mirror of
https://github.com/danog/file.git
synced 2024-11-26 20:04:51 +01:00
590 lines
17 KiB
PHP
590 lines
17 KiB
PHP
<?php
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namespace Amp\File;
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use Amp\Coroutine;
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use Amp\Deferred;
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use Amp\File\Internal\UvPoll;
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use Amp\Loop;
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use Amp\Promise;
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use Amp\Success;
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class UvDriver implements Driver {
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/** @var \Amp\Loop\Driver */
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private $driver;
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/** @var \UVLoop|resource Loop resource of type uv_loop or instance of \UVLoop. */
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private $loop;
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/** @var UvPoll */
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private $poll;
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/**
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* @param \Amp\Loop\UvDriver $driver
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*/
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public function __construct(Loop\UvDriver $driver) {
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$this->driver = $driver;
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$this->loop = $driver->getHandle();
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$this->poll = new UvPoll;
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}
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/**
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* {@inheritdoc}
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*/
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public function open(string $path, string $mode): Promise {
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$flags = $this->parseMode($mode);
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$chmod = ($flags & \UV::O_CREAT) ? 0644 : 0;
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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$openArr = [$mode, $path, $deferred];
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\uv_fs_open($this->loop, $path, $flags, $chmod, function ($fh) use ($openArr) {
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if ($fh) {
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$this->onOpenHandle($fh, $openArr);
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} else {
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list(, $path, $deferred) = $openArr;
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$deferred->fail(new FilesystemException(
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"Failed opening file handle to $path"
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));
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}
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});
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return $deferred->promise();
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}
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private function parseMode(string $mode): int {
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$mode = \str_replace(['b', 't'], '', $mode);
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switch ($mode) {
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case "r": return \UV::O_RDONLY;
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case "r+": return \UV::O_RDWR;
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case "w": return \UV::O_WRONLY | \UV::O_CREAT;
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case "w+": return \UV::O_RDWR | \UV::O_CREAT;
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case "a": return \UV::O_WRONLY | \UV::O_CREAT | \UV::O_APPEND;
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case "a+": return \UV::O_RDWR | \UV::O_CREAT | \UV::O_APPEND;
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case "x": return \UV::O_WRONLY | \UV::O_CREAT | \UV::O_EXCL;
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case "x+": return \UV::O_RDWR | \UV::O_CREAT | \UV::O_EXCL;
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case "c": return \UV::O_WRONLY | \UV::O_CREAT;
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case "c+": return \UV::O_RDWR | \UV::O_CREAT;
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default:
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throw new \Error('Invalid file mode');
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}
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}
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private function onOpenHandle($fh, array $openArr) {
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list($mode) = $openArr;
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if ($mode[0] === "w") {
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\uv_fs_ftruncate($this->loop, $fh, $length = 0, function ($fh) use ($openArr) {
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if ($fh) {
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$this->finalizeHandle($fh, $size = 0, $openArr);
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} else {
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list(, $path, $deferred) = $openArr;
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$deferred->fail(new FilesystemException(
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"Failed truncating file $path"
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));
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}
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});
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} else {
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\uv_fs_fstat($this->loop, $fh, function ($fh, $stat) use ($openArr) {
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if ($fh) {
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StatCache::set($openArr[1], $stat);
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$this->finalizeHandle($fh, $stat["size"], $openArr);
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} else {
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list(, $path, $deferred) = $openArr;
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$deferred->fail(new FilesystemException(
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"Failed reading file size from open handle pointing to $path"
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));
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}
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});
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}
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}
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private function finalizeHandle($fh, $size, array $openArr) {
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list($mode, $path, $deferred) = $openArr;
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$handle = new UvHandle($this->driver, $this->poll, $fh, $path, $mode, $size);
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$deferred->resolve($handle);
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}
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/**
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* {@inheritdoc}
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*/
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public function stat(string $path): Promise {
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if ($stat = StatCache::get($path)) {
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return new Success($stat);
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}
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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\uv_fs_stat($this->loop, $path, function ($fh, $stat) use ($deferred, $path) {
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if (empty($fh)) {
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$stat = null;
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} else {
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StatCache::set($path, $stat);
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}
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$deferred->resolve($stat);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function exists(string $path): Promise {
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$deferred = new Deferred;
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$this->stat($path)->onResolve(function ($error, $result) use ($deferred) {
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$deferred->resolve((bool) $result);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function isdir(string $path): Promise {
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$deferred = new Deferred;
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$this->stat($path)->onResolve(function ($error, $result) use ($deferred) {
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if ($result) {
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$deferred->resolve(!($result["mode"] & \UV::S_IFREG));
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} else {
