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Avoid external contentType processing for OPC UA #1402

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Avoid external contentType processing for OPC UA #1402

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8ac8dce
refactor: avoid external contentType processing for OPC UA
danielpeintner Jun 25, 2025
fde2f4c
refactor: move removing contentType just before returning
danielpeintner Jun 25, 2025
b365da4
refactor: remove contentType only if not handled by internal OPC UA C…
danielpeintner Jun 25, 2025
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2 changes: 1 addition & 1 deletion packages/binding-opcua/src/codec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -258,7 +258,7 @@ export const theOpcuaJSONCodec = new OpcuaJSONCodec();

export class OpcuaBinaryCodec implements ContentCodec {
getMediaType(): string {
return "application/opcua+octet-stream"; // see Ege
return "application/opcua+octet-stream";
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This is just a left-over I would like to remove

}

bytesToValue(bytes: Buffer, schema: DataSchema, parameters?: { [key: string]: string }): DataValueJSON {
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6 changes: 6 additions & 0 deletions packages/binding-opcua/src/opcua-protocol-client.ts
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Expand Up @@ -302,6 +302,11 @@ export class OPCUAProtocolClient implements ProtocolClient {
return this._resolveNodeId2(form, fNodeId as NodeIdLike | NodeByBrowsePath);
}

// node-opcua handles the contentType internally and no further *external* processing should be done
private vanishContentType(form: OPCUAForm) {
form.contentType = undefined;
}

public async readResource(form: OPCUAForm): Promise<Content> {
debug(`readResource: reading ${form}`);

Expand All @@ -314,6 +319,7 @@ export class OPCUAProtocolClient implements ProtocolClient {
return this._dataValueToContent(form, dataValue);
});
debug(`readResource: contentType ${content.type}`);
this.vanishContentType(form);
return content;
}

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