Created
November 5, 2017 14:46
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The slimmest app possible for uploading files to S3 using Shrine gem
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| require 'roda' | |
| require 'shrine' | |
| require 'shrine/storage/s3' | |
| S3_OPTIONS = { | |
| access_key_id: ENV.fetch('AWS_ACCESS_KEY_ID'), | |
| secret_access_key: ENV.fetch('AWS_SECRET_ACCESS_KEY'), | |
| region: ENV.fetch('AWS_REGION'), | |
| bucket: ENV.fetch('AWS_BUCKET') | |
| }.freeze | |
| Shrine.storages = { | |
| cache: Shrine::Storage::S3.new( | |
| prefix: 'cache', upload_options: { acl: 'private' }, **S3_OPTIONS | |
| ), | |
| store: Shrine::Storage::S3.new( | |
| prefix: 'store', upload_options: { acl: 'public-read' }, **S3_OPTIONS | |
| ) | |
| } | |
| Shrine.plugin :presign_endpoint | |
| # :nodoc: | |
| # rubocop:disable BlockLength | |
| class App < Roda | |
| plugin :public | |
| route do |r| | |
| r.public # serve static assets | |
| r.root do | |
| <<-'HEREDOC' | |
| <html> | |
| <head> | |
| <link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-beta.2/css/bootstrap.min.css" rel="stylesheet"></link> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/blueimp-file-upload/9.19.1/js/vendor/jquery.ui.widget.min.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/blueimp-file-upload/9.19.1/js/jquery.fileupload.min.js"></script> | |
| <script> | |
| $(function() { | |
| $('[type=file]').fileupload({ | |
| add: function(e, data) { | |
| data.progressBar = $( | |
| '<div class="progress" style="width: 300px"><div class="progress-bar"></div></div>' | |
| ).insertAfter(".form-group"); | |
| var options = { filename: data.files[0].name.match(/[^\/\\]+$/)[0] }; | |
| $.getJSON('/presign', options, function(result) { | |
| data.formData = result['fields']; | |
| data.url = result['url']; | |
| data.paramName = 'file'; | |
| data.submit(); | |
| }); | |
| }, | |
| progress: function(e, data) { | |
| var progress = parseInt(data.loaded / data.total * 100, 10); | |
| var percentage = progress.toString() + '%'; | |
| data.progressBar.find(".progress-bar") | |
| .css("width", percentage).html(percentage); | |
| }, | |
| done: function(e, data) { | |
| // data.progressBar.remove(); | |
| var file = { | |
| // we have to remove the prefix part | |
| id: data.formData.key.match(/^cache\/(.+)/)[1], | |
| storage: 'cache', | |
| metadata: { | |
| size: data.files[0].size, | |
| // IE returns full path | |
| filename: data.files[0].name.match(/[^\/\\]+$/)[0], | |
| mime_type: data.files[0].type | |
| } | |
| } | |
| $('#hidden_file').val(JSON.stringify(file)) | |
| $('<br><p>Done!</p>').insertAfter('.progress') | |
| } | |
| }); | |
| }); | |
| </script> | |
| </head> | |
| <body> | |
| <div class="container"> | |
| <div class="form-group"> | |
| <form method="post" enctype="multipart/form-data"> | |
| <input id="hidden_file" type="hidden" name="file"> | |
| <input id="file" type="file" name="file"> | |
| <input type="submit"> | |
| </form> | |
| </div> | |
| </div> | |
| </body> | |
| </html> | |
| HEREDOC | |
| end | |
| r.post '' do | |
| "The file #{r.params['file']} has been uploaded." | |
| end | |
| r.is 'presign' do | |
| r.run Shrine.presign_endpoint(:cache) | |
| end | |
| end | |
| end | |
| run App.freeze.app |
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