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added fetch get example for non-utf8 pages #2911

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20 changes: 20 additions & 0 deletions 5-network/01-fetch/article.md
Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,26 @@ let text = await response.text(); // read response body as text

alert(text.slice(0, 80) + '...');
```
If you are dealing with non UTF-8 charset pages, use `.arrayBuffer()` to get binary text and `TextDecoder()` to decode it into a specific encoding:

```js run
fetch('/article/fetch/non-utf8-page.html')
.then( response => response.arrayBuffer() )
.then( bytes => {
let krDecoder = new TextDecoder('EUC-KR');
let decodedHtml = krDecoder.decode(bytes);
return decodedHtml;
})
.then( html => {
let parser = new DOMParser();
let doc = parser.parserFromString(html,'text/html');
return doc.documentElement.outerHTML;
})
.then( result => alert(result) )
.catch( err => {
console.warn('Error occurred. ', err);
});
```

As a show-case for reading in binary format, let's fetch and show a logo image of ["fetch" specification](https://fetch.spec.whatwg.org) (see chapter [Blob](info:blob) for details about operations on `Blob`):

Expand Down
6 changes: 6 additions & 0 deletions 5-network/01-fetch/non-utf8-page.html
Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
<!DOCTYPE html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=euc_kr">
</head>
<body>한글</body>
</html>