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490 lines
19 KiB
490 lines
19 KiB
5 years ago
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/*
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* jQuery File Download Plugin v1.4.5
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*
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* http://www.johnculviner.com
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*
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* Copyright (c) 2013 - John Culviner
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*
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* Licensed under the MIT license:
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* http://www.opensource.org/licenses/mit-license.php
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*
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* !!!!NOTE!!!!
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* You must also write a cookie in conjunction with using this plugin in the server's response headers containing the file download:
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* Set-Cookie: fileDownload=true; path=/"
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* !!!!NOTE!!!!
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*/
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(function($, window){
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// i'll just put them here to get evaluated on script load
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var htmlSpecialCharsRegEx = /[<>&\r\n"']/gm;
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var htmlSpecialCharsPlaceHolders = {
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'<': 'lt;',
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'>': 'gt;',
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'&': 'amp;',
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'\r': "#13;",
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'\n': "#10;",
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'"': 'quot;',
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"'": '#39;' /*single quotes just to be safe, IE8 doesn't support ', so use ' instead */
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};
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$.extend({
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//
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//$.fileDownload('/path/to/url/', options)
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// see directly below for possible 'options'
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fileDownload: function (fileUrl, options) {
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//provide some reasonable defaults to any unspecified options below
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var settings = $.extend({
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//
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//Requires jQuery UI: provide a message to display to the user when the file download is being prepared before the browser's dialog appears
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//
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preparingMessageHtml: null,
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//
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//Requires jQuery UI: provide a message to display to the user when a file download fails
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//
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failMessageHtml: null,
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//
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//the stock android browser straight up doesn't support file downloads initiated by a non GET: http://code.google.com/p/android/issues/detail?id=1780
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//specify a message here to display if a user tries with an android browser
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//if jQuery UI is installed this will be a dialog, otherwise it will be an alert
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//Set to null to disable the message and attempt to download anyway
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//
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androidPostUnsupportedMessageHtml: "Unfortunately your Android browser doesn't support this type of file download. Please try again with a different browser.",
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//
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//Requires jQuery UI: options to pass into jQuery UI Dialog
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//
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dialogOptions: { modal: true },
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//
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//a function to call while the dowload is being prepared before the browser's dialog appears
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//Args:
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// url - the original url attempted
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//
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prepareCallback: function (url) { },
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//
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//a function to call after a file download successfully completed
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//Args:
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// url - the original url attempted
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//
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successCallback: function (url) { },
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//
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//a function to call after a file download request was canceled
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//Args:
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// url - the original url attempted
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//
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abortCallback: function (url) { },
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//
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//a function to call after a file download failed
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//Args:
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// responseHtml - the html that came back in response to the file download. this won't necessarily come back depending on the browser.
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// in less than IE9 a cross domain error occurs because 500+ errors cause a cross domain issue due to IE subbing out the
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// server's error message with a "helpful" IE built in message
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// url - the original url attempted
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// error - original error cautch from exception
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//
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failCallback: function (responseHtml, url, error) { },
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//
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// the HTTP method to use. Defaults to "GET".
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//
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httpMethod: "GET",
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//
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// if specified will perform a "httpMethod" request to the specified 'fileUrl' using the specified data.
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// data must be an object (which will be $.param serialized) or already a key=value param string
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//
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data: null,
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//
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//a period in milliseconds to poll to determine if a successful file download has occured or not
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//
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checkInterval: 100,
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//
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//the cookie name to indicate if a file download has occured
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//
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cookieName: "fileDownload",
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//
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//the cookie value for the above name to indicate that a file download has occured
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//
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cookieValue: "true",
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//
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//the cookie path for above name value pair
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//
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cookiePath: "/",
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//
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//if specified it will be used when attempting to clear the above name value pair
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//useful for when downloads are being served on a subdomain (e.g. downloads.example.com)
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//
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cookieDomain: null,
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//
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//the title for the popup second window as a download is processing in the case of a mobile browser
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//
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popupWindowTitle: "Initiating file download...",
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//
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//Functionality to encode HTML entities for a POST, need this if data is an object with properties whose values contains strings with quotation marks.
