How to upload files directly to S3 using PHP and with progress bar
There are some similar questions but开发者_如何学编程 none have a good answers in how to upload files directly to S3 using PHP with progress bar. Is it even possible adding a progress bar without using Flash?
NOTE: I am referring to uploading from client browser directly to S3.
I've done this in our project. You can't upload directly to S3 using AJAX because of standard cross domain security policies; instead, you need to use either a regular form POST or Flash. You'll need to send the security policy and signature in a relatively complex process, as explained in the S3 docs.
YES, it is possible to do this in PHP SDK v3.
$client = new S3Client(/* config */);
$result = $client->putObject([
'Bucket' => 'bucket-name',
'Key' => 'bucket-name/file.ext',
'SourceFile' => 'local-file.ext',
'ContentType' => 'application/pdf',
'@http' => [
'progress' => function ($downloadTotalSize, $downloadSizeSoFar, $uploadTotalSize, $uploadSizeSoFar) {
// handle your progress bar percentage
printf(
"%s of %s downloaded, %s of %s uploaded.\n",
$downloadSizeSoFar,
$downloadTotalSize,
$uploadSizeSoFar,
$uploadTotalSize
);
}
]
]);
This is explained in the AWS docs - S3 Config section. It works by exposing GuzzleHttp's progress
property-callable, as explained in this SO answer.
Technically speaking, with PHP you cannot go from client --> S3. Your solution, if you want to use PHP would either have to be designed as follows:
- Client -> Web Server (PHP) -> Amazon S3
- Client with PHP server embedded -> Amazon S3
The AWS PHP SDK: http://aws.amazon.com/sdkforphp/ is very well written and contains a specific example on how to send a file from a Client --> Server --> S3
With respects to the progress bar, there are many options available. A quick search of stackoverflow.com shows a question answered identical to this one:
- Upload File Directly to S3 with Progress Bar
- 'pass through' php upload to amazon's s3?
It is possible to directly upload, but progress bar is impossible: http://undesigned.org.za/2007/10/22/amazon-s3-php-class/
see example_form in the downloads, direct upload from browser to S3
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