Optimización eficiente de JPEG en PHP con jpegoptim

sudo apt-get update
sudo apt-get install jpegoptim

brew install jpegoptim

jpegoptim --version

<?php

declare(strict_types=1);

class ImageOptimizer {
    private string $binaryPath;
    private array $options;

    // Options are application-controlled configuration, never request data.
    public function __construct(array $options = []) {
        // Sensible defaults
        $this->options = array_merge([
            'all-progressive' => true // Lossless recompression; metadata is retained
        ], $options);

        $this->binaryPath = $this->findBinary();
    }

    private function findBinary(): string {
        // Check if the jpegoptim binary exists and is executable
        exec('command -v jpegoptim', $output, $returnVar);
        if ($returnVar !== 0 || empty($output[0])) {
            throw new RuntimeException('jpegoptim binary not found or not executable in system PATH.');
        }
        // Return the full path found
        return trim($output[0]);
    }

    public function optimize(string $inputPath, ?string $outputPath = null): bool {
        if (!file_exists($inputPath) || !is_readable($inputPath)) {
            throw new InvalidArgumentException('Input file does not exist or is not readable: ' . $inputPath);
        }

        // Validate file is actually a JPEG using MIME type
        $finfo = finfo_open(FILEINFO_MIME_TYPE);
        $mimeType = finfo_file($finfo, $inputPath);
        finfo_close($finfo);

        if ($mimeType !== 'image/jpeg') {
            throw new InvalidArgumentException(
                "Invalid file type: {$mimeType}. Only JPEG files are supported for file: " . $inputPath
            );
        }

        $targetPath = $outputPath ?? $inputPath;

        // If output path is specified, copy the file first
        if ($outputPath) {
            // Ensure output directory exists and is writable
            $outputDir = dirname($outputPath);
            if (!is_dir($outputDir) || !is_writable($outputDir)) {
                throw new RuntimeException("Output directory is not writable or does not exist: {$outputDir}");
            }
            if (!copy($inputPath, $outputPath)) {
                 throw new RuntimeException("Failed to copy file from {$inputPath} to output path: {$outputPath}");
            }
             // Ensure the copied file has appropriate permissions if needed
            // chmod($outputPath, 0644);
        }

        $command = $this->buildCommand($targetPath);
        exec($command, $cmdOutput, $returnVar);

        if ($returnVar !== 0) {
            // Clean up copied file on failure if output path was specified
            if ($outputPath && file_exists($outputPath) && $targetPath === $outputPath) {
                unlink($outputPath);
            }
            throw new RuntimeException(
                "jpegoptim optimization failed with code {$returnVar} for file {$targetPath}: " . implode("\n", $cmdOutput)
            );
        }

        return true;
    }

    private function buildCommand(string $path): string {
        $optionStrings = [];
        foreach ($this->options as $key => $value) {
            // Handle boolean flags (like --strip-all)
            if (is_bool($value) && $value) {
                $optionStrings[] = '--' . $key;
            // Handle options with values (like --max=85)
            } elseif (!is_bool($value)) {
                // Ensure value is properly escaped for shell argument
                $optionStrings[] = '--' . $key . '=' . escapeshellarg((string)$value);
            }
        }

        // Ensure the binary path and file path are properly escaped
        return sprintf(
            '%s %s %s',
            escapeshellarg($this->binaryPath), // Path to the jpegoptim binary
            implode(' ', $optionStrings),
            escapeshellarg($path) // Path to the image file
        );
    }
}

// Usage example
try {
    // Optimize with custom quality setting (lower quality = smaller size)
    $optimizer = new ImageOptimizer(['max' => 80]);
    $input = '/path/to/your/image.jpg';
    $output = '/path/to/your/optimized_image.jpg'; // Optional: specify output path

    // Ensure the input file exists and output directory is writable before calling
    if (!file_exists($input)) {
        throw new InvalidArgumentException("Input file does not exist: {$input}");
    }
    $outputDir = dirname($output);
    if (!is_dir($outputDir) || !is_writable($outputDir)) {
         throw new RuntimeException("Output directory is not writable: {$outputDir}");
    }

    // Optimize to a new file
    if ($optimizer->optimize($input, $output)) {
        echo "Image optimized successfully to {$output}.";
    } else {
        echo "Image optimization may have been skipped (e.g., no savings).";
    }

