c95824a65d
Full read-only SDK (src/AVEVA.Historian.Client) implementing the CLAUDE.md required
surface against AVEVA Historian's binary WCF protocol — no native AVEVA runtime
dependency. All operations live-verified against a local Historian:
- ProbeAsync, ReadRawAsync, ReadAggregateAsync, ReadAtTimeAsync, ReadEventsAsync
- BrowseTagNamesAsync, GetTagMetadataAsync (17 native data-type codes mapped)
- GetConnectionStatusAsync, GetStoreForwardStatusAsync, GetSystemParameterAsync
- 108/108 unit + integration tests pass
Includes the reverse-engineering toolkit (tools/AVEVA.Historian.ReverseEngineering)
used to decode the protocol: WCF probes, IL inspection via dnlib, and IL-rewrite
instrumentation (instrument-wcf-{write,read}message etc.) plus the .NET Framework
trace harness (tools/AVEVA.Historian.NativeTraceHarness) for parity testing.
Sanitized handoff evidence under docs/reverse-engineering/. Native AVEVA binaries
(current/, aveva-install-x64/, aveva-install-x86/) are gitignored — fetch separately
from the AVEVA installer.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
52 lines
1.6 KiB
C#
52 lines
1.6 KiB
C#
using System.ServiceModel.Channels;
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namespace AVEVA.Historian.Client.Wcf;
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internal sealed class MdasMessageEncoder : MessageEncoder
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{
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public const string MdasContentType = "application/x-mdas";
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private readonly MessageEncoder inner;
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public MdasMessageEncoder(MessageEncoder inner)
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{
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this.inner = inner ?? throw new ArgumentNullException(nameof(inner));
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}
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public override string ContentType => MdasContentType;
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public override string MediaType => MdasContentType;
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public override MessageVersion MessageVersion => inner.MessageVersion;
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public override bool IsContentTypeSupported(string contentType)
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{
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return contentType.StartsWith(MdasContentType, StringComparison.OrdinalIgnoreCase)
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|| inner.IsContentTypeSupported(contentType);
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}
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public override Message ReadMessage(ArraySegment<byte> buffer, BufferManager bufferManager, string contentType)
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{
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return inner.ReadMessage(buffer, bufferManager, inner.ContentType);
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}
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public override Message ReadMessage(Stream stream, int maxSizeOfHeaders, string contentType)
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{
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return inner.ReadMessage(stream, maxSizeOfHeaders, inner.ContentType);
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}
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public override void WriteMessage(Message message, Stream stream)
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{
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inner.WriteMessage(message, stream);
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}
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public override ArraySegment<byte> WriteMessage(
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Message message,
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int maxMessageSize,
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BufferManager bufferManager,
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int messageOffset)
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{
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return inner.WriteMessage(message, maxMessageSize, bufferManager, messageOffset);
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}
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}
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