调整文件结构，为全面优化javascript代码做准备

OpenAuth.Mvc/Content/BJUI/other/jquery.iframe-transport.js

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+// This [jQuery](https://jquery.com/) plugin implements an `<iframe>`
+// [transport](https://api.jquery.com/jQuery.ajax/#extending-ajax) so that
+// `$.ajax()` calls support the uploading of files using standard HTML file
+// input fields. This is done by switching the exchange from `XMLHttpRequest`
+// to a hidden `iframe` element containing a form that is submitted.
+
+// The [source for the plugin](https://github.com/cmlenz/jquery-iframe-transport)
+// is available on [Github](https://github.com/) and licensed under the [MIT
+// license](https://github.com/cmlenz/jquery-iframe-transport/blob/master/LICENSE).
+
+// ## Usage
+
+// To use this plugin, you simply add an `iframe` option with the value `true`
+// to the Ajax settings an `$.ajax()` call, and specify the file fields to
+// include in the submssion using the `files` option, which can be a selector,
+// jQuery object, or a list of DOM elements containing one or more
+// `<input type="file">` elements:
+
+//     $("#myform").submit(function() {
+//         $.ajax(this.action, {
+//             files: $(":file", this),
+//             iframe: true
+//         }).complete(function(data) {
+//             console.log(data);
+//         });
+//     });
+
+// The plugin will construct hidden `<iframe>` and `<form>` elements, add the
+// file field(s) to that form, submit the form, and process the response.
+
+// If you want to include other form fields in the form submission, include
+// them in the `data` option, and set the `processData` option to `false`:
+
+//     $("#myform").submit(function() {
+//         $.ajax(this.action, {
+//             data: $(":text", this).serializeArray(),
+//             files: $(":file", this),
+//             iframe: true,
+//             processData: false
+//         }).complete(function(data) {
+//             console.log(data);
+//         });
+//     });
+
+// ### Response Data Types
+
+// As the transport does not have access to the HTTP headers of the server
+// response, it is not as simple to make use of the automatic content type
+// detection provided by jQuery as with regular XHR. If you can't set the
+// expected response data type (for example because it may vary depending on
+// the outcome of processing by the server), you will need to employ a
+// workaround on the server side: Send back an HTML document containing just a
+// `<textarea>` element with a `data-type` attribute that specifies the MIME
+// type, and put the actual payload in the textarea:
+
+//     <textarea data-type="application/json">
+//       {"ok": true, "message": "Thanks so much"}
+//     </textarea>
+
+// The iframe transport plugin will detect this and pass the value of the
+// `data-type` attribute on to jQuery as if it was the "Content-Type" response
+// header, thereby enabling the same kind of conversions that jQuery applies
+// to regular responses. For the example above you should get a Javascript
+// object as the `data` parameter of the `complete` callback, with the
+// properties `ok: true` and `message: "Thanks so much"`.
+
+// ### Handling Server Errors
+
+// Another problem with using an `iframe` for file uploads is that it is
+// impossible for the javascript code to determine the HTTP status code of the
+// servers response. Effectively, all of the calls you make will look like they
+// are getting successful responses, and thus invoke the `done()` or
+// `complete()` callbacks. You can only communicate problems using the content
+// of the response payload. For example, consider using a JSON response such as
+// the following to indicate a problem with an uploaded file:
+
+//     <textarea data-type="application/json">
+//       {"ok": false, "message": "Please only upload reasonably sized files."}
+//     </textarea>
+
+// ### Compatibility
+
+// This plugin has primarily been tested on Safari 5 (or later), Firefox 4 (or
+// later), and Internet Explorer (all the way back to version 6). While I
+// haven't found any issues with it so far, I'm fairly sure it still doesn't
+// work around all the quirks in all different browsers. But the code is still
+// pretty simple overall, so you should be able to fix it and contribute a
+// patch :)
+
+// ## Annotated Source
+
+(function($, undefined) {
+  "use strict";
+
+  // Register a prefilter that checks whether the `iframe` option is set, and
+  // switches to the "iframe" data type if it is `true`.
+  $.ajaxPrefilter(function(options, origOptions, jqXHR) {
+    if (options.iframe) {
+      options.originalURL = options.url;
+      return "iframe";
+    }
+  });
+
+  // Register a transport for the "iframe" data type. It will only activate
+  // when the "files" option has been set to a non-empty list of enabled file
+  // inputs.
+  $.ajaxTransport("iframe", function(options, origOptions, jqXHR) {
+    var form = null,
+        iframe = null,
+        name = "iframe-" + $.now(),
+        files = $(options.files).filter(":file:enabled"),
+        markers = null,
+        accepts = null;
+
+    // This function gets called after a successful submission or an abortion
+    // and should revert all changes made to the page to enable the
+    // submission via this transport.