    // Example: Optimize in place
    // $optimizerInPlace = new ImageOptimizer(['max' => 85]);
    // if ($optimizerInPlace->optimize($input)) {
    //     echo "Image optimized successfully (in place).";
    // }

} catch (InvalidArgumentException $e) {
    error_log("Input error: " . $e->getMessage());
    echo "Error: Invalid input provided. Check logs.";
} catch (RuntimeException $e) {
    error_log("Optimization error: " . $e->getMessage());
    echo "Error: Optimization failed. Check logs.";
} catch (Exception $e) { // Catch any other unexpected errors
    error_log("General error: " . $e->getMessage());
    echo "An unexpected error occurred.";
}

composer require spatie/image-optimizer

<?php

require 'vendor/autoload.php';

use Spatie\ImageOptimizer\OptimizerChain;
use Spatie\ImageOptimizer\Optimizers\Jpegoptim;
use Psr\Log\NullLogger; // Or use your preferred PSR-3 logger

// Install jpegoptim separately. Omit --max to retain lossless compression.
$optimizerChain = (new OptimizerChain())
    ->addOptimizer(new Jpegoptim([
        '--all-progressive',
    ]))
    ->useLogger(new NullLogger()); // Replace with a real PSR-3 logger in production

$imagePath = '/path/to/image.jpg';

try {
    if (!file_exists($imagePath)) {
        throw new InvalidArgumentException("Image file does not exist: {$imagePath}");
    }
    $optimizerChain->optimize($imagePath); // Optimizes in place
    // To optimize to a different path:
    // $optimizerChain->optimize($imagePath, '/path/to/optimized_image.jpg');
    echo "Optimizer chain completed. Inspect logs and output for optimization results.";
} catch (Exception $e) {
    error_log("Error using spatie/image-optimizer for {$imagePath}: " . $e->getMessage());
    echo "An unexpected error occurred during optimization.";
}

<?php

// Assumes the ImageOptimizer class from the previous example is available
// require_once 'ImageOptimizer.php';

function optimizeDirectory(string $directory, ?int $quality = null, bool $recursive = false): array {
    $stats = [
        'processed' => 0,
        'skipped' => 0,
        'failed' => 0,
        'totalSavedBytes' => 0
    ];

    if (!is_dir($directory) || !is_readable($directory)) {
         error_log("Directory not found or not readable: {$directory}");
         return $stats; // Return empty stats if directory is invalid
    }

    try {
        // Initialize optimizer once
        $optimizer = new ImageOptimizer($quality === null ? [] : ['max' => $quality]);
    } catch (RuntimeException $e) {
        error_log("Failed to initialize ImageOptimizer: " . $e->getMessage() . " Cannot process directory {$directory}.");
        return $stats; // Cannot proceed without optimizer
    }

    $iteratorFlags = FilesystemIterator::KEY_AS_PATHNAME | FilesystemIterator::CURRENT_AS_FILEINFO | FilesystemIterator::SKIP_DOTS;
    $iterator = $recursive
        ? new RecursiveIteratorIterator(new RecursiveDirectoryIterator($directory, $iteratorFlags))
        : new DirectoryIterator($directory); // DirectoryIterator might be less efficient for large dirs

    $finfo = finfo_open(FILEINFO_MIME_TYPE);

    foreach ($iterator as $file) {
        // Skip directories explicitly if using DirectoryIterator or ensure it's a file
        if ($file->isDir() || !$file->isFile() || !$file->isReadable()) {
            continue;
        }

        $path = $file->getPathname();

        // Use mime type check for reliability
        $mimeType = finfo_file($finfo, $path);

        // Only process JPG/JPEG files
        if ($mimeType !== 'image/jpeg') {
            $stats['skipped']++;
            continue;
        }

        try {
            $sizeBefore = $file->getSize();
            // Optimize in place
            $optimizer->optimize($path);
            // Clear stat cache to get updated file size
            clearstatcache(true, $path);
            $sizeAfter = filesize($path); // Re-check size after optimization

            if ($sizeAfter === false) {
                 throw new RuntimeException("Could not get file size after optimization for {$path}");
            }

            $saved = $sizeBefore - $sizeAfter;

            if ($saved > 0) {
                $stats['processed']++;
                $stats['totalSavedBytes'] += $saved;
            } else {
                // Count as skipped if no size reduction occurred or size increased slightly
                $stats['skipped']++;
            }

