feat: add matchers for HTTP and HTTPS addresses (#23)

The spec isn't well defined but these are the addresses in the wild.

src/index.ts

@@ -620,3 +620,45 @@ const _WebRTC = or(
  * ```
  */
 export const WebRTC = fmt(_WebRTC)
+
+const _HTTP = or(
+  and(_IP_OR_DOMAIN, literal('tcp'), number(), literal('http'), optional(peerId())),
+  and(_IP_OR_DOMAIN, literal('http'), optional(peerId()))
+)
+
+/**
+ * Matches HTTP addresses
+ *
+ * @example
+ *
+ * ```ts
+ * import { multiaddr } from '@multiformats/multiaddr'
+ * import { HTTP } from '@multiformats/multiaddr-matcher'
+ *
+ * HTTP.matches(multiaddr('/dns/example.org/http')) // true
+ * ```
+ */
+export const HTTP = fmt(_HTTP)
+
+const _HTTPS = or(
+  and(_IP_OR_DOMAIN, literal('tcp'), or(
+    and(literal('443'), literal('http')),
+    and(number(), literal('https'))
+  ), optional(peerId())),
+  and(_IP_OR_DOMAIN, literal('tls'), literal('http'), optional(peerId())),
+  and(_IP_OR_DOMAIN, literal('https'), optional(peerId()))
+)
+
+/**
+ * Matches HTTPS addresses
+ *
+ * @example
+ *
+ * ```ts
+ * import { multiaddr } from '@multiformats/multiaddr'
+ * import { HTTP } from '@multiformats/multiaddr-matcher'
+ *
+ * HTTP.matches(multiaddr('/dns/example.org/tls/http')) // true
+ * ```
+ */
+export const HTTPS = fmt(_HTTPS)

test/index.spec.ts

@@ -255,6 +255,47 @@ describe('multiaddr matcher', () => {
     '/unix/var/log'
   ]
 
+  const exactHTTP = [
+    '/ip4/0.0.0.0/tcp/80/http',
+    '/ip6/fc00::/tcp/80/http',
+    '/dns4/example.org/tcp/80/http',
+    '/dns6/example.org/tcp/80/http',
+    '/dnsaddr/example.org/tcp/80/http',
+    '/dns/example.org/tcp/7777/http',
+    '/dns/example.org/tcp/7777/http/p2p/12D3KooWQF6Q3i1QkziJQ9mkNNcyFD8GPQz6R6oEvT75wgsVXm4v'
+  ]
+
+  const goodHTTP = [
+    ...exactHTTP
+  ]
+
+  const badHTTP = [
+    '/ip4/0.0.0.0/udp/80/http'
+  ]
+
+  const exactHTTPS = [
+    '/ip4/0.0.0.0/tcp/0/https',
+    '/ip6/fc00::/tcp/0/https',
+    '/dns4/example.org/tcp/80/https',
+    '/dns6/example.org/tcp/80/https',
+    '/dnsaddr/example.org/tcp/80/https',
+    '/dns/example.org/tcp/7777/https',
+    '/dns4/example.org/tcp/443/http',
+    '/dns6/example.org/tcp/443/http',
+    '/dnsaddr/example.org/tcp/443/http',
+    '/dns/example.org/tcp/443/http',
+    '/dns4/example.org/tls/http',
+    '/dns/example.org/tls/http/p2p/12D3KooWQF6Q3i1QkziJQ9mkNNcyFD8GPQz6R6oEvT75wgsVXm4v'
+  ]
+
+  const goodHTTPS = [
+    ...exactHTTPS
+  ]
+
+  const badHTTPS = [
+    '/ip4/0.0.0.0/udp/80/http'
+  ]
+
   function assertMatches (p: MultiaddrMatcher, ...tests: string[][]): void {
     tests.forEach((test) => {
       test.forEach((testcase) => {
@@ -350,4 +391,16 @@ describe('multiaddr matcher', () => {
     assertExactMatches(mafmt.IP_OR_DOMAIN, exactIPorDomain)
     assertMismatches(mafmt.IP_OR_DOMAIN, badIPorDomain)
   })
+
+  it('HTTP addresses', () => {
+    assertMatches(mafmt.HTTP, goodHTTP)
+    assertExactMatches(mafmt.HTTP, exactHTTP)
+    assertMismatches(mafmt.HTTP, badHTTP)
+  })
+
+  it('HTTPS addresses', () => {
+    assertMatches(mafmt.HTTPS, goodHTTPS)
+    assertExactMatches(mafmt.HTTPS, exactHTTPS)
+    assertMismatches(mafmt.HTTPS, badHTTPS)
+  })
 })