How to re-write this cURL request in Guzzle 6? - php

Question

Example Code (provided by Channel Advisor):
https://developer.channeladvisor.com/authorization/updating-access-token/php-updating-access-token
<?php
$endpoint = "https://api.channeladvisor.com/oauth2/token";
$refresh_token="{{REFRESH_TOKEN}}";
$application_id= "{{APPLICATION_ID}}";
$shared_secret="{{SHARED_SECRET}}";
$url = $endpoint;
$client_id = base64_encode("$application_id:$shared_secret");
$body = "grant_type=refresh_token&refresh_token=$refresh_token";
$length = strlen($body);
$headers = array(
"Authorization: Basic $client_id",
"Content-Type: text/plain",
"Cache-Control: no-cache",
"Content-Length: $length"
);
echo "URL:".$url."\n";
echo "Body:$body\n";
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_POSTFIELDS, $body);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
$result = curl_exec($curl);
$httpcode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
curl_close($curl);
print_r($httpcode);
echo"\n";
$json = json_decode($result, true);
var_dump($json);
?>
Attempting to rewrite as Guzzle HTTP request:
My question is am I setting the Basic authentication correctly?
$accessToken = {{ACCESS_TOKEN}};
$refresh_token = {{ACCESS_TOKEN}};
$application_id = {{APPLICATION_ID}};
$shared_secret = {{SHARED_SECRET}};
$base_uri = "https://api.channeladvisor.com/oauth2/token";
$client_id = 'Basic ' . base64_encode("$application_id:$shared_secret");
$client = new Client(
['headers' => [
'Content-Type' => 'application/x-www-form-urlencoded',
'Authorization' => $client_id
]
]
);
$result = $client->request('POST', $base_uri, [
'query' => [
'grant_type' => 'refresh_token',
'refresh_token' => $refresh_token
],
]);
$body = $response->getBody();
// Implicitly cast the body to a string and echo it
echo $body;

Answer 1

You're sending POST request, then I guess you should send FORM data, not QUERY data.
$response = $client->request('POST', $base_uri, [
'form_params' => [
'grant_type' => 'refresh_token',
'refresh_token' => $refresh_token
],
]);