add version info endpoint to gateway

cmd/ipfs/daemon.go

@@ -208,6 +208,7 @@ func daemonFunc(req cmds.Request, res cmds.Response) {
 	if gatewayMaddr != nil {
 		go func() {
 			var opts = []corehttp.ServeOption{
+				corehttp.VersionOption(),
 				corehttp.IPNSHostnameOption(),
 				corehttp.GatewayOption(writable),
 			}

core/corehttp/gateway.go

@@ -1,10 +1,12 @@
 package corehttp
 
 import (
+	"fmt"
 	"net/http"
 	"sync"
 
 	core "github.com/jbenet/go-ipfs/core"
+	id "github.com/jbenet/go-ipfs/p2p/protocol/identify"
 )
 
 // Gateway should be instantiated using NewGateway
@@ -43,6 +45,16 @@ func GatewayOption(writable bool) ServeOption {
 	return g.ServeOption()
 }
 
+func VersionOption() ServeOption {
+	return func(n *core.IpfsNode, mux *http.ServeMux) (*http.ServeMux, error) {
+		mux.HandleFunc("/version", func(w http.ResponseWriter, r *http.Request) {
+			fmt.Fprintf(w, "Client Version:   %s\n", id.ClientVersion)
+			fmt.Fprintf(w, "Protocol Version: %s\n", id.IpfsVersion)
+		})
+		return mux, nil
+	}
+}
+
 // Decider decides whether to Allow string
 type Decider func(string) bool
 

repo/config/version.go

@@ -8,7 +8,7 @@ import (
 )
 
 // CurrentVersionNumber is the current application's version literal
-const CurrentVersionNumber = "0.1.7"
+const CurrentVersionNumber = "0.2.0"
 
 // Version regulates checking if the most recent version is run
 type Version struct {