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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
/**
* Parse the parameter in a name/value pair and remove quotes.
*
* @param {string} paramValue
* A string representing a challenge parameter.
*
* @returns {object}
* An object with name and value string properties.
*/
function parseChallengeParameter(paramValue) {
const [name, value] = paramValue.split("=");
return { name, value: value?.replace(/["']/g, "") };
}
/**
* Simple parser for authenticate (WWW-Authenticate or Proxy-Authenticate)
* headers.
*
*
* @param {string} headerValue
* The value of an authenticate header.
*
* @returns {Array<object>}
* Array of challenge objects containing two properties:
* - {string} scheme: The scheme for the challenge
* - {Array<object>} params: Array of { name, value } objects representing
* all the parameters of the challenge.
*/
export function parseChallengeHeader(headerValue) {
const challenges = [];
const parts = headerValue.split(",").map(part => part.trim());
let scheme = null;
let params = [];
const schemeRegex = /^(\w+)(?:\s+(.*))?$/;
for (const part of parts) {
const matches = part.match(schemeRegex);
if (matches !== null) {
// This is a new scheme.
if (scheme !== null) {
// If we have a challenge recorded, add it to the array.
challenges.push({ scheme, params });
}
// Reset the state for a new scheme.
scheme = matches[1];
params = [];
if (matches[2]) {
params.push(parseChallengeParameter(matches[2]));
}
} else {
if (scheme === null) {
// A scheme should always be found before parameters, this header
// probably needs a more careful parsing solution.
return [];
}
params.push(parseChallengeParameter(part));
}
}
if (scheme !== null) {
// If we have a challenge recorded, add it to the array.
challenges.push({ scheme, params });
}
return challenges;
}