        } catch (InvalidArgumentException $e) {
            // This might indicate a file became unreadable or is not a valid JPEG despite MIME type
            $stats['failed']++;
            error_log("Skipping invalid file {$path}: {$e->getMessage()}");
        } catch (RuntimeException $e) {
            // Catch errors from the optimize method (e.g., jpegoptim failure)
            $stats['failed']++;
            error_log("Failed to optimize {$path}: {$e->getMessage()}");
        } catch (Exception $e) {
            // Catch any other unexpected errors
            $stats['failed']++;
            error_log("Unexpected error optimizing {$path}: {$e->getMessage()}");
        }
    }

    finfo_close($finfo);
    return $stats;
}

// Usage example
// Ensure the target directory exists and has appropriate permissions
$targetDirectory = '/path/to/your/uploads';
if (is_dir($targetDirectory) && is_writable($targetDirectory)) {
    $results = optimizeDirectory($targetDirectory, null, true); // Lossless, recursive

    echo "--- Optimization Results for {$targetDirectory} ---\n";
    echo "Processed: {$results['processed']} images\n";
    echo "Skipped: {$results['skipped']} files (non-JPEG or no savings)\n";
    echo "Failed: {$results['failed']} images\n";
    echo "Total space saved: " . round($results['totalSavedBytes'] / 1024 / 1024, 2) . " MB\n";
} else {
    echo "Error: Target directory {$targetDirectory} does not exist or is not writable.\n";
}

composer require spatie/laravel-image-optimizer
php artisan vendor:publish --provider="Spatie\LaravelImageOptimizer\ImageOptimizerServiceProvider"

<?php
// config/image-optimizer.php
return [
    /*
     * When calling `optimize` the package will automatically determine which optimizers
     * should run for the given image.
     */
    'optimizers' => [
        Spatie\ImageOptimizer\Optimizers\Jpegoptim::class => [
            // '--max=85', // Opt into lossy recompression only when intended
            '--strip-all', // Remove all metadata
            '--all-progressive', // Convert to progressive JPEGs
            // '--force' // Uncomment if you want to force optimization even if it increases file size
        ],

        // Other optimizers like Pngquant, Optipng, Gifsicle can be configured here
        // Spatie\ImageOptimizer\Optimizers\Pngquant::class => [ ... ],
        // Spatie\ImageOptimizer\Optimizers\Optipng::class => [ ... ],
        // Spatie\ImageOptimizer\Optimizers\Gifsicle::class => [ ... ],
    ],

    /*
     * The maximum time in seconds each optimizer is allowed to run.
     */
    'timeout' => 60,

    /*
     * Whether to log optimizer activity.
     */
    'log_optimizer_activity' => env('IMAGE_OPTIMIZER_LOG_ACTIVITY', false),

];

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Facades\Log; // Use Laravel's Log facade
use Spatie\LaravelImageOptimizer\Facades\ImageOptimizer as Optimizer; // Use the Facade with an alias

class UploadController extends Controller
{
    public function store(Request $request)
    {
        $request->validate([
            'image' => 'required|image|mimes:jpeg,jpg|max:10240', // Example validation (10MB max)
        ]);

        if ($request->hasFile('image') && $request->file('image')->isValid()) {
            $image = $request->file('image');
            // Store the image using Laravel's filesystem (e.g., to 'public/uploads')
            // Using store() generates a unique name automatically
            $path = $image->store('uploads', 'public'); // Returns 'uploads/generated_filename.jpg'

            if (!$path) {
                return back()->with('error', 'Could not store the uploaded image.');
            }

            // Get the full path to the stored image on the server's filesystem
            $fullPath = Storage::disk('public')->path($path);

            // Optimize the image
            try {
                Optimizer::optimize($fullPath);
                Log::info("Successfully optimized image: {$fullPath}");
            } catch (\Exception $e) {
                // Log the error if optimization fails
                Log::error("Failed to optimize image {$fullPath}: " . $e->getMessage());
                // Decide how to handle the failure (e.g., proceed without optimization, return error)
                // For critical optimization, you might want to delete the file and return an error
                // Storage::disk('public')->delete($path);
                // return back()->with('error', 'Image uploaded but optimization failed.');
            }

