Create a nested JSON Object with Javascript

Question

I´d like to create a JSON-Object for a Google API-Request. Only content is needed to change. My solution gives me an invalid JSON-Format and is more a hack. Is there an easier way to do this? Thank your for your hints.

The necessary format look like this:

{
  "requests": [
    {
      "image": {
        "content": "/9j/7QBEUGhvdG9zaG9...base64-encoded-image-content...fXNWzvDEeYxxxzj/Coa6Bax//Z"
      },
      "features": [
        {
          "type": "DOCUMENT_TEXT_DETECTION"
        }
      ]
    }
  ]
}

JS

var cvs = cvs.substring('data:image/png;base64,'.length);

var json1 = '{"requests":[{  "image":{    "content":"'
var json2 = '"},  "features": [{"type":"DOCUMENT_TEXT_DETECTION"}]    } ]}'

var entireJson = json1 + cvs + json2;
var ocrImage = JSON.stringify(entireJson);

your Jsons are not formatted correctly.

amrender singh
– amrender singh

2018-06-16 20:31:48 +00:00
Commented Jun 16, 2018 at 20:31 — amrender singh
– amrender singh, Commented Jun 16, 2018 at 20:31
If it is a string, why would you stringify it?!

Jonas Wilms
– Jonas Wilms

2018-06-16 20:34:15 +00:00
Commented Jun 16, 2018 at 20:34 — Jonas Wilms
– Jonas Wilms, Commented Jun 16, 2018 at 20:34
I think he meant to JSON.parse

Attersson
– Attersson

2018-06-16 20:34:33 +00:00
Commented Jun 16, 2018 at 20:34 — Attersson
– Attersson, Commented Jun 16, 2018 at 20:34

Attersson · Accepted Answer · 2018-06-16 20:33:52Z

1

What you have done in your example is initializing a Javascript Object.

JSON.parse(object_string); is not necessary. You may initialize it directly:

var ocrImage = {
  "requests": [
    {
      "image": {
        "content": "/9j/7QBEUGhvdG9zaG9...base64-encoded-image-content...fXNWzvDEeYxxxzj/Coa6Bax//Z"
      },
      "features": [
        {
          "type": "DOCUMENT_TEXT_DETECTION"
        }
      ]
    }
  ]
}

console.log(ocrImage)

answered Jun 16, 2018 at 20:33

Attersson

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