); err != nil {
return nil, fmt.Errorf("presign: %w", err)
}
return req, nil
}