blob: 57897492b0ed6070386299ab3c88ee5194106a4f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
import { Injectable } from "@angular/core";
import { WindowRef } from "./window.service";
@Injectable()
export class FileUtilsService {
constructor(private windowRef: WindowRef){}
public byteCharactersToBlob = (byteCharacters, contentType):any => {
contentType = contentType || '';
let sliceSize = 1024;
let bytesLength = byteCharacters.length;
let slicesCount = Math.ceil(bytesLength / sliceSize);
let byteArrays = new Array(slicesCount);
for (let sliceIndex = 0; sliceIndex < slicesCount; ++sliceIndex) {
let begin = sliceIndex * sliceSize;
let end = Math.min(begin + sliceSize, bytesLength);
let bytes = new Array(end - begin);
for (let offset = begin, i = 0; offset < end; ++i, ++offset) {
bytes[i] = byteCharacters[offset].charCodeAt(0);
}
byteArrays[sliceIndex] = new Uint8Array(bytes);
}
return new Blob(byteArrays, {type: contentType});
};
public base64toBlob = (base64Data, contentType):any => {
let byteCharacters = atob(base64Data);
return this.byteCharactersToBlob(byteCharacters, contentType);
};
public downloadFile = (blob, fileName):void=> {
let url = this.windowRef.nativeWindow.URL.createObjectURL(blob);
let downloadLink = document.createElement("a");
downloadLink.setAttribute('href', url);
downloadLink.setAttribute('download', fileName);
document.body.appendChild(downloadLink);
var clickEvent = new MouseEvent("click", {
"view": window,
"bubbles": true,
"cancelable": true
});
downloadLink.dispatchEvent(clickEvent);
}
}
|
