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index.js
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// S3Adapter
//
// Stores Parse files in AWS S3.
const AWS = require('aws-sdk');
const optionsFromArguments = require('./lib/optionsFromArguments');
const awsCredentialsDeprecationNotice = function awsCredentialsDeprecationNotice() {
// eslint-disable-next-line no-console
console.warn('Passing AWS credentials to this adapter is now DEPRECATED and will be removed in a future version',
'See: https://github.com/parse-server-modules/parse-server-s3-adapter#aws-credentials for details');
};
const serialize = (obj) => {
const str = [];
Object.keys(obj).forEach((key) => {
if (obj[key]) {
str.push(`${encodeURIComponent(key)}=${encodeURIComponent(obj[key])}`);
}
});
return str.join('&');
};
function buildDirectAccessUrl(baseUrl, baseUrlFileKey, presignedUrl, config, filename) {
let directAccessUrl;
if (typeof baseUrl === 'function') {
directAccessUrl = `${baseUrl(config, filename)}/${baseUrlFileKey}`;
} else {
directAccessUrl = `${baseUrl}/${baseUrlFileKey}`;
}
if (presignedUrl) {
directAccessUrl += presignedUrl.substring(presignedUrl.indexOf('?'));
}
return directAccessUrl;
}
class S3Adapter {
// Creates an S3 session.
// Providing AWS access, secret keys and bucket are mandatory
// Region will use sane defaults if omitted
constructor(...args) {
const options = optionsFromArguments(args);
this._region = options.region;
this._bucket = options.bucket;
this._bucketPrefix = options.bucketPrefix;
this._directAccess = options.directAccess;
this._fileAcl = options.fileAcl;
this._baseUrl = options.baseUrl;
this._baseUrlDirect = options.baseUrlDirect;
this._signatureVersion = options.signatureVersion;
this._globalCacheControl = options.globalCacheControl;
this._presignedUrl = options.presignedUrl;
this._presignedUrlExpires = parseInt(options.presignedUrlExpires, 10);
this._encryption = options.ServerSideEncryption;
this._generateKey = options.generateKey;
// Optional FilesAdaptor method
this.validateFilename = options.validateFilename;
const s3Options = {
params: { Bucket: this._bucket },
region: this._region,
signatureVersion: this._signatureVersion,
globalCacheControl: this._globalCacheControl,
};
if (options.accessKey && options.secretKey) {
awsCredentialsDeprecationNotice();
s3Options.accessKeyId = options.accessKey;
s3Options.secretAccessKey = options.secretKey;
}
Object.assign(s3Options, options.s3overrides);
this._s3Client = new AWS.S3(s3Options);
this._hasBucket = false;
}
createBucket() {
let promise;
if (this._hasBucket) {
promise = Promise.resolve();
} else {
promise = new Promise((resolve) => {
this._s3Client.createBucket(() => {
this._hasBucket = true;
resolve();
});
});
}
return promise;
}
// For a given config object, filename, and data, store a file in S3
// Returns a promise containing the S3 object creation response
createFile(filename, data, contentType, options = {}) {
const params = {
Key: this._bucketPrefix + filename,
Body: data,
};
if (this._generateKey instanceof Function) {
params.Key = this._bucketPrefix + this._generateKey(filename);
}
if (this._fileAcl) {
if (this._fileAcl === 'none') {
delete params.ACL;
} else {
params.ACL = this._fileAcl;
}
} else if (this._directAccess) {
params.ACL = 'public-read';
}
if (contentType) {
params.ContentType = contentType;
}
if (this._globalCacheControl) {
params.CacheControl = this._globalCacheControl;
}
if (this._encryption === 'AES256' || this._encryption === 'aws:kms') {
params.ServerSideEncryption = this._encryption;
}
if (options.metadata && typeof options.metadata === 'object') {
params.Metadata = options.metadata;
}
if (options.tags && typeof options.tags === 'object') {
const serializedTags = serialize(options.tags);
params.Tagging = serializedTags;
}
return this.createBucket().then(() => new Promise((resolve, reject) => {
this._s3Client.upload(params, (err, response) => {
if (err !== null) {
return reject(err);
}
return resolve(response);
});
}));
}
deleteFile(filename) {
return this.createBucket().then(() => new Promise((resolve, reject) => {
const params = {
Key: this._bucketPrefix + filename,
};
this._s3Client.deleteObject(params, (err, data) => {
if (err !== null) {
return reject(err);
}
return resolve(data);
});
}));
}
// Search for and return a file if found by filename
// Returns a promise that succeeds with the buffer result from S3
getFileData(filename) {
const params = { Key: this._bucketPrefix + filename };
return this.createBucket().then(() => new Promise((resolve, reject) => {
this._s3Client.getObject(params, (err, data) => {
if (err !== null) {
return reject(err);
}
// Something happened here...
if (data && !data.Body) {
return reject(data);
}
return resolve(data.Body);
});
}));
}
// Generates and returns the location of a file stored in S3 for the given request and filename
// The location is the direct S3 link if the option is set,
// otherwise we serve the file through parse-server
getFileLocation(config, filename) {
const fileName = filename.split('/').map(encodeURIComponent).join('/');
if (!this._directAccess) {
return `${config.mount}/files/${config.applicationId}/${fileName}`;
}
const fileKey = `${this._bucketPrefix}${fileName}`;
let presignedUrl = '';
if (this._presignedUrl) {
const params = { Bucket: this._bucket, Key: fileKey };
if (this._presignedUrlExpires) {
params.Expires = this._presignedUrlExpires;
}
// Always use the "getObject" operation, and we recommend that you protect the URL
// appropriately: https://docs.aws.amazon.com/AmazonS3/latest/dev/ShareObjectPreSignedURL.html
presignedUrl = this._s3Client.getSignedUrl('getObject', params);
if (!this._baseUrl) {
return presignedUrl;
}
}
if (!this._baseUrl) {
return `https://${this._bucket}.s3.amazonaws.com/${fileKey}`;
}
const baseUrlFileKey = this._baseUrlDirect ? fileName : fileKey;
return buildDirectAccessUrl(this._baseUrl, baseUrlFileKey, presignedUrl, config, filename);
}
handleFileStream(filename, req, res) {
const params = {
Key: this._bucketPrefix + filename,
Range: req.get('Range'),
};
return this.createBucket().then(() => new Promise((resolve, reject) => {
this._s3Client.getObject(params, (error, data) => {
if (error !== null) {
return reject(error);
}
if (data && !data.Body) {
return reject(data);
}
res.writeHead(206, {
'Accept-Ranges': data.AcceptRanges,
'Content-Length': data.ContentLength,
'Content-Range': data.ContentRange,
'Content-Type': data.ContentType,
});
res.write(data.Body);
res.end();
return resolve(data.Body);
});
}));
}
}
module.exports = S3Adapter;
module.exports.default = S3Adapter;