[Service Bus] How to properly deserialize application properties of a message?

• Package Name:
• @azure/service-bus
• Package Version:
• 7.0.3
• Operating system:
• MacOS
• nodejs
  • version: 14.15.1
• browser
  • name/version:
• typescript
  • version:
• Is the bug related to documentation in
  • README.md
  • source code documentation
  • SDK API docs on https://docs.microsoft.com

Describe the bug When sending a message to a queue, we are setting one of the application properties of type Date. However when we receive the message, we get that application property as number. How can we properly deserialize that property to Date type.

To Reproduce Please see this sample code:

const { ServiceBusClient } = require("@azure/service-bus");

const connectionString = 'connection-string';

const client = new ServiceBusClient(connectionString);

const sender = client.createSender('test');
const msg = {
  body: 'This is a test',
  applicationProperties: {
    'bool': true,
    'number': 123,
    'string': 'some string',
    'date': new Date(),
    'number2': 1614257296160
  }
};
console.log('msg');
console.log(msg);
console.log('===========================');
sender.sendMessages([msg]);
console.log('message sent...')
console.log('===========================');

const receiver = client.createReceiver('test');

receiver.receiveMessages(1)
.then((result) => {
  console.log(result[0].applicationProperties);
})
.catch((error) => {
  console.log(error);
});

Expected behavior Printing msg to console prints the following:

{
  body: 'This is a test',
  applicationProperties: {
    bool: true,
    number: 123,
    string: 'some string',
    date: 2021-02-25T13:17:48.085Z,
    number2: 1614257296160
  }
}

However when we receive the message and print the applicationProperties to console, we get the following:

applicationProperties: {
      bool: true,
      number: 123,
      string: 'some string',
      date: 1614259068085,
      number2: 1614257296160
    }

Additional context When I view the message in Service Bus Explorer, it gets deserialized properly.

[richardpark-msft]

Hi @gmantri, this conversion happens a bit lower in the stack (in the rhea package). I’ve opened up a thread there to see what can be done.

[richardpark-msft]

Transferring this to @chradek as he is the new Service Bus package maintainer.

I will note the change has made it’s way into rhea and has been absorbed into Service Bus. We need to understand how to properly expose it, however, as exposing it directly would be a breaking change.