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s3_PhotoViewer.js

s3_PhotoViewer.js demonstrates how to allow viewing of photos in albums stored in an Amazon S3 bucket.

/** * Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * * This file is licensed under the Apache License, Version 2.0 (the "License"). * You may not use this file except in compliance with the License. A copy of * the License is located at * * http://aws.amazon.com/apache2.0/ * * This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR * CONDITIONS OF ANY KIND, either express or implied. See the License for the * specific language governing permissions and limitations under the License. * */ // ABOUT THIS JAVASCRIPT SAMPLE: This sample is part of the SDK for JavaScript Developer Guide topic at // https://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/s3-example-photos-view.html // // Data constructs and initialization. // // **DO THIS**: // Replace BUCKET_NAME with the bucket name. // var albumBucketName = 'BUCKET_NAME'; // **DO THIS**: // Replace this block of code with the sample code located at: // Cognito -- Manage Identity Pools -- [identity_pool_name] -- Sample Code -- JavaScript // // Initialize the Amazon Cognito credentials provider AWS.config.region = 'REGION'; // Region AWS.config.credentials = new AWS.CognitoIdentityCredentials({ IdentityPoolId: 'IDENTITY_POOL_ID', }); // Create a new service object var s3 = new AWS.S3({ apiVersion: '2006-03-01', params: {Bucket: albumBucketName} }); // A utility function to create HTML. function getHtml(template) { return template.join('\n'); } // // Functions // // List the photo albums that exist in the bucket. function listAlbums() { s3.listObjects({Delimiter: '/'}, function(err, data) { if (err) { return alert('There was an error listing your albums: ' + err.message); } else { var albums = data.CommonPrefixes.map(function(commonPrefix) { var prefix = commonPrefix.Prefix; var albumName = decodeURIComponent(prefix.replace('/', '')); return getHtml([ '<li>', '<button style="margin:5px;" onclick="viewAlbum(\'' + albumName + '\')">', albumName, '</button>', '</li>' ]); }); var message = albums.length ? getHtml([ '<p>Click on an album name to view it.</p>', ]) : '<p>You do not have any albums. Please Create album.'; var htmlTemplate = [ '<h2>Albums</h2>', message, '<ul>', getHtml(albums), '</ul>', ] document.getElementById('viewer').innerHTML = getHtml(htmlTemplate); } }); } // Show the photos that exist in an album. function viewAlbum(albumName) { var albumPhotosKey = encodeURIComponent(albumName) + '/_'; s3.listObjects({Prefix: albumPhotosKey}, function(err, data) { if (err) { return alert('There was an error viewing your album: ' + err.message); } // 'this' references the AWS.Response instance that represents the response var href = this.request.httpRequest.endpoint.href; var bucketUrl = href + albumBucketName + '/'; var photos = data.Contents.map(function(photo) { var photoKey = photo.Key; var photoUrl = bucketUrl + encodeURIComponent(photoKey); return getHtml([ '<span>', '<div>', '<br/>', '<img style="width:128px;height:128px;" src="' + photoUrl + '"/>', '</div>', '<div>', '<span>', photoKey.replace(albumPhotosKey, ''), '</span>', '</div>', '</span>', ]); }); var message = photos.length ? '<p>The following photos are present.</p>' : '<p>There are no photos in this album.</p>'; var htmlTemplate = [ '<div>', '<button onclick="listAlbums()">', 'Back To Albums', '</button>', '</div>', '<h2>', 'Album: ' + albumName, '</h2>', message, '<div>', getHtml(photos), '</div>', '<h2>', 'End of Album: ' + albumName, '</h2>', '<div>', '<button onclick="listAlbums()">', 'Back To Albums', '</button>', '</div>', ] document.getElementById('viewer').innerHTML = getHtml(htmlTemplate); }); }

Sample Details

Service: s3

Last tested: 2019-05-07

Author: AWS-JSDG

Type: full-example

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