80 lines
2.3 KiB
JavaScript
80 lines
2.3 KiB
JavaScript
// S3Adapter
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//
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// Stores Parse files in AWS S3.
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var AWS = require('aws-sdk');
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var path = require('path');
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var DEFAULT_REGION = "us-east-1";
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var DEFAULT_BUCKET = "parse-files";
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// Creates an S3 session.
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// Providing AWS access and secret keys is mandatory
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// Region and bucket will use sane defaults if omitted
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function S3Adapter(accessKey, secretKey, options) {
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options = options || {};
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this.region = options.region || DEFAULT_REGION;
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this.bucket = options.bucket || DEFAULT_BUCKET;
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this.bucketPrefix = options.bucketPrefix || "";
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this.directAccess = options.directAccess || false;
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s3Options = {
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accessKeyId: accessKey,
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secretAccessKey: secretKey,
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params: {Bucket: this.bucket}
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};
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AWS.config.region = this.region;
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this.s3 = new AWS.S3(s3Options);
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}
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// For a given config object, filename, and data, store a file in S3
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// Returns a promise containing the S3 object creation response
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S3Adapter.prototype.create = function(config, filename, data) {
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var self = this;
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var params = {
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Key: self.bucketPrefix + filename,
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Body: data,
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};
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if (self.directAccess) {
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params.ACL = "public-read"
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}
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return new Promise(function(resolve, reject) {
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self.s3.upload(params, function(err, data) {
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if (err !== null) return reject(err);
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resolve(data);
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});
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});
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}
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// Search for and return a file if found by filename
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// Returns a promise that succeeds with the buffer result from S3
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S3Adapter.prototype.get = function(config, filename) {
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var self = this;
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var params = {Key: self.bucketPrefix + filename};
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return new Promise(function(resolve, reject) {
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self.s3.getObject(params, function(err, data) {
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if (err !== null) return reject(err);
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resolve(data.Body);
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});
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});
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}
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// Generates and returns the location of a file stored in S3 for the given request and
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// filename
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// The location is the direct S3 link if the option is set, otherwise we serve
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// the file through parse-server
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S3Adapter.prototype.location = function(config, req, filename) {
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if (this.directAccess) {
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return ('https://' + this.bucket + '.s3.amazonaws.com' + '/' +
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this.bucketPrefix + filename);
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}
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return (req.protocol + '://' + req.get('host') +
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path.dirname(req.originalUrl) + '/' + req.config.applicationId +
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'/' + encodeURIComponent(filename));
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}
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module.exports = S3Adapter;
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