metrics/librato: ensure resp.body closed (#26969)

This change ensures that we call Close on a http response body, in various places in the source code (mostly tests)

graphql/graphql_test.go

@@ -156,6 +156,7 @@ func TestGraphQLBlockSerialization(t *testing.T) {
 			t.Fatalf("could not post: %v", err)
 		}
 		bodyBytes, err := io.ReadAll(resp.Body)
+		resp.Body.Close()
 		if err != nil {
 			t.Fatalf("could not read from response body: %v", err)
 		}
@@ -239,6 +240,7 @@ func TestGraphQLBlockSerializationEIP2718(t *testing.T) {
 			t.Fatalf("could not post: %v", err)
 		}
 		bodyBytes, err := io.ReadAll(resp.Body)
+		resp.Body.Close()
 		if err != nil {
 			t.Fatalf("could not read from response body: %v", err)
 		}
@@ -263,6 +265,7 @@ func TestGraphQLHTTPOnSamePort_GQLRequest_Unsuccessful(t *testing.T) {
 	if err != nil {
 		t.Fatalf("could not post: %v", err)
 	}
+	resp.Body.Close()
 	// make sure the request is not handled successfully
 	assert.Equal(t, http.StatusNotFound, resp.StatusCode)
 }

metrics/librato/client.go

@@ -87,9 +87,11 @@ func (c *LibratoClient) PostMetrics(batch Batch) (err error) {
 	req.Header.Set("Content-Type", "application/json")
 	req.SetBasicAuth(c.Email, c.Token)
 
-	if resp, err = http.DefaultClient.Do(req); err != nil {
+	resp, err = http.DefaultClient.Do(req)
+	if err != nil {
 		return
 	}
+	defer resp.Body.Close()
 
 	if resp.StatusCode != http.StatusOK {
 		var body []byte

node/node_test.go

@@ -615,6 +615,7 @@ func doHTTPRequest(t *testing.T, req *http.Request) *http.Response {
 	if err != nil {
 		t.Fatalf("could not issue a GET request to the given endpoint: %v", err)
 	}
+	t.Cleanup(func() { resp.Body.Close() })
 	return resp
 }
 

node/rpcstack_test.go

@@ -320,6 +320,7 @@ func baseRpcRequest(t *testing.T, url, bodyStr string, extraHeaders ...string) *
 	if err != nil {
 		t.Fatal(err)
 	}
+	t.Cleanup(func() { resp.Body.Close() })
 	return resp
 }
 

p2p/simulations/adapters/exec.go

@@ -428,9 +428,11 @@ func execP2PNode() {
 
 	// Send status to the host.
 	statusJSON, _ := json.Marshal(status)
-	if _, err := http.Post(statusURL, "application/json", bytes.NewReader(statusJSON)); err != nil {
+	resp, err := http.Post(statusURL, "application/json", bytes.NewReader(statusJSON))
+	if err != nil {
 		log.Crit("Can't post startup info", "url", statusURL, "err", err)
 	}
+	resp.Body.Close()
 	if stackErr != nil {
 		os.Exit(1)
 	}

p2p/simulations/mocker_test.go

@@ -124,6 +124,7 @@ func TestMocker(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Could not start mocker: %s", err)
 	}
+	resp.Body.Close()
 	if resp.StatusCode != 200 {
 		t.Fatalf("Invalid Status Code received for starting mocker, expected 200, got %d", resp.StatusCode)
 	}
@@ -145,15 +146,17 @@ func TestMocker(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Could not stop mocker: %s", err)
 	}
+	resp.Body.Close()
 	if resp.StatusCode != 200 {
 		t.Fatalf("Invalid Status Code received for stopping mocker, expected 200, got %d", resp.StatusCode)
 	}
 
 	//reset the network
-	_, err = http.Post(s.URL+"/reset", "", nil)
+	resp, err = http.Post(s.URL+"/reset", "", nil)
 	if err != nil {
 		t.Fatalf("Could not reset network: %s", err)
 	}
+	resp.Body.Close()
 
 	//now the number of nodes in the network should be zero
 	nodesInfo, err = client.GetNodes()

rpc/http_test.go

@@ -94,6 +94,7 @@ func confirmHTTPRequestYieldsStatusCode(t *testing.T, method, contentType, body
 	if err != nil {
 		t.Fatalf("request failed: %v", err)
 	}
+	resp.Body.Close()
 	confirmStatusCode(t, resp.StatusCode, expectedStatusCode)
 }