https://www.chemicalbook.com/Themes/plugin/ajaxfileupload.js

1
2jQuery.extend({
3
4
5    createUploadIframe: function (id, uri) {
6        //create frame
7        var frameId = 'jUploadFrame' + id;
8        var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId + '" style="position:absolute; top:-9999px; left:-9999px"';
9        if (window.ActiveXObject) {
10            if (typeof uri == 'boolean') {
11                iframeHtml += ' src="' + 'javascript:false' + '"';
12
13            }
14            else if (typeof uri == 'string') {
15                iframeHtml += ' src="' + uri + '"';
16
17            }
18        }
19        iframeHtml += ' />';
20        jQuery(iframeHtml).appendTo(document.body);
21
22        return jQuery('#' + frameId).get(0);
23    },
24    createUploadForm: function (id, fileElementId, data) {
25        //create form	
26        var formId = 'jUploadForm' + id;
27        var fileId = 'jUploadFile' + id;
28        var form = jQuery('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
29        if (data) {
30            for (var i in data) {
31                jQuery('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').appendTo(form);
32            }
33        }
34        var oldElement = jQuery('#' + fileElementId);
35        var newElement = jQuery(oldElement).clone();
36        jQuery(oldElement).attr('id', fileId);
37        jQuery(oldElement).before(newElement);
38        jQuery(oldElement).appendTo(form);
39
40
41
42        //set attributes
43        jQuery(form).css('position', 'absolute');
44        jQuery(form).css('top', '-1200px');
45        jQuery(form).css('left', '-1200px');
46        jQuery(form).appendTo('body');
47        return form;
48    },
49
50    ajaxFileUpload: function (s) {
51        // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout		
52        s = jQuery.extend({}, jQuery.ajaxSettings, s);
53        var id = new Date().getTime()
54        var form = jQuery.createUploadForm(id, s.fileElementId, (typeof (s.data) == 'undefined' ? false : s.data));
55        var io = jQuery.createUploadIframe(id, s.secureuri);
56        var frameId = 'jUploadFrame' + id;
57        var formId = 'jUploadForm' + id;
58        // Watch for a new set of requests
59        if (s.global && !jQuery.active++) {
60            jQuery.event.trigger("ajaxStart");
61        }
62        var requestDone = false;
63        // Create the request object
64        var xml = {}
65        if (s.global)
66            jQuery.event.trigger("ajaxSend", [xml, s]);
67        // Wait for a response to come back
68        var uploadCallback = function (isTimeout) {
69            var io = document.getElementById(frameId);
70            try {
71                if (io.contentWindow) {
72                    xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null;
73                    xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;
74
75                } else if (io.contentDocument) {
76                    xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null;
77                    xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document;
78                }
79            } catch (e) {
80                jQuery.handleError(s, xml, null, e);
81            }
82            if (xml || isTimeout == "timeout") {
83                requestDone = true;
84                var status;
85                try {
86                    status = isTimeout != "timeout" ? "success" : "error";
87                    // Make sure that the request was successful or notmodified
88                    if (status != "error") {
89                        // process the data (runs the xml through httpData regardless of callback)
90                        var data = jQuery.uploadHttpData(xml, s.dataType);
91                        // If a local callback was specified, fire it and pass it the data
92
93                        if (s.success)
94                            s.success(data, status);
95
96
97
98                        // Fire the global callback
99                        if (s.global)
100                            jQuery.event.trigger("ajaxSuccess", [xml, s]);
101                    } else
102                        jQuery.handleError(s, xml, status);
103                } catch (e) {
104                    status = "error";
105                    jQuery.handleError(s, xml, status, e);
106                }
107
108                // The request was completed
109                if (s.global)
110                    jQuery.event.trigger("ajaxComplete", [xml, s]);
111
112                // Handle the global AJAX counter

113                if (s.global && ! --jQuery.active)
114                    jQuery.event.trigger("ajaxStop");
115
116                // Process result
117                if (s.complete)
118                    s.complete(xml, status);
119
120                jQuery(io).unbind()
121
122                setTimeout(function () {
123                    try {
124                        jQuery(io).remove();
125                        jQuery(form).remove();
126
127                    } catch (e) {
128                        jQuery.handleError(s, xml, null, e);
129                    }
130
131                }, 100)
132
133                xml = null
134
135            }
136        }
137        // Timeout checker
138        if (s.timeout > 0) {
139            setTimeout(function () {
140                // Check to see if the request is still happening
141                if (!requestDone) uploadCallback("timeout");
142            }, s.timeout);
143        }
144        try {
145
146            var form = jQuery('#' + formId);
147            jQuery(form).attr('action', s.url);
148            jQuery(form).attr('method', 'POST');
149            jQuery(form).attr('target', frameId);
150            if (form.encoding) {
151                jQuery(form).attr('encoding', 'multipart/form-data');
152            }
153            else {
154                jQuery(form).attr('enctype', 'multipart/form-data');
155            }
156            jQuery(form).submit();
157
158        } catch (e) {
159            jQuery.handleError(s, xml, null, e);
160        }
161
162        jQuery('#' + frameId).load(uploadCallback);
163        return { abort: function () { } };
164
165    },
166
167    uploadHttpData: function (r, type) {
168        var data = !type;
169        data = type == "xml" || data ? r.responseXML : r.responseText;
170        // If the type is "script", eval it in global context
171        if (type == "script")
172            jQuery.globalEval(data);
173        // Get the JavaScript object, if JSON is used.
174        if (type == "json")
175            data = $.parseJSON(data.replace(/<.*?>/ig, ""));
176        // evaluate scripts within html
177        if (type == "html")
178            jQuery("<div>").html(data).evalScripts();
179
180        return data;
181    },
182    handleError: function (s, xhr, status, e) {
183        // If a local callback was specified, fire it  
184        if (s.error) {
185            s.error.call(s.context || s, xhr, status, e);
186        }
187
188        // Fire the global callback  
189        if (s.global) {
190            (s.context ? jQuery(s.context) : jQuery.event).trigger("ajaxError", [xhr, s, e]);
191        }
192    }
193})
194