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fix(ext/fetch): fix illegal header regex (#16236)

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This PR fixes invalid header parsing which is flaky because `g` flag is
being used in the regex, which keeps track of `lastIndex`

```javascript
try {
  new Headers([["x", "\u0000x"]]);  // error
} catch(e) {}
new Headers([["x", "\u0000x"]]); // no error
```

This issue affects `Response` & `Request` constructors as well
This commit is contained in:
Marcos Casagrande 2022-10-10 18:06:50 +02:00 • committed by GitHub
parent 70ad6717df
commit 0cd05d7377
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2 changed files with 15 additions and 2 deletions
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ext/fetch/20_headers.js
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@ -88,7 +88,7 @@
// Regex matching illegal chars in a header value
// deno-lint-ignore no-control-regex
const ILLEGAL_VALUE_CHARS = /[\x00\x0A\x0D]/g;
const ILLEGAL_VALUE_CHARS = /[\x00\x0A\x0D]/;
/**
* https://fetch.spec.whatwg.org/#concept-headers-append