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//HTML entity encoding is done by replacing all &,<,>,',",\r,\n characters.
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//Note that some browsers will POST the string htmlentity-encoded whilst others will decode it before POSTing.
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//It is recommended that on the server, htmlentity decoding is done irrespective.
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//
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encodeHTMLEntities: true
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}, options);
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var deferred = new $.Deferred();
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//Setup mobile browser detection: Partial credit: http://detectmobilebrowser.com/
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var userAgent = (navigator.userAgent || navigator.vendor || window.opera).toLowerCase();
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var isIos; //has full support of features in iOS 4.0+, uses a new window to accomplish this.
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var isAndroid; //has full support of GET features in 4.0+ by using a new window. Non-GET is completely unsupported by the browser. See above for specifying a message.
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var isOtherMobileBrowser; //there is no way to reliably guess here so all other mobile devices will GET and POST to the current window.
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if (/ip(ad|hone|od)/.test(userAgent)) {
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isIos = true;
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} else if (userAgent.indexOf('android') !== -1) {
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isAndroid = true;
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} else {
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isOtherMobileBrowser = /avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|playbook|silk|iemobile|iris|kindle|lge |maemo|midp|mmp|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(userAgent) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|e\-|e\/|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(di|rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|xda(\-|2|g)|yas\-|your|zeto|zte\-/i.test(userAgent.substr(0, 4));
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}
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var httpMethodUpper = settings.httpMethod.toUpperCase();
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if (isAndroid && httpMethodUpper !== "GET" && settings.androidPostUnsupportedMessageHtml) {
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//the stock android browser straight up doesn't support file downloads initiated by non GET requests: http://code.google.com/p/android/issues/detail?id=1780
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if ($().dialog) {
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$("<div>").html(settings.androidPostUnsupportedMessageHtml).dialog(settings.dialogOptions);
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} else {
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alert(settings.androidPostUnsupportedMessageHtml);
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}
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return deferred.reject();
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}
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var $preparingDialog = null;
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var internalCallbacks = {
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onPrepare: function (url) {
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//wire up a jquery dialog to display the preparing message if specified
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if (settings.preparingMessageHtml) {
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$preparingDialog = $("<div>").html(settings.preparingMessageHtml).dialog(settings.dialogOptions);
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} else if (settings.prepareCallback) {
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settings.prepareCallback(url);
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}
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},
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onSuccess: function (url) {
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//remove the perparing message if it was specified
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if ($preparingDialog) {
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$preparingDialog.dialog('close');
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}
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settings.successCallback(url);
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deferred.resolve(url);
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},
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onAbort: function (url) {
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//remove the perparing message if it was specified
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if ($preparingDialog) {
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$preparingDialog.dialog('close');
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};
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settings.abortCallback(url);
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deferred.reject(url);
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},
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onFail: function (responseHtml, url, error) {
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//remove the perparing message if it was specified
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if ($preparingDialog) {
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$preparingDialog.dialog('close');
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}
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//wire up a jquery dialog to display the fail message if specified
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if (settings.failMessageHtml) {
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$("<div>").html(settings.failMessageHtml).dialog(settings.dialogOptions);
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}
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settings.failCallback(responseHtml, url, error);
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deferred.reject(responseHtml, url);
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}
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};
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internalCallbacks.onPrepare(fileUrl);
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//make settings.data a param string if it exists and isn't already
