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Allow exclamation mark as valid header character #745

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merged 1 commit into from May 28, 2020
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2 changes: 1 addition & 1 deletion fetch.js
Expand Up @@ -44,7 +44,7 @@ function normalizeName(name) {
if (typeof name !== 'string') {
name = String(name)
}
if (/[^a-z0-9\-#$%&'*+.^_`|~]/i.test(name) || name === '') {
if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
throw new TypeError('Invalid character in header field name')
}
return name.toLowerCase()
Expand Down