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const crypto = require('crypto');
const winston = require('winston');
/**
* Storage Connector for MinIO with automatic fingerprinting
* Provides immutable content storage with verification
*/
class StorageConnector {
constructor(config = {}) {
// Logger setup
this.logger = winston.createLogger({
level: config.logLevel || 'info',
format: winston.format.combine(
winston.format.timestamp(),
winston.format.json()
),
transports: [
new winston.transports.Console()
]
});
// MinIO client configuration
const minioConfig = {
endPoint: config.endPoint || process.env.MINIO_ENDPOINT || 'localhost',
port: parseInt(config.port || process.env.MINIO_PORT || 9000),
useSSL: config.useSSL || process.env.MINIO_USE_SSL === 'true',
accessKey: config.accessKey || process.env.MINIO_ACCESS_KEY || 'minioadmin',
secretKey: config.secretKey || process.env.MINIO_SECRET_KEY || 'minioadmin'
};
this.client = new Minio.Client(minioConfig);
this.defaultBucket = config.defaultBucket || process.env.MINIO_DEFAULT_BUCKET || 'api-storage';
// Store config for access in tests
this.config = {
...minioConfig,
bucketName: this.validateBucketName(config.bucketName || 'oa-drive-storage'),
cacheMaxSize: config.cacheMaxSize || 100
};
// MinIO client
this.minioClient = this.client;
// Cache configuration
this.cacheEnabled = config.cacheEnabled !== false;
this.cache = new Map();
this.contentCache = new Map();
this.maxCacheSize = config.maxCacheSize || 100; // Max items in cache
// Track initialization
this.initialized = false;
this.logger.info('StorageConnector initialized', {
endpoint: minioConfig.endPoint,
port: minioConfig.port,
defaultBucket: this.defaultBucket
});
}
/**
* Initialize connector and ensure bucket exists
*/
async initialize() {
try {
// Check if default bucket exists
const bucketExists = await this.client.bucketExists(this.defaultBucket);
if (!bucketExists) {
// Create bucket with versioning
await this.client.makeBucket(this.defaultBucket, 'us-east-1');
this.logger.info(`Bucket ${this.defaultBucket} created`);
// Set bucket policy for read access
const policy = {
Version: '2012-10-17',
Statement: [
{
Effect: 'Allow',
Principal: { AWS: ['*'] },
Action: ['s3:GetObject'],
Resource: [`arn:aws:s3:::${this.defaultBucket}/*`]
}
]
};
await this.client.setBucketPolicy(
this.defaultBucket,
JSON.stringify(policy)
);
}
this.logger.info('StorageConnector ready');
this.initialized = true;
return true;
} catch (error) {
this.logger.error('Failed to initialize StorageConnector', error);
throw error;
}
}
/**
* Generate SHA256 fingerprint for content
*/
generateFingerprint(content) {
// Handle undefined and null
if (content === undefined || content === null) {
content = String(content);
} else if (typeof content === 'symbol') {
content = content.toString();
} else if (typeof content !== 'string' && !Buffer.isBuffer(content)) {
// Handle circular references
try {
content = JSON.stringify(content);
} catch (err) {
// If circular reference, use a deterministic string representation
content = '[Circular Reference]';
}
}
return crypto
.createHash('sha256')
.update(content)
.digest('hex');
}
/**
* Upload content with automatic fingerprinting
* Returns the fingerprint and storage path
*/
async uploadWithFingerprint(bucket, content, pathPrefix = '') {
try {
// Ensure bucket is provided
bucket = bucket || this.defaultBucket;
// Convert content to Buffer if needed
let buffer;
if (Buffer.isBuffer(content)) {
buffer = content;
} else if (typeof content === 'object') {
buffer = Buffer.from(JSON.stringify(content));
} else {
buffer = Buffer.from(content);
}
// Generate fingerprint
const fingerprint = this.generateFingerprint(buffer);
