/
host-rules.ts
187 lines (169 loc) · 5.07 KB
/
host-rules.ts
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import URL from 'url';
import merge from 'deepmerge';
import { logger } from '../logger';
import { HostRule } from '../types';
import { clone } from './clone';
import * as sanitize from './sanitize';
let hostRules: HostRule[] = [];
const matchFields = ['hostName', 'domainName', 'baseUrl'];
export function add(params: HostRule): void {
const matchedFields = matchFields.filter((field) => params[field]);
if (matchedFields.length > 1) {
throw new Error(
`hostRules cannot contain more than one host-matching field. Found: [${matchedFields.join(
', '
)}]`
);
}
const confidentialFields = ['password', 'token'];
let resolvedHost = params.baseUrl || params.hostName || params.domainName;
if (resolvedHost) {
resolvedHost = URL.parse(resolvedHost).hostname || resolvedHost;
confidentialFields.forEach((field) => {
if (params[field]) {
logger.debug(
`Adding ${field} authentication for ${resolvedHost} to hostRules`
);
}
});
}
confidentialFields.forEach((field) => {
const secret = params[field];
if (secret && secret.length > 3) {
sanitize.add(secret);
}
});
if (params.username && params.password) {
const secret = Buffer.from(
`${params.username}:${params.password}`
).toString('base64');
sanitize.add(secret);
}
const hostRule = clone(params);
if (resolvedHost) {
hostRule.resolvedHost = resolvedHost;
}
hostRules.push(hostRule);
}
export interface HostRuleSearch {
hostType?: string;
url?: string;
}
function isEmptyRule(rule: HostRule): boolean {
return !rule.hostType && !rule.domainName && !rule.hostName && !rule.baseUrl;
}
function isHostTypeRule(rule: HostRule): boolean {
return rule.hostType && !rule.domainName && !rule.hostName && !rule.baseUrl;
}
function isDomainNameRule(rule: HostRule): boolean {
return !rule.hostType && !!rule.domainName;
}
function isHostNameRule(rule: HostRule): boolean {
return !rule.hostType && !!rule.hostName;
}
function isBaseUrlRule(rule: HostRule): boolean {
return !rule.hostType && !!rule.baseUrl;
}
function isMultiRule(rule: HostRule): boolean {
return rule.hostType && !!(rule.domainName || rule.hostName || rule.baseUrl);
}
function matchesHostType(rule: HostRule, search: HostRuleSearch): boolean {
return rule.hostType === search.hostType;
}
function matchesDomainName(rule: HostRule, search: HostRuleSearch): boolean {
const hostname = search.url && URL.parse(search.url).hostname;
return (
search.url &&
rule.domainName &&
hostname &&
hostname.endsWith(rule.domainName)
);
}
function matchesHostName(rule: HostRule, search: HostRuleSearch): boolean {
return (
search.url &&
rule.hostName &&
URL.parse(search.url).hostname === rule.hostName
);
}
function matchesBaseUrl(rule: HostRule, search: HostRuleSearch): boolean {
return search.url && rule.baseUrl && search.url.startsWith(rule.baseUrl);
}
export function find(search: HostRuleSearch): HostRule {
if (!(search.hostType || search.url)) {
logger.warn({ search }, 'Invalid hostRules search');
return {};
}
let res = ({} as any) as HostRule;
// First, apply empty rule matches
hostRules
.filter((rule) => isEmptyRule(rule))
.forEach((rule) => {
res = merge(res, rule);
});
// Next, find hostType-only matches
hostRules
.filter((rule) => isHostTypeRule(rule) && matchesHostType(rule, search))
.forEach((rule) => {
res = merge(res, rule);
});
// Next, find domainName-only matches
hostRules
.filter((rule) => isDomainNameRule(rule) && matchesDomainName(rule, search))
.forEach((rule) => {
res = merge(res, rule);
});
// Next, find hostName-only matches
hostRules
.filter((rule) => isHostNameRule(rule) && matchesHostName(rule, search))
.forEach((rule) => {
res = merge(res, rule);
});
// Next, find baseUrl-only matches
hostRules
.filter((rule) => isBaseUrlRule(rule) && matchesBaseUrl(rule, search))
.forEach((rule) => {
res = merge(res, rule);
});
// Finally, find combination matches
hostRules
.filter(
(rule) =>
isMultiRule(rule) &&
matchesHostType(rule, search) &&
(matchesDomainName(rule, search) ||
matchesHostName(rule, search) ||
matchesBaseUrl(rule, search))
)
.forEach((rule) => {
res = merge(res, rule);
});
delete res.hostType;
delete res.domainName;
delete res.hostName;
delete res.baseUrl;
delete res.resolvedHost;
return res;
}
export function hosts({ hostType }: { hostType: string }): string[] {
return hostRules
.filter((rule) => rule.hostType === hostType)
.map((rule) => {
if (rule.hostName) {
return rule.hostName;
}
if (rule.baseUrl) {
return URL.parse(rule.baseUrl).hostname;
}
return null;
})
.filter(Boolean);
}
export function findAll({ hostType }: { hostType: string }): HostRule[] {
return hostRules.filter((rule) => rule.hostType === hostType);
}
export function clear(): void {
logger.debug('Clearing hostRules');
hostRules = [];
sanitize.clear();
}