feat: migrate subdomain and dnslink code

Author: hacdias

examples/gateway-car/README.md

@@ -26,7 +26,7 @@ Then, you can start the gateway with:
 ./gateway -c data.car -p 8040
 ```
 
-Now you can access the gateway in [127.0.0.1:8040](http://127.0.0.1:8040). It will
+Now you can access the gateway in [localhost:8040](http://localhost:8040). It will
 behave like a regular IPFS Gateway, except for the fact that all contents are provided
 from the CAR file. Therefore, things such as IPNS resolution and fetching contents
 from nodes in the IPFS network won't work.

examples/gateway-car/main.go

@@ -26,20 +26,33 @@ func main() {
 	}
 	defer f.Close()
 
-	gateway, err := newBlocksGateway(blockService)
+	gwAPI, err := newBlocksGateway(blockService)
 	if err != nil {
 		log.Fatal(err)
 	}
 
-	handler := newHandler(gateway, *portPtr)
+	handler := newHandler(gwAPI, *portPtr)
 
-	address := "127.0.0.1:" + strconv.Itoa(*portPtr)
-	log.Printf("Listening on http://%s", address)
+	// Initialize the public gateways that we will want to have available through
+	// Host header rewritting. This step is optional and only required if you're
+	// running multiple public gateways and want different settings and support
+	// for DNSLink and Subdomain Gateways.
+	publicGateways := map[string]*gateway.Specification{
+		"localhost": {
+			Paths:         []string{"/ipfs", "/ipns"},
+			NoDNSLink:     true,
+			UseSubdomains: true,
+		},
+	}
+	noDNSLink := true
+	handler = gateway.WithHostname(handler, gwAPI, publicGateways, noDNSLink)
+
+	log.Printf("Listening on http://localhost:%d", *portPtr)
 	for _, cid := range roots {
-		log.Printf("Hosting CAR root at http://%s/ipfs/%s", address, cid.String())
+		log.Printf("Hosting CAR root at http://localhost:%d/ipfs/%s", *portPtr, cid.String())
 	}
 
-	if err := http.ListenAndServe(address, handler); err != nil {
+	if err := http.ListenAndServe(":"+strconv.Itoa(*portPtr), handler); err != nil {
 		log.Fatal(err)
 	}
 }

examples/go.mod

@@ -35,7 +35,10 @@ require (
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/gopacket v1.1.19 // indirect
 	github.com/google/uuid v1.3.0 // indirect
+	github.com/hashicorp/errwrap v1.1.0 // indirect
+	github.com/hashicorp/go-multierror v1.1.1 // indirect
 	github.com/hashicorp/golang-lru v0.5.4 // indirect
 	github.com/ipfs/bbloom v0.0.4 // indirect
 	github.com/ipfs/go-bitfield v1.0.0 // indirect
@@ -52,21 +55,31 @@ require (
 	github.com/ipfs/go-log v1.0.5 // indirect
 	github.com/ipfs/go-log/v2 v2.5.1 // indirect
 	github.com/ipfs/go-metrics-interface v0.0.1 // indirect
+	github.com/ipfs/go-namesys v0.7.0 // indirect
 	github.com/ipfs/go-verifcid v0.0.2 // indirect
 	github.com/ipld/go-car v0.5.0 // indirect
 	github.com/jbenet/goprocess v0.1.4 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.3 // indirect
 	github.com/libp2p/go-buffer-pool v0.1.0 // indirect
+	github.com/libp2p/go-cidranger v1.1.0 // indirect
 	github.com/libp2p/go-libp2p v0.23.4 // indirect
+	github.com/libp2p/go-libp2p-asn-util v0.2.0 // indirect
+	github.com/libp2p/go-libp2p-kad-dht v0.19.0 // indirect
+	github.com/libp2p/go-libp2p-kbucket v0.5.0 // indirect
+	github.com/libp2p/go-libp2p-record v0.2.0 // indirect
+	github.com/libp2p/go-msgio v0.2.0 // indirect
+	github.com/libp2p/go-netroute v0.2.0 // indirect
 	github.com/libp2p/go-openssl v0.1.0 // indirect
 	github.com/mattn/go-isatty v0.0.17 // indirect
 	github.com/mattn/go-pointer v0.0.1 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/miekg/dns v1.1.50 // indirect
 	github.com/minio/sha256-simd v1.0.0 // indirect
 	github.com/mr-tron/base58 v1.2.0 // indirect
 	github.com/multiformats/go-base32 v0.1.0 // indirect
 	github.com/multiformats/go-base36 v0.2.0 // indirect
 	github.com/multiformats/go-multiaddr v0.8.0 // indirect
+	github.com/multiformats/go-multiaddr-dns v0.3.1 // indirect
 	github.com/multiformats/go-multibase v0.1.1 // indirect
 	github.com/multiformats/go-multicodec v0.7.0 // indirect
 	github.com/multiformats/go-multihash v0.2.1 // indirect
@@ -83,18 +96,23 @@ require (
 	github.com/spacemonkeygo/spacelog v0.0.0-20180420211403-2296661a0572 // indirect
 	github.com/spaolacci/murmur3 v1.1.0 // indirect
 	github.com/ucarion/urlpath v0.0.0-20200424170820-7ccc79b76bbb // indirect
+	github.com/whyrusleeping/base32 v0.0.0-20170828182744-c30ac30633cc // indirect
 	github.com/whyrusleeping/cbor v0.0.0-20171005072247-63513f603b11 // indirect
 	github.com/whyrusleeping/cbor-gen v0.0.0-20230126041949-52956bd4c9aa // indirect
+	github.com/whyrusleeping/go-keyspace v0.0.0-20160322163242-5b898ac5add1 // indirect
+	go.opencensus.io v0.23.0 // indirect
 	go.opentelemetry.io/otel v1.12.0 // indirect
 	go.opentelemetry.io/otel/trace v1.12.0 // indirect
 	go.uber.org/atomic v1.10.0 // indirect
 	go.uber.org/multierr v1.9.0 // indirect
 	go.uber.org/zap v1.24.0 // indirect
 	golang.org/x/crypto v0.5.0 // indirect
 	golang.org/x/exp v0.0.0-20230129154200-a960b3787bd2 // indirect
+	golang.org/x/mod v0.6.0 // indirect
 	golang.org/x/net v0.5.0 // indirect
 	golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4 // indirect
 	golang.org/x/sys v0.4.0 // indirect
+	golang.org/x/tools v0.2.0 // indirect
 	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect