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// Package files exposes the workspace file API consumed by the SPA's file
// tree, preview and editor panels: list a directory, search files by name,
// read a text file, stream a file's raw bytes, write a file back.
//
// Access is deliberately unrestricted (absolute paths welcome): ori is meant
// to run inside an already-isolated sandbox, and the agent itself has the
// same reach. Relative paths resolve against the configured root (the --cwd
// given to the agent session).
package files
import (
"encoding/json"
"errors"
"io/fs"
"net/http"
"os"
"path/filepath"
"sort"
"unicode/utf8"
)
// maxFileBytes bounds what the read endpoint returns; larger files are
// refused rather than truncated, so the editor never silently saves a
// partial file back.
const maxFileBytes = 5 << 20 // 5 MiB
// Service answers the file API requests for one workspace root.
type Service struct {
root string
}
// New creates a Service whose relative paths resolve against root.
//
// Example:
//
// svc := files.New("/work/my-project")
// for pattern, handler := range svc.Routes() {
// mux.Handle(pattern, handler)
// }
func New(root string) *Service {
return &Service{root: root}
}
// Routes returns the API endpoints, keyed by http.ServeMux pattern, ready to
// be merged into the server's route table.
func (s *Service) Routes() map[string]http.Handler {
return map[string]http.Handler{
"GET /api/files": http.HandlerFunc(s.listDirectory),
"GET /api/files/search": http.HandlerFunc(s.searchFiles),
"GET /api/file": http.HandlerFunc(s.readFile),
"PUT /api/file": http.HandlerFunc(s.writeFile),
"GET /api/raw": http.HandlerFunc(s.rawFile),
}
}
// Entry describes one child of a listed directory.
type Entry struct {
// Name is the base name of the entry.
Name string `json:"name"`
// Path is the resolved path, directly usable in further API calls.
Path string `json:"path"`
// IsDir tells directories and files apart.
IsDir bool `json:"isDir"`
// Size is the file size in bytes (0 for directories).
Size int64 `json:"size"`
}
// resolve turns a request path into the path to operate on: empty means the
// root, relative paths are joined to it, absolute paths are used as-is.
func (s *Service) resolve(path string) string {
if path == "" {
return s.root
}
if !filepath.IsAbs(path) {
return filepath.Join(s.root, path)
}
return filepath.Clean(path)
}
func (s *Service) listDirectory(w http.ResponseWriter, r *http.Request) {
dir := s.resolve(r.URL.Query().Get("path"))
dirEntries, err := os.ReadDir(dir)
if err != nil {
writeFSError(w, err)
return
}
entries := make([]Entry, 0, len(dirEntries))
for _, e := range dirEntries {
info, infoErr := e.Info()
size := int64(0)
if infoErr == nil && !e.IsDir() {
size = info.Size()
}
entries = append(entries, Entry{
Name: e.Name(),
Path: filepath.Join(dir, e.Name()),
IsDir: e.IsDir(),
Size: size,
})
}
// Directories first, then files, each group alphabetically — the order
// the file tree renders in.
sort.Slice(entries, func(i, j int) bool {
if entries[i].IsDir != entries[j].IsDir {
return entries[i].IsDir
}
return entries[i].Name < entries[j].Name
})
writeJSON(w, http.StatusOK, map[string]any{"path": dir, "entries": entries})
}
func (s *Service) readFile(w http.ResponseWriter, r *http.Request) {
path := s.resolve(r.URL.Query().Get("path"))
info, err := os.Stat(path)
if err != nil {
writeFSError(w, err)
return
}
if info.IsDir() {
writeError(w, http.StatusBadRequest, "path is a directory")
return
}
if info.Size() > maxFileBytes {
writeError(w, http.StatusRequestEntityTooLarge, "file larger than 5 MiB")
return
}
content, err := os.ReadFile(path)
if err != nil {
writeFSError(w, err)
return
}
if !utf8.Valid(content) {
writeError(w, http.StatusUnsupportedMediaType, "not a text file")
return
}
writeJSON(w, http.StatusOK, map[string]any{"path": path, "content": string(content)})
}
func (s *Service) writeFile(w http.ResponseWriter, r *http.Request) {
path := s.resolve(r.URL.Query().Get("path"))
if r.URL.Query().Get("path") == "" {
writeError(w, http.StatusBadRequest, "path query parameter is required")
return
}
var body struct {
Content string `json:"content"`
}
if err := json.NewDecoder(http.MaxBytesReader(w, r.Body, maxFileBytes)).Decode(&body); err != nil {
writeError(w, http.StatusBadRequest, "invalid JSON body: "+err.Error())
return
}
if dir := filepath.Dir(path); dir != "" {
if err := os.MkdirAll(dir, 0o755); err != nil {
writeFSError(w, err)
return
}
}
if err := os.WriteFile(path, []byte(body.Content), 0o644); err != nil {
writeFSError(w, err)
return
}
writeJSON(w, http.StatusOK, map[string]any{"path": path, "status": "saved"})
}
// writeFSError maps filesystem errors to HTTP statuses.
func writeFSError(w http.ResponseWriter, err error) {
status := http.StatusInternalServerError
switch {
case errors.Is(err, fs.ErrNotExist):
status = http.StatusNotFound
case errors.Is(err, fs.ErrPermission):
status = http.StatusForbidden
}
writeError(w, status, err.Error())
}
func writeError(w http.ResponseWriter, status int, message string) {
writeJSON(w, status, map[string]any{"error": message})
}
func writeJSON(w http.ResponseWriter, status int, payload any) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(status)
_ = json.NewEncoder(w).Encode(payload)
}
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