zebra_discovery_b64

This library decodes the discovery_b64 message that Zebra printers will send when they connect to a websocket endpoint, also named WebLink in the Zebra documentation.

Online demo

Features

• Decodes the raw base64 string into an easy to use strongly typed class.
• For backwards compatibility, the decoded value has a property discoveryDataMap that has the same entries as the Zebra SDK provides with the getDiscoveryDataMap() function.
• The decode process preserves the original source bytes per item.
• Each decoded item has an error value. This indicates if errors were encountered while decoding.
• A discovery object has an error property that can be used to test if there was an error while decoding.
• A discovery object can be serialized to json for easy further processing

Getting started

Add this package to your pubspec.yaml.

Usage

final discoveryB64 = "OiwuBAUBAAFaQlIAAEQzSjE5MzIwNjcyMgAAA....";

final discovery = Discovery.fromDiscoveryB64(discoveryB64);

The discovery variable can be an instance of one of these types.

• DiscoveryLegacy
• DiscoveryAdvancedV0
• DiscoveryAdvancedV1
• DiscoveryAdvancedV2
• DiscoveryAdvancedV3
• DiscoveryAdvancedV4

The DiscoveryAdvancedV4 is used for versions 4 and higher.

The actual type depends on version information provided in the discovery_b64 message.

Additional information

This code aims compatibility with

• Link-OS multiplatform SDK 2.15.1
• WebServices v. 2.14.5198

Samples of decoded messages can be found in the test_resources folder.