I've studied all of the SO Similar Questions about this problem, a few were helpful, but did not directly address the saving of an xlsx file to the local Win10 downloads folder.
The xlsx file sits on a CentOS 7 server. If I use Filezilla to copy it to Win10, it's fine.
Looking at the component code below, I am reading the xlsx from the server and getting its base64Str, which matches exactly what I used to store the file. I create a blob fine, but FileSaver, saves the Win10 file with its contents as the base64Str, instead of a an xlsx binary. Can FileSaver save binary content, or only text?
Thanks for helping!
Component Code
//INPUT DATA: docName: test.xlsx; mediaType: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet; snippet base64Str: VUVzREJCUU...FBQUFBPQ=
//NOTE: input data is from a CentOS 7 filesystem
const byteStr = atob(base64Str);
const arrayBuffer = new ArrayBuffer(byteStr.length);
const int8Array = new Uint8Array(arrayBuffer);
for (let i = 0; i < byteStr.length; i++) {
int8Array[i] = byteStr.charCodeAt(i);
}
const blob = new Blob([arrayBuffer], { type: mediaType }); //also tried type: 'application/octet-stream'
//alternate technique that produces same corrupted result
//const base64Response = await fetch(`data:` +mediaType +`;base64,${base64Str}`);
//const blob = await base64Response.blob();
fileSaver.saveAs(blob, docName); //saves to Win10 downloads folder
