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<?php |
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namespace Dudlewebs\WPMCS\s3\Aws\S3; |
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|
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use Dudlewebs\WPMCS\s3\Aws; |
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use Dudlewebs\WPMCS\s3\Aws\CommandInterface; |
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use Dudlewebs\WPMCS\s3\Aws\Exception\AwsException; |
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use Dudlewebs\WPMCS\s3\GuzzleHttp\Promise; |
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use Dudlewebs\WPMCS\s3\GuzzleHttp\Promise\PromiseInterface; |
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use Dudlewebs\WPMCS\s3\GuzzleHttp\Promise\PromisorInterface; |
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use Iterator; |
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/** |
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* Transfers files from the local filesystem to S3 or from S3 to the local |
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* filesystem. |
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* |
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* This class does not support copying from the local filesystem to somewhere |
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* else on the local filesystem or from one S3 bucket to another. |
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*/ |
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class Transfer implements PromisorInterface |
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{ |
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private $client; |
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private $promise; |
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private $source; |
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private $sourceMetadata; |
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private $destination; |
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private $concurrency; |
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private $mupThreshold; |
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private $before; |
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private $s3Args = []; |
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private $addContentMD5; |
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/** |
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* When providing the $source argument, you may provide a string referencing |
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* the path to a directory on disk to upload, an s3 scheme URI that contains |
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* the bucket and key (e.g., "s3://bucket/key"), or an \Iterator object |
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* that yields strings containing filenames that are the path to a file on |
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* disk or an s3 scheme URI. The bucket portion of the s3 URI may be an S3 |
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* access point ARN. The "/key" portion of an s3 URI is optional. |
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* |
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* When providing an iterator for the $source argument, you must also |
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* provide a 'base_dir' key value pair in the $options argument. |
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* |
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* The $dest argument can be the path to a directory on disk or an s3 |
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* scheme URI (e.g., "s3://bucket/key"). |
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* |
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* The options array can contain the following key value pairs: |
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* |
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* - base_dir: (string) Base directory of the source, if $source is an |
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* iterator. If the $source option is not an array, then this option is |
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* ignored. |
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* - before: (callable) A callback to invoke before each transfer. The |
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* callback accepts a single argument: Aws\CommandInterface $command. |
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* The provided command will be either a GetObject, PutObject, |
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* InitiateMultipartUpload, or UploadPart command. |
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* - mup_threshold: (int) Size in bytes in which a multipart upload should |
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* be used instead of PutObject. Defaults to 20971520 (20 MB). |
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* - concurrency: (int, default=5) Number of files to upload concurrently. |
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* The ideal concurrency value will vary based on the number of files |
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* being uploaded and the average size of each file. Generally speaking, |
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* smaller files benefit from a higher concurrency while larger files |
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* will not. |
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* - debug: (bool) Set to true to print out debug information for |
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* transfers. Set to an fopen() resource to write to a specific stream |
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* rather than writing to STDOUT. |
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* |
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* @param S3ClientInterface $client Client used for transfers. |
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* @param string|Iterator $source Where the files are transferred from. |
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* @param string $dest Where the files are transferred to. |
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* @param array $options Hash of options. |
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*/ |
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public function __construct(S3ClientInterface $client, $source, $dest, array $options = []) |
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{ |
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$this->client = $client; |
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// Prepare the destination. |
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$this->destination = $this->prepareTarget($dest); |
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if ($this->destination['scheme'] === 's3') { |
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$this->s3Args = $this->getS3Args($this->destination['path']); |
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} |
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// Prepare the source. |
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if (\is_string($source)) { |
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$this->sourceMetadata = $this->prepareTarget($source); |
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$this->source = $source; |
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} elseif ($source instanceof Iterator) { |
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if (empty($options['base_dir'])) { |
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throw new \InvalidArgumentException('You must provide the source' . ' argument as a string or provide the "base_dir" option.'); |
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} |
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$this->sourceMetadata = $this->prepareTarget($options['base_dir']); |
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$this->source = $source; |
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} else { |
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throw new \InvalidArgumentException('source must be the path to a ' . 'directory or an iterator that yields file names.'); |
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} |
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// Validate schemes. |
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if ($this->sourceMetadata['scheme'] === $this->destination['scheme']) { |
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throw new \InvalidArgumentException("You cannot copy from" . " {$this->sourceMetadata['scheme']} to" . " {$this->destination['scheme']}."); |
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} |
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// Handle multipart-related options. |
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$this->concurrency = isset($options['concurrency']) ? $options['concurrency'] : MultipartUploader::DEFAULT_CONCURRENCY; |
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$this->mupThreshold = isset($options['mup_threshold']) ? $options['mup_threshold'] : 16777216; |
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if ($this->mupThreshold < MultipartUploader::PART_MIN_SIZE) { |
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throw new \InvalidArgumentException('mup_threshold must be >= 5MB'); |
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} |
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// Handle "before" callback option. |
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if (isset($options['before'])) { |
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$this->before = $options['before']; |
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if (!\is_callable($this->before)) { |
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throw new \InvalidArgumentException('before must be a callable.'); |
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} |