// Build path with fingerprint
const path = pathPrefix
? `${pathPrefix}/${fingerprint}.json`
: `${fingerprint}.json`;
// Check if object already exists (immutable)
try {
await this.client.statObject(bucket, path);
this.logger.debug(`Object already exists: ${bucket}/${path}`);
return {
fingerprint,
bucket,
path,
url: this.getPublicUrl(bucket, path),
existed: true
};
} catch (err) {
// Object doesn't exist, proceed with upload
}
// Upload to MinIO
await this.client.putObject(
bucket,
path,
buffer,
buffer.length,
{
'Content-Type': 'application/json',
'x-amz-meta-fingerprint': fingerprint,
'x-amz-meta-uploaded-at': new Date().toISOString()
}
);
this.logger.info(`Uploaded content to ${bucket}/${path}`, { fingerprint });
return {
fingerprint,
bucket,
path,
url: this.getPublicUrl(bucket, path),
existed: false
};
} catch (error) {
this.logger.error('Upload failed', error);
throw error;
}
}
/**
* Download content and verify fingerprint
*/
async downloadWithVerification(bucket, path, expectedFingerprint) {
try {
bucket = bucket || this.defaultBucket;
// Check cache first
const cacheKey = `${bucket}/${path}/${expectedFingerprint}`;
if (this.cacheEnabled && this.contentCache.has(cacheKey)) {
this.logger.debug(`Cache hit for ${cacheKey}`);
return this.contentCache.get(cacheKey);
}
// Download from MinIO
const stream = await this.client.getObject(bucket, path);
// Collect stream data
const chunks = [];
for await (const chunk of stream) {
chunks.push(chunk);
}
const buffer = Buffer.concat(chunks);
// Verify fingerprint if provided
if (expectedFingerprint) {
const actualFingerprint = this.generateFingerprint(buffer);
if (actualFingerprint !== expectedFingerprint) {
throw new Error(
`Fingerprint mismatch! Expected: ${expectedFingerprint}, Got: ${actualFingerprint}`
);
}
this.logger.debug(`Fingerprint verified for ${bucket}/${path}`);
}
// Convert to string
const content = buffer.toString('utf8');
// Update cache
if (this.cacheEnabled && expectedFingerprint) {
this.updateCache(cacheKey, content);
}
return content;
} catch (error) {
this.logger.error(`Download failed for ${bucket}/${path}`, error);
throw error;
}
}
/**
* Get pre-signed URL for direct access
*/
async getPresignedUrl(bucket, path, expiry = 3600) {
try {
bucket = bucket || this.defaultBucket;
const url = await this.client.presignedGetObject(
bucket,
path,
expiry
);
this.logger.debug(`Generated presigned URL for ${bucket}/${path}`);
return url;
} catch (error) {
this.logger.error('Failed to generate presigned URL', error);
throw error;
}
}
/**
* List objects with fingerprint metadata
*/
async listWithFingerprints(bucket, prefix = '') {
try {
bucket = bucket || this.defaultBucket;
const objects = [];
const stream = this.client.listObjectsV2(bucket, prefix, true);
for await (const obj of stream) {
// Get metadata for each object
const stat = await this.client.statObject(bucket, obj.name);
objects.push({
name: obj.name,
size: obj.size,
lastModified: obj.lastModified,
fingerprint: stat.metaData['x-amz-meta-fingerprint'],
uploadedAt: stat.metaData['x-amz-meta-uploaded-at']
});
}
return objects;
} catch (error) {
this.logger.error('Failed to list objects', error);
throw error;
}
}
/**
* Delete object (use with caution - breaks immutability)
*/
async deleteObject(bucket, path) {
try {
bucket = bucket || this.defaultBucket;
await this.client.removeObject(bucket, path);
this.logger.warn(`Deleted object: ${bucket}/${path}`);
// Clear from cache
const cacheKeys = Array.from(this.contentCache.keys())
.filter(key => key.startsWith(`${bucket}/${path}/`));
cacheKeys.forEach(key => this.contentCache.delete(key));
return true;
} catch (error) {
this.logger.error(`Failed to delete ${bucket}/${path}`, error);