            // Continue with your logic, e.g., save the path to the database
            $imageUrl = Storage::disk('public')->url($path);
            // Example: ImageModel::create(['path' => $path, 'url' => $imageUrl]);

            return back()->with('success', 'Image uploaded and optimized successfully! URL: ' . $imageUrl);
        } elseif ($request->hasFile('image')) {
             // Handle upload errors (e.g., file too large, invalid type before storing)
             return back()->with('error', 'Image upload failed: ' . $request->file('image')->getErrorMessage());
        }

        return back()->with('error', 'No valid image file was uploaded.');
    }
}

<?php

function advancedOptimizeJPEG(string $filePath, ?int $targetSizeKB = null, int $maxQuality = 85, bool $progressive = true, bool $stripAll = true, ?int $threshold = null): bool {
    // Basic validation
    if (!file_exists($filePath) || !is_readable($filePath)) {
        throw new InvalidArgumentException('File does not exist or is not readable: ' . $filePath);
    }
    $finfo = finfo_open(FILEINFO_MIME_TYPE);
    $mimeType = finfo_file($finfo, $filePath);
    finfo_close($finfo);
    if ($mimeType !== 'image/jpeg') {
        throw new InvalidArgumentException('Invalid or non-JPEG file provided: ' . $filePath);
    }

    $options = [];

    // Metadata stripping
    if ($stripAll) {
        $options[] = '--strip-all';
    }

    // Progressive conversion
    if ($progressive) {
        $options[] = '--all-progressive';
    } else {
        $options[] = '--all-normal'; // Explicitly set to baseline if not progressive
    }

    // Target size (enables lossy)
    if ($targetSizeKB !== null && $targetSizeKB > 0) {
        $options[] = "--size=" . escapeshellarg((string)$targetSizeKB);
        // Add --force if you strictly need to hit the size, even if quality drops significantly
        // $options[] = '--force';
    } else {
        // Max quality (enables lossy if not already enabled by --size)
        $options[] = "--max=" . escapeshellarg((string)$maxQuality);
    }

    // Threshold
    if ($threshold !== null && $threshold >= 0 && $threshold <= 100) {
        $options[] = "--threshold=" . escapeshellarg((string)$threshold);
    }

    // Add other options as needed, e.g., --preserve-perms
    // $options[] = '--preserve-perms';

    // Find jpegoptim binary path securely
    exec('command -v jpegoptim', $binaryOutput, $binaryReturnVar);
    if ($binaryReturnVar !== 0 || empty($binaryOutput[0])) {
        throw new RuntimeException('jpegoptim binary not found or not executable.');
    }
    $binaryPath = trim($binaryOutput[0]);

    $command = sprintf(
        '%s %s %s',
        escapeshellarg($binaryPath),
        implode(' ', $options),
        escapeshellarg($filePath)
    );

    exec($command, $output, $returnVar);

    if ($returnVar !== 0) {
        throw new RuntimeException("jpegoptim failed with code {$returnVar} for {$filePath}: " . implode("\n", $output));
    }

    return true; // Indicates command executed without critical error
}

// Usage example
try {
    $imagePath1 = '/path/to/image_q80.jpg';
    $imagePath2 = '/path/to/image_100k.jpg';

    // Ensure files exist and are writable before calling
    if (file_exists($imagePath1) && is_writable($imagePath1)) {
        // Optimize to max 80 quality, progressive, strip metadata, skip if less than 2% saved
        advancedOptimizeJPEG($imagePath1, null, 80, true, true, 2);
        echo "Image {$imagePath1} optimized with advanced options (quality 80, threshold 2%).\n";
    }

    if (file_exists($imagePath2) && is_writable($imagePath2)) {
        // Optimize targeting 100KB size, progressive, strip metadata
        advancedOptimizeJPEG($imagePath2, 100, 85, true, true); // maxQuality is less relevant when size is set
        echo "Image {$imagePath2} optimized with advanced options (target 100KB).\n";
    }

} catch (InvalidArgumentException $e) {
    echo "Error: " . $e->getMessage() . "\n";
} catch (RuntimeException $e) {
    echo "Error during optimization: " . $e->getMessage() . "\n";
}

