pkg/middleware: Check errors (#19749)

* pkg/middleware: Check errors
* pkg/middleware: Log when gzip middleware handler fails

pkg/middleware/auth_proxy/auth_proxy_test.go

@@ -80,14 +80,15 @@ func TestMiddlewareContext(t *testing.T) {
 			Convey("with a simple cache key", func() {
 				// Set cache key
 				key := fmt.Sprintf(CachePrefix, base32.StdEncoding.EncodeToString([]byte(name)))
-				store.Set(key, int64(33), 0)
+				err := store.Set(key, int64(33), 0)
+				So(err, ShouldBeNil)
 
 				// Set up the middleware
 				auth := prepareMiddleware(t, req, store)
 				id, err := auth.Login()
+				So(err, ShouldBeNil)
 
 				So(auth.getKey(), ShouldEqual, "auth-proxy-sync-ttl:NVQXE23FNRXWO===")
-				So(err, ShouldBeNil)
 				So(id, ShouldEqual, 33)
 			})
 
@@ -97,14 +98,14 @@ func TestMiddlewareContext(t *testing.T) {
 				req.Header.Add("X-WEBAUTH-GROUPS", group)
 
 				key := fmt.Sprintf(CachePrefix, base32.StdEncoding.EncodeToString([]byte(name+"-"+group)))
-				store.Set(key, int64(33), 0)
+				err := store.Set(key, int64(33), 0)
+				So(err, ShouldBeNil)
 
 				auth := prepareMiddleware(t, req, store)
 
 				id, err := auth.Login()
-
-				So(auth.getKey(), ShouldEqual, "auth-proxy-sync-ttl:NVQXE23FNRXWOLLHOJQWMYLOMEWWG33SMUWXIZLBNU======")
 				So(err, ShouldBeNil)
+				So(auth.getKey(), ShouldEqual, "auth-proxy-sync-ttl:NVQXE23FNRXWOLLHOJQWMYLOMEWWG33SMUWXIZLBNU======")
 				So(id, ShouldEqual, 33)
 			})
 

pkg/middleware/middleware_test.go

@@ -346,7 +346,8 @@ func TestMiddlewareContext(t *testing.T) {
 				})
 
 				key := fmt.Sprintf(cachePrefix, base32.StdEncoding.EncodeToString([]byte(name+"-"+group)))
-				sc.remoteCacheService.Set(key, int64(33), 0)
+				err := sc.remoteCacheService.Set(key, int64(33), 0)
+				So(err, ShouldBeNil)
 				sc.fakeReq("GET", "/")
 
 				sc.req.Header.Add(setting.AuthProxyHeaderName, name)

pkg/middleware/util.go

@@ -4,11 +4,13 @@ import (
 	"strings"
 
 	"github.com/go-macaron/gzip"
+	"github.com/grafana/grafana/pkg/infra/log"
 	"gopkg.in/macaron.v1"
 )
 
 func Gziper() macaron.Handler {
-	macaronGziper := gzip.Gziper()
+	gziperLogger := log.New("gziper")
+	gziper := gzip.Gziper()
 
 	return func(ctx *macaron.Context) {
 		requestPath := ctx.Req.URL.RequestURI()
@@ -25,6 +27,8 @@ func Gziper() macaron.Handler {
 			return
 		}
 
-		ctx.Invoke(macaronGziper)
+		if _, err := ctx.Invoke(gziper); err != nil {
+			gziperLogger.Error("Invoking gzip handler failed", "err", err)
+		}
 	}
 }