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+//download.js v4.2, by dandavis; 2008-2016. [CCBY2] see http://danml.com/download.html for tests/usage
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+// v1 landed a FF+Chrome compat way of downloading strings to local un-named files, upgraded to use a hidden frame and optional mime
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+// v2 added named files via a[download], msSaveBlob, IE (10+) support, and window.URL support for larger+faster saves than dataURLs
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+// v3 added dataURL and Blob Input, bind-toggle arity, and legacy dataURL fallback was improved with force-download mime and base64 support. 3.1 improved safari handling.
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+// v4 adds AMD/UMD, commonJS, and plain browser support
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+// v4.1 adds url download capability via solo URL argument (same domain/CORS only)
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+// v4.2 adds semantic variable names, long (over 2MB) dataURL support, and hidden by default temp anchors
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+// https://github.com/rndme/download
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+
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+(function (root, factory) {
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+ if (typeof define === 'function' && define.amd) {
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+ // AMD. Register as an anonymous module.
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+ define([], factory);
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+ } else if (typeof exports === 'object') {
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+ // Node. Does not work with strict CommonJS, but
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+ // only CommonJS-like environments that support module.exports,
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+ // like Node.
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+ module.exports = factory();
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+ } else {
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+ // Browser globals (root is window)
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+ root.download = factory();
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+ }
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+}(this, function () {
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+
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+ return function download(data, strFileName, strMimeType) {
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+
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+ var self = window, // this script is only for browsers anyway...
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+ defaultMime = "application/octet-stream", // this default mime also triggers iframe downloads
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+ mimeType = strMimeType || defaultMime,
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+ payload = data,
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+ url = !strFileName && !strMimeType && payload,
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+ anchor = document.createElement("a"),
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+ toString = function(a){return String(a);},
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+ myBlob = (self.Blob || self.MozBlob || self.WebKitBlob || toString),
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+ fileName = strFileName || "download",
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+ blob,
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+ reader;
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+ myBlob= myBlob.call ? myBlob.bind(self) : Blob ;
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+
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+ if(String(this)==="true"){ //reverse arguments, allowing download.bind(true, "text/xml", "export.xml") to act as a callback
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+ payload=[payload, mimeType];
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+ mimeType=payload[0];
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+ payload=payload[1];
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+ }
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+
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+
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+ if(url && url.length< 2048){ // if no filename and no mime, assume a url was passed as the only argument
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+ fileName = url.split("/").pop().split("?")[0];
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+ anchor.href = url; // assign href prop to temp anchor
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+ if(anchor.href.indexOf(url) !== -1){ // if the browser determines that it's a potentially valid url path:
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+ var ajax=new XMLHttpRequest();
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+ ajax.open( "GET", url, true);
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+ ajax.responseType = 'blob';
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+ ajax.onload= function(e){
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+ download(e.target.response, fileName, defaultMime);
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+ };
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+ setTimeout(function(){ ajax.send();}, 0); // allows setting custom ajax headers using the return:
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+ return ajax;
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+ } // end if valid url?
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+ } // end if url?
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+
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+
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+ //go ahead and download dataURLs right away
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+ if(/^data\:[\w+\-]+\/[\w+\-]+[,;]/.test(payload)){
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+
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+ if(payload.length > (1024*1024*1.999) && myBlob !== toString ){
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+ payload=dataUrlToBlob(payload);
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+ mimeType=payload.type || defaultMime;
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+ }else{
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+ return navigator.msSaveBlob ? // IE10 can't do a[download], only Blobs:
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+ navigator.msSaveBlob(dataUrlToBlob(payload), fileName) :
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+ saver(payload) ; // everyone else can save dataURLs un-processed
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+ }
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+
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+ }//end if dataURL passed?
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+
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+ blob = payload instanceof myBlob ?
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+ payload :
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+ new myBlob([payload], {type: mimeType}) ;
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+
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+
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+ function dataUrlToBlob(strUrl) {
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+ var parts= strUrl.split(/[:;,]/),
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+ type= parts[1],
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+ decoder= parts[2] == "base64" ? atob : decodeURIComponent,
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+ binData= decoder( parts.pop() ),
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+ mx= binData.length,
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+ i= 0,
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+ uiArr= new Uint8Array(mx);
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+
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+ for(i;i<mx;++i) uiArr[i]= binData.charCodeAt(i);
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+
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+ return new myBlob([uiArr], {type: type});
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+ }
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+
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+ function saver(url, winMode){
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+
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+ if ('download' in anchor) { //html5 A[download]
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+ anchor.href = url;
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+ anchor.setAttribute("download", fileName);
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+ anchor.className = "download-js-link";
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+ anchor.innerHTML = "downloading...";
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+ anchor.style.display = "none";
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+ document.body.appendChild(anchor);
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+ setTimeout(function() {
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+ anchor.click();
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+ document.body.removeChild(anchor);
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+ if(winMode===true){setTimeout(function(){ self.URL.revokeObjectURL(anchor.href);}, 250 );}
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+ }, 66);
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+ return true;
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+ }
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+
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+ // handle non-a[download] safari as best we can:
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+ if(/(Version)\/(\d+)\.(\d+)(?:\.(\d+))?.*Safari\//.test(navigator.userAgent)) {
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+ url=url.replace(/^data:([\w\/\-\+]+)/, defaultMime);
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+ if(!window.open(url)){ // popup blocked, offer direct download:
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+ if(confirm("Displaying New Document\n\nUse Save As... to download, then click back to return to this page.")){ location.href=url; }
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+ }
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+ return true;
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+ }
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+
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+ //do iframe dataURL download (old ch+FF):
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+ var f = document.createElement("iframe");
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+ document.body.appendChild(f);
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+
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+ if(!winMode){ // force a mime that will download:
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+ url="data:"+url.replace(/^data:([\w\/\-\+]+)/, defaultMime);
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+ }
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+ f.src=url;
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+ setTimeout(function(){ document.body.removeChild(f); }, 333);
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+
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+ }//end saver
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+
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+
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+
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+
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+ if (navigator.msSaveBlob) { // IE10+ : (has Blob, but not a[download] or URL)
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+ return navigator.msSaveBlob(blob, fileName);
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+ }
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+
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+ if(self.URL){ // simple fast and modern way using Blob and URL:
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+ saver(self.URL.createObjectURL(blob), true);
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+ }else{
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+ // handle non-Blob()+non-URL browsers:
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+ if(typeof blob === "string" || blob.constructor===toString ){
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+ try{
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+ return saver( "data:" + mimeType + ";base64," + self.btoa(blob) );
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+ }catch(y){
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+ return saver( "data:" + mimeType + "," + encodeURIComponent(blob) );
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+ }
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+ }
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+
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+ // Blob but not URL support:
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+ reader=new FileReader();
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+ reader.onload=function(e){
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+ saver(this.result);
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+ };
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+ reader.readAsDataURL(blob);
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+ }
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+ return true;
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+ }; /* end download() */
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+}));
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Rodney Enciso Arias