<?php
// Example within an upload processing function/controller action

/**
 * Securely handles an uploaded image file, validates it, moves it,
 * and attempts optimization.
 *
 * @param array $uploadedFileInfo The entry from $_FILES for the uploaded image.
 * @param string $destinationDir The absolute path to the directory to store the final image.
 * @param int $maxSize Maximum allowed file size in bytes.
 * @return string|false The final path of the optimized image on success, false on failure.
 */
function handleAndOptimizeUpload(array $uploadedFileInfo, string $destinationDir, int $maxSize = 10485760 /* 10MB */): string|false
{
    // 1. Check for basic upload errors
    if (!isset($uploadedFileInfo['error']) || is_array($uploadedFileInfo['error'])) {
        error_log('Invalid parameters received for file upload.');
        return false;
    }
    switch ($uploadedFileInfo['error']) {
        case UPLOAD_ERR_OK:
            break;
        case UPLOAD_ERR_NO_FILE:
            error_log('No file sent.'); return false;
        case UPLOAD_ERR_INI_SIZE:
        case UPLOAD_ERR_FORM_SIZE:
            error_log('Exceeded filesize limit.'); return false;
        default:
            error_log('Unknown upload error.'); return false;
    }

    // 2. Check file size against our limit
    if ($uploadedFileInfo['size'] > $maxSize) {
        error_log('Exceeded filesize limit: ' . $uploadedFileInfo['size'] . ' bytes.');
        return false;
    }

    // 3. Verify it's a valid upload and check MIME type *before* moving
    $tempPath = $uploadedFileInfo['tmp_name'];
    if (!is_uploaded_file($tempPath)) {
        error_log('Invalid upload: File is not an uploaded file.');
        return false;
    }

    $finfo = finfo_open(FILEINFO_MIME_TYPE);
    $mimeType = finfo_file($finfo, $tempPath);
    finfo_close($finfo);

    if ($mimeType !== 'image/jpeg') {
        error_log("Invalid MIME type ({$mimeType}) for uploaded file: " . $uploadedFileInfo['name']);
        // No need to unlink tempPath, PHP handles it
        return false;
    }

    // 4. Generate a secure, unique destination path
    // Ensure destination directory exists and is writable
    if (!is_dir($destinationDir) || !is_writable($destinationDir)) {
        error_log("Destination directory is not writable or does not exist: {$destinationDir}");
        return false;
    }
    // Create a unique filename to avoid collisions and using user input
    $safeFilename = bin2hex(random_bytes(16)) . '.jpg';
    $destinationPath = rtrim($destinationDir, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR . $safeFilename;

    // 5. Move the uploaded file securely
    if (!move_uploaded_file($tempPath, $destinationPath)) {
        error_log("Failed to move uploaded file '{$uploadedFileInfo['name']}' to {$destinationPath}");
        return false;
    }

    // 6. Optimize the moved file (using the robust class)
    try {
        // Set appropriate permissions if needed (e.g., 0644)
        chmod($destinationPath, 0644);

        $optimizer = new ImageOptimizer(['max' => 80]); // Load options from config ideally
        $optimizer->optimize($destinationPath); // Optimize in place

        // Log success
        error_log("File uploaded and optimized successfully to: {$destinationPath}");
        return $destinationPath; // Return the final path

    } catch (Exception $e) {
        error_log("Optimization failed for {$destinationPath} (original upload: {$uploadedFileInfo['name']}): " . $e->getMessage());
        // Decide whether to keep the unoptimized file or delete it
        // For consistency, maybe delete it if optimization is required
        // unlink($destinationPath);
        // return false;

        // Or, keep the unoptimized file and return its path, logging the optimization failure
         error_log("Kept unoptimized file at {$destinationPath} due to optimization error.");
         return $destinationPath; // Return path even if optimization failed
    }
}

// Example usage within a request handler (simplified):
/*
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_FILES['user_image'])) {
    $uploadDir = '/var/www/my_app/storage/uploads'; // Secure, non-web-accessible ideally

    $finalPath = handleAndOptimizeUpload($_FILES['user_image'], $uploadDir);

    if ($finalPath) {
        echo "File processed successfully. Final path: " . htmlspecialchars($finalPath);
        // Store $finalPath in DB, etc.
    } else {
        echo "File processing failed. Check server logs.";
        // http_response_code(500); // Or appropriate error code
    }
}
*/
?>