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$deferred->resolve(false);
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}
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function isfile(string $path): Promise {
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$deferred = new Deferred;
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$this->stat($path)->onResolve(function ($error, $result) use ($deferred) {
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if ($result) {
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$deferred->resolve((bool) ($result["mode"] & \UV::S_IFREG));
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} else {
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$deferred->resolve(false);
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}
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function size(string $path): Promise {
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$deferred = new Deferred;
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$this->stat($path)->onResolve(function ($error, $result) use ($deferred) {
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if (empty($result)) {
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$deferred->fail(new FilesystemException(
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"Specified path does not exist"
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));
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} elseif (($result["mode"] & \UV::S_IFREG)) {
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$deferred->resolve($result["size"]);
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} else {
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$deferred->fail(new FilesystemException(
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"Specified path is not a regular file"
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));
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}
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function mtime(string $path): Promise {
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$deferred = new Deferred;
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$this->stat($path)->onResolve(function ($error, $result) use ($deferred) {
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if ($result) {
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$deferred->resolve($result["mtime"]);
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} else {
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$deferred->fail(new FilesystemException(
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"Specified path does not exist"
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));
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}
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function atime(string $path): Promise {
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$deferred = new Deferred;
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$this->stat($path)->onResolve(function ($error, $result) use ($deferred) {
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if ($result) {
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$deferred->resolve($result["atime"]);
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} else {
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$deferred->fail(new FilesystemException(
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"Specified path does not exist"
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));
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}
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function ctime(string $path): Promise {
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$deferred = new Deferred;
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$this->stat($path)->onResolve(function ($error, $result) use ($deferred) {
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if ($result) {
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$deferred->resolve($result["ctime"]);
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} else {
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$deferred->fail(new FilesystemException(
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"Specified path does not exist"
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));
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}
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function lstat(string $path): Promise {
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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\uv_fs_lstat($this->loop, $path, function ($fh, $stat) use ($deferred) {
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if (empty($fh)) {
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$stat = null;
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}
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$deferred->resolve($stat);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function symlink(string $target, string $link): Promise {
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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\uv_fs_symlink($this->loop, $target, $link, \UV::S_IRWXU | \UV::S_IRUSR, function ($fh) use ($deferred) {
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$deferred->resolve((bool) $fh);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function link(string $target, string $link): Promise {
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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\uv_fs_link($this->loop, $target, $link, \UV::S_IRWXU | \UV::S_IRUSR, function ($fh) use ($deferred) {
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$deferred->resolve((bool) $fh);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function readlink(string $path): Promise {
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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\uv_fs_readlink($this->loop, $path, function ($fh) use ($deferred) {
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$deferred->resolve((bool) $fh);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function rename(string $from, string $to): Promise {
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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\uv_fs_rename($this->loop, $from, $to, function ($fh) use ($deferred, $from) {
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StatCache::clear($from);
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$deferred->resolve((bool) $fh);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function unlink(string $path): Promise {
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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\uv_fs_unlink($this->loop, $path, function ($fh) use ($deferred, $path) {
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StatCache::clear($path);
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$deferred->resolve((bool) $fh);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function mkdir(string $path, int $mode = 0644, bool $recursive = false): Promise {
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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if ($recursive) {
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$path = str_replace("/", DIRECTORY_SEPARATOR, $path);
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$arrayPath = explode(DIRECTORY_SEPARATOR, $path);
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$tmpPath = "";
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$callback = function () use (
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&$callback, &$arrayPath, &$tmpPath, $mode, $deferred
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) {
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$tmpPath .= DIRECTORY_SEPARATOR . array_shift($arrayPath);
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if (empty($arrayPath)) {
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\uv_fs_mkdir($this->loop, $tmpPath, $mode, function ($fh) use ($deferred) {
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$deferred->resolve((bool) $fh);
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});
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} else {
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$this->isdir($tmpPath)->onResolve(function ($error, $result) use (
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$callback, $tmpPath, $mode
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) {
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if ($result) {
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$callback();
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} else {
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\uv_fs_mkdir($this->loop, $tmpPath, $mode, $callback);
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}
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});
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}
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};
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$callback();
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} else {
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\uv_fs_mkdir($this->loop, $path, $mode, function ($fh) use ($deferred) {
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$deferred->resolve((bool) $fh);
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});
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}
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function rmdir(string $path): Promise {
