Show HTML pages in a task view beside the transcript

internal/server/files.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
+	"mime"
 	"net/http"
 	"os"
 	"path"
@@ -215,6 +216,55 @@ func (s *Server) GetTaskFile(w http.ResponseWriter, r *http.Request, taskID stri
 	writeJSON(w, http.StatusOK, fc)
 }
 
+func (s *Server) GetTaskRaw(w http.ResponseWriter, r *http.Request, taskID string, params api.GetTaskRawParams) {
+	t, ok := s.activeTask(w, r, taskID)
+	if !ok {
+		return
+	}
+	if params.Path == "" {
+		writeError(w, http.StatusBadRequest, errors.New("path is required"))
+		return
+	}
+	name, ok := worktreeName(w, params.Path)
+	if !ok {
+		return
+	}
+
+	root, err := os.OpenRoot(t.WorktreePath)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, err)
+		return
+	}
+	defer root.Close()
+
+	f, err := root.Open(name)
+	if err != nil {
+		writePathError(w, err)
+		return
+	}
+	defer f.Close()
+
+	fi, err := f.Stat()
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, err)
+		return
+	}
+	if !fi.Mode().IsRegular() {
+		writeError(w, http.StatusBadRequest, fmt.Errorf("%s is not a regular file", params.Path))
+		return
+	}
+
+	contentType := mime.TypeByExtension(path.Ext(name))
+	if contentType == "" {
+		contentType = "application/octet-stream"
+	}
+	w.Header().Set("Content-Type", contentType)
+	w.Header().Set("X-Content-Type-Options", "nosniff")
+	w.Header().Set("Content-Security-Policy", "sandbox")
+	w.Header().Set("Cache-Control", "private, no-cache")
+	http.ServeContent(w, r, "", fi.ModTime(), f)
+}
+
 func worktreeName(w http.ResponseWriter, rel string) (string, bool) {
 	if rel == "" {
 		return ".", true