chore: bootstrap CHFS NG workspace

chfs-ng/cmd/chfs/main.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	"chfs-ng/internal/api"
+	"chfs-ng/internal/storage"
+	"log"
+	"net/http"
+)
+
+func main() {
+	s := &api.Server{Store: storage.Local{Root: "/data"}}
+	log.Println("chfs-ng development server listening on :80")
+	log.Fatal(http.ListenAndServe(":80", s.Handler()))
+}

chfs-ng/go.mod

@@ -0,0 +1,3 @@
+module chfs-ng
+
+go 1.22

chfs-ng/internal/api/server.go

@@ -0,0 +1,26 @@
+package api
+
+import (
+	"chfs-ng/internal/storage"
+	"net/http"
+)
+
+type Server struct{ Store storage.Storage }
+
+func (s *Server) Handler() http.Handler {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/chfs/files", s.files)
+	mux.HandleFunc("/chfs/newdir", s.newdir)
+	mux.HandleFunc("/chfs/rename", s.rename)
+	mux.HandleFunc("/chfs/rmfiles", s.remove)
+	mux.HandleFunc("/chfs/exist", s.exist)
+	mux.HandleFunc("/chfs/session", s.session)
+	return mux
+}
+func notImpl(w http.ResponseWriter)                              { http.Error(w, "not implemented", http.StatusNotImplemented) }
+func (s *Server) files(w http.ResponseWriter, r *http.Request)   { notImpl(w) }
+func (s *Server) newdir(w http.ResponseWriter, r *http.Request)  { notImpl(w) }
+func (s *Server) rename(w http.ResponseWriter, r *http.Request)  { notImpl(w) }
+func (s *Server) remove(w http.ResponseWriter, r *http.Request)  { notImpl(w) }
+func (s *Server) exist(w http.ResponseWriter, r *http.Request)   { notImpl(w) }
+func (s *Server) session(w http.ResponseWriter, r *http.Request) { notImpl(w) }

chfs-ng/internal/auth/auth.go

@@ -0,0 +1,19 @@
+package auth
+
+type PermMask uint8
+
+const (
+	None PermMask = 0
+	Read PermMask = 1 << iota
+	Write
+	Delete
+)
+
+func (p PermMask) HasRead() bool   { return p&Read != 0 }
+func (p PermMask) HasWrite() bool  { return p&Write != 0 }
+func (p PermMask) HasDelete() bool { return p&Delete != 0 }
+
+type Account struct {
+	Username, Password string
+	Mask               PermMask
+}

chfs-ng/internal/storage/storage.go

@@ -0,0 +1,40 @@
+package storage
+
+import (
+	"os"
+	"path/filepath"
+)
+
+type Storage interface {
+	Stat(path string) (os.FileInfo, error)
+	Open(path string) (*os.File, error)
+	Create(path string) (*os.File, error)
+	Remove(path string) error
+	Rename(oldPath, newPath string) error
+	MkdirAll(path string) error
+	List(path string) ([]os.FileInfo, error)
+}
+
+type Local struct{ Root string }
+
+func (s Local) real(path string) string               { return filepath.Join(s.Root, filepath.Clean("/"+path)) }
+func (s Local) Stat(path string) (os.FileInfo, error) { return os.Stat(s.real(path)) }
+func (s Local) Open(path string) (*os.File, error)    { return os.Open(s.real(path)) }
+func (s Local) Create(path string) (*os.File, error) {
+	p := s.real(path)
+	if err := os.MkdirAll(filepath.Dir(p), 0755); err != nil {
+		return nil, err
+	}
+	return os.Create(p)
+}
+func (s Local) Remove(path string) error   { return os.RemoveAll(s.real(path)) }
+func (s Local) Rename(a, b string) error   { return os.Rename(s.real(a), s.real(b)) }
+func (s Local) MkdirAll(path string) error { return os.MkdirAll(s.real(path), 0755) }
+func (s Local) List(path string) ([]os.FileInfo, error) {
+	f, err := os.Open(s.real(path))
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+	return f.Readdir(-1)
+}

compatibility/api-v1.md

@@ -0,0 +1,17 @@
+# CHFS v1 compatibility surface
+
+Keep legacy endpoints stable during migration.
+
+- session: login/logout
+- files: directory listing
+- shared: direct file access
+- newdir: create directory
+- rename: rename file/directory
+- rmfiles: delete
+- search: global search
+- upload/upload2: upload
+- newtext/updatetext: text file editing
+- preview: preview
+- exist: existence check
+- downloaddir: ZIP directory download
+- webdav: WebDAV

