From 1d57fd9f981d8dc85c2018a9089455a80f4d5b30 Mon Sep 17 00:00:00 2001
From: gammazero <11790789+gammazero@users.noreply.github.com>
Date: Mon, 8 Jul 2024 18:20:29 -0700
Subject: [PATCH] Use multiaddr http-path protocol

Now that http-path is an official par of multiaddr, use it to identify the path portion of an http multiaddr.
---
 dagsync/ipnisync/publisher_test.go |  3 ++-
 go.mod                             |  2 +-
 go.sum                             |  2 ++
 maurl/convert.go                   | 19 +++++++++++++------
 4 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/dagsync/ipnisync/publisher_test.go b/dagsync/ipnisync/publisher_test.go
index 93cf38a..41f240d 100644
--- a/dagsync/ipnisync/publisher_test.go
+++ b/dagsync/ipnisync/publisher_test.go
@@ -3,6 +3,7 @@ package ipnisync_test
 import (
 	"context"
 	"crypto/rand"
+	"fmt"
 	"io"
 	"net"
 	"net/http"
@@ -280,7 +281,7 @@ func TestNewPublisherForListener(t *testing.T) {
 			pathPart := strings.TrimLeft(handlerPath, "/")
 			expectedMaddr := "/ip4/192.168.200.1/tcp/8080/http"
 			if pathPart != "" {
-				expectedMaddr += "/httpath/" + url.PathEscape(pathPart)
+				expectedMaddr += fmt.Sprint("/", multiaddr.ProtocolWithCode(multiaddr.P_HTTP_PATH).Name, "/", url.PathEscape(pathPart))
 			}
 			req.Equal(expectedMaddr, maddr.String())
 
diff --git a/go.mod b/go.mod
index b9a187f..4eb75f3 100644
--- a/go.mod
+++ b/go.mod
@@ -16,7 +16,7 @@ require (
 	github.com/libp2p/go-libp2p-pubsub v0.11.0
 	github.com/libp2p/go-msgio v0.3.0
 	github.com/mr-tron/base58 v1.2.0
-	github.com/multiformats/go-multiaddr v0.12.4
+	github.com/multiformats/go-multiaddr v0.13.0
 	github.com/multiformats/go-multicodec v0.9.0
 	github.com/multiformats/go-multihash v0.2.3
 	github.com/multiformats/go-varint v0.0.7
diff --git a/go.sum b/go.sum
index def0754..8adeabf 100644
--- a/go.sum
+++ b/go.sum
@@ -233,6 +233,8 @@ github.com/multiformats/go-multiaddr v0.1.1/go.mod h1:aMKBKNEYmzmDmxfX88/vz+J5IU
 github.com/multiformats/go-multiaddr v0.2.0/go.mod h1:0nO36NvPpyV4QzvTLi/lafl2y95ncPj0vFwVF6k6wJ4=
 github.com/multiformats/go-multiaddr v0.12.4 h1:rrKqpY9h+n80EwhhC/kkcunCZZ7URIF8yN1WEUt2Hvc=
 github.com/multiformats/go-multiaddr v0.12.4/go.mod h1:sBXrNzucqkFJhvKOiwwLyqamGa/P5EIXNPLovyhQCII=
+github.com/multiformats/go-multiaddr v0.13.0 h1:BCBzs61E3AGHcYYTv8dqRH43ZfyrqM8RXVPT8t13tLQ=
+github.com/multiformats/go-multiaddr v0.13.0/go.mod h1:sBXrNzucqkFJhvKOiwwLyqamGa/P5EIXNPLovyhQCII=
 github.com/multiformats/go-multiaddr-dns v0.3.1 h1:QgQgR+LQVt3NPTjbrLLpsaT2ufAA2y0Mkk+QRVJbW3A=
 github.com/multiformats/go-multiaddr-dns v0.3.1/go.mod h1:G/245BRQ6FJGmryJCrOuTdB37AMA5AMOVuO6NY3JwTk=
 github.com/multiformats/go-multiaddr-fmt v0.1.0 h1:WLEFClPycPkp4fnIzoFoV9FVd49/eQsuaL3/CWe167E=
diff --git a/maurl/convert.go b/maurl/convert.go
index 8975256..7ccbd3f 100644
--- a/maurl/convert.go
+++ b/maurl/convert.go
@@ -10,7 +10,7 @@ import (
 	manet "github.com/multiformats/go-multiaddr/net"
 )
 
-// register an 'httpath' component:
+// register old 'httpath' component:
 var transcodePath = multiaddr.NewTranscoderFromFunctions(pathStB, pathBtS, pathVal)
 
 func pathVal(b []byte) error {
@@ -29,10 +29,13 @@ func pathBtS(b []byte) (string, error) {
 }
 
 func init() {
-	_ = multiaddr.AddProtocol(protoHTTPath)
+	_ = multiaddr.AddProtocol(oldProtoHTTPath)
 }
 
-var protoHTTPath = multiaddr.Protocol{
+// oldProtoHTTPath was used before "http-path" was part of multiaddr.
+//
+// TODO: remove when all providers have upgraded to IPNI with support for multiaddr.P_HTTP_PPATH
+var oldProtoHTTPath = multiaddr.Protocol{
 	Name:       "httpath",
 	Code:       0x300200,
 	VCode:      multiaddr.CodeToVarint(0x300200),
@@ -85,7 +88,11 @@ func ToURL(ma multiaddr.Multiaddr) (*url.URL, error) {
 	}
 
 	path := ""
-	if pb, ok := pm[protoHTTPath.Code]; ok {
+	pb, ok := pm[multiaddr.P_HTTP_PATH]
+	if !ok {
+		pb, ok = pm[oldProtoHTTPath.Code]
+	}
+	if ok {
 		path, err = url.PathUnescape(pb)
 		if err != nil {
 			path = ""
@@ -138,11 +145,11 @@ func FromURL(u *url.URL) (multiaddr.Multiaddr, error) {
 
 	joint := multiaddr.Join(*addr, http)
 	if u.Path != "" {
-		httpath, err := multiaddr.NewComponent(protoHTTPath.Name, url.PathEscape(u.Path))
+		httppath, err := multiaddr.NewComponent(multiaddr.ProtocolWithCode(multiaddr.P_HTTP_PATH).Name, url.PathEscape(u.Path))
 		if err != nil {
 			return nil, err
 		}
-		joint = multiaddr.Join(joint, httpath)
+		joint = multiaddr.Join(joint, httppath)
 	}
 
 	return joint, nil