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| import type { OutgoingHttpHeaders } from 'http' | |
| import { | |
| NEXT_INTERCEPTION_MARKER_PREFIX, | |
| NEXT_QUERY_PARAM_PREFIX, | |
| } from '../../lib/constants' | |
| /** | |
| * Converts a Node.js IncomingHttpHeaders object to a Headers object. Any | |
| * headers with multiple values will be joined with a comma and space. Any | |
| * headers that have an undefined value will be ignored and others will be | |
| * coerced to strings. | |
| * | |
| * @param nodeHeaders the headers object to convert | |
| * @returns the converted headers object | |
| */ | |
| export function fromNodeOutgoingHttpHeaders( | |
| nodeHeaders: OutgoingHttpHeaders | |
| ): Headers { | |
| const headers = new Headers() | |
| for (let [key, value] of Object.entries(nodeHeaders)) { | |
| const values = Array.isArray(value) ? value : [value] | |
| for (let v of values) { | |
| if (typeof v === 'undefined') continue | |
| if (typeof v === 'number') { | |
| v = v.toString() | |
| } | |
| headers.append(key, v) | |
| } | |
| } | |
| return headers | |
| } | |
| /* | |
| Set-Cookie header field-values are sometimes comma joined in one string. This splits them without choking on commas | |
| that are within a single set-cookie field-value, such as in the Expires portion. | |
| This is uncommon, but explicitly allowed - see https://tools.ietf.org/html/rfc2616#section-4.2 | |
| Node.js does this for every header *except* set-cookie - see https://github.com/nodejs/node/blob/d5e363b77ebaf1caf67cd7528224b651c86815c1/lib/_http_incoming.js#L128 | |
| React Native's fetch does this for *every* header, including set-cookie. | |
| Based on: https://github.com/google/j2objc/commit/16820fdbc8f76ca0c33472810ce0cb03d20efe25 | |
| Credits to: https://github.com/tomball for original and https://github.com/chrusart for JavaScript implementation | |
| */ | |
| export function splitCookiesString(cookiesString: string) { | |
| var cookiesStrings = [] | |
| var pos = 0 | |
| var start | |
| var ch | |
| var lastComma | |
| var nextStart | |
| var cookiesSeparatorFound | |
| function skipWhitespace() { | |
| while (pos < cookiesString.length && /\s/.test(cookiesString.charAt(pos))) { | |
| pos += 1 | |
| } | |
| return pos < cookiesString.length | |
| } | |
| function notSpecialChar() { | |
| ch = cookiesString.charAt(pos) | |
| return ch !== '=' && ch !== ';' && ch !== ',' | |
| } | |
| while (pos < cookiesString.length) { | |
| start = pos | |
| cookiesSeparatorFound = false | |
| while (skipWhitespace()) { | |
| ch = cookiesString.charAt(pos) | |
| if (ch === ',') { | |
| // ',' is a cookie separator if we have later first '=', not ';' or ',' | |
| lastComma = pos | |
| pos += 1 | |
| skipWhitespace() | |
| nextStart = pos | |
| while (pos < cookiesString.length && notSpecialChar()) { | |
| pos += 1 | |
| } | |
| // currently special character | |
| if (pos < cookiesString.length && cookiesString.charAt(pos) === '=') { | |
| // we found cookies separator | |
| cookiesSeparatorFound = true | |
| // pos is inside the next cookie, so back up and return it. | |
| pos = nextStart | |
| cookiesStrings.push(cookiesString.substring(start, lastComma)) | |
| start = pos | |
| } else { | |
| // in param ',' or param separator ';', | |
| // we continue from that comma | |
| pos = lastComma + 1 | |
| } | |
| } else { | |
| pos += 1 | |
| } | |
| } | |
| if (!cookiesSeparatorFound || pos >= cookiesString.length) { | |
| cookiesStrings.push(cookiesString.substring(start, cookiesString.length)) | |
| } | |
| } | |
| return cookiesStrings | |
| } | |
| /** | |
| * Converts a Headers object to a Node.js OutgoingHttpHeaders object. This is | |
| * required to support the set-cookie header, which may have multiple values. | |
| * | |
| * @param headers the headers object to convert | |
| * @returns the converted headers object | |
| */ | |
| export function toNodeOutgoingHttpHeaders( | |
| headers: Headers | |
| ): OutgoingHttpHeaders { | |
| const nodeHeaders: OutgoingHttpHeaders = {} | |
| const cookies: string[] = [] | |
| if (headers) { | |
| for (const [key, value] of headers.entries()) { | |
| if (key.toLowerCase() === 'set-cookie') { | |
| // We may have gotten a comma joined string of cookies, or multiple | |
| // set-cookie headers. We need to merge them into one header array | |
| // to represent all the cookies. | |
| cookies.push(...splitCookiesString(value)) | |
| nodeHeaders[key] = cookies.length === 1 ? cookies[0] : cookies | |
| } else { | |
| nodeHeaders[key] = value | |
| } | |
| } | |
| } | |
| return nodeHeaders | |
| } | |
| /** | |
| * Validate the correctness of a user-provided URL. | |
| */ | |
| export function validateURL(url: string | URL): string { | |
| try { | |
| return String(new URL(String(url))) | |
| } catch (error: any) { | |
| throw new Error( | |
| `URL is malformed "${String( | |
| url | |
| )}". Please use only absolute URLs - https://nextjs.org/docs/messages/middleware-relative-urls`, | |
| { cause: error } | |
| ) | |
| } | |
| } | |
| /** | |
| * Normalizes `nxtP` and `nxtI` query param values to remove the prefix. | |
| * This function does not mutate the input key. | |
| */ | |
| export function normalizeNextQueryParam(key: string): null | string { | |
| const prefixes = [NEXT_QUERY_PARAM_PREFIX, NEXT_INTERCEPTION_MARKER_PREFIX] | |
| for (const prefix of prefixes) { | |
| if (key !== prefix && key.startsWith(prefix)) { | |
| return key.substring(prefix.length) | |
| } | |
| } | |
| return null | |
| } | |