compatibility/config-v1.md

@@ -0,0 +1,18 @@
+# Known legacy configuration
+
+path=/data
+image.preview=true
+file.remove=3
+
+Known additional keys from binary/config ecosystem:
+session.timeout
+folder.download
+folder.leaf.download
+rule.default
+rule.r
+rule.w
+rule.d
+html.title
+html.notice
+ssl.cert
+ssl.key

original/chfs-v4.0beta.min.ini

@@ -0,0 +1,3 @@
+path=/data
+image.preview=true
+file.remove=3

reverse/architecture.md

@@ -0,0 +1,20 @@
+# CHFS v4 reverse engineering notes
+
+Base image: docblue/chfs:v4.0beta.min
+Go: 1.18.1
+Build revision: c430c39551e5e2e5c18aa57cdcc734814f795e4e
+Build time: 2024-11-14T13:41:08Z
+vcs.modified=true
+
+Recovered modules:
+- chfs/account: account, permission, token
+- chfs/homedir
+- chfs/mylog/ops
+- chfs/util/pajfile
+- main: HTTP handlers, configuration, MulPathMgr, WebDAV, ignore filtering
+- webdav: embedded WebDAV implementation
+
+Recovered HTTP endpoints include:
+/chfs/session /chfs/files /chfs/newdir /chfs/rename /chfs/search /chfs/shared
+/chfs/upload /chfs/upload2 /chfs/newtext /chfs/preview /chfs/rmfiles
+/chfs/updatetext /chfs/exist /chfs/downloaddir/ /webdav

reverse/functions.txt

@@ -0,0 +1,100 @@
+main
+chfs/account
+chfs/account.init.0
+chfs/account.HasAccount
+chfs/account.HasAccount.func1
+chfs/account.AddAccount
+chfs/account.ValidateAccount
+chfs/account.ValidateAccount.func1
+chfs/account.ValidatePermMask
+chfs/account.PermMask.HasNonePermission
+chfs/account.PermMask.HasReadPermission
+chfs/account.PermMask.HasWritePermission
+chfs/account.PermMask.HasDeletePermission
+chfs/account.AccessMask
+chfs/account.AccessMask.func1
+chfs/account.CreateToken
+chfs/account.GetAccFromToken.func1
+chfs/account.GetAccFromToken
+chfs/account.GetAccFromToken.func2
+chfs/account.(*PermMask).HasDeletePermission
+chfs/account.(*PermMask).HasNonePermission
+chfs/account.(*PermMask).HasReadPermission
+chfs/account.(*PermMask).HasWritePermission
+chfs/homedir.Dir
+chfs/homedir.dirUnix
+chfs/icons.GetFileIcon
+chfs/mylog/ops.InitOpsLog
+chfs/mylog/ops.Output
+chfs/mylog/ops.Output.func1
+chfs/util/pajfile.IsFilePathExist
+main.parseAllowAddresses
+main.addIP
+main.checkIPisAllow
+main.login
+main.getTokenFromCookies
+main.logout
+main.createZipImpl
+main.createZipImpl.func1
+main.(*GitIgnore).MatchesPath
+main.downloadDir
+main.listfile
+main.listfile.func2
+main.listfile.func1
+main.deletefile
+main.deletefile.func1
+main.rename
+main.createDir
+main.newtext
+main.updatetext
+main.upload2
+main.upload2.func4
+main.upload2.func3
+main.upload2.func2
+main.upload2.func1
+main.upload
+main.upload.func4
+main.upload.func3
+main.upload.func2
+main.upload.func1
+main.isexist
+main.responseError
+main.previewHandler.func1
+main.previewHandler
+main.previewHandler.func2
+main.search
+main.search.func2
+main.search.func1
+main.parseConfigurationFile
+main.report
+main.report.func1
+main.init.0
+main.CompileIgnoreLines
+main.getPatternFromLine
+main.(*GitIgnore).matchesPathHow
+main.main.func1
+main.main
+main.main.func3
+main.main.func2
+main.(*filterRouter).ServeHTTP
+main.checkIPv4
+main.compareVer
+main.splitArray2Rows
+main.myRender
+main.myRender.func1
+main.getLocalIPs
+main.makeSites
+main.getLatestVerFromServer
+main.clientIP
+main.whoami
+main.parseCLI
+main.initMulPathMgr
+main.(*MulPathMgr).Find
+main.(*MulPathMgr).extractFileName
+main.(*MulPathMgr).realPath
+main.(*MulPathMgr).matched
+main.(*MulPathMgr).realPathForFile
+main.(*MulPathMgr).peelRealRootPath
+main.(*MulPathMgr).subRealRootPath
+main.webdavHandler
+main.init