Merge pull request #40 from ppiaas/master

fix excessive amount of connections ending up in TIME_WAIT

Author: magik6k

client.go

@@ -7,6 +7,7 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
+	"net"
 	"net/http"
 	"net/url"
 	"reflect"
@@ -30,6 +31,23 @@ var (
 	contextType = reflect.TypeOf(new(context.Context)).Elem()
 
 	log = logging.Logger("rpc")
+
+	 _defaultHTTPClient = &http.Client{
+		Transport: &http.Transport{
+			Proxy: http.ProxyFromEnvironment,
+			DialContext: (&net.Dialer{
+				Timeout:   30 * time.Second,
+				KeepAlive: 30 * time.Second,
+				DualStack: true,
+			}).DialContext,
+			ForceAttemptHTTP2:     true,
+			MaxIdleConns:          100,
+			MaxIdleConnsPerHost:   100,
+			IdleConnTimeout:       90 * time.Second,
+			TLSHandshakeTimeout:   10 * time.Second,
+			ExpectContinueTimeout: 1 * time.Second,
+		},
+	}
 )
 
 // ErrClient is an error which occurred on the client side the library
@@ -140,7 +158,7 @@ func httpClient(ctx context.Context, addr string, namespace string, outs []inter
 
 		hreq.Header.Set("Content-Type", "application/json")
 
-		httpResp, err := http.DefaultClient.Do(hreq)
+		httpResp, err := _defaultHTTPClient.Do(hreq)
 		if err != nil {
 			return clientResponse{}, err
 		}