<?php

namespace Torann\GeoIP\Support;

use Illuminate\Support\Arr;

class HttpClient
{
    /**
     * Request configurations.
     *
     * @var array
     **/
    private $config = [
        'base_uri' => '',
        'headers' => [],
        'query' => [],
    ];

    /**
     * Last request http status.
     *
     * @var int
     **/
    protected $http_code = 200;

    /**
     * Last request error string.
     *
     * @var string
     **/
    protected $errors = null;

    /**
     * Array containing headers from last performed request.
     *
     * @var array
     */
    private $headers = [];

    /**
     * HttpClient constructor.
     *
     * @param array $config
     */
    public function __construct(array $config = [])
    {
        $this->config = $config;
    }

    /**
     * Perform a get request.
     *
     * @param  string $url
     * @param  array  $query
     * @param  array  $headers
     *
     * @return array
     */
    public function get($url, array $query = [], array $headers = [])
    {
        return $this->execute('GET', $this->buildGetUrl($url, $query), [], $headers);
    }

    /**
     * Execute the curl request
     *
     * @param  string $method
     * @param  string $url
     * @param  array  $query
     * @param  array  $headers
     *
     * @return array
     */
    public function execute($method, $url, array $query = [], array $headers = [])
    {
        // Merge global and request headers
        $headers = array_merge(
            Arr::get($this->config, 'headers', []),
            $headers
        );

        // Merge global and request queries
        $query = array_merge(
            Arr::get($this->config, 'query', []),
            $query
        );

        $this->errors = null;

        $curl = curl_init();

        // Set options
        curl_setopt_array($curl, [
            CURLOPT_URL => $this->getUrl($url),
            CURLOPT_HTTPHEADER => $headers,
            CURLOPT_CONNECTTIMEOUT => 20,
            CURLOPT_TIMEOUT => 90,
            CURLOPT_RETURNTRANSFER => 1,
            CURLOPT_SSL_VERIFYPEER => 0,
            CURLOPT_SSL_VERIFYHOST => 0,
            CURLOPT_HEADER => 1,
            CURLINFO_HEADER_OUT => 1,
            CURLOPT_VERBOSE => 1,
        ]);

        // Setup method specific options
        switch ($method) {
            case 'PUT':
            case 'PATCH':
            case 'POST':
                curl_setopt_array($curl, [
                    CURLOPT_CUSTOMREQUEST => $method,
                    CURLOPT_POST => true,
                    CURLOPT_POSTFIELDS => $query,
                ]);
                break;

            case 'DELETE':
                curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'DELETE');
                break;

            default:
                curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'GET');
                break;
        }

        // Make request
        curl_setopt($curl, CURLOPT_HEADER, true);
        $response = curl_exec($curl);

        // Set HTTP response code
        $this->http_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);

        // Set errors if there are any
        if (curl_errno($curl)) {
            $this->errors = curl_error($curl);
        }

        // Parse body
        $header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
        $header = substr($response, 0, $header_size);
        $body = substr($response, $header_size);

        curl_close($curl);

        return [$body, $this->parseHeaders($header)];
    }

    /**
     * Check if the curl request ended up with errors
     *
     * @return bool
     */
    public function hasErrors()
    {
        return is_null($this->errors) === false;
    }

    /**
     * Get curl errors
     *
     * @return string
     */
    public function getErrors()
    {
        return $this->errors;
    }

    /**
     * Get last curl HTTP code.
     *
     * @return int
     */
    public function getHttpCode()
    {
        return $this->http_code;
    }

    /**
     * Parse string headers into array
     *
     * @param string $headers
     *
     * @return array
     */
    private function parseHeaders($headers)
    {
        $result = [];

        foreach (preg_split("/\\r\\n|\\r|\\n/", $headers) as $row) {
            $header = explode(':', $row, 2);

            if (count($header) == 2) {
                $result[$header[0]] = trim($header[1]);
            }
            else {
                $result[] = $header[0];
            }
        }

        return $result;
    }

    /**
     * Get request URL.
     *
     * @param  string $url
     *
     * @return string
     */
    private function getUrl($url)
    {
        // Check for URL scheme
        if (parse_url($url, PHP_URL_SCHEME) === null) {
            $url = Arr::get($this->config, 'base_uri') . $url;
        }

        return $url;
    }

    /**
     * Build a GET request string.
     *
     * @param  string $url
     * @param  array  $query
     *
     * @return string
     */
    private function buildGetUrl($url, array $query = [])
    {
        // Merge global and request queries
        $query = array_merge(
            Arr::get($this->config, 'query', []),
            $query
        );

        // Append query
        if ($query = http_build_query($query)) {
            $url .= strpos($url, '?') ? $query : "?{$query}";
        }

        return $url;
    }
}

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                        Request Example (guzzle)
                        

                        
                            
<?php
                            
 require_once('vendor/autoload.php');
                            
 $client = new \GuzzleHttp\Client();
                            
 $response = $client->request('POST', $base_url. 'v1/generate-token', [
                            
'headers' => [
                            
  'accept' => 'application/json',
                            
  'content-type' => 'application/json',
                            
 ],
                            
'form_params' => [
                            
  'client_id'     => '$client_id',
                            
  'secret_id'     => 'secret_id',
                            
  'env'           => 'env',
                            
  'merchant_id'   => 'merchant_id',
                            
 ],
                            
                            
]);
                            
echo $response->getBody();
                        
                    
                

                    
                        
**Response: SUCCESS (200 OK)**
                        
{
                        
 "message": {
                        
 "success": [
                        
  "Successfully token is generated"
                        
 ]
                        
},
                        
"data": {
                        
 "token":"eyJpdiI6InpkczhjTjhQdVhUL2lKQ0pSUUx6aUE9P
SIsInZhbHVlIjoiVGVBTVBDTXltbjNZcEIvdEJveGpTSno3TU5NRUtn
VkhCZ1pHTFNCUnZGQ2UxMnYxN202cEE1YVRDTEFsc0ZERExoTjdtL0dTL2x
oU3QzeUJJOExiMUx5T0w1L0llUXhTUkU1cWVLWEdEbEplb0dKNXcwbTNRM0
VxdkUwYzZuNFdtNkhMQ0pRZysyNWkvdzBxSlBoSVBSOGFTekNnR2RXNHVtc
G9lMGZOTmNCcm1hR3c5Sk9KTnB4Y3ltZDl6cm90MThrR21Ca3B1azc3bXRi
Q0J6SW96UVo1elNkU1ZqeE05bTcwWGp1MEUxWlJFdnNWTmpSbnVpeW92b2U
4dXZkUGgyb1VmK0luaGdyaFlsVTZlcVpVRnZlTG1DeFF6Ykk2T2h6Z3Jzbn
IyNHpNdHowSE5JdDR0Y0pZT20zUm1XYW8iLCJtYWMiOiJlY2M4NGE1OGUzYz
kzYzk0YzljNmVmNjE0YWI0ZDIwOGI3NDQ2YWEyY2ZhNzc0NzE4ZmY1ZmYyMz

                        IyZmQzNDY1IiwidGFnIjoiIn0=",
                        
},
                        
"type": "success"
                        
}
                    
                

                    
                        
**Response: ERROR (400 FAILED)**
                        
{
                        
 "message": {
                        
 "error": [
                        
  "Invalid credentials."
                        
 ]
                        
},
                        
"data": null,
                        
"type": "error"
                        
}