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package bootstrap
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import (
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"bufio"
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"encoding/json"
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"io"
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"io/fs"
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"net/http"
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"path/filepath"
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"github.com/pkg/errors"
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"github.com/cloudreve/Cloudreve/v3/pkg/conf"
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"github.com/cloudreve/Cloudreve/v3/pkg/util"
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"github.com/gin-contrib/static"
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)
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const StaticFolder = "statics"
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type GinFS struct {
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FS http.FileSystem
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}
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type staticVersion struct {
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Name string `json:"name"`
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Version string `json:"version"`
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}
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// StaticFS 内置静态文件资源
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var StaticFS static.ServeFileSystem
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// Open 打开文件
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func (b *GinFS) Open(name string) (http.File, error) {
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return b.FS.Open(name)
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}
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// Exists 文件是否存在
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func (b *GinFS) Exists(prefix string, filepath string) bool {
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if _, err := b.FS.Open(filepath); err != nil {
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return false
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}
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return true
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}
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// InitStatic 初始化静态资源文件
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func InitStatic(statics fs.FS) {
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if util.Exists(util.RelativePath(StaticFolder)) {
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util.Log().Info("Folder with name \"statics\" already exists, it will be used to serve static files.")
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StaticFS = static.LocalFile(util.RelativePath("statics"), false)
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} else {
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// 初始化静态资源
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embedFS, err := fs.Sub(statics, "assets/build")
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if err != nil {
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util.Log().Panic("Failed to initialize static resources: %s", err)
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}
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StaticFS = &GinFS{
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FS: http.FS(embedFS),
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}
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}
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// 检查静态资源的版本
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f, err := StaticFS.Open("version.json")
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if err != nil {
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util.Log().Warning("Missing version identifier file in static resources, please delete \"statics\" folder and rebuild it.")
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return
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}
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b, err := io.ReadAll(f)
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if err != nil {
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util.Log().Warning("Failed to read version identifier file in static resources, please delete \"statics\" folder and rebuild it.")
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return
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}
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var v staticVersion
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if err := json.Unmarshal(b, &v); err != nil {
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util.Log().Warning("Failed to parse version identifier file in static resources: %s", err)
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return
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}
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staticName := "cloudreve-frontend"
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if conf.IsPro == "true" {
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staticName += "-pro"
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}
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if v.Name != staticName {
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util.Log().Warning("Static resource version mismatch, please delete \"statics\" folder and rebuild it.")
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return
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}
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if v.Version != conf.RequiredStaticVersion {
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util.Log().Warning("Static resource version mismatch [Current %s, Desired: %s]，please delete \"statics\" folder and rebuild it.", v.Version, conf.RequiredStaticVersion)
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return
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}
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}
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// Eject 抽离内置静态资源
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func Eject(statics fs.FS) {
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// 初始化静态资源
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embedFS, err := fs.Sub(statics, "assets/build")
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if err != nil {
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util.Log().Panic("Failed to initialize static resources: %s", err)
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}
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var walk func(relPath string, d fs.DirEntry, err error) error
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walk = func(relPath string, d fs.DirEntry, err error) error {
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if err != nil {
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return errors.Errorf("Failed to read info of %q: %s, skipping...", relPath, err)
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}
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if !d.IsDir() {
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// 写入文件
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out, err := util.CreatNestedFile(filepath.Join(util.RelativePath(""), StaticFolder, relPath))
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defer out.Close()
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if err != nil {
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return errors.Errorf("Failed to create file %q: %s, skipping...", relPath, err)
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}
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util.Log().Info("Ejecting %q...", relPath)
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obj, _ := embedFS.Open(relPath)
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if _, err := io.Copy(out, bufio.NewReader(obj)); err != nil {
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return errors.Errorf("Cannot write file %q: %s, skipping...", relPath, err)
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}
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}
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return nil
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}
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// util.Log().Info("开始导出内置静态资源...")
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err = fs.WalkDir(embedFS, ".", walk)
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if err != nil {
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util.Log().Error("Error occurs while ejecting static resources: %s", err)
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return
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}
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util.Log().Info("Finish ejecting static resources.")
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}
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