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- //download.js v3.0, by dandavis; 2008-2014. [CCBY2] see http://danml.com/download.html for tests/usage
- // v1 landed a FF+Chrome compat way of downloading strings to local un-named files, upgraded to use a hidden frame and optional mime
- // v2 added named files via a[download], msSaveBlob, IE (10+) support, and window.URL support for larger+faster saves than dataURLs
- // v3 added dataURL and Blob Input, bind-toggle arity, and legacy dataURL fallback was improved with force-download mime and base64 support
- // data can be a string, Blob, File, or dataURL
-
-
-
- function download(data, strFileName, strMimeType) {
-
- var self = window, // this script is only for browsers anyway...
- u = "application/octet-stream", // this default mime also triggers iframe downloads
- m = strMimeType || u,
- x = data,
- D = document,
- a = D.createElement("a"),
- z = function(a){return String(a);},
-
-
- B = self.Blob || self.MozBlob || self.WebKitBlob || z,
- BB = self.MSBlobBuilder || self.WebKitBlobBuilder || self.BlobBuilder,
- fn = strFileName || "download",
- blob,
- b,
- ua,
- fr;
- //if(typeof B.bind === 'function' ){ B=B.bind(self); }
-
- if(String(this)==="true"){ //reverse arguments, allowing download.bind(true, "text/xml", "export.xml") to act as a callback
- x=[x, m];
- m=x[0];
- x=x[1];
- }
-
-
-
- //go ahead and download dataURLs right away
- if(String(x).match(/^data\:[\w+\-]+\/[\w+\-]+[,;]/)){
- return navigator.msSaveBlob ? // IE10 can't do a[download], only Blobs:
- navigator.msSaveBlob(d2b(x), fn) :
- saver(x) ; // everyone else can save dataURLs un-processed
- }//end if dataURL passed?
-
- try{
-
- blob = x instanceof B ?
- x :
- new B([x], {type: m}) ;
- }catch(y){
- if(BB){
- b = new BB();
- b.append([x]);
- blob = b.getBlob(m); // the blob
- }
-
- }
-
-
-
- function d2b(u) {
- var p= u.split(/[:;,]/),
- t= p[1],
- dec= p[2] == "base64" ? atob : decodeURIComponent,
- bin= dec(p.pop()),
- mx= bin.length,
- i= 0,
- uia= new Uint8Array(mx);
- for(i;i<mx;++i) uia[i]= bin.charCodeAt(i);
- return new B([uia], {type: t});
- }
-
- function saver(url, winMode){
-
-
- if ('download' in a) { //html5 A[download]
- a.href = url;
- a.setAttribute("download", fn);
- a.innerHTML = "downloading...";
- D.body.appendChild(a);
- setTimeout(function() {
- a.click();
- D.body.removeChild(a);
- if(winMode===true){setTimeout(function(){ self.URL.revokeObjectURL(a.href);}, 250 );}
- }, 66);
- return true;
- }
-
- //do iframe dataURL download (old ch+FF):
- var f = D.createElement("iframe");
- D.body.appendChild(f);
- if(!winMode){ // force a mime that will download:
- url="data:"+url.replace(/^data:([\w\/\-\+]+)/, u);
- }
-
-
- f.src = url;
- setTimeout(function(){ D.body.removeChild(f); }, 333);
-
- }//end saver
-
- if (navigator.msSaveBlob) { // IE10+ : (has Blob, but not a[download] or URL)
- return navigator.msSaveBlob(blob, fn);
- }
-
- if(self.URL){ // simple fast and modern way using Blob and URL:
- saver(self.URL.createObjectURL(blob), true);
- }else{
- // handle non-Blob()+non-URL browsers:
- if(typeof blob === "string" || blob.constructor===z ){
- try{
- return saver( "data:" + m + ";base64," + self.btoa(blob) );
- }catch(y){
- return saver( "data:" + m + "," + encodeURIComponent(blob) );
- }
- }
-
- // Blob but not URL:
- fr=new FileReader();
- fr.onload=function(e){
- saver(this.result);
- };
- fr.readAsDataURL(blob);
- }
- return true;
- } /* end download() */
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