https://tasz.hu/wp-content/plugins/ninja-forms-uploads/assets/js/lib/jquery.iframe-transport.js?ver=3.3.16

1/*
2 * jQuery Iframe Transport Plugin
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 * https://opensource.org/licenses/MIT
10 */
11
12/* global define, require */
13
14(function (factory) {
15  'use strict';
16  if (typeof define === 'function' && define.amd) {
17    // Register as an anonymous AMD module:
18    define(['jquery'], factory);
19  } else if (typeof exports === 'object') {
20    // Node/CommonJS:
21    factory(require('jquery'));
22  } else {
23    // Browser globals:
24    factory(window.jQuery);
25  }
26})(function ($) {
27  'use strict';
28
29  // Helper variable to create unique names for the transport iframes:
30  var counter = 0,
31    jsonAPI = $,
32    jsonParse = 'parseJSON';
33
34  if ('JSON' in window && 'parse' in JSON) {
35    jsonAPI = JSON;
36    jsonParse = 'parse';
37  }
38
39  // The iframe transport accepts four additional options:
40  // options.fileInput: a jQuery collection of file input fields
41  // options.paramName: the parameter name for the file form data,
42  //  overrides the name property of the file input field(s),
43  //  can be a string or an array of strings.
44  // options.formData: an array of objects with name and value properties,
45  //  equivalent to the return data of .serializeArray(), e.g.:
46  //  [{name: 'a', value: 1}, {name: 'b', value: 2}]
47  // options.initialIframeSrc: the URL of the initial iframe src,
48  //  by default set to "javascript:false;"
49  $.ajaxTransport('iframe', function (options) {
50    if (options.async) {
51      // javascript:false as initial iframe src
52      // prevents warning popups on HTTPS in IE6:
53      // eslint-disable-next-line no-script-url
54      var initialIframeSrc = options.initialIframeSrc || 'javascript:false;',
55        form,
56        iframe,
57        addParamChar;
58      return {
59        send: function (_, completeCallback) {
60          form = $('<form style="display:none;"></form>');
61          form.attr('accept-charset', options.formAcceptCharset);
62          addParamChar = /\?/.test(options.url) ? '&' : '?';
63          // XDomainRequest only supports GET and POST:
64          if (options.type === 'DELETE') {
65            options.url = options.url + addParamChar + '_method=DELETE';
66            options.type = 'POST';
67          } else if (options.type === 'PUT') {
68            options.url = options.url + addParamChar + '_method=PUT';
69            options.type = 'POST';
70          } else if (options.type === 'PATCH') {
71            options.url = options.url + addParamChar + '_method=PATCH';
72            options.type = 'POST';
73          }
74          // IE versions below IE8 cannot set the name property of
75          // elements that have already been added to the DOM,
76          // so we set the name along with the iframe HTML markup:
77          counter += 1;
78          iframe = $(
79            '<iframe src="' +
80              initialIframeSrc +
81              '" name="iframe-transport-' +
82              counter +
83              '"></iframe>'
84          ).on('load', function () {
85            var fileInputClones,
86              paramNames = $.isArray(options.paramName)
87                ? options.paramName
88                : [options.paramName];
89            iframe.off('load').on('load', function () {
90              var response;
91              // Wrap in a try/catch block to catch exceptions thrown
92              // when trying to access cross-domain iframe contents:
93              try {
94                response = iframe.contents();
95                // Google Chrome and Firefox do not throw an
96                // exception when calling iframe.contents() on
97                // cross-domain requests, so we unify the response:
98                if (!response.length || !response[0].firstChild) {
99                  throw new Error();
100                }
101              } catch (e) {
102                response = undefined;
103              }
104              // The complete callback returns the
105              // iframe content document as response object:
106              completeCallback(200, 'success', { iframe: response });
107              // Fix for IE endless progress bar activity bug
108              // (happens on form submits to iframe targets):
109              $('<iframe src="' + initialIframeSrc + '"></iframe>').appendTo(
110                form
111              );
112              window.setTimeout(function () {
113                // Removing the form in a setTimeout call
114                // allows Chrome's developer tools to display
115                // the response result