+    function cleanUp() {
+      files.each(function(i, file) {
+        var $file = $(file);
+        $file.data("clone").replaceWith($file);
+      });
+      form.remove();
+      iframe.one("load", function() { iframe.remove(); });
+      iframe.attr("src", "javascript:false;");
+    }
+
+    // Remove "iframe" from the data types list so that further processing is
+    // based on the content type returned by the server, without attempting an
+    // (unsupported) conversion from "iframe" to the actual type.
+    options.dataTypes.shift();
+
+    // Use the data from the original AJAX options, as it doesn't seem to be 
+    // copied over since jQuery 1.7.
+    // See https://github.com/cmlenz/jquery-iframe-transport/issues/6
+    options.data = origOptions.data;
+
+    if (files.length) {
+      form = $("<form enctype='multipart/form-data' method='post'></form>").
+        hide().attr({action: options.originalURL, target: name});
+
+      // If there is any additional data specified via the `data` option,
+      // we add it as hidden fields to the form. This (currently) requires
+      // the `processData` option to be set to false so that the data doesn't
+      // get serialized to a string.
+      if (typeof(options.data) === "string" && options.data.length > 0) {
+        $.error("data must not be serialized");
+      }
+      $.each(options.data || {}, function(name, value) {
+        if ($.isPlainObject(value)) {
+          name = value.name;
+          value = value.value;
+        }
+        $("<input type='hidden' />").attr({name:  name, value: value}).
+          appendTo(form);
+      });
+
+      // Add a hidden `X-Requested-With` field with the value `IFrame` to the
+      // field, to help server-side code to determine that the upload happened
+      // through this transport.
+      $("<input type='hidden' value='IFrame' name='X-Requested-With' />").
+        appendTo(form);
+
+      // Borrowed straight from the JQuery source.
+      // Provides a way of specifying the accepted data type similar to the
+      // HTTP "Accept" header
+      if (options.dataTypes[0] && options.accepts[options.dataTypes[0]]) {
+        accepts = options.accepts[options.dataTypes[0]] +
+                  (options.dataTypes[0] !== "*" ? ", */*; q=0.01" : "");
+      } else {
+        accepts = options.accepts["*"];
+      }
+      $("<input type='hidden' name='X-HTTP-Accept'>").
+        attr("value", accepts).appendTo(form);
+
+      // Move the file fields into the hidden form, but first remember their
+      // original locations in the document by replacing them with disabled
+      // clones. This should also avoid introducing unwanted changes to the
+      // page layout during submission.
+      markers = files.after(function(idx) {
+        var $this = $(this),
+            $clone = $this.clone().prop("disabled", true);
+        $this.data("clone", $clone);
+        return $clone;
+      }).next();
+      files.appendTo(form);
+
+      return {
+
+        // The `send` function is called by jQuery when the request should be
+        // sent.
+        send: function(headers, completeCallback) {
+          iframe = $("<iframe src='javascript:false;' name='" + name +
+            "' id='" + name + "' style='display:none'></iframe>");
+
+          // The first load event gets fired after the iframe has been injected
+          // into the DOM, and is used to prepare the actual submission.
+          iframe.one("load", function() {
+
+            // The second load event gets fired when the response to the form
+            // submission is received. The implementation detects whether the
+            // actual payload is embedded in a `<textarea>` element, and
+            // prepares the required conversions to be made in that case.
+            iframe.one("load", function() {
+              var doc = this.contentWindow ? this.contentWindow.document :
+                (this.contentDocument ? this.contentDocument : this.document),
+                root = doc.documentElement ? doc.documentElement : doc.body,
+                textarea = root.getElementsByTagName("textarea")[0],
+                type = textarea && textarea.getAttribute("data-type") || null,
+                status = textarea && textarea.getAttribute("data-status") || 200,
+                statusText = textarea && textarea.getAttribute("data-statusText") || "OK",
+                content = {
+                  html: root.innerHTML,
+                  text: type ?
+                    textarea.value :
+                    root ? (root.textContent || root.innerText) : null
+                };
+              cleanUp();
+              completeCallback(status, statusText, content, type ?
+                ("Content-Type: " + type) :
+                null);
+            });
+
+            // Now that the load handler has been set up, submit the form.
+            form[0].submit();
+          });
+
+          // After everything has been set up correctly, the form and iframe
+          // get injected into the DOM so that the submission can be
+          // initiated.
+          $("body").append(form, iframe);
+        },
+
+        // The `abort` function is called by jQuery when the request should be
+        // aborted.
+        abort: function() {
+          if (iframe !== null) {
+            iframe.unbind("load").attr("src", "javascript:false;");
+            cleanUp();
+          }
+        }
+
+      };
+    }
+  });
+
+})(jQuery);