Fix http response body not closed correctly, return immediately on error (#210)

* Fix controller timer handler not return when error occurred

* Fix controller not close http response correctly

This PR aims to fix controller not close response correctly. Also, I’ve check all over the project there is no more resource leak issues exist after this patch.

* Fix controller not return immediately when error occurred

* Sort import

cache/cache.go

@@ -17,10 +17,10 @@ limitations under the License.
 package cache
 
 import (
-	"time"
-
 	"errors"
 	"fmt"
+	"time"
+
 	"github.com/fission/fission"
 )
 

cache/cache_test.go

@@ -16,9 +16,11 @@ limitations under the License.
 
 package cache
 
-import "testing"
-import "log"
-import "time"
+import (
+	"log"
+	"testing"
+	"time"
+)
 
 func checkErr(err error) {
 	if err != nil {

controller/client/client.go

@@ -213,6 +213,7 @@ func (c *Client) FunctionList() ([]fission.Function, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer resp.Body.Close()
 
 	body, err := c.handleResponse(resp)
 	if err != nil {
@@ -320,6 +321,7 @@ func (c *Client) HTTPTriggerList() ([]fission.HTTPTrigger, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer resp.Body.Close()
 
 	body, err := c.handleResponse(resp)
 	if err != nil {
@@ -427,6 +429,7 @@ func (c *Client) EnvironmentList() ([]fission.Environment, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer resp.Body.Close()
 
 	body, err := c.handleResponse(resp)
 	if err != nil {
@@ -514,6 +517,7 @@ func (c *Client) WatchList() ([]fission.Watch, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer resp.Body.Close()
 
 	body, err := c.handleResponse(resp)
 	if err != nil {
@@ -621,6 +625,7 @@ func (c *Client) TimeTriggerList() ([]fission.TimeTrigger, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer resp.Body.Close()
 
 	body, err := c.handleResponse(resp)
 	if err != nil {

controller/environmentApi.go

@@ -47,8 +47,8 @@ func (api *API) EnvironmentApiCreate(w http.ResponseWriter, r *http.Request) {
 	body, err := ioutil.ReadAll(r.Body)
 	if err != nil {
 		api.respondWithError(w, err)
+		return
 	}
-	defer r.Body.Close()
 
 	var env fission.Environment
 	err = json.Unmarshal(body, &env)
@@ -104,6 +104,7 @@ func (api *API) EnvironmentApiUpdate(w http.ResponseWriter, r *http.Request) {
 	body, err := ioutil.ReadAll(r.Body)
 	if err != nil {
 		api.respondWithError(w, err)
+		return
 	}
 
 	var env fission.Environment

controller/functionApi.go

@@ -50,6 +50,7 @@ func (api *API) FunctionApiCreate(w http.ResponseWriter, r *http.Request) {
 	body, err := ioutil.ReadAll(r.Body)
 	if err != nil {
 		api.respondWithError(w, err)
+		return
 	}
 
 	var f fission.Function
@@ -118,6 +119,7 @@ func (api *API) FunctionApiUpdate(w http.ResponseWriter, r *http.Request) {
 	body, err := ioutil.ReadAll(r.Body)
 	if err != nil {
 		api.respondWithError(w, err)
+		return
 	}
 
 	var f fission.Function

controller/httpTriggerApi.go

@@ -47,6 +47,7 @@ func (api *API) HTTPTriggerApiCreate(w http.ResponseWriter, r *http.Request) {
 	body, err := ioutil.ReadAll(r.Body)
 	if err != nil {
 		api.respondWithError(w, err)
+		return
 	}
 
 	var t fission.HTTPTrigger
@@ -116,6 +117,7 @@ func (api *API) HTTPTriggerApiUpdate(w http.ResponseWriter, r *http.Request) {
 	body, err := ioutil.ReadAll(r.Body)
 	if err != nil {
 		api.respondWithError(w, err)
+		return
 	}
 
 	var t fission.HTTPTrigger

controller/timeTriggerApi.go

@@ -48,6 +48,7 @@ func (api *API) TimeTriggerApiCreate(w http.ResponseWriter, r *http.Request) {
 	body, err := ioutil.ReadAll(r.Body)
 	if err != nil {
 		api.respondWithError(w, err)
+		return
 	}
 
 	var t fission.TimeTrigger
@@ -124,6 +125,7 @@ func (api *API) TimeTriggerApiUpdate(w http.ResponseWriter, r *http.Request) {
 	body, err := ioutil.ReadAll(r.Body)
 	if err != nil {
 		api.respondWithError(w, err)
+		return
 	}
 
 	var t fission.TimeTrigger

controller/watchApi.go

@@ -47,6 +47,7 @@ func (api *API) WatchApiCreate(w http.ResponseWriter, r *http.Request) {
 	body, err := ioutil.ReadAll(r.Body)
 	if err != nil {
 		api.respondWithError(w, err)
+		return
 	}
 
 	var watch fission.Watch

fission/environment.go

@@ -18,12 +18,12 @@ package main
 
 import (
 	"fmt"
+	"os"
 	"text/tabwriter"
 
 	"github.com/urfave/cli"
 
 	"github.com/fission/fission"
-	"os"
 )
 
 func envCreate(c *cli.Context) error {

kubewatcher/kubewatcher.go

@@ -23,6 +23,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"reflect"
 	"strings"
 	"sync/atomic"
 	"time"
@@ -36,7 +37,6 @@ import (
 
 	"github.com/fission/fission"
 	"github.com/fission/fission/publisher"
-	"reflect"
 )
 
 type requestType int

poolmgr/client/client.go

@@ -17,14 +17,14 @@ limitations under the License.
 package client
 
 import (
-	"net/http"
-	"strings"
-
 	"bytes"
 	"encoding/json"
-	"github.com/fission/fission"
 	"io/ioutil"
+	"net/http"
 	"net/url"
+	"strings"
+
+	"github.com/fission/fission"
 )
 
 type Client struct {

poolmgr/functionServiceCache_test.go

@@ -3,9 +3,9 @@ package poolmgr
 import (
 	"log"
 	"testing"
+	"time"
 
 	"github.com/fission/fission"
-	"time"
 )
 
 func TestFunctionServiceCache(t *testing.T) {