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if (settings.data !== null && typeof settings.data !== "string") {
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settings.data = $.param(settings.data);
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}
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var $iframe,
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downloadWindow,
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formDoc,
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$form;
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if (httpMethodUpper === "GET") {
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if (settings.data !== null) {
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//need to merge any fileUrl params with the data object
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var qsStart = fileUrl.indexOf('?');
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if (qsStart !== -1) {
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//we have a querystring in the url
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if (fileUrl.substring(fileUrl.length - 1) !== "&") {
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fileUrl = fileUrl + "&";
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}
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} else {
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fileUrl = fileUrl + "?";
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}
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fileUrl = fileUrl + settings.data;
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}
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if (isIos || isAndroid) {
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downloadWindow = window.open(fileUrl);
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downloadWindow.document.title = settings.popupWindowTitle;
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window.focus();
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} else if (isOtherMobileBrowser) {
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window.location(fileUrl);
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} else {
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//create a temporary iframe that is used to request the fileUrl as a GET request
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$iframe = $("<iframe style='display: none' src='"+fileUrl+"'></iframe>").appendTo("body");
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}
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} else {
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var formInnerHtml = "";
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if (settings.data !== null) {
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$.each(settings.data.replace(/\+/g, ' ').split("&"), function () {
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var kvp = this.split("=");
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//Issue: When value contains sign '=' then the kvp array does have more than 2 items. We have to join value back
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var k = kvp[0];
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kvp.shift();
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var v = kvp.join("=");
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kvp = [k, v];
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var key = settings.encodeHTMLEntities ? htmlSpecialCharsEntityEncode(decodeURIComponent(kvp[0])) : decodeURIComponent(kvp[0]);
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if (key) {
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var value = settings.encodeHTMLEntities ? htmlSpecialCharsEntityEncode(decodeURIComponent(kvp[1])) : decodeURIComponent(kvp[1]);
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formInnerHtml += '<input type="hidden" name="' + key + '" value="' + value + '" />';
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}
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});
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}
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if (isOtherMobileBrowser) {
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$form = $("<form>").appendTo("body");
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$form.hide()
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.prop('method', settings.httpMethod)
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.prop('action', fileUrl)
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.html(formInnerHtml);
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} else {
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if (isIos) {
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downloadWindow = window.open("about:blank");
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downloadWindow.document.title = settings.popupWindowTitle;
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formDoc = downloadWindow.document;
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window.focus();
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} else {
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$iframe = $("<iframe style='display: none' src='about:blank'></iframe>").appendTo("body");
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formDoc = getiframeDocument($iframe);
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}
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formDoc.write("<html><head></head><body><form method='" + settings.httpMethod + "' action='" + fileUrl + "'>" + formInnerHtml + "</form>" + settings.popupWindowTitle + "</body></html>");
|
||
|
|
$form = $(formDoc).find('form');
|
||
|
|
}
|
||
|
|
|
||
|
|
$form.submit();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//check if the file download has completed every checkInterval ms
|
||
|
|
setTimeout(checkFileDownloadComplete, settings.checkInterval);
|
||
|
|
|
||
|
|
|
||
|
|
function checkFileDownloadComplete() {
|
||
|
|
//has the cookie been written due to a file download occuring?
|
||
|
|
|
||
|
|
var cookieValue = settings.cookieValue;
|
||
|
|
if(typeof cookieValue == 'string') {
|
||
|
|
cookieValue = cookieValue.toLowerCase();
|
||
|
|
}
|
||
|
|
|
||
|
|
var lowerCaseCookie = settings.cookieName.toLowerCase() + "=" + cookieValue;
|
||
|
|
|
||
|
|
if (document.cookie.toLowerCase().indexOf(lowerCaseCookie) > -1) {
|
||
|
|
|
||
|
|
//execute specified callback
|
||
|
|
internalCallbacks.onSuccess(fileUrl);
|
||
|
|
|
||
|
|
//remove cookie
|
||
|
|
var cookieData = settings.cookieName + "=; path=" + settings.cookiePath + "; expires=" + new Date(0).toUTCString() + ";";
|
||
|
|
if (settings.cookieDomain) cookieData += " domain=" + settings.cookieDomain + ";";
|
||
|
|
document.cookie = cookieData;
|
||
|
|
|
||
|
|
//remove iframe
|
||
|
|
cleanUp(false);
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
//has an error occured?
