Xabi Xabi - 1 year ago 128
PHP Question

Upload base64 image to amazon s3

I'm having some issues when trying to upload an image to AWS S3. It seems to upload the file correctly but, whenever I try to download or preview, it can't be opened. Currently, this is the upload code I'm using:

require_once 'classes/amazon.php';
require_once 'includes/aws/aws-autoloader.php';
use Aws\S3\S3Client;

$putdata = file_get_contents("php://input");
$request = json_decode($putdata);

$image_parts = explode(";base64,", $request->image);
$image_type_aux = explode("image/", $image_parts[0]);
$image_type = $image_type_aux[1];
$image_base64 = $image_parts[1];

$dateTime = new DateTime();
$fileName = $dateTime->getTimestamp() . "." . $image_type;

$s3Client = S3Client::factory(array(
'region' => 'eu-west-1',
'version' => '2006-03-01',
'credentials' => array(
'key' => Amazon::getAccessKey(),
'secret' => Amazon::getSecretKey(),

try {
$result = $s3Client->putObject(array(
'Bucket' => Amazon::getBucket(),
'Key' => 'banners/' . $fileName,
'Body' => $image_base64,
'ContentType' => 'image/' . $image_type,
'ACL' => 'public-read'
echo $result['ObjectURL'] . "\n";
} catch(S3Exception $e) {
echo $e->getMessage() . "\n";

So, when I check the console after uploading the image file, it has the expected size, permissions and headers but, as I said, whenever I try to open the file, it fails.

What could be the problem here? Thanks in advance.

Answer Source

The issue here is you appear to be uploading the base64 encoded version of the image and not the raw bytes of the image. Take $image_base64 and decode into raw bytes first http://php.net/manual/en/function.base64-decode.php . I am sure if you tried to open those "images" in a text editor you would see base64 hex data.

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