Subversion-Projekte lars-tiefland.webanos.faltradxxs.de

/*

 * jQuery Iframe Transport Plugin

 * https://github.com/blueimp/jQuery-File-Upload

 *

 * Copyright 2011, Sebastian Tschan

 * https://blueimp.net

 *

 * Licensed under the MIT license:

 * https://opensource.org/licenses/MIT

 */

/* global define, require */

(function (factory) {

  'use strict';

  if (typeof define === 'function' && define.amd) {

    // Register as an anonymous AMD module:

    define(['jquery'], factory);

  } else if (typeof exports === 'object') {

    // Node/CommonJS:

    factory(require('jquery'));

  } else {

    // Browser globals:

    factory(window.jQuery);

  }

})(function ($) {

  'use strict';

  // Helper variable to create unique names for the transport iframes:

  var counter = 0,

    jsonAPI = $,

    jsonParse = 'parseJSON';

  if ('JSON' in window && 'parse' in JSON) {

    jsonAPI = JSON;

    jsonParse = 'parse';

  }

  // The iframe transport accepts four additional options:

  // options.fileInput: a jQuery collection of file input fields

  // options.paramName: the parameter name for the file form data,

  //  overrides the name property of the file input field(s),

  //  can be a string or an array of strings.

  // options.formData: an array of objects with name and value properties,

  //  equivalent to the return data of .serializeArray(), e.g.:

  //  [{name: 'a', value: 1}, {name: 'b', value: 2}]

  // options.initialIframeSrc: the URL of the initial iframe src,

  //  by default set to "javascript:false;"

  $.ajaxTransport('iframe', function (options) {

    if (options.async) {

      // javascript:false as initial iframe src

      // prevents warning popups on HTTPS in IE6:

      // eslint-disable-next-line no-script-url

      var initialIframeSrc = options.initialIframeSrc || 'javascript:false;',

        form,

        iframe,

        addParamChar;

      return {

        send: function (_, completeCallback) {

          form = $('<form style="display:none;"></form>');

          form.attr('accept-charset', options.formAcceptCharset);

          addParamChar = /\?/.test(options.url) ? '&' : '?';

          // XDomainRequest only supports GET and POST:

          if (options.type === 'DELETE') {

            options.url = options.url + addParamChar + '_method=DELETE';

            options.type = 'POST';

          } else if (options.type === 'PUT') {

            options.url = options.url + addParamChar + '_method=PUT';

            options.type = 'POST';

          } else if (options.type === 'PATCH') {

            options.url = options.url + addParamChar + '_method=PATCH';

            options.type = 'POST';

          }

          // IE versions below IE8 cannot set the name property of

          // elements that have already been added to the DOM,

          // so we set the name along with the iframe HTML markup:

          counter += 1;

          iframe = $(

            '<iframe src="' +

              initialIframeSrc +

              '" name="iframe-transport-' +

              counter +

              '"></iframe>'

          ).on('load', function () {

            var fileInputClones,

              paramNames = $.isArray(options.paramName)

                ? options.paramName

                : [options.paramName];

            iframe.off('load').on('load', function () {

              var response;

              // Wrap in a try/catch block to catch exceptions thrown

              // when trying to access cross-domain iframe contents:

              try {

                response = iframe.contents();

                // Google Chrome and Firefox do not throw an

                // exception when calling iframe.contents() on

                // cross-domain requests, so we unify the response:

                if (!response.length || !response[0].firstChild) {

                  throw new Error();

                }

              } catch (e) {

                response = undefined;

              }

              // The complete callback returns the

              // iframe content document as response object:

              completeCallback(200, 'success', { iframe: response });

              // Fix for IE endless progress bar activity bug

              // (happens on form submits to iframe targets):

              $('<iframe src="' + initialIframeSrc + '"></iframe>').appendTo(

                form

              );

              window.setTimeout(function () {

                // Removing the form in a setTimeout call

                // allows Chrome's developer tools to display

                // the response result

                form.remove();

              }, 0);

            });

            form

              .prop('target', iframe.prop('name'))

              .prop('action', options.url)

              .prop('method', options.type);

            if (options.formData) {

              $.each(options.formData, function (index, field) {

                $('<input type="hidden"/>')

                  .prop('name', field.name)

                  .val(field.value)

                  .appendTo(form);

              });

            }

            if (

              options.fileInput &&

              options.fileInput.length &&

              options.type === 'POST'

            ) {

              fileInputClones = options.fileInput.clone();

              // Insert a clone for each file input field:

              options.fileInput.after(function (index) {

                return fileInputClones[index];

              });

              if (options.paramName) {

                options.fileInput.each(function (index) {

                  $(this).prop('name', paramNames[index] || options.paramName);

                });

              }

              // Appending the file input fields to the hidden form

              // removes them from their original location:

              form

                .append(options.fileInput)

                .prop('enctype', 'multipart/form-data')

                // enctype must be set as encoding for IE:

                .prop('encoding', 'multipart/form-data');

              // Remove the HTML5 form attribute from the input(s):

              options.fileInput.removeAttr('form');

            }

            window.setTimeout(function () {

              // Submitting the form in a setTimeout call fixes an issue with

              // Safari 13 not triggering the iframe load event after resetting

              // the load event handler, see also:

              // https://github.com/blueimp/jQuery-File-Upload/issues/3633

              form.submit();

              // Insert the file input fields at their original location

              // by replacing the clones with the originals:

              if (fileInputClones && fileInputClones.length) {

                options.fileInput.each(function (index, input) {

                  var clone = $(fileInputClones[index]);

                  // Restore the original name and form properties:

                  $(input)

                    .prop('name', clone.prop('name'))

                    .attr('form', clone.attr('form'));

                  clone.replaceWith(input);

                });

              }

            }, 0);

          });

          form.append(iframe).appendTo(document.body);

        },

        abort: function () {

          if (iframe) {

            // javascript:false as iframe src aborts the request

            // and prevents warning popups on HTTPS in IE6.

            iframe.off('load').prop('src', initialIframeSrc);

          }

          if (form) {

            form.remove();

          }

        }

      };

    }

  });

  // The iframe transport returns the iframe content document as response.

  // The following adds converters from iframe to text, json, html, xml

  // and script.

  // Please note that the Content-Type for JSON responses has to be text/plain

  // or text/html, if the browser doesn't include application/json in the

  // Accept header, else IE will show a download dialog.

  // The Content-Type for XML responses on the other hand has to be always

  // application/xml or text/xml, so IE properly parses the XML response.

  // See also

  // https://github.com/blueimp/jQuery-File-Upload/wiki/Setup#content-type-negotiation

  $.ajaxSetup({

    converters: {

      'iframe text': function (iframe) {

        return iframe && $(iframe[0].body).text();

      },

      'iframe json': function (iframe) {

        return iframe && jsonAPI[jsonParse]($(iframe[0].body).text());

      },

      'iframe html': function (iframe) {

        return iframe && $(iframe[0].body).html();

      },

      'iframe xml': function (iframe) {

        var xmlDoc = iframe && iframe[0];

        return xmlDoc && $.isXMLDoc(xmlDoc)

          ? xmlDoc

          : $.parseXML(

              (xmlDoc.XMLDocument && xmlDoc.XMLDocument.xml) ||

                $(xmlDoc.body).html()

            );

      },

      'iframe script': function (iframe) {

        return iframe && $.globalEval($(iframe[0].body).text());

      }

    }

  });

});