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fix data url test #2580

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merged 1 commit into from
Jan 3, 2024
Merged

fix data url test #2580

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24 changes: 16 additions & 8 deletions lib/fetch/dataURL.js
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Original file line number Diff line number Diff line change
Expand Up @@ -604,14 +604,18 @@ function isHTTPWhiteSpace (char) {
* @param {boolean} [trailing=true]
*/
function removeHTTPWhitespace (str, leading = true, trailing = true) {
let i = 0; let j = str.length
let lead = 0
let trail = str.length - 1

if (leading) {
while (j > i && isHTTPWhiteSpace(str.charCodeAt(i))) --i
while (lead < str.length && isHTTPWhiteSpace(str.charCodeAt(lead))) lead++
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}

if (trailing) {
while (j > i && isHTTPWhiteSpace(str.charCodeAt(j - 1))) --j
while (trail > 0 && isHTTPWhiteSpace(str.charCodeAt(trail))) trail--
}
return i === 0 && j === str.length ? str : str.substring(i, j)

return lead === 0 && trail === str.length - 1 ? str : str.slice(lead, trail + 1)
}

/**
Expand All @@ -630,14 +634,18 @@ function isASCIIWhitespace (char) {
* @param {boolean} [trailing=true]
*/
function removeASCIIWhitespace (str, leading = true, trailing = true) {
let i = 0; let j = str.length
let lead = 0
let trail = str.length - 1

if (leading) {
while (j > i && isASCIIWhitespace(str.charCodeAt(i))) --i
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@KhafraDev KhafraDev Jan 2, 2024 •
edited

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so unless str.length was 0 j > i would always be true... and we're decrementing from i, which means if isASCIIWhitespace(...) was true, i would be negative? Not sure why I didn't realize this before.

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also using i and j instead of lead and trail shouldn't have landed

while (lead < str.length && isASCIIWhitespace(str.charCodeAt(lead))) lead++
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}

if (trailing) {
while (j > i && isASCIIWhitespace(str.charCodeAt(j - 1))) --j
while (trail > 0 && isASCIIWhitespace(str.charCodeAt(trail))) trail--
}
return i === 0 && j === str.length ? str : str.substring(i, j)

return lead === 0 && trail === str.length - 1 ? str : str.slice(lead, trail + 1)
}

module.exports = {
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