mirror of
https://github.com/OPCFoundation/UA-.NETStandard.git
synced 2026-10-18 22:55:08 +08:00
Marc Schier
a193a0a278
This change introduces two independent additions to the .NET Standard
stack:
## `Libraries/Opc.Ua.Server.FileSystem` (Part 5 §C / Part 20 §4)
Server-side implementation of the OPC UA `FileType` /
`FileDirectoryType` companion model, mirroring the existing client
namespace `Libraries/Opc.Ua.Client.FileSystem`.
### Provider abstraction
- `IFileSystemProvider` — async storage abstraction
(`GetEntryAsync` / `EnumerateAsync` / `OpenRead/WriteAsync` /
`Create{Directory,File}Async` / `DeleteAsync` / `MoveAsync` /
`CopyAsync`). All paths are forward-slash provider-relative; the
empty string is the root.
- `FileSystemEntry` record + `FileWriteMode` enum.
### Default `PhysicalFileSystemProvider`
`System.IO`-based implementation that mounts a **single physical
directory** as the FileSystem root. Rejects path-traversal attempts
(`..` escape) via `Path.GetFullPath` + root-prefix check. Supports
an optional `isWritable: false` mode for read-only mounts.
### Node manager
`FileSystemNodeManager` drives every Browse / Read / Method call
through the configured provider. Each mounted provider is anchored
as a `FileDirectoryType` instance under the standard
`Server.FileSystem` object (`ObjectIds.FileSystem`, `i=16314`)
via `HasComponent`, which is what
`FileSystemClient.OpenServerFileSystem` expects to find. Mount
multiple providers by registering multiple
`FileSystemNodeManager` instances. Companion files
(`DirectoryBrowser`, `DirectoryObjectState`, `FileObjectState`,
`FileHandle`, `FileSystemNodeId`, `FileSystemNodeManagerFactory`)
are all provider-driven.
### Client-side fix
`Libraries/Opc.Ua.Client.FileSystem.FileSystemClient.EnumerateChildrenAsync`
now stops the BrowseNext loop on `continuation.Length == 0` in
addition to `continuation.IsNull`. Without this fix, an
empty-but-non-null ByteString continuation returned by the SDK after
wire round-trip would cause a spurious BrowseNext and fail with
`BadContinuationPointInvalid`.
### Reference-server hook
`Quickstarts.ReferenceServer.ReferenceServer` gains two opt-in
properties (default off):
- `EnableFileSystemNodeManager` — toggles whether the FS node
manager is registered.
- `FileSystemProvider` — caller-supplied
`IFileSystemProvider`. When `null` and the flag is on, falls
back to a `PhysicalFileSystemProvider` rooted at
`%TEMP%/OpcUaReferenceServerFs` (mount name `Temp`).
### Tests
`Tests/Opc.Ua.Client.Tests/FileSystem/FileSystemClientIntegrationTests.cs`
— 12 end-to-end tests over a real
`ServerFixture<ReferenceServer>` + `ClientFixture` (opc.tcp,
SecurityNone, temp-dir provider): round-trip write/read,
enumeration, nested `CreateDirectory` / `CreateSubdirectory`,
delete, move, copy, large-file chunked read, mount BrowseName,
missing path returns null, multi-level enumeration, text round-trip,
read-only provider rejects write.
## `Libraries/Opc.Ua.Lds.Server`
A new Local Discovery Server (LDS) library implementing OPC UA Part
12 §7:
- `LdsServer` — main server class.
- `MulticastDiscovery` — DNS-SD / mDNS bootstrap via
`Makaretu.Dns.Multicast` (version 0.27.0 added to
`Directory.Packages.props`).
- `RegisteredServerStore` — in-memory store with TTL.
- `RegistrationEntry` + `ServerOnNetworkRecord` — value types.
Comes with a sample host `Applications/ConsoleLdsServer`.
## Build / test
- `dotnet build UA.slnx -c Release` -> 0 errors on all target
frameworks (net472, net48, netstandard2.1, net8.0, net9.0, net10.0).
- `Opc.Ua.Server.Tests` -> 964 pass, 5 skip, 0 fail.
- `FileSystemClientIntegrationTests` -> 12/12 pass.
76 lines
2.9 KiB
C#
76 lines
2.9 KiB
C#
/* ========================================================================
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* Copyright (c) 2005-2025 The OPC Foundation, Inc. All rights reserved.
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*
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* OPC Foundation MIT License 1.00
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* The complete license agreement can be found here:
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* http://opcfoundation.org/License/MIT/1.00/
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* ======================================================================*/
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using System;
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namespace Opc.Ua.Server.FileSystem
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{
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/// <summary>
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/// Metadata describing a single entry in an
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/// <see cref="IFileSystemProvider"/>: either a file or a
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/// directory.
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/// </summary>
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/// <param name="Path">
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/// Provider-relative path (forward-slash separated, never starts with a
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/// slash, never ends with a slash except for the root which is an
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/// empty string).
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/// </param>
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/// <param name="Name">
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/// Display / browse name (the last segment of <see cref="Path"/>).
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/// For the root entry this is the provider's
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/// <see cref="IFileSystemProvider.MountName"/>.
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/// </param>
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/// <param name="IsDirectory">
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/// <c>true</c> when the entry represents a directory, <c>false</c>
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/// for a file.
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/// </param>
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/// <param name="Length">
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/// File size in bytes. <c>0</c> for directories.
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/// </param>
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/// <param name="IsWritable">
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/// <c>true</c> when the entry can be written to / modified /
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/// deleted by the current user.
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/// </param>
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/// <param name="LastModifiedUtc">
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/// Last-write timestamp in UTC.
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/// </param>
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/// <param name="MimeType">
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/// IANA media type (best-effort guess from the file extension is
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/// acceptable). Empty string for directories or unknown types.
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/// </param>
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public readonly record struct FileSystemEntry(
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string Path,
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string Name,
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bool IsDirectory,
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long Length,
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bool IsWritable,
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DateTime LastModifiedUtc,
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string MimeType);
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}
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