CODEWITHSUNDEEP
typescriptdenooak
atish
atish

Reputation: 585

Can't do JSON.parse for raw format payload in Deno controller

I am creating a POST method api end point. I am sending the payload as a JSON string in RAW format from the postman. Then I am doing JSON.parse in my deno app controller. But the output after doing the JSON.parse is still a JSON string.

This is my controller code:

import { IResponse } from '../models/response.ts'
import { IFulllName } from '../models/full-name.ts'

export const printFullName = async (
  { request, response }: { request: any, response: any }) => {

    const body = await request.body();
    let value = body.value;
    console.log(value, '||| value');
    console.log(typeof(value), '||| value type');

    value = JSON.parse(JSON.stringify(value));

    // This should be a JSON object but it still logs as a string

    console.log(value, '||| value');
    console.log(typeof(value), '||| value type');
}

If I do JSON.parse directly without JSON.stringify, I get a 500 internal server error (no error in the logs as well).

Here is the payload that I have tried:

'{"firstName": "First", "lastName": "Last"}'

Note: I am using oak along with Deno.

What I need is to convert the JSON string into a JSON object in the controller code.

In case there is any inbuilt way of doing so using any oak method, please do suggest.

Upvotes: 2

Views: 1674

Answers (1)

Marcos Casagrande
Marcos Casagrande

Reputation: 40444

You're sending an invalid JSON object, in Postman you should POST:

{"firstName": "First", "lastName": "Last"}

without being wrapped by '.

const postedJSON = `'{"firstName": "First", "lastName": "Last"}'`;

// Invalid JSON for JSON.parse, remove '

const stringified = JSON.stringify(postedJSON);

console.log(stringified); // a valid JSON string

console.log(JSON.parse(stringified) === postedJSON);

In any case, the correct way to read a JSON payload in Oak is:

app.use(async ({ request, response }) => {
  const result = await request.body();
  console.log(result.value)
});

Be sure to send Content-Type: application/json

Upvotes: 2

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