feat: file manager with browse, search, upload, chmod/chown

- Full file browser page at /files with lazy-load, breadcrumbs, drag&drop - FileBrowserModal component for path selection from Samba/NFS forms - PathField component replaces bare inputs in share/export forms - Backend: /api/files/* routes with List, Mkdir, Rename, Delete, Chmod, Chown, Upload, Download, Preview, Search - Reuses NASCTL_ALLOWED_ROOTS for path validation - NASCTL_UPLOAD_MAX_BYTES (100MB) and NASCTL_PREVIEW_MAX_BYTES (256KB) env vars - Capabilities endpoint returns chmod/chown availability (requires root) - Version bump: 0.3.2 -> 0.4.0
2026-07-06 01:56:40 -04:00
parent 0da789cd96
commit 50ed8abe95
17 changed files with 2209 additions and 30 deletions
@@ -0,0 +1,113 @@
+package files
+
+import (
+	"bytes"
+	"net/http"
+	"path/filepath"
+	"strings"
+)
+
+type PreviewResult struct {
+	Type    string `json:"type"`
+	Content string `json:"content,omitempty"`
+	Mime    string `json:"mime"`
+	Size    int64  `json:"size"`
+}
+
+var textMimes = map[string]bool{
+	"text/plain":                          true,
+	"text/html":                           true,
+	"text/css":                            true,
+	"text/javascript":                     true,
+	"application/json":                    true,
+	"application/xml":                     true,
+	"application/xhtml+xml":               true,
+	"application/javascript":              true,
+}
+
+var imageMimes = map[string]bool{
+	"image/png":  true,
+	"image/jpeg": true,
+	"image/gif":  true,
+	"image/webp": true,
+	"image/svg+xml": true,
+	"image/bmp":  true,
+	"image/tiff": true,
+}
+
+func Preview(path string, max int64, allowedRoots []string) (*PreviewResult, error) {
+	data, err := ReadFile(path, max, allowedRoots)
+	if err != nil {
+		return nil, err
+	}
+
+	mime := http.DetectContentType(data)
+	size := int64(len(data))
+
+	trimmed := bytes.TrimSpace(data)
+	if len(trimmed) > 0 {
+		mime = http.DetectContentType(trimmed)
+	}
+
+	result := &PreviewResult{
+		Mime: mime,
+		Size: size,
+	}
+
+	if imageMimes[mime] || strings.HasPrefix(mime, "image/") {
+		result.Type = "image"
+		return result, nil
+	}
+
+	if textMimes[mime] || strings.HasPrefix(mime, "text/") || isLikelyText(trimmed) {
+		result.Type = "text"
+		if size > 0 {
+			result.Content = string(data)
+			if int64(len(result.Content)) > max {
+				result.Content = result.Content[:max]
+			}
+		}
+		return result, nil
+	}
+
+	result.Type = "binary"
+	return result, nil
+}
+
+func isLikelyText(data []byte) bool {
+	if len(data) == 0 {
+		return false
+	}
+	nulls := 0
+	for _, b := range data {
+		gb := int(b)
+		if (gb < 32 && gb != 9 && gb != 10 && gb != 13) || gb == 127 {
+			nulls++
+		}
+	}
+	return float64(nulls)/float64(len(data)) < 0.1
+}
+
+func ExtensionIcon(name string) string {
+	ext := strings.ToLower(filepath.Ext(name))
+	switch ext {
+	case ".png", ".jpg", ".jpeg", ".gif", ".webp", ".svg", ".bmp", ".ico":
+		return "image"
+	case ".mp4", ".avi", ".mkv", ".mov", ".wmv", ".flv", ".webm":
+		return "video"
+	case ".mp3", ".wav", ".ogg", ".flac", ".aac", ".wma":
+		return "audio"
+	case ".zip", ".tar", ".gz", ".bz2", ".xz", ".rar", ".7z":
+		return "archive"
+	case ".pdf":
+		return "pdf"
+	case ".doc", ".docx", ".odt", ".rtf":
+		return "word"
+	case ".xls", ".xlsx", ".csv", ".ods":
+		return "spreadsheet"
+	case ".txt", ".md", ".log", ".cfg", ".conf", ".ini", ".yaml", ".yml", ".toml", ".json", ".xml":
+		return "text"
+	default:
+		return "file"
+	}
+}