Calculator Service

Instructions

HTTP endpoints are better with type checking. Adding a Record type to a POST request will ensure the correct data is sent every time.

Objectives

• Modify the provided code.
• Add the necessary attributes to this record to accept two operands and an operator.
• Add an HTTP resource function to accept a POST request on path '/calc'
• The function should accept the Calculation record type as the payload and return a generic JSON object

Accepts

{ "operand1": 4, "operand2": 10.2, "operator": "+" }

Returns

{ "expression": "4+10.2", "result": 14.2 }

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Source

This is an exercise to introduce the Ballerina Record type in Network interactions