Configuration

This step assumes you have an imaging archive. If you need assistance setting one up, check out the Data Source Guide or a deployment recipe that contains an open Image Archive

Configuration Files

The configuration for our viewer is in the <root>platform/viewer/public/config directory. Our build process knows which configuration file to use based on the APP_CONFIG environment variable. By default, its value is config/default.js. The majority of the viewer's features, and registered extension's features, are configured using this file.

Embedded Use Note:

Alternatively, when using the umd bundle for embedded use cases, these same values are what you'll pass to installViewer method:

OHIFStandaloneViewer.installViewer(window.config)

Environment Variables

We use environment variables at build and dev time to change the Viewer's behavior. We can update the HTML_TEMPLATE to easily change which extensions are registered, and specify a different APP_CONFIG to connect to an alternative data source (or even specify different default hotkeys).

Environment Variable	Description	Default
HTML_TEMPLATE	Which HTML template to use as our web app's entry point. Specific to PWA builds.	index.html
PUBLIC_URL	The route relative to the host that the app will be served from. Specific to PWA builds.	/
APP_CONFIG	Which [configuration file][config-file] to copy to output as app-config.js	config/default.js
PROXY_TARGET	When developing, proxy requests that match this pattern to PROXY_DOMAIN	undefined
PROXY_DOMAIN	When developing, proxy requests from PROXY_TARGET to PROXY_DOMAIN	undefined

How do I configure my project?

The simplest way is to update the existing default config:

/platform/viewer/public/config/default.js

window.config = {
  routerBasename: '/',
  servers: {
    dicomWeb: [
      {
        name: 'DCM4CHEE',
        wadoUriRoot: 'https://server.dcmjs.org/dcm4chee-arc/aets/DCM4CHEE/wado',
        qidoRoot: 'https://server.dcmjs.org/dcm4chee-arc/aets/DCM4CHEE/rs',
        wadoRoot: 'https://server.dcmjs.org/dcm4chee-arc/aets/DCM4CHEE/rs',
        qidoSupportsIncludeField: true,
        imageRendering: 'wadors',
        thumbnailRendering: 'wadors',
      },
    ],
  },
};

The configuration can also be written as a JS Function in case you need to inject dependencies like external services:

window.config = ({ servicesManager } = {}) => {
  const { UIDialogService } = servicesManager.services;
  return {
    cornerstoneExtensionConfig: {
      tools: {
        ArrowAnnotate: {
          configuration: {
            getTextCallback: (callback, eventDetails) => UIDialogService.create({...
          }
        }
      },
    },
    routerBasename: '/',
    servers: {
      dicomWeb: [
        {
          name: 'DCM4CHEE',
          wadoUriRoot: 'https://server.dcmjs.org/dcm4chee-arc/aets/DCM4CHEE/wado',
          qidoRoot: 'https://server.dcmjs.org/dcm4chee-arc/aets/DCM4CHEE/rs',
          wadoRoot: 'https://server.dcmjs.org/dcm4chee-arc/aets/DCM4CHEE/rs',
          qidoSupportsIncludeField: true,
          imageRendering: 'wadors',
          thumbnailRendering: 'wadors',
        },
      ],
    },
  };
};

You can also create a new config file and specify its path relative to the build output's root by setting the APP_CONFIG environment variable. You can set the value of this environment variable a few different ways:

• ~Add a temporary environment variable in your shell~
  • Previous react-scripts functionality that we need to duplicate with dotenv-webpack
• ~Add environment specific variables in .env file(s)~
  • Previous react-scripts functionality that we need to duplicate with dotenv-webpack
• Using the cross-env package in an npm script:
  • "build": "cross-env APP_CONFIG=config/my-config.js react-scripts build"

After updating the configuration, yarn run build to generate updated build output.