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} |
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// Handle "debug" option. |
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if (isset($options['debug'])) { |
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if ($options['debug'] === \true) { |
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$options['debug'] = \fopen('php://output', 'w'); |
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} |
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if (\is_resource($options['debug'])) { |
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$this->addDebugToBefore($options['debug']); |
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} |
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} |
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// Handle "add_content_md5" option. |
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$this->addContentMD5 = isset($options['add_content_md5']) && $options['add_content_md5'] === \true; |
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} |
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/** |
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* Transfers the files. |
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* |
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* @return PromiseInterface |
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*/ |
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public function promise() : PromiseInterface |
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{ |
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// If the promise has been created, just return it. |
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if (!$this->promise) { |
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// Create an upload/download promise for the transfer. |
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$this->promise = $this->sourceMetadata['scheme'] === 'file' ? $this->createUploadPromise() : $this->createDownloadPromise(); |
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} |
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return $this->promise; |
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} |
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/** |
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* Transfers the files synchronously. |
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*/ |
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public function transfer() |
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{ |
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$this->promise()->wait(); |
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} |
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private function prepareTarget($targetPath) |
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{ |
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$target = ['path' => $this->normalizePath($targetPath), 'scheme' => $this->determineScheme($targetPath)]; |
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if ($target['scheme'] !== 's3' && $target['scheme'] !== 'file') { |
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throw new \InvalidArgumentException('Scheme must be "s3" or "file".'); |
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} |
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return $target; |
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} |
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/** |
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* Creates an array that contains Bucket and Key by parsing the filename. |
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* |
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* @param string $path Path to parse. |
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* |
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* @return array |
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*/ |
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private function getS3Args($path) |
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{ |
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$parts = \explode('/', \str_replace('s3://', '', $path), 2); |
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$args = ['Bucket' => $parts[0]]; |
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if (isset($parts[1])) { |
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$args['Key'] = $parts[1]; |
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} |
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return $args; |
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} |
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/** |
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* Parses the scheme from a filename. |
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* |
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* @param string $path Path to parse. |
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* |
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* @return string |
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*/ |
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private function determineScheme($path) |
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{ |
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return !\strpos($path, '://') ? 'file' : \explode('://', $path)[0]; |
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} |
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/** |
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* Normalize a path so that it has UNIX-style directory separators and no trailing / |
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* |
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* @param string $path |
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* |
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* @return string |
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*/ |
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private function normalizePath($path) |
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{ |
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return \rtrim(\str_replace('\\', '/', $path), '/'); |
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} |
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private function resolvesOutsideTargetDirectory($sink, $objectKey) |
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{ |
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$resolved = []; |
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$sections = \explode('/', $sink); |
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$targetSectionsLength = \count(\explode('/', $objectKey)); |
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$targetSections = \array_slice($sections, -($targetSectionsLength + 1)); |
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$targetDirectory = $targetSections[0]; |
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foreach ($targetSections as $section) { |
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if ($section === '.' || $section === '') { |
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continue; |
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} |
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if ($section === '..') { |
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\array_pop($resolved); |
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if (empty($resolved) || $resolved[0] !== $targetDirectory) { |
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return \true; |
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} |
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} else { |
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$resolved[] = $section; |
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} |
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} |
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return \false; |
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} |
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private function createDownloadPromise() |
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{ |
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$parts = $this->getS3Args($this->sourceMetadata['path']); |
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$prefix = "s3://{$parts['Bucket']}/" . (isset($parts['Key']) ? $parts['Key'] . '/' : ''); |
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$commands = []; |
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foreach ($this->getDownloadsIterator() as $object) { |
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// Prepare the sink. |
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$objectKey = \preg_replace('/^' . \preg_quote($prefix, '/') . '/', '', $object); |
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$sink = $this->destination['path'] . '/' . $objectKey; |
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$command = $this->client->getCommand('GetObject', $this->getS3Args($object) + ['@http' => ['sink' => $sink]]); |
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if ($this->resolvesOutsideTargetDirectory($sink, $objectKey)) { |
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throw new AwsException('Cannot download key ' . $objectKey . ', its relative path resolves outside the' . ' parent directory', $command); |
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} |
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// Create the directory if needed. |
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$dir = \dirname($sink); |
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if (!\is_dir($dir) && !\mkdir($dir, 0777, \true)) { |
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throw new \RuntimeException("Could not create dir: {$dir}"); |
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} |
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// Create the command. |
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$commands[] = $command; |
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} |
