How to send an XML-file with PHP cURL?

Question

This question is market as answered in this thread:

How to POST an XML file using cURL on php?

But that answer wasn't really the correct answer in my opinion since it just show how to send XML code with cURL. I need to send an XML file.

Basically, I need this C# code to be converted to PHP:

public Guid? UploadXmlFile()
{
    var fileUploadClient = new WebClient();
    fileUploadClient.Headers.Add("Content-Type", "application/xml");
    fileUploadClient.Headers.Add("Authorization", "api " + ApiKey);

    var rawResponse = fileUploadClient.UploadFile(Url, FilePath);
    var stringResponse = Encoding.ASCII.GetString(rawResponse);

    var jsonResponse = JObject.Parse(stringResponse);
    if (jsonResponse != null)
    {
        var importFileId = jsonResponse.GetValue("ImportId");
        if (importFileId != null)
        {
            return new Guid(importFileId.ToString());
        }
    }
    return null;
}

I have tried in several ways and this is my latest try.

The cURL call:

/**
 * CDON API Call
 *
 */
function cdon_api($way, $method, $postfields=false, $contenttype=false)
{
    global $api_key;

    $contenttype = (!$contenttype) ? 'application/x-www-form-urlencoded' : $contenttype;

    $curlOpts = array(
        CURLOPT_URL => 'https://admin.marketplace.cdon.com/api/'.$method,
        CURLOPT_RETURNTRANSFER => TRUE,
        CURLOPT_TIMEOUT => 60,
        CURLOPT_HTTPHEADER => array('Authorization: api '.$api_key, 'Content-type: '.$contenttype, 'Accept: application/xml')
    );

        if ($way == 'post')
        {
            $curlOpts[CURLOPT_POST] = TRUE;
        }
        elseif ($way == 'put')
        {
            $curlOpts[CURLOPT_PUT] = TRUE;
        }

        if ($postfields !== false)
        {
            $curlOpts[CURLOPT_POSTFIELDS] = $postfields;
        }

    # make the call
    $ch = curl_init();
    curl_setopt_array($ch, $curlOpts);
    $response = curl_exec($ch);
    curl_close($ch);

    return $response;
}

The File Export:

/**
 * Export products
 *
 */
function cdon_export()
{
    global $api_key;

    $upload_dir = wp_upload_dir();
    $filepath = $upload_dir['basedir'] . '/cdon-feed.xml';

    $response = cdon_api('post', 'importfile', array('uploaded_file' => '@/'.realpath($filepath).';type=text/xml'), 'multipart/form-data');

    echo '<br>Response 1: <pre>'.print_r(json_decode($response), true).'</pre><br>';

    $data = json_decode($response, true);

        if (!empty($data['ImportId']))
        {
            $response = cdon_api('put', 'importfile?importFileId='.$data['ImportId'], false, 'text/xml');

            echo 'Response 2: <pre>'.print_r(json_decode($response), true).'</pre><br>';

            $data = json_decode($response, true);
        }
}

But the output I get is this:

---

Response 1:

stdClass Object ( [Message] => The request does not contain a valid media type. )

---

I have experimented around with different types at the different places, application/xml, multipart/form-data and text/xml, but nothing works.

How do I do to make it work? How do I manage to send the XML file with cURL?

Answer 1

to me, it looks like the C# code just does the equivalent of

function UploadXmlFile(): ?string {
    $ch = curl_init ( $url );
    curl_setopt_array ( $ch, array (
            CURLOPT_POST => 1,
            CURLOPT_HTTPHEADER => array (
                    "Content-Type: application/xml",
                    "Authorization: api " . $ApiKey 
            ),
            CURLOPT_POSTFIELDS => file_get_contents ( $filepath ),
            CURLOPT_RETURNTRANSFER => true 
    ) );
    $jsonResponse = json_decode ( ($response = curl_exec ( $ch )) );
    curl_close ( $ch );
    return $jsonResponse->importId ?? NULL;
}

but at least 1 difference, your PHP code adds the header 'Accept: application/xml', your C# code does not