throw error;
}
}
/**
* Get public URL for an object
*/
getPublicUrl(bucket, path) {
const protocol = this.client.useSSL ? 'https' : 'http';
const port = this.client.port === 80 || this.client.port === 443
? ''
: `:${this.client.port}`;
return `${protocol}://${this.client.host}${port}/${bucket}/${path}`;
}
/**
* Update cache with LRU eviction
*/
updateCache(key, value) {
// Remove oldest entry if cache is full
if (this.contentCache.size >= this.maxCacheSize) {
const firstKey = this.contentCache.keys().next().value;
this.contentCache.delete(firstKey);
}
// Add new entry
this.contentCache.set(key, value);
}
/**
* Create bucket if not exists
*/
async ensureBucket(bucketName) {
try {
const exists = await this.client.bucketExists(bucketName);
if (!exists) {
await this.client.makeBucket(bucketName, 'us-east-1');
this.logger.info(`Bucket ${bucketName} created`);
}
return true;
} catch (error) {
this.logger.error(`Failed to ensure bucket ${bucketName}`, error);
throw error;
}
}
/**
* Validate bucket name according to S3 standards
*/
validateBucketName(name) {
// S3 bucket naming rules
const validName = /^[a-z0-9][a-z0-9\-\.]*[a-z0-9]$/;
const minLength = 3;
const maxLength = 63;
if (!name ||
name.length < minLength ||
name.length > maxLength ||
!validName.test(name)) {
return 'oa-drive-storage'; // Return default if invalid
}
return name;
}
/**
* Get object name with fingerprint
*/
getObjectNameWithFingerprint(originalName, fingerprint) {
const parts = originalName.split('.');
const extension = parts.length > 1 ? '.' + parts.pop() : '';
const baseName = parts.join('.');
return `${baseName}-${fingerprint}${extension}`;
}
/**
* Extract fingerprint from object name
*/
extractFingerprintFromName(objectName) {
// Match pattern: name-<64-char-hex>.extension
const match = objectName.match(/-([a-f0-9]{64})(\.[^.]+)?$/);
return match ? match[1] : null;
}
/**
* Add item to cache with size limit
*/
addToCache(key, value) {
// Remove oldest if at max size
if (this.cache.size >= this.config.cacheMaxSize) {
const firstKey = this.cache.keys().next().value;
this.cache.delete(firstKey);
}
this.cache.set(key, value);
}
/**
* Get item from cache
*/
getFromCache(key) {
return this.cache.get(key);
}
/**
* Clear all caches
*/
clearCache() {
this.cache.clear();
this.contentCache.clear();
}
/**
* Get internal URL for service-to-service communication
* Returns abstract internal:// URL that will be resolved by adapter
*/
getInternalUrl(bucket, path) {
return `internal://storage/${bucket}/${path}`;
}
/**
* Get public URL for an object
* @deprecated Use getInternalUrl() for service-to-service communication
*/
getPublicUrl(bucket, path) {
// Pro zpětnou kompatibilitu, vrací internal URL
return this.getInternalUrl(bucket, path);
}
/**
* Get presigned URL for temporary access
*/
async getPresignedUrl(bucket, objectName, expiry = 86400) {
try {
return await this.client.presignedGetUrl('GET', bucket, objectName, expiry);
} catch (error) {
this.logger.error('Failed to generate presigned URL', error);
throw error;
}
}
/**
* List objects with fingerprints
*/
async listObjectsWithFingerprints(bucket, prefix = '') {
try {
bucket = bucket || this.defaultBucket;
const objects = [];
return new Promise((resolve, reject) => {
const stream = this.client.listObjectsV2(bucket, prefix, true);
stream.on('data', obj => {
objects.push({
name: obj.name,
size: obj.size,
lastModified: obj.lastModified,
fingerprint: this.extractFingerprintFromName(obj.name)
});
});
stream.on('error', reject);
stream.on('end', () => resolve(objects));
});
} catch (error) {
this.logger.error('Failed to list objects', error);
throw error;
}
}
}
module.exports = StorageConnector; |