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Removing Exists() check from S3 getters (#1842)

Browse Source 
* Atomic access to S3

* fixing linting errors

* make delete return KindNotFound

* restore checker and deleter
This commit is contained in:
Zhongpeng Lin
2023-03-03 19:46:09 -08:00
committed by GitHub
parent 1f0a460687
commit 5099b30ac6
2 changed files with 18 additions and 22 deletions
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pkg/storage/s3/getter.go
+18 -21
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@@ -2,10 +2,12 @@ package s3
import (
"context"
errs "errors"
"fmt"
"io"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/gomods/athens/pkg/config"
"github.com/gomods/athens/pkg/errors"
@@ -18,16 +20,13 @@ func (s *Storage) Info(ctx context.Context, module, version string) ([]byte, err
const op errors.Op = "s3.Info"
ctx, span := observ.StartSpan(ctx, op.String())
defer span.End()
exists, err := s.Exists(ctx, module, version)
if err != nil {
return nil, errors.E(op, err, errors.M(module), errors.V(version))
}
if !exists {
return nil, errors.E(op, errors.M(module), errors.V(version), errors.KindNotFound)
}
infoReader, err := s.open(ctx, config.PackageVersionedName(module, version, "info"))
if err != nil {
var aerr awserr.Error
if errs.As(err, &aerr) && aerr.Code() == s3.ErrCodeNoSuchKey {
return nil, errors.E(op, errors.M(module), errors.V(version), errors.KindNotFound)
}
return nil, errors.E(op, err, errors.M(module), errors.V(version))
}
defer func() { _ = infoReader.Close() }()
@@ -44,16 +43,13 @@ func (s *Storage) GoMod(ctx context.Context, module, version string) ([]byte, er
const op errors.Op = "s3.GoMod"
ctx, span := observ.StartSpan(ctx, op.String())
defer span.End()
exists, err := s.Exists(ctx, module, version)
if err != nil {
return nil, errors.E(op, err, errors.M(module), errors.V(version))
}
if !exists {
return nil, errors.E(op, errors.M(module), errors.V(version), errors.KindNotFound)
}
modReader, err := s.open(ctx, config.PackageVersionedName(module, version, "mod"))
if err != nil {
var aerr awserr.Error
if errs.As(err, &aerr) && aerr.Code() == s3.ErrCodeNoSuchKey {
return nil, errors.E(op, errors.M(module), errors.V(version), errors.KindNotFound)
}
return nil, errors.E(op, err, errors.M(module), errors.V(version))
}
defer func() { _ = modReader.Close() }()
@@ -71,16 +67,13 @@ func (s *Storage) Zip(ctx context.Context, module, version string) (storage.Size
const op errors.Op = "s3.Zip"
ctx, span := observ.StartSpan(ctx, op.String())
defer span.End()
exists, err := s.Exists(ctx, module, version)
if err != nil {
return nil, errors.E(op, err, errors.M(module), errors.V(version))
}
if !exists {
return nil, errors.E(op, errors.M(module), errors.V(version), errors.KindNotFound)
}
zipReader, err := s.open(ctx, config.PackageVersionedName(module, version, "zip"))
if err != nil {
var aerr awserr.Error
if errs.As(err, &aerr) && aerr.Code() == s3.ErrCodeNoSuchKey {
return nil, errors.E(op, errors.M(module), errors.V(version), errors.KindNotFound)
}
return nil, errors.E(op, err, errors.M(module), errors.V(version))
}
@@ -98,6 +91,10 @@ func (s *Storage) open(ctx context.Context, path string) (storage.SizeReadCloser
goo, err := s.s3API.GetObjectWithContext(ctx, getParams)
if err != nil {
var aerr awserr.Error
if errs.As(err, &aerr) && aerr.Code() == s3.ErrCodeNoSuchKey {
return nil, errors.E(op, errors.KindNotFound)
}
return nil, errors.E(op, err)
}
var size int64