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http: optimize checkIsHttpToken for short strings #59832

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nodejs-github-bot merged 1 commit into from
Sep 14, 2025
Merged

http: optimize checkIsHttpToken for short strings #59832

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38 changes: 37 additions & 1 deletion lib/_http_common.js
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@
const {
MathMin,
Symbol,
Uint8Array,
} = primordials;
const { setImmediate } = require('timers');

Expand Down Expand Up @@ -205,7 +206,30 @@ function freeParser(parser, req, socket) {
}
}

// Character code ranges for valid HTTP tokens
// Valid chars: ^_`a-zA-Z-0-9!#$%&'*+.|~
// Based on RFC 7230 Section 3.2.6 token definition
// See https://tools.ietf.org/html/rfc7230#section-3.2.6
const tokenRegExp = /^[\^_`a-zA-Z\-0-9!#$%&'*+.|~]+$/;
const validTokenChars = new Uint8Array([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0-15
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16-31
0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, // 32-47 (!"#$%&'()*+,-./)
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48-63 (0-9:;<=>?)
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64-79 (@A-O)
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, // 80-95 (P-Z[\]^_)
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96-111 (`a-o)
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, // 112-127 (p-z{|}~)
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 128-143
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 144-159
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 160-175
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 176-191
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 192-207
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 208-223
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 224-239
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 240-255
]);

/**
* Verifies that the given val is a valid HTTP token
* per the rules defined in RFC 7230
Expand All @@ -214,7 +238,19 @@ const tokenRegExp = /^[\^_`a-zA-Z\-0-9!#$%&'*+.|~]+$/;
* @returns {boolean}
*/
function checkIsHttpToken(val) {
return tokenRegExp.test(val);
if (val.length >= 10) {
return tokenRegExp.test(val);
}

if (val.length === 0) return false;

// Use lookup table for short strings, regex for longer ones
for (let i = 0; i < val.length; i++) {
if (!validTokenChars[val.charCodeAt(i)]) {
return false;
}
}
return true;
}

const headerCharRegex = /[^\t\x20-\x7e\x80-\xff]/;
Expand Down
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