webp_server_go/helper/metadata.go
Benny a7b5992662
Metadata (#251)
* recover middleware

* simplify Atoi

* metadata data prototype

* InterestingAttention

* resize itself

* Bump version to 0.9.4
Added some comments
Removed String() for Extraparams

* Add metadata test

* Fix CI

* Remove unnecessary tests

* Update file count

* use t.Run to get test case

---------

Co-authored-by: n0vad3v <n0vad3v@riseup.net>
2023-07-11 19:08:32 +02:00

71 lines
1.8 KiB
Go

package helper
import (
"encoding/json"
"net/url"
"os"
"path"
"webp_server_go/config"
log "github.com/sirupsen/logrus"
)
func getId(p string) (string, string, string) {
var id string
if config.ProxyMode {
return HashString(p), "", ""
}
parsed, _ := url.Parse(p)
width := parsed.Query().Get("width")
height := parsed.Query().Get("height")
// santizedPath will be /webp_server.jpg?width=200\u0026height= in local mode when requesting /webp_server.jpg?width=200
// santizedPath will be https://docs.webp.sh/images/webp_server.jpg?width=400 in proxy mode when requesting /images/webp_server.jpg?width=400 with IMG_PATH = https://docs.webp.sh
santizedPath := parsed.Path + "?width=" + width + "&height=" + height
id = HashString(santizedPath)
return id, path.Join(config.Config.ImgPath, parsed.Path), santizedPath
}
func ReadMetadata(p, etag string) config.MetaFile {
// try to read metadata, if we can't read, create one
var metadata config.MetaFile
var id, _, _ = getId(p)
buf, err := os.ReadFile(path.Join(config.Metadata, id+".json"))
if err != nil {
log.Warnf("can't read metadata: %s", err)
WriteMetadata(p, etag)
return ReadMetadata(p, etag)
}
err = json.Unmarshal(buf, &metadata)
if err != nil {
log.Warnf("unmarshal metadata error, possible corrupt file, re-building...: %s", err)
WriteMetadata(p, etag)
return ReadMetadata(p, etag)
}
return metadata
}
func WriteMetadata(p, etag string) config.MetaFile {
_ = os.Mkdir(config.Metadata, 0755)
var id, filepath, sant = getId(p)
var data = config.MetaFile{
Id: id,
}
if config.ProxyMode {
data.Path = p
data.Checksum = HashString(etag)
} else {
data.Path = sant
data.Checksum = HashFile(filepath)
}
buf, _ := json.Marshal(data)
_ = os.WriteFile(path.Join(config.Metadata, data.Id+".json"), buf, 0644)
return data
}