sheetjs/bits/19_fsutils.js
SheetJS 75845a0ca7 version bump 0.11.19: browser writeFile
- IE6-9 ActiveX + VBScript shim
- `writeFile` supported in browser
- `oldie` demo for IE write strategies
2018-02-03 15:46:32 -05:00

38 lines
1.7 KiB
JavaScript

var _fs;
if(typeof require !== 'undefined') try { _fs = require('fs'); } catch(e) {}
/* normalize data for blob ctor */
function blobify(data) {
if(typeof data === "string") return s2ab(data);
if(Array.isArray(data)) return a2u(data);
return data;
}
/* write or download file */
function write_dl(fname/*:string*/, payload/*:any*/, enc/*:?string*/) {
/*global IE_SaveFile, Blob, navigator, saveAs, URL, document */
if(typeof _fs !== 'undefined' && _fs.writeFileSync) return enc ? _fs.writeFileSync(fname, payload, enc) : _fs.writeFileSync(fname, payload);
var data = (enc == "utf8") ? utf8write(payload) : payload;
/*:: declare var IE_SaveFile: any; */
if(typeof IE_SaveFile !== 'undefined') return IE_SaveFile(data, fname);
if(typeof Blob !== 'undefined') {
var blob = new Blob([blobify(data)], {type:"application/octet-stream"});
/*:: declare var navigator: any; */
if(typeof navigator !== 'undefined' && navigator.msSaveBlob) return navigator.msSaveBlob(blob, fname);
/*:: declare var saveAs: any; */
if(typeof saveAs !== 'undefined') return saveAs(blob, fname);
if(typeof URL !== 'undefined' && typeof document !== 'undefined' && document.createElement && URL.createObjectURL) {
var a = document.createElement("a");
if(a.download != null) {
var url = URL.createObjectURL(blob);
/*:: if(document.body == null) throw new Error("unreachable"); */
a.download = fname; a.href = url; document.body.appendChild(a); a.click();
/*:: if(document.body == null) throw new Error("unreachable"); */ document.body.removeChild(a);
if(URL.revokeObjectURL && typeof setTimeout !== 'undefined') setTimeout(function() { URL.revokeObjectURL(url); }, 60000);
return url;
}
}
}
throw new Error("cannot initiate download");
}