116                form.remove();
117              }, 0);
118            });
119            form
120              .prop('target', iframe.prop('name'))
121              .prop('action', options.url)
122              .prop('method', options.type);
123            if (options.formData) {
124              $.each(options.formData, function (index, field) {
125                $('<input type="hidden"/>')
126                  .prop('name', field.name)
127                  .val(field.value)
128                  .appendTo(form);
129              });
130            }
131            if (
132              options.fileInput &&
133              options.fileInput.length &&
134              options.type === 'POST'
135            ) {
136              fileInputClones = options.fileInput.clone();
137              // Insert a clone for each file input field:
138              options.fileInput.after(function (index) {
139                return fileInputClones[index];
140              });
141              if (options.paramName) {
142                options.fileInput.each(function (index) {
143                  $(this).prop('name', paramNames[index] || options.paramName);
144                });
145              }
146              // Appending the file input fields to the hidden form
147              // removes them from their original location:
148              form
149                .append(options.fileInput)
150                .prop('enctype', 'multipart/form-data')
151                // enctype must be set as encoding for IE:
152                .prop('encoding', 'multipart/form-data');
153              // Remove the HTML5 form attribute from the input(s):
154              options.fileInput.removeAttr('form');
155            }
156            window.setTimeout(function () {
157              // Submitting the form in a setTimeout call fixes an issue with
158              // Safari 13 not triggering the iframe load event after resetting
159              // the load event handler, see also:
160              // https://github.com/blueimp/jQuery-File-Upload/issues/3633
161              form.submit();
162              // Insert the file input fields at their original location
163              // by replacing the clones with the originals:
164              if (fileInputClones && fileInputClones.length) {
165                options.fileInput.each(function (index, input) {
166                  var clone = $(fileInputClones[index]);
167                  // Restore the original name and form properties:
168                  $(input)
169                    .prop('name', clone.prop('name'))
170                    .attr('form', clone.attr('form'));
171                  clone.replaceWith(input);
172                });
173              }
174            }, 0);
175          });
176          form.append(iframe).appendTo(document.body);
177        },
178        abort: function () {
179          if (iframe) {
180            // javascript:false as iframe src aborts the request
181            // and prevents warning popups on HTTPS in IE6.
182            iframe.off('load').prop('src', initialIframeSrc);
183          }
184          if (form) {
185            form.remove();
186          }
187        }
188      };
189    }
190  });
191
192  // The iframe transport returns the iframe content document as response.
193  // The following adds converters from iframe to text, json, html, xml
194  // and script.
195  // Please note that the Content-Type for JSON responses has to be text/plain
196  // or text/html, if the browser doesn't include application/json in the
197  // Accept header, else IE will show a download dialog.
198  // The Content-Type for XML responses on the other hand has to be always
199  // application/xml or text/xml, so IE properly parses the XML response.
200  // See also
201  // https://github.com/blueimp/jQuery-File-Upload/wiki/Setup#content-type-negotiation
202  $.ajaxSetup({
203    converters: {
204      'iframe text': function (iframe) {
205        return iframe && $(iframe[0].body).text();
206      },
207      'iframe json': function (iframe) {
208        return iframe && jsonAPI[jsonParse]($(iframe[0].body).text());
209      },
210      'iframe html': function (iframe) {
211        return iframe && $(iframe[0].body).html();
212      },
213      'iframe xml': function (iframe) {
214        var xmlDoc = iframe && iframe[0];
215        return xmlDoc && $.isXMLDoc(xmlDoc)
216          ? xmlDoc
217          : $.parseXML(
218              (xmlDoc.XMLDocument && xmlDoc.XMLDocument.xml) ||
219                $(xmlDoc.body).html()
220            );
221      },
222      'iframe script': function (iframe) {
223        return iframe && $.globalEval($(iframe[0].body).text());
224      }
225    }
226  });
227});