http: improve validation performance
The new table-based lookups perform significantly better for the common cases (checking latin1 characters). PR-URL: https://github.com/nodejs/node/pull/6533 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
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Brian White
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@ -246,44 +246,44 @@ exports.httpSocketSetup = httpSocketSetup;
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* so take care when making changes to the implementation so that the source
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* code size does not exceed v8's default max_inlined_source_size setting.
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**/
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function isValidTokenChar(ch) {
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if (ch >= 94 && ch <= 122)
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return true;
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if (ch >= 65 && ch <= 90)
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return true;
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if (ch === 45)
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return true;
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if (ch >= 48 && ch <= 57)
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return true;
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if (ch === 34 || ch === 40 || ch === 41 || ch === 44)
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return false;
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if (ch >= 33 && ch <= 46)
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return true;
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if (ch === 124 || ch === 126)
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return true;
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return false;
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}
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var validTokens = [
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0 - 15
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16 - 31
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0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, // 32 - 47
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48 - 63
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0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64 - 79
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, // 80 - 95
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96 - 111
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, // 112 - 127
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 128 ...
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 // ... 255
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];
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function checkIsHttpToken(val) {
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if (typeof val !== 'string' || val.length === 0)
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return false;
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if (!isValidTokenChar(val.charCodeAt(0)))
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if (!validTokens[val.charCodeAt(0)])
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return false;
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const len = val.length;
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if (len > 1) {
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if (!isValidTokenChar(val.charCodeAt(1)))
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if (val.length < 2)
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return true;
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if (!validTokens[val.charCodeAt(1)])
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return false;
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if (val.length < 3)
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return true;
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if (!validTokens[val.charCodeAt(2)])
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return false;
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if (val.length < 4)
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return true;
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if (!validTokens[val.charCodeAt(3)])
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return false;
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for (var i = 4; i < val.length; ++i) {
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if (!validTokens[val.charCodeAt(i)])
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return false;
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if (len > 2) {
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if (!isValidTokenChar(val.charCodeAt(2)))
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return false;
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if (len > 3) {
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if (!isValidTokenChar(val.charCodeAt(3)))
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return false;
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for (var i = 4; i < len; i++) {
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if (!isValidTokenChar(val.charCodeAt(i)))
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return false;
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}
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}
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}
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}
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return true;
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}
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@ -299,26 +299,44 @@ exports._checkIsHttpToken = checkIsHttpToken;
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* so take care when making changes to the implementation so that the source
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* code size does not exceed v8's default max_inlined_source_size setting.
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**/
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var validHdrChars = [
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0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, // 0 - 15
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16 - 31
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 32 - 47
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 48 - 63
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64 - 79
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 80 - 95
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96 - 111
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, // 112 - 127
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 128 ...
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 // ... 255
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];
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function checkInvalidHeaderChar(val) {
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val += '';
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if (val.length < 1)
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return false;
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var c = val.charCodeAt(0);
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if ((c <= 31 && c !== 9) || c > 255 || c === 127)
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if (!validHdrChars[val.charCodeAt(0)])
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return true;
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if (val.length < 2)
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return false;
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c = val.charCodeAt(1);
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if ((c <= 31 && c !== 9) || c > 255 || c === 127)
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if (!validHdrChars[val.charCodeAt(1)])
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return true;
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if (val.length < 3)
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return false;
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c = val.charCodeAt(2);
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if ((c <= 31 && c !== 9) || c > 255 || c === 127)
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if (!validHdrChars[val.charCodeAt(2)])
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return true;
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for (var i = 3; i < val.length; ++i) {
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c = val.charCodeAt(i);
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if ((c <= 31 && c !== 9) || c > 255 || c === 127)
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if (val.length < 4)
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return false;
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if (!validHdrChars[val.charCodeAt(3)])
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return true;
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for (var i = 4; i < val.length; ++i) {
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if (!validHdrChars[val.charCodeAt(i)])
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return true;
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}
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return false;
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