lib/s3-handler.js

// Copyright (c) 2018, Compiler Explorer Authors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
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//     * Redistributions of source code must retain the above copyright notice,
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//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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const AWS = require('aws-sdk');

const NoSuchKey = 'NoSuchKey';

class S3Bucket {
    constructor(bucket, region) {
        this.instance = new AWS.S3({region});
        this.bucket = bucket;
        this.region = region;
    }

    async get(key, path) {
        try {
            const result = await this.instance.getObject({Bucket: this.bucket, Key: `${path}/${key}`}).promise();
            return {hit: true, data: result.Body};
        } catch (x) {
            if (x.code === NoSuchKey) return {hit: false};
            throw x;
        }
    }

    async delete(key, path) {
        try {
            await this.instance.deleteObject({Bucket: this.bucket, Key: `${path}/${key}`}).promise();
        } catch (x) {
            if (x.code === NoSuchKey) return false;
            throw x;
        }
    }

    async put(key, value, path, options) {
        return this.instance.putObject({
            Bucket: this.bucket,
            Key: `${path}/${key}`,
            Body: value,
            StorageClass: options.redundancy || "STANDARD",
            Metadata: options.metadata || {}
        }).promise();
    }
}

module.exports = S3Bucket;