Why am I getting ' BAD_REQUEST Unprocessable JSON'? - php

Question

I'm trying to make a call to a REST-API but it only returns 'BAD_REQUEST Unprocessable JSON'.
I've tried rewriting the input as the example I'm following, but it just gives me the same error.
This is the code I'm using for sending the request:
function callAPI($method, $url, $data)
{
$curl = curl_init();
$username = 'PK10008_e8f77aebdb0a';
$password = 'rwBmthNFK8JTbIL7';
switch($method)
{
case "POST":
curl_setopt($curl, CURLOPT_POST, 1);
if ($data)
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
break;
}
//Options
curl_setopt($curl, CURLOPT_USERPWD, $username . ":" . $password);
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_HTTPHEADER, array(
'Content-Type: application/json'
));
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
$result = curl_exec($curl);
if(!$result)
{
die("Connection Failure");
}
curl_close($curl);
return $result;
}
And this is the code I'm using to create and send the information:
$data_array = array(
'purchase_country'=> 'SE',
'purchase_currency'=> 'SEK',
'locale'=> 'sv-SE',
'order_amount'=> 10,
'order_tax_amount'=> 0,
'order_lines' => array(
'type'=> 'physical',
'reference'=> '19-402',
'name'=> 'Test',
'quantity'=> 1,
'unit_price'=> 10,
'tax_rate'=> 0,
'total_amount'=> 10,
'total_discount_amount'=> 0,
'total_tax_amount'=> 0
)
);
$make_call = callAPI('POST', 'https://api.playground.klarna.com/payments/v1/sessions', json_encode($data_array));
$response = json_decode($make_call, true);
And this is the example:
POST /payments/v1/sessions
Authorization: Basic pwhcueUff0MmwLShJiBE9JHA==
Content-Type: application/json
{
"purchase_country": "SE",
"purchase_currency": "SEK",
"locale": "sv-SE",
"order_amount": 10,
"order_tax_amount": 0,
"order_lines": [{
"type": "physical",
"reference": "19-402",
"name": "Battery Power Pack",
"quantity": 1,
"unit_price": 10,
"tax_rate": 0,
"total_amount": 10,
"total_discount_amount": 0,
"total_tax_amount": 0
}]
}
The result I'm getting is this:
'BAD_REQUEST
Unprocessable JSON
1734c472-c9cb-4022-b469-a8231c7abeec'
But I should be getting some thing like this:
HTTP/1.1 200 OK
Content-Type: application/json
{
"session_id": "068df369-13a7-4d47-a564-62f8408bb760",
"client_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjAwMDAwMDAwMDAtMDAwMDAtMDAwMC0wMDAwMDAwMC0wMDAwIiwidXJsIjoiaHR0cHM6Ly9jcmVkaXQtZXUua2xhcm5hLmNvbSJ9.A_rHWMSXQN2NRNGYTREBTkGwYwtm-sulkSDMvlJL87M",
"payment_method_categories": [{
"identifier": "pay_later"
"name" : "Pay later.",
"asset_urls" : {
"descriptive" : "https://cdn.klarna.com/1.0/shared/image/generic/badge/en_us/pay_later/descriptive/pink.svg",
"standard" : "https://cdn.klarna.com/1.0/shared/image/generic/badge/en_us/pay_later/standard/pink.svg"
}
}]
}

Answer 1

The issue I was having was how json_encode creates encodes arrays. Instead of this: "example":[{
"ex": "ex"
}]
It did this:
"example":{
"ex": "ex"
}
Which in turn made the json unreadable to the end API