API upload did not contain a file part

Hello there

I am trying to setup a process allowing me to upload PDFs into Box directly from my PHP app.

When I try to call your API endpoint, I get a 400 error with the message "API upload did not contain a file part".

I double-checked that my file was in the request I sent and I also found some third-party PHP SDK doing things in the same way I did. Yet I still get this error.

My code (using Guzzle) :

$response = $client->post('https://upload.box.com/api/2.0/files/content', [
    'headers' => [
        'Authorization' => sprintf('Bearer %s', $token['access_token']),
    ],
    'multipart' => [
        [
            'name' => 'attributes',
            'contents' => json_encode([
                'name' => sprintf('%s-%s.pdf', $fileName, time()),
                'parent' => ['id' => 0],
            ]),
        ],
        [
            'name' => 'file',
            'contents' => $file->getContent(),
        ],
    ],
]);

I tried reaching your Endpoint directly with cURL, but I get the same result.
Note that $file->getContent() returns the binary PDF directly (that I already have in memory, because I did some processing on them before). In that scenario, I can't use a CurlFile object (like I saw in another post in your support section).

I also tried to generate a Platform App Diagnostics but the CSV is empty.

Any idea on how I can solve my issue ?

Best regards,

Adrien

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