revert replacing awserr with smithy-go

Author: Hongyu Zhou

go.mod

@@ -9,7 +9,6 @@ require (
 	github.com/aws/aws-sdk-go-v2/config v1.18.32
 	github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.11.73
 	github.com/aws/aws-sdk-go-v2/service/s3 v1.37.0
-	github.com/aws/smithy-go v1.14.0
 	github.com/fsnotify/fsnotify v1.5.1
 	github.com/go-sql-driver/mysql v1.4.1
 	github.com/google/go-cmp v0.5.8
@@ -43,6 +42,7 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/sso v1.13.1 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.15.1 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sts v1.21.1 // indirect
+	github.com/aws/smithy-go v1.14.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/klauspost/compress v1.16.7 // indirect

pkg/reflector/download.go

@@ -3,9 +3,9 @@ package reflector
 import (
 	"bytes"
 	"context"
-	er "errors"
 	"fmt"
 	"io"
+	"net/http"
 	"os"
 	"strings"
 	"time"
@@ -14,8 +14,7 @@ import (
 	"github.com/aws/aws-sdk-go-v2/config"
 	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
 	"github.com/aws/aws-sdk-go-v2/service/s3"
-	"github.com/aws/aws-sdk-go-v2/service/s3/types"
-	"github.com/aws/smithy-go"
+	"github.com/aws/aws-sdk-go/aws/awserr"
 	gzip "github.com/klauspost/pgzip"
 
 	"github.com/segmentio/ctlstore/pkg/errs"
@@ -61,14 +60,11 @@ func (d *S3Downloader) DownloadTo(w io.Writer) (n int64, err error) {
 	stats.Observe("snapshot_download_time", time.Now().Sub(start))
 
 	if err != nil {
-		var apiErr smithy.APIError
-		if er.As(err, &apiErr) {
-			switch apiErr.(type) {
-			case *types.NotFound:
-				if d.StartOverOnNotFound {
-					// don't bother retrying. we'll start with a fresh ldb.
-					return -1, errors.WithTypes(errors.Wrap(err, "get s3 data"), errs.ErrTypePermanent)
-				}
+		switch err := err.(type) {
+		case awserr.RequestFailure:
+			if d.StartOverOnNotFound && err.StatusCode() == http.StatusNotFound {
+				// don't bother retrying. we'll start with a fresh ldb.
+				return -1, errors.WithTypes(errors.Wrap(err, "get s3 data"), errs.ErrTypePermanent)
 			}
 		}
 		// retry