feat: support of http-path multiaddresses

lib/multiaddr.js

@@ -3,13 +3,32 @@
  * @returns {string} Parsed URI, e.g. `http://127.0.0.1:80`
  */
 export function multiaddrToHttpUrl (addr) {
-  const [, hostType, hostValue, ipProtocol, port, scheme, ...rest] = addr.split('/')
+  const [multiAddr, httpPathMultiAddr] = addr.split('/http-path/')
+  const [, hostType, hostValue, ...multiAddrParts] = multiAddr.split('/')
+  let scheme, path, rest
+  if (httpPathMultiAddr) {
+    scheme = multiAddrParts.shift()
+    rest = multiAddrParts
+    path = decodeURIComponent(httpPathMultiAddr)
+    if (!path) {
+      throw Object.assign(
+        new Error(`Cannot parse "${addr}": http-path is empty`),
+        { code: 'MULTIADDR_HAS_EMPTY_HTTP_PATH' }
+      )
+    }
+  } else {
+    const ipProtocol = multiAddrParts.shift()
+    const port = multiAddrParts.shift()
+    scheme = multiAddrParts.shift()
+    rest = multiAddrParts
 
-  if (ipProtocol !== 'tcp') {
-    throw Object.assign(
-      new Error(`Cannot parse "${addr}": unsupported protocol "${ipProtocol}"`),
-      { code: 'UNSUPPORTED_MULTIADDR_PROTO' }
-    )
+    if (ipProtocol !== 'tcp') {
+      throw Object.assign(
+        new Error(`Cannot parse "${addr}": unsupported protocol "${ipProtocol}"`),
+        { code: 'UNSUPPORTED_MULTIADDR_PROTO' }
+      )
+    }
+    path = getUriPort(scheme, port)
   }
 
   if (scheme !== 'http' && scheme !== 'https') {
@@ -25,8 +44,13 @@ export function multiaddrToHttpUrl (addr) {
       { code: 'MULTIADDR_HAS_TOO_MANY_PARTS' }
     )
   }
-
-  return `${scheme}://${getUriHost(hostType, hostValue)}${getUriPort(scheme, port)}`
+  if (scheme !== 'http' && scheme !== 'https') {
+    throw Object.assign(
+      new Error(`Cannot parse "${addr}": unsupported scheme "${scheme}"`),
+      { code: 'UNSUPPORTED_MULTIADDR_SCHEME' }
+    )
+  }
+  return `${scheme}://${getUriHost(hostType, hostValue)}${path}`
 }
 
 function getUriHost (hostType, hostValue) {

test/multiaddr.test.js

@@ -9,7 +9,8 @@ const HAPPY_CASES = [
   ['/ip4/127.0.0.1/tcp/8080/https', 'https://127.0.0.1:8080'],
   ['/dns/meridian.space/tcp/8080/http', 'http://meridian.space:8080'],
   ['/dns4/meridian.space/tcp/8080/http', 'http://meridian.space:8080'],
-  ['/dns6/meridian.space/tcp/8080/http', 'http://meridian.space:8080']
+  ['/dns6/meridian.space/tcp/8080/http', 'http://meridian.space:8080'],
+  ['/dns/meridian.space/https/http-path/%2Fipni-provider%2F12D3KooWJ91c8xqshrNe7QAXPFAaeRr0Wq2UrgXGPf8UmMZMwyZ5', 'https://meridian.space/ipni-provider/12D3KooWJ91c8xqshrNe7QAXPFAaeRr0Wq2UrgXGPf8UmMZMwyZ5']
 ]
 
 for (const [multiaddr, expectedUri] of HAPPY_CASES) {