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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\uv_fs_rmdir($this->loop, $path, function ($fh) use ($deferred, $path) {
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StatCache::clear($path);
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$deferred->resolve((bool) $fh);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function scandir(string $path): Promise {
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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uv_fs_readdir($this->loop, $path, 0, function ($fh, $data) use ($deferred, $path) {
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if (empty($fh)) {
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$deferred->fail(new FilesystemException("Failed reading contents from {$path}"));
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} else {
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$deferred->resolve($data);
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}
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function chmod(string $path, int $mode): Promise {
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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\uv_fs_chmod($this->loop, $path, $mode, function ($fh) use ($deferred) {
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$deferred->resolve((bool) $fh);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function chown(string $path, int $uid, int $gid): Promise {
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// @TODO Return a failure in windows environments
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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\uv_fs_chown($this->loop, $path, $uid, $gid, function ($fh) use ($deferred) {
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$deferred->resolve((bool) $fh);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function touch(string $path): Promise {
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$atime = $mtime = time();
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$deferred = new Deferred;
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$this->poll->listen($deferred->promise());
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\uv_fs_utime($this->loop, $path, $mtime, $atime, function () use ($deferred) {
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// The uv_fs_utime() callback does not receive any args at this time
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$deferred->resolve(true);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function get(string $path): Promise {
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$promise = new Coroutine($this->doGet($path));
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$this->poll->listen($promise);
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return $promise;
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}
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private function doGet($path): \Generator {
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$promise = $this->doFsOpen($path, $flags = \UV::O_RDONLY, $mode = 0);
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if (!$fh = yield $promise) {
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throw new FilesystemException("Failed opening file handle: {$path}");
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}
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$deferred = new Deferred;
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$stat = yield $this->doFsStat($fh);
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if (empty($stat)) {
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$deferred->fail(new FilesystemException("stat operation failed on open file handle"));
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} elseif (!$stat["isfile"]) {
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\uv_fs_close($this->loop, $fh, function () use ($deferred) {
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$deferred->fail(new FilesystemException("cannot buffer contents: path is not a file"));
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});
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} else {
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$buffer = yield $this->doFsRead($fh, $offset = 0, $stat["size"]);
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if ($buffer === false) {
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\uv_fs_close($this->loop, $fh, function () use ($deferred) {
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$deferred->fail(new FilesystemException("read operation failed on open file handle"));
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});
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} else {
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\uv_fs_close($this->loop, $fh, function () use ($deferred, $buffer) {
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$deferred->resolve($buffer);
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});
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}
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}
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return yield $deferred->promise();
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}
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private function doFsOpen($path, $flags, $mode) {
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$deferred = new Deferred;
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\uv_fs_open($this->loop, $path, $flags, $mode, function ($fh) use ($deferred, $path) {
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$deferred->resolve($fh);
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});
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return $deferred->promise();
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}
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private function doFsStat($fh) {
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$deferred = new Deferred;
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\uv_fs_fstat($this->loop, $fh, function ($fh, $stat) use ($deferred) {
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if ($fh) {
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$stat["isdir"] = (bool) ($stat["mode"] & \UV::S_IFDIR);
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$stat["isfile"] = !$stat["isdir"];
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$deferred->resolve($stat);
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} else {
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$deferred->resolve();
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}
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});
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return $deferred->promise();
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}
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private function doFsRead($fh, $offset, $len) {
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$deferred = new Deferred;
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\uv_fs_read($this->loop, $fh, $offset, $len, function ($fh, $nread, $buffer) use ($deferred) {
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$deferred->resolve($nread < 0 ? false : $buffer);
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});
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return $deferred->promise();
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}
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/**
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* {@inheritdoc}
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*/
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public function put(string $path, string $contents): Promise {
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$promise = new Coroutine($this->doPut($path, $contents));
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$this->poll->listen($promise);
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|
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return $promise;
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}
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|
|
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private function doPut($path, $contents): \Generator {
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$flags = \UV::O_WRONLY | \UV::O_CREAT;
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$mode = \UV::S_IRWXU | \UV::S_IRUSR;
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|
|
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$promise = $this->doFsOpen($path, $flags, $mode);
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|
|
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if (!$fh = yield $promise) {
|
|
throw new FilesystemException("Failed opening write file handle");
|
|
}
|
|
|
|
$deferred = new Deferred;
|
|
$len = strlen($contents);
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|
|
|
\uv_fs_write($this->loop, $fh, $contents, $offset = 0, function ($fh, $result) use ($deferred, $len) {
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|
\uv_fs_close($this->loop, $fh, function () use ($deferred, $result, $len) {
|
|
if ($result < 0) {
|
|
$deferred->fail(new FilesystemException(\uv_strerror($result)));
|
|
} else {
|
|
$deferred->resolve($len);
|
|
}
|
|
});
|
|
});
|
|
|
|
return yield $deferred->promise();
|
|
}
|
|
}
|