This solution provides an ASP.NET Core Web API for processing DWG files using Autodesk RealDWG in a decoupled job queue model.

Build.sln
├── DWGExtractor/         # DWG parsing logic (runs RealDWG)
├── DWGLib/               # Shared library (optional usage)
├── WebApi/               # ASP.NET Core Web API
│   ├── Controllers/      # API controllers
│   ├── Services/         # IJobQueue, DrawingProcessor
│   ├── Models/           # DrawingJob, Response Models
├── WebApi.Tests/         # xUnit Test Project

• Get the Autodesk RealDWG SDK from [Techsoft3d](Autodesk RealDWG | Tech Soft 3D) vendor, they are the only RealDWG resellers of Autodesk.

• Set REALDWGSDK= <Path of RealDWG SDK>

  • example SET REALDWGSDK=D:\RD25\RealDWG 2025\

• Download .NET 8.0

• Download Visual Studio 2019 or 2022 any version, community edition also works.

dotnet test WebApi.Tests/WebApi.Tests.csproj

dotnet run --project WebApi/WebApi.csproj

• POST /upload – Uploads a DWG file for processing.
• GET /status/{id} – Get status of a processing job.
• GET /result/{id} – Get parsed layer/block results from DWG file.

1. Uploaded file creates a DrawingJob in an InMemoryJobQueue.
2. Background processor triggers DWGExtractor as a subprocess.
3. Output is parsed into text and returned via /result.

The API is load tested using K6, a modern load testing tool. Here's an example test script:

There are other scripts for various scenaros at .\LoadTesting folder.

import http from 'k6/http';
import { check, sleep } from 'k6';

export default function () {
  const file = open('./sample.dwg', 'b');
  const data = {
    file: http.file(file, 'sample.dwg')
  };

  const res = http.post('http://localhost:5000/api/drawings/upload', data);
  check(res, {
    'upload successful': (r) => r.status === 200,
  });

  sleep(1);
}

k6 run loadTest.js

This script uploads a DWG file and checks the response for correctness. You can expand it to chain calls to /status and /result.

This sample is licensed under the terms of the MIT License. Please see the [LICENSE](ReadDWG/LICENSE at master · MadhukarMoogala/ReadDWG · GitHub) file for full details.

Madhukar Moogala, Autodesk Platform Services @galakar