http-auth-client/basic.js

Client side HTTP Authorization header handling

const Auth = require('./auth')

class Basic {
	constructor(params) {
		params = params ? params.params || params : {}
		this.realm = params.realm || ""
		this.charset = params.charset == "UTF-8" ? "UTF-8" : ""
	}

	credentials(username, password) {
		this.secret = Buffer.from(username + ":" + password, this.charset == "UTF-8" ? "utf8": "ascii").toString('base64')
		return this
	}

	authorization() {
		if(!this.secret) throw new Error("No credentials")
		return this.type + " " + this.secret
	}

	update(params) {
		if(typeof params == 'string') {
			// params is a www-authenticate header
			var challenges = Auth.pick(params, [Basic])
			if(challenges.length != 1) throw new Error(`Challenge type ${this.type} not available`)

			params = challenges[0].params
		} else if(params && params.params) params = params.params

		if(params.realm) this.realm = params.realm
		if(params.charset) this.charset = params.charset == "UTF-8" ? "UTF-8" : ""

		// Always needs new credentials
		delete this.secret
		return true
	}
}

Basic.prototype.type = "Basic"

module.exports = Basic