'use strict';
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const assert = require('assert');
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/**
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* RegExp to match field-content in RFC 7230 sec 3.2
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*
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* field-content = field-vchar [ 1*( SP / HTAB ) field-vchar ]
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* field-vchar = VCHAR / obs-text
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* obs-text = %x80-FF
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*/
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const fieldContentRegExp = /^[\u0009\u0020-\u007e\u0080-\u00ff]+$/; // eslint-disable-line no-control-regex
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/**
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* RegExp to match Same-Site cookie attribute value.
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* https://en.wikipedia.org/wiki/HTTP_cookie#SameSite_cookie
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*/
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const sameSiteRegExp = /^(?:lax|strict)$/i;
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class Cookie {
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constructor(name, value, attrs) {
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assert(fieldContentRegExp.test(name), 'argument name is invalid');
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assert(!value || fieldContentRegExp.test(value), 'argument value is invalid');
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this.name = name;
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this.value = value || '';
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this.attrs = mergeDefaultAttrs(attrs);
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assert(!this.attrs.path || fieldContentRegExp.test(this.attrs.path), 'argument option path is invalid');
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assert(!this.attrs.domain || fieldContentRegExp.test(this.attrs.domain), 'argument option domain is invalid');
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assert(!this.attrs.sameSite || this.attrs.sameSite === true || sameSiteRegExp.test(this.attrs.sameSite), 'argument option sameSite is invalid');
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if (!value) {
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this.attrs.expires = new Date(0);
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// make sure maxAge is empty
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this.attrs.maxAge = null;
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}
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}
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toString() {
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return this.name + '=' + this.value;
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}
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toHeader() {
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let header = this.toString();
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const attrs = this.attrs;
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if (attrs.maxAge) attrs.expires = new Date(Date.now() + attrs.maxAge);
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if (attrs.path) header += '; path=' + attrs.path;
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if (attrs.expires) header += '; expires=' + attrs.expires.toUTCString();
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if (attrs.domain) header += '; domain=' + attrs.domain;
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if (attrs.sameSite) header += '; samesite=' + (attrs.sameSite === true ? 'strict' : attrs.sameSite.toLowerCase());
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if (attrs.secure) header += '; secure';
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if (attrs.httpOnly) header += '; httponly';
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return header;
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}
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}
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const ATTRS = [ 'path', 'expires', 'domain', 'httpOnly', 'secure', 'maxAge', 'overwrite', 'sameSite' ];
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function mergeDefaultAttrs(attrs) {
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const merged = {
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path: '/',
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httpOnly: true,
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secure: false,
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overwrite: false,
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sameSite: false,
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};
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if (!attrs) return merged;
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for (let i = 0; i < ATTRS.length; i++) {
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const key = ATTRS[i];
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if (key in attrs) merged[key] = attrs[key];
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}
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return merged;
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}
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module.exports = Cookie;
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