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// Create a GetObject command pool and return the promise. |
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return (new Aws\CommandPool($this->client, $commands, ['concurrency' => $this->concurrency, 'before' => $this->before, 'rejected' => function ($reason, $idx, Promise\PromiseInterface $p) { |
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$p->reject($reason); |
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}]))->promise(); |
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} |
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private function createUploadPromise() |
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{ |
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// Map each file into a promise that performs the actual transfer. |
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$files = \Dudlewebs\WPMCS\s3\Aws\map($this->getUploadsIterator(), function ($file) { |
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return \filesize($file) >= $this->mupThreshold ? $this->uploadMultipart($file) : $this->upload($file); |
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}); |
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// Create an EachPromise, that will concurrently handle the upload |
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// operations' yielded promises from the iterator. |
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return Promise\Each::ofLimitAll($files, $this->concurrency); |
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} |
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/** @return Iterator */ |
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private function getUploadsIterator() |
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{ |
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if (\is_string($this->source)) { |
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return Aws\filter(Aws\recursive_dir_iterator($this->sourceMetadata['path']), function ($file) { |
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return !\is_dir($file); |
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}); |
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} |
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return $this->source; |
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} |
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/** @return Iterator */ |
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private function getDownloadsIterator() |
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{ |
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if (\is_string($this->source)) { |
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$listArgs = $this->getS3Args($this->sourceMetadata['path']); |
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if (isset($listArgs['Key'])) { |
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$listArgs['Prefix'] = $listArgs['Key'] . '/'; |
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unset($listArgs['Key']); |
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} |
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$files = $this->client->getPaginator('ListObjects', $listArgs)->search('Contents[].Key'); |
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$files = Aws\map($files, function ($key) use($listArgs) { |
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return "s3://{$listArgs['Bucket']}/{$key}"; |
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}); |
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return Aws\filter($files, function ($key) { |
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return \substr($key, -1, 1) !== '/'; |
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}); |
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} |
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return $this->source; |
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} |
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private function upload($filename) |
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{ |
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$args = $this->s3Args; |
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$args['SourceFile'] = $filename; |
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$args['Key'] = $this->createS3Key($filename); |
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$args['AddContentMD5'] = $this->addContentMD5; |
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$command = $this->client->getCommand('PutObject', $args); |
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$this->before and \call_user_func($this->before, $command); |
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return $this->client->executeAsync($command); |
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} |
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private function uploadMultipart($filename) |
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{ |
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$args = $this->s3Args; |
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$args['Key'] = $this->createS3Key($filename); |
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$filename = $filename instanceof \SplFileInfo ? $filename->getPathname() : $filename; |
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return (new MultipartUploader($this->client, $filename, ['bucket' => $args['Bucket'], 'key' => $args['Key'], 'before_initiate' => $this->before, 'before_upload' => $this->before, 'before_complete' => $this->before, 'concurrency' => $this->concurrency, 'add_content_md5' => $this->addContentMD5]))->promise(); |
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} |
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private function createS3Key($filename) |
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{ |
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$filename = $this->normalizePath($filename); |
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$relative_file_path = \ltrim(\preg_replace('#^' . \preg_quote($this->sourceMetadata['path']) . '#', '', $filename), '/\\'); |
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if (isset($this->s3Args['Key'])) { |
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return \rtrim($this->s3Args['Key'], '/') . '/' . $relative_file_path; |
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} |
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return $relative_file_path; |
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} |
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private function addDebugToBefore($debug) |
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{ |
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$before = $this->before; |
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$sourcePath = $this->sourceMetadata['path']; |
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$s3Args = $this->s3Args; |
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$this->before = static function (CommandInterface $command) use($before, $debug, $sourcePath, $s3Args) { |
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// Call the composed before function. |
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$before and $before($command); |
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// Determine the source and dest values based on operation. |
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switch ($operation = $command->getName()) { |
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case 'GetObject': |
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$source = "s3://{$command['Bucket']}/{$command['Key']}"; |
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$dest = $command['@http']['sink']; |
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break; |
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case 'PutObject': |
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$source = $command['SourceFile']; |
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$dest = "s3://{$command['Bucket']}/{$command['Key']}"; |
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break; |
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case 'UploadPart': |
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$part = $command['PartNumber']; |
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case 'CreateMultipartUpload': |
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case 'CompleteMultipartUpload': |
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$sourceKey = $command['Key']; |
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if (isset($s3Args['Key']) && \strpos($sourceKey, $s3Args['Key']) === 0) { |
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$sourceKey = \substr($sourceKey, \strlen($s3Args['Key']) + 1); |
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} |
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$source = "{$sourcePath}/{$sourceKey}"; |
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$dest = "s3://{$command['Bucket']}/{$command['Key']}"; |
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break; |
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default: |
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throw new \UnexpectedValueException("Transfer encountered an unexpected operation: {$operation}."); |
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} |
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// Print the debugging message. |
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$context = \sprintf('%s -> %s (%s)', $source, $dest, $operation); |
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if (isset($part)) { |
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$context .= " : Part={$part}"; |
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} |
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\fwrite($debug, "Transferring {$context}\n"); |
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}; |
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} |
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} |
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|
