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Add an example to search for multi-byte pattern in an array #39479

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Update example
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def00111 authored May 28, 2025
commit cc8beca0c55f1f8bfe9c3ab8074eaf771714ecb5
Original file line number Diff line number Diff line change
Expand Up @@ -405,22 +405,23 @@ function listener(details) {

const oldData = [];
filter.ondata = (event) => {
let data = new Uint8Array(event.data);
let data = event.data;
data = new Uint8Array(data);
data = Array.from(data);

if (oldData.length) {
data = oldData.concat(data);
oldData.length = 0;
}

const res = search(bytes, data);
let len = 0;
const res = search(bytes, data);
for (const i of res) {
// Insert "WebExtension " at the given index
data.splice(i + len, 0, ...elements);
len += elements.length;
}

data = new Uint8Array(data);
outer: for (let i = data.length - 1, l = data.length - bytes.length; i > l; i--) {
if (bytes[0] === data[i]) {
// Handle cases where the end of the data looks like "<h1>Exampl"
Expand All @@ -435,7 +436,7 @@ function listener(details) {
break;
}
}
filter.write(data);
filter.write(new Uint8Array(data));
};

filter.onstop = () => {
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