1/* 2 * jQuery Iframe Transport Plugin 1.4 3 * https://github.com/blueimp/jQuery-File-Upload 4 * 5 * Copyright 2011, Sebastian Tschan 6 * https://blueimp.net 7 * 8 * Licensed under the MIT license: 9 * http://www.opensource.org/licenses/MIT 10 */ 11 12/*jslint unparam: true, nomen: true */ 13/*global define, window, document */ 14 15(function (factory) { 16 'use strict'; 17 if (typeof define === 'function' && define.amd) { 18 // Register as an anonymous AMD module: 19 define(['jquery'], factory); 20 } else { 21 // Browser globals: 22 factory(window.jQuery); 23 } 24}(function ($) { 25 'use strict'; 26 27 // Helper variable to create unique names for the transport iframes: 28 var counter = 0; 29 30 // The iframe transport accepts three additional options: 31 // options.fileInput: a jQuery collection of file input fields 32 // options.paramName: the parameter name for the file form data, 33 // overrides the name property of the file input field(s), 34 // can be a string or an array of strings. 35 // options.formData: an array of objects with name and value properties, 36 // equivalent to the return data of .serializeArray(), e.g.: 37 // [{name: 'a', value: 1}, {name: 'b', value: 2}] 38 $.ajaxTransport('iframe', function (options) { 39 if (options.async && (options.type === 'POST' || options.type === 'GET')) { 40 var form, 41 iframe; 42 return { 43 send: function (_, completeCallback) { 44 form = $('<form style="display:none;"></form>'); 45 // javascript:false as initial iframe src 46 // prevents warning popups on HTTPS in IE6. 47 // IE versions below IE8 cannot set the name property of 48 // elements that have already been added to the DOM, 49 // so we set the name along with the iframe HTML markup: 50 iframe = $( 51 '<iframe src="javascript:false;" name="iframe-transport-' + 52 (counter += 1) + '"></iframe>' 53 ).bind('load', function () { 54 var fileInputClones, 55 paramNames = $.isArray(options.paramName) ? 56 options.paramName : [options.paramName]; 57 iframe 58 .unbind('load') 59 .bind('load', function () { 60 var response; 61 // Wrap in a try/catch block to catch exceptions thrown 62 // when trying to access cross-domain iframe contents: 63 try { 64 response = iframe.contents(); 65 // Google Chrome and Firefox do not throw an 66 // exception when calling iframe.contents() on 67 // cross-domain requests, so we unify the response: 68 if (!response.length || !response[0].firstChild) { 69 throw new Error(); 70 } 71 } catch (e) { 72 response = undefined; 73 } 74 // The complete callback returns the 75 // iframe content document as response object: 76 completeCallback( 77 200, 78 'success', 79 {'iframe': response} 80 ); 81 // Fix for IE endless progress bar activity bug 82 // (happens on form submits to iframe targets): 83 $('<iframe src="javascript:false;"></iframe>') 84 .appendTo(form); 85 form.remove(); 86 }); 87 form 88 .prop('target', iframe.prop('name')) 89 .prop('action', options.url) 90 .prop('method', options.type); 91 if (options.formData) { 92 $.each(options.formData, function (index, field) { 93 $('<input type="hidden"/>') 94 .prop('name', field.name) 95 .val(field.value) 96 .appendTo(form); 97 }); 98 } 99 if (options.fileInput && options.fileInput.length && 100 options.type === 'POST') { 101 fileInputClones = options.fileInput.clone(); 102 // Insert a clone for each file input field: 103 options.fileInput.after(function (index) { 104 return fileInputClones[index]; 105 }); 106 if (options.paramName) { 107 options.fileInput.each(function (index) { 108 $(this).prop( 109 'name', 110 paramNames[index] || options.paramName 111 ); 112 }); 113 } 114 // Appending the file input fields to the hidden form 115 // removes them from their original location: 116 form 117 .append(options.fileInput) 118 .prop('enctype', 'multipart/form-data') 119 // enctype must be set as encoding for IE: 120 .prop('encoding', 'multipart/form-data'); 121 } 122 form.submit(); 123 // Insert the file input fields at their original location 124 // by replacing the clones with the originals: 125 if (fileInputClones && fileInputClones.length) { 126 options.fileInput.each(function (index, input) { 127 var clone = $(fileInputClones[index]); 128 $(input).prop('name', clone.prop('name')); 129 clone.replaceWith(input); 130 }); 131 } 132 }); 133 form.append(iframe).appendTo(document.body); 134 }, 135 abort: function () { 136 if (iframe) { 137 // javascript:false as iframe src aborts the request 138 // and prevents warning popups on HTTPS in IE6. 139 // concat is used to avoid the "Script URL" JSLint error: 140 iframe 141 .unbind('load') 142 .prop('src', 'javascript'.concat(':false;')); 143 } 144 if (form) { 145 form.remove(); 146 } 147 } 148 }; 149 } 150 }); 151 152 // The iframe transport returns the iframe content document as response. 153 // The following adds converters from iframe to text, json, html, and script: 154 $.ajaxSetup({ 155 converters: { 156 'iframe text': function (iframe) { 157 return $(iframe[0].body).text(); 158 }, 159 'iframe json': function (iframe) { 160 return $.parseJSON($(iframe[0].body).text()); 161 }, 162 'iframe html': function (iframe) { 163 return $(iframe[0].body).html(); 164 }, 165 'iframe script': function (iframe) { 166 return $.globalEval($(iframe[0].body).text()); 167 } 168 } 169 }); 170 171}));
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