66 lines
1.4 KiB
Go
66 lines
1.4 KiB
Go
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package store
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import (
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"context"
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"io/ioutil"
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"os"
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"path"
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"go-common/library/log"
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"github.com/pkg/errors"
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)
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// FileConfig config of File.
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type FileConfig struct {
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RootDir string
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}
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// File is a degrade file service.
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type File struct {
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c *FileConfig
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}
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var _ Store = &File{}
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// NewFile new a file degrade service.
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func NewFile(fc *FileConfig) *File {
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if fc == nil {
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panic(errors.New("file config is nil"))
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}
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fs := &File{c: fc}
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if err := os.MkdirAll(fs.c.RootDir, 0755); err != nil {
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panic(errors.Wrapf(err, "dir: %s", fs.c.RootDir))
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}
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return fs
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}
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// Set save the result of location to file.
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// expire is not implemented in file storage.
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func (fs *File) Set(ctx context.Context, key string, bs []byte, _ int32) (err error) {
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file := path.Join(fs.c.RootDir, key)
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tmp := file + ".tmp"
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if err = ioutil.WriteFile(tmp, bs, 0644); err != nil {
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log.Error("ioutil.WriteFile(%s, bs, 0644): error(%v)", tmp, err)
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err = errors.Wrapf(err, "key: %s", key)
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return
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}
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if err = os.Rename(tmp, file); err != nil {
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log.Error("os.Rename(%s, %s): error(%v)", tmp, file, err)
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err = errors.Wrapf(err, "key: %s", key)
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return
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}
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return
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}
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// Get get result from file by locaiton+params.
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func (fs *File) Get(ctx context.Context, key string) (bs []byte, err error) {
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p := path.Join(fs.c.RootDir, key)
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if bs, err = ioutil.ReadFile(p); err != nil {
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log.Error("ioutil.ReadFile(%s): error(%v)", p, err)
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err = errors.Wrapf(err, "key: %s", key)
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return
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}
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return
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}
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