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export const ipcForbiddenHeaders = [
'accept-encoding',
'keepalive',
'keep-alive',
'content-encoding',
'transfer-encoding',
// https://github.com/nodejs/undici/issues/1470
'connection',
// marked as unsupported by undici: https://github.com/nodejs/undici/blob/c83b084879fa0bb8e0469d31ec61428ac68160d5/lib/core/request.js#L354
'expect',
]
export const actionsForbiddenHeaders = [
...ipcForbiddenHeaders,
'content-length',
'set-cookie',
]
export const filterReqHeaders = (
headers: Record<string, undefined | string | number | string[]>,
forbiddenHeaders: string[]
) => {
// Some browsers are not matching spec and sending Content-Length: 0. This causes issues in undici
// https://github.com/nodejs/undici/issues/2046
if (headers['content-length'] && headers['content-length'] === '0') {
delete headers['content-length']
}
for (const [key, value] of Object.entries(headers)) {
if (
forbiddenHeaders.includes(key) ||
!(Array.isArray(value) || typeof value === 'string')
) {
delete headers[key]
}
}
return headers as Record<string, undefined | string | string[]>
}
// These are headers that are only used internally and should
// not be honored from the external request
const INTERNAL_HEADERS = [
'x-middleware-rewrite',
'x-middleware-redirect',
'x-middleware-set-cookie',
'x-middleware-skip',
'x-middleware-override-headers',
'x-middleware-next',
'x-now-route-matches',
'x-matched-path',
]
export const filterInternalHeaders = (
headers: Record<string, undefined | string | string[]>
) => {
for (const header in headers) {
if (INTERNAL_HEADERS.includes(header)) {
delete headers[header]
}
}
}
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