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June 4, 2020 11:01
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This is a demonstration (aka demo) of the setup of jQuery File Upload in a standalone file input. We're *not using* the `UI version` and the default validation was not working for us, so we ditched those and followed community provided raw checkup. Thanks to the StackOverflow thread for guiding to achieve my need: https://stackoverflow.com/q/174…
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| <!-- | |
| jQuery File Upload UI | |
| jQuery File Upload is a huge plugin with a lot of functionalities. | |
| And that made this a bit complex to find out how to implement a | |
| basic upload feature like: | |
| 1. Multiple file upload | |
| 2. Validate on file types | |
| 3. Validate on file size | |
| 4. Validate whether maximum number of files reached or not | |
| 5. Display progress | |
| 6. See the uploaded file before the form submission | |
| 7. Delete uploaded file | |
| This is just a front-end implementation of the plugin to | |
| facilitate the file upload as mentioned above. | |
| LOAD THE FILE FROM LOCALHOST OR ANY HOSTED PLATFORM | |
| PROVIDE THE 3 files in js/ directory | |
| - js/jquery.ui.widget.js | |
| - js/jquery.iframe-transport.js | |
| - js/jquery.fileupload.js | |
| THANKS TO THIS STACKOVERFLOW THREAD: | |
| https://stackoverflow.com/q/17451629/1743124 | |
| --> | |
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <title>Testing jQuery File Upload</title> | |
| <!-- BOOTSTRAP FOR STYLING --> | |
| <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous"> | |
| <!-- IONICONS FOR ICONS --> | |
| <link rel="stylesheet" href="http://code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css"> | |
| <!-- APP STYLES --> | |
| <style type="text/css"> | |
| .uploaded-file { | |
| background: linear-gradient(to right, lightblue 50%, transparent 50%); | |
| background-size: 200% 100%; | |
| background-position: right bottom; | |
| transition: all 1s ease; | |
| } | |
| .uploaded-file.done a { | |
| background-color: lightgreen; | |
| } | |
| .uploaded-file.done .badge { | |
| display: inline-block; | |
| } | |
| </style> | |
| </head> | |
| <body class="p-3"> | |
| <form action="" enctype="multipart/form-data" class="need-validation" novalidate> | |
| <div class="form-group"> | |
| <label for="attachments" class="font-weight-bold d-block">Attachments (optional)</label> | |
| <input type="file" name="attachments" id="attachments" accept=".doc, .docx, .pdf, .rtf, .xls, .xlsx, .odt, .jpg, .jpeg, .jpe, .gif, .png, .bmp, .tiff, .tif"> | |
| <div id="file-upload-status" class="mt-2"></div> <!-- PLACEHOLDER TO DISPLAY UPLOAD PROGRESS --> | |
| <p class="text-info font-italic small"><i class="ion-information-circled mr-1"></i> Maximum 5 attachments allowed. Maximum upload size: 500mb per file. Allowed file types are: jpg, gif, bmp, tiff, png, pdf, docx, doc, xls, xlsx, rtf, odt</p> | |
| </div> | |
| <button class="btn btn-primary" type="submit">Submit</button> | |
| </form> | |
| <!-- JAVASCRIPTS --> | |
| <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script> | |
| <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js"></script> | |
| <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script> | |
| <!-- jQuery File Upload: Standalone --> | |
| <script src="js/jquery.ui.widget.js"></script> | |
| <script src="js/jquery.iframe-transport.js"></script> | |
| <script src="js/jquery.fileupload.js"></script> | |
| <script type="text/javascript"> | |
| jQuery(document).ready(function ($) { | |
| var maximum_num_files = 5; | |
| var maximum_file_size = 500000000; // 500mb in Decimal bytes. | |
| var accepted_file_formats = 'jpg|jpeg|jpe|png|gif|bmp|docx|doc|xls|xlsx|pdf|odt|rtf'; | |
| var accepted_file_regex = new RegExp('(\.|\/)(' + accepted_file_formats + ')$', 'i'); | |
| // ------------------------------------------ | |
| // Attachments | |
| // using jQuery File Upload. | |
| // https://github.com/blueimp/jQuery-File-Upload/ | |
| // | |
| // Known Issue: | |
| // Default validation is not working. | |
| // Worked with https://stackoverflow.com/a/17636961/1743124 | |
| // ------------------------------------------ | |
| var attachment_field = $('#attachments'); | |
| attachment_field.fileupload({ | |
| dataType: 'json', | |
| url: '//jquery-file-upload.appspot.com/', | |
| autoUpload: false, | |
| // Following confirugrations din't work. | |
| // See: https://stackoverflow.com/questions/17451629/maxfilesize-and-acceptfiletypes-in-blueimp-file-upload-plugin-do-not-work-why#comment54025049_20076562) | |
| // | |
| // disableValidation: false, | |
| // limitConcurrentUploads: maximum_num_files, | |
| // limitMultiFileUploads: maximum_num_files, | |
| // maxFileSize: maximum_file_size, | |
| // acceptFileTypes: accepted_file_regex, | |
| add: function (e, data) { | |
| var uploadErrors = []; | |
| // Limit the number of files to be uploaded. | |
| if ($('#file-upload-status .uploaded-file').length >= maximum_num_files) { | |
| uploadErrors.push(`You cannot upload more than ${maximum_num_files} files`); | |
| } | |
| // Limit to specific types only. | |
| if (data.files[0]['type'].length && !accepted_file_regex.test(data.files[0]['type'])) { | |
| uploadErrors.push(`${data.files[0].name} is not an accepted file type`); | |
| } | |
| // Keep within the size limit. | |
| if (data.files[0]['size'].length && data.files[0]['size'] > maximum_file_size) { | |
| uploadErrors.push(`Filesize of ${data.files[0].name} is too big`); | |
| } | |
| if (uploadErrors.length > 0) { | |
| alert(uploadErrors.join("\n")); | |
| } else { | |
| data.context = $('<div class="uploaded-file d-block mb-2 clearfix"></div>') | |
| .append($('<button type="button" class="float-right btn js-delete-file delete" data-type="DELETE" data-url=""><i class="ion-close-circled" aria-hidden="true"></i> <span class="sr-only">Delete ' + data.files[0].name + '</span></button>')) | |
| .append($('<a class="btn btn-block btn-link text-dark text-left" target="_blank" rel="noopener"></a>').text(data.files[0].name).append('<span class="badge badge-success badge-pill ml-2 text-uppercase"><i class="ion-android-checkmark-circle mr-1" aria-hidden="true"></i> Ready</span>')) | |
| .appendTo(document.querySelector('#file-upload-status')); | |
| data.submit(); | |
| } | |
| }, | |
| progress: function (e, data) { | |
| var progress = parseInt((data.loaded / data.total) * 100, 10); | |
| data.context.css('background-position-x', 100 - progress + '%'); | |
| }, | |
| done: function (e, data) { | |
| data.context | |
| .addClass('done') | |
| .find('a') | |
| .prop('href', data.result.files[0].url); | |
| data.context | |
| .find('button') | |
| .attr('data-url', data.result.files[0].url); | |
| } | |
| }); | |
| // Delete the Attachment. | |
| $('body').on('click', '.js-delete-file', function(event) { | |
| if (confirm('Are you sure you want to remove the attachment?')) { | |
| var row = $(this).parent(); | |
| // $.get('/delete-file.php?id=' + row.attr('id'), function (data) { | |
| row.slideUp('slow', function () { | |
| row.remove(); | |
| }); | |
| // }); | |
| return false; | |
| } | |
| }); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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