mathrestapi.yaml

swagger: "2.0"
info:
  description: "My Math API"
  title: "REST Enpoint for my Math API"
  version: "1.0.0"
host: tryaf.azurewebsites.net
schemes:
  - https
basePath: /
produces:
  - application/json
consumes:
  - application/json
paths:
  /api/MathRestAPI:
    get:
      operationId: get_Result
      summary: Do Math
      parameters:
        - in: query
          name: operand1
          type: number
          description: 'A number'
          default: 10
        - in: query
          name: operand2
          type: number
          description: 'A number'
          default: 5
        - in: query
          name: targetOperation
          type: string
          description: 'targetOperation'
          default: "plus"
      responses:
        '200':
          description: OK
          schema:
            $ref: '#/definitions/mathapi'
definitions:
  mathapi:
    properties:
      Result:
        type: string
    type: object

run.ps1

$requestBody = Get-Content $req -Raw | ConvertFrom-Json

$operand1 = $requestBody.operand1
$operand2 = $requestBody.operand2
$targetOperation = $requestBody.targetOperation

if($req_query_operand1) {$operand1=$req_query_operand1}
if($req_query_operand2) {$operand2=$req_query_operand2}
if($req_query_targetOperation) {$targetOperation=$req_query_targetOperation}

switch ($targetOperation) {
    "plus" {$result = [int]$operand1 + $operand2}
    "minus" {$result = [int]$operand1 - $operand2}
    default {$result="Hello from the Math Rest API"}
}

$operand1
$operand2
$targetOperation

@{Result=$result} | ConvertTo-json > $res

irm "https://tryaf.azurewebsites.net/api/MathRestAPI?operand1=10&operand2=21&targetoperation=plus"