ztimson/utils
ztimson/utils
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This commit is contained in:
Zakary Timson 2024-04-23 09:02:10 -04:00
parent d0e9cbcaa6
commit 9f57b93a9f
2 changed files with 13 additions and 7 deletions
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2
package.json
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@ -1,6 +1,6 @@
{ {
"name": "@ztimson/utils", "name": "@ztimson/utils",
"version": "0.6.0", "version": "0.7.0",
"description": "Utility library", "description": "Utility library",
"author": "Zak Timson", "author": "Zak Timson",
"license": "MIT", "license": "MIT",

18
src/download.ts
View File

@ -14,7 +14,15 @@ export function download(href: any, name: string) {
document.body.removeChild(a); document.body.removeChild(a);
} }
export function downloadStream(url: string, name?: string) { /**
* Download a URL using fetch so progress can be tracked. Uses Typed Emitter to emit a "progress" &
* "complete" event.
*
* @param {string} url
* @param {string} downloadName
* @return {TypedEmitter<downloadEvents>}
*/
export function downloadProgress(url: string, downloadName?: string) {
const emitter = new TypedEmitter<downloadEvents>(); const emitter = new TypedEmitter<downloadEvents>();
fetch(url).then(response => { fetch(url).then(response => {
const contentLength = response.headers.get('Content-Length') || '0'; const contentLength = response.headers.get('Content-Length') || '0';
@ -24,19 +32,17 @@ export function downloadStream(url: string, name?: string) {
reader?.read().then(function processResult(result) { reader?.read().then(function processResult(result) {
if(result.done) { if(result.done) {
const blob = new Blob(chunks); const blob = new Blob(chunks);
emitter.emit('progress', 1); if(downloadName) {
if(name) {
const url = URL.createObjectURL(blob); const url = URL.createObjectURL(blob);
download(url, name); download(url, downloadName);
URL.revokeObjectURL(url); URL.revokeObjectURL(url);
} }
emitter.emit('complete', blob); emitter.emit('complete', blob);
return;
} else { } else {
const chunk = result.value; const chunk = result.value;
chunks.push(chunk); chunks.push(chunk);
loaded += chunk.length; loaded += chunk.length;
const progress = Math.round((loaded / total) * 100); const progress = loaded / total;
emitter.emit('progress', progress); emitter.emit('progress', progress);
reader.read().then(processResult); reader.read().then(processResult);
} }