create webdav -> parent_vfs -> ourdb_vfs example

examples/vfs/example.vsh

@@ -0,0 +1,31 @@
+#!/usr/bin/env -S v -n -w -gc none  -cc tcc -d use_openssl -enable-globals run
+
+import freeflowuniverse.herolib.vfs.webdav
+import freeflowuniverse.herolib.vfs.vfsnested
+import freeflowuniverse.herolib.vfs.ourdb_fs
+
+high_level_vfs := vfsnested.new()
+
+// lower level VFS Implementations that use OurDB
+mut vfs1 := ourdb_fs.new(
+	data_dir: '/tmp/test_webdav_ourdbvfs/vfs1'
+	metadata_dir: '/tmp/test_webdav_ourdbvfs/vfs1'
+)!
+mut vfs2 := ourdb_fs.new(
+	data_dir: '/tmp/test_webdav_ourdbvfs/vfs2'
+	metadata_dir: '/tmp/test_webdav_ourdbvfs/vfs2'
+)!
+mut vfs3 := ourdb_fs.new(
+	data_dir: '/tmp/test_webdav_ourdbvfs/vfs3'
+	metadata_dir: '/tmp/test_webdav_ourdbvfs/vfs3'
+)!
+
+// Nest OurDB VFS instances at different paths
+high_level_vfs.add_vfs('/data', vfs1) or { panic(err) }
+high_level_vfs.add_vfs('/config', vfs2) or { panic(err) }
+high_level_vfs.add_vfs('/data/backup', vfs3) or { panic(err) } // Nested under /data
+
+// Create WebDAV Server that uses high level VFS
+webdav_server := webdav.new_app(
+	vfs: high_level_vfs
+)

lib/vfs/webdav/app.v

@@ -3,6 +3,7 @@ module webdav
 import vweb
 import freeflowuniverse.herolib.core.pathlib
 import freeflowuniverse.herolib.ui.console
+import freeflowuniverse.herolib.vfs.vfscore
 
 @[heap]
 struct App {
@@ -11,6 +12,7 @@ struct App {
 	root_dir pathlib.Path      @[vweb_global]
 pub mut:
 	// lock_manager LockManager
+	vfs VFSImplementation
 	server_port int
 	middlewares map[string][]vweb.Middleware
 }
@@ -21,6 +23,7 @@ pub mut:
 	server_port int = 8080
 	root_dir    string            @[required]
 	user_db     map[string]string @[required]
+	vfs VFSImplementation
 }
 
 pub fn new_app(args AppArgs) !&App {
@@ -29,6 +32,7 @@ pub fn new_app(args AppArgs) !&App {
 		user_db:     args.user_db.clone()
 		root_dir:    root_dir
 		server_port: args.server_port
+		vfs: args.vfs
 	}
 
 	app.middlewares['/'] << logging_middleware

lib/vfs/webdav/methods_vfs.v

@@ -0,0 +1,33 @@
+module webdav
+
+import vweb
+import os
+import freeflowuniverse.herolib.core.pathlib
+import encoding.xml
+import freeflowuniverse.herolib.ui.console
+import net.urllib
+
+@['/:path...'; get]
+fn (mut app App) get_file(path string) vweb.Result {
+	if !app.vfs.exists(path) {
+		return app.not_found()
+	}
+
+	fs_entry := app.vfs.get(path) or {
+		console.print_stderr('failed to get FS Entry ${path}: ${err}')
+		return app.server_error()
+	}
+
+	file_data := app.vfs.file_read(fs_entry.path)
+
+	ext := fs_entry.get_metadata().name.all_after_last('.')
+	content_type := if v := vweb.mime_types[ext] {
+		v
+	} else {
+		'text/plain'
+	}
+
+	app.set_status(200, 'Ok')
+	app.send_response_to_client(content_type, file_data)
+	return vweb.not_found() // this is for returning a dummy result
+}