Add remote URL option to examples

examples/file-compression/file-compression.ts

@@ -2,6 +2,7 @@ import {
 	Input,
 	ALL_FORMATS,
 	BlobSource,
+	UrlSource,
 	Output,
 	BufferTarget,
 	Mp4OutputFormat,
@@ -12,7 +13,8 @@ import {
 import SampleFileUrl from '../../docs/assets/big-buck-bunny-trimmed.mp4';
 (document.querySelector('#sample-file-download') as HTMLAnchorElement).href = SampleFileUrl;
 
-const selectMediaButton = document.querySelector('button') as HTMLButtonElement;
+const selectMediaButton = document.querySelector('#select-file') as HTMLButtonElement;
+const loadUrlButton = document.querySelector('#load-url') as HTMLButtonElement;
 const fileNameElement = document.querySelector('#file-name') as HTMLParagraphElement;
 const horizontalRule = document.querySelector('hr') as HTMLHRElement;
 const progressBarContainer = document.querySelector('#progress-bar-container') as HTMLDivElement;
@@ -25,11 +27,11 @@ const errorElement = document.querySelector('#error-element') as HTMLParagraphEl
 let currentConversion: Conversion | null = null;
 let currentIntervalId = -1;
 
-const compressFile = async (file: File) => {
+const compressFile = async (resource: File | string) => {
 	clearInterval(currentIntervalId);
 	await currentConversion?.cancel();
 
-	fileNameElement.textContent = file.name;
+	fileNameElement.textContent = resource instanceof File ? resource.name : resource;
 	horizontalRule.style.display = '';
 	progressBarContainer.style.display = '';
 	speedometer.style.display = '';
@@ -39,12 +41,17 @@ const compressFile = async (file: File) => {
 	errorElement.textContent = '';
 
 	try {
-		// Create a new input from the file
+		// Create a new input from the resource
+		const source = resource instanceof File
+			? new BlobSource(resource)
+			: new UrlSource(resource);
 		const input = new Input({
-			source: new BlobSource(file),
+			source,
 			formats: ALL_FORMATS, // Accept all formats
 		});
 
+		const fileSize = await source.getSize();
+
 		// Define the output file
 		const output = new Output({
 			target: new BufferTarget(),
@@ -96,7 +103,7 @@ const compressFile = async (file: File) => {
 
 		compressionFacts.style.display = '';
 		compressionFacts.textContent
-			= `${(output.target.buffer!.byteLength / file.size * 100).toPrecision(3)}% of original size`;
+			= `${(output.target.buffer!.byteLength / fileSize * 100).toPrecision(3)}% of original size`;
 	} catch (error) {
 		console.error(error);
 
@@ -130,6 +137,19 @@ selectMediaButton.addEventListener('click', () => {
 	fileInput.click();
 });
 
+loadUrlButton.addEventListener('click', () => {
+	const url = prompt(
+		'Please enter a URL of a media file. Note that it must support cross-origin requests, so have the right'
+		+ ' CORS headers set.',
+		'http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4',
+	);
+	if (!url) {
+		return;
+	}
+
+	void compressFile(url);
+});
+
 document.addEventListener('dragover', (event) => {
 	event.preventDefault();
 	event.dataTransfer!.dropEffect = 'copy';