cmd/resolver: implement command to fetch and print server environment

The "env" command fetch the current server environment and print as
ini format to stdout.

2 files changed, 47 insertions, 1 deletions

diff --git a/cmd/resolver/main.go b/cmd/resolver/main.go
index 90a1686..90fcc68 100644
--- a/cmd/resolver/main.go
+++ b/cmd/resolver/main.go
@@ -16,6 +16,7 @@ import (
 // List of valid commands.
 const (
 	cmdCaches = "caches"
+	cmdEnv    = "env"
 	cmdQuery  = "query"
 
 	subCmdSearch = "search"
@@ -83,6 +84,9 @@ func main() {
 			os.Exit(2)
 		}
 
+	case cmdEnv:
+		rsol.doCmdEnv()
+
 	case cmdQuery:
 		args = args[1:]
 		if len(args) == 0 {
@@ -165,6 +169,11 @@ caches remove <string>
 	Remove the domain name from rescached caches.
 	If the parameter is "all", it will remove all caches.
 
+env
+
+	Fetch the current server environment and print it as JSON format to
+	stdout.
+
 
 ==  Examples
 
@@ -197,5 +206,17 @@ Inspect the rescached's caches on server at http://127.0.0.1:5380,
 
 Search caches that contains "bit" on the domain name,
 
-	$ resolver -server=http://127.0.0.1:5380 caches search bit`)
+	$ resolver caches search bit
+
+Remove caches that contains domain name "kilabit.info",
+
+	$ resolver caches remove kilabit.info
+
+Remove all caches in the server,
+
+	$ resolver caches remove all
+
+Fetch and print current server environment,
+
+	$ resolver env`)
 }
diff --git a/cmd/resolver/resolver.go b/cmd/resolver/resolver.go
index 1985981..b7129cc 100644
--- a/cmd/resolver/resolver.go
+++ b/cmd/resolver/resolver.go
@@ -4,6 +4,7 @@
 package main
 
 import (
+	"encoding/json"
 	"fmt"
 	"log"
 	"math/rand"
@@ -103,6 +104,30 @@ func (rsol *resolver) doCmdCachesSearch(q string) {
 	printMessages(listMsg)
 }
 
+func (rsol *resolver) doCmdEnv() {
+	var (
+		resc = rsol.newRescachedClient()
+
+		env     *rescached.Environment
+		envJson []byte
+		err     error
+	)
+
+	env, err = resc.Env()
+	if err != nil {
+		log.Printf("resolver: %s: %s", rsol.cmd, err)
+		return
+	}
+
+	envJson, err = json.MarshalIndent(env, "", "  ")
+	if err != nil {
+		log.Printf("resolver: %s: %s", rsol.cmd, err)
+		return
+	}
+
+	fmt.Printf("%s\n", envJson)
+}
+
 func (rsol *resolver) doCmdQuery(args []string) {
 	var (
 		maxAttempts = defAttempts