|
||
|
|
//if neither containers exist below then the file download is occuring on the current window
|
||
|
|
if (downloadWindow || $iframe) {
|
||
|
|
|
||
|
|
//has an error occured?
|
||
|
|
try {
|
||
|
|
|
||
|
|
var formDoc = downloadWindow ? downloadWindow.document : getiframeDocument($iframe);
|
||
|
|
|
||
|
|
if (formDoc && formDoc.body !== null && formDoc.body.innerHTML.length) {
|
||
|
|
|
||
|
|
var isFailure = true;
|
||
|
|
|
||
|
|
if ($form && $form.length) {
|
||
|
|
var $contents = $(formDoc.body).contents().first();
|
||
|
|
|
||
|
|
try {
|
||
|
|
if ($contents.length && $contents[0] === $form[0]) {
|
||
|
|
isFailure = false;
|
||
|
|
}
|
||
|
|
} catch (e) {
|
||
|
|
if (e && e.number == -2146828218) {
|
||
|
|
// IE 8-10 throw a permission denied after the form reloads on the "$contents[0] === $form[0]" comparison
|
||
|
|
isFailure = true;
|
||
|
|
} else {
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isFailure) {
|
||
|
|
// IE 8-10 don't always have the full content available right away, they need a litle bit to finish
|
||
|
|
setTimeout(function () {
|
||
|
|
internalCallbacks.onFail(formDoc.body.innerHTML, fileUrl);
|
||
|
|
cleanUp(true);
|
||
|
|
}, 100);
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
catch (err) {
|
||
|
|
|
||
|
|
//500 error less than IE9
|
||
|
|
internalCallbacks.onFail('', fileUrl, err);
|
||
|
|
|
||
|
|
cleanUp(true);
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//keep checking...
|
||
|
|
setTimeout(checkFileDownloadComplete, settings.checkInterval);
|
||
|
|
}
|
||
|
|
|
||
|
|
//gets an iframes document in a cross browser compatible manner
|
||
|
|
function getiframeDocument($iframe) {
|
||
|
|
var iframeDoc = $iframe[0].contentWindow || $iframe[0].contentDocument;
|
||
|
|
if (iframeDoc.document) {
|
||
|
|
iframeDoc = iframeDoc.document;
|
||
|
|
}
|
||
|
|
return iframeDoc;
|
||
|
|
}
|
||
|
|
|
||
|
|
function cleanUp(isFailure) {
|
||
|
|
|
||
|
|
setTimeout(function() {
|
||
|
|
|
||
|
|
if (downloadWindow) {
|
||
|
|
|
||
|
|
if (isAndroid) {
|
||
|
|
downloadWindow.close();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isIos) {
|
||
|
|
if (downloadWindow.focus) {
|
||
|
|
downloadWindow.focus(); //ios safari bug doesn't allow a window to be closed unless it is focused
|
||
|
|
if (isFailure) {
|
||
|
|
downloadWindow.close();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//iframe cleanup appears to randomly cause the download to fail
|
||
|
|
//not doing it seems better than failure...
|
||
|
|
//if ($iframe) {
|
||
|
|
// $iframe.remove();
|
||
|
|
//}
|
||
|
|
|
||
|
|
}, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function htmlSpecialCharsEntityEncode(str) {
|
||
|
|
return str.replace(htmlSpecialCharsRegEx, function(match) {
|
||
|
|
return '&' + htmlSpecialCharsPlaceHolders[match];
|
||
|
|
});
|
||
|
|
}
|
||
|
|
var promise = deferred.promise();
|
||
|
|
promise.abort = function() {
|
||
|
|
cleanUp();
|
||
|
|
$iframe.attr('src', '').html('');
|
||
|
|
internalCallbacks.onAbort(fileUrl);
|
||
|
|
};
|
||
|
|
return promise;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
})(jQuery, this || window);
|