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// Copyright 2022 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package asset
import (
"fmt"
"strings"
"time"
"github.com/google/syzkaller/pkg/gcs"
)
type objectUploadCallback func(req *uploadRequest) (*uploadResponse, error)
type objectRemoveCallback func(url string) error
type dummyObject struct {
createdAt time.Time
contentType string
contentEncoding string
}
type dummyStorageBackend struct {
currentTime time.Time
objects map[string]*dummyObject
objectUpload objectUploadCallback
objectRemove objectRemoveCallback
}
func makeDummyStorageBackend() *dummyStorageBackend {
return &dummyStorageBackend{
currentTime: time.Now(),
objects: make(map[string]*dummyObject),
}
}
type dummyWriteCloser struct {
}
func (dwc *dummyWriteCloser) Write(p []byte) (int, error) {
return len(p), nil
}
func (dwc *dummyWriteCloser) Close() error {
return nil
}
func (be *dummyStorageBackend) upload(req *uploadRequest) (*uploadResponse, error) {
be.objects[req.savePath] = &dummyObject{
createdAt: be.currentTime,
contentType: req.contentType,
contentEncoding: req.contentEncoding,
}
if be.objectUpload != nil {
return be.objectUpload(req)
}
return &uploadResponse{writer: &dummyWriteCloser{}, path: req.savePath}, nil
}
func (be *dummyStorageBackend) downloadURL(path string, publicURL bool) (string, error) {
return "http://download/" + path, nil
}
func (be *dummyStorageBackend) getPath(url string) (string, error) {
if strings.HasPrefix(url, "http://unknown-bucket/") {
return "", ErrUnknownBucket
}
if strings.HasPrefix(url, "http://download/") {
return strings.TrimPrefix(url, "http://download/"), nil
}
return "", fmt.Errorf("unknown URL format")
}
func (be *dummyStorageBackend) list() ([]*gcs.Object, error) {
ret := []*gcs.Object{}
for path, obj := range be.objects {
ret = append(ret, &gcs.Object{
Path: path,
CreatedAt: obj.createdAt,
})
}
return ret, nil
}
func (be *dummyStorageBackend) remove(path string) error {
if be.objectRemove != nil {
if err := be.objectRemove(path); err != nil {
return err
}
}
if _, ok := be.objects[path]; !ok {
return ErrAssetDoesNotExist
}
delete(be.objects, path)
return nil
}
func (be *dummyStorageBackend) hasOnly(paths []string) error {
makeError := func() error {
return fmt.Errorf("object sets are not equal; needed: %#v; uploaded: %#v", paths, be.objects)
}
if len(paths) != len(be.objects) {
return makeError()
}
for _, path := range paths {
if be.objects[path] == nil {
return makeError()
}
}
return nil
}
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