bump go-pkgz/rest

vendor/github.com/go-pkgz/rest/go.mod

@@ -4,5 +4,5 @@ go 1.15
 
 require (
 	github.com/pkg/errors v0.9.1
-	github.com/stretchr/testify v1.6.1
+	github.com/stretchr/testify v1.7.0
 )

vendor/github.com/go-pkgz/rest/go.sum

@@ -8,6 +8,8 @@ github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=

vendor/github.com/go-pkgz/rest/gzip.go

@@ -9,6 +9,17 @@ import (
 	"sync"
 )
 
+var gzDefaultContentTypes = []string{
+	"text/css",
+	"text/javascript",
+	"text/xml",
+	"text/html",
+	"text/plain",
+	"application/javascript",
+	"application/x-javascript",
+	"application/json",
+}
+
 var gzPool = sync.Pool{
 	New: func() interface{} { return gzip.NewWriter(ioutil.Discard) },
 }
@@ -28,21 +39,51 @@ func (w *gzipResponseWriter) Write(b []byte) (int, error) {
 }
 
 // Gzip is a middleware compressing response
-func Gzip(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if !strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
-			next.ServeHTTP(w, r)
-			return
+func Gzip(contentTypes ...string) func(http.Handler) http.Handler {
+
+	gzCts := gzDefaultContentTypes
+	if len(contentTypes) > 0 {
+		gzCts = contentTypes
+	}
+
+	contentType := func(r *http.Request) string {
+		result := r.Header.Get("Content-type")
+		if result == "" {
+			return "application/octet-stream"
 		}
+		return result
+	}
 
-		w.Header().Set("Content-Encoding", "gzip")
+	f := func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if !strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
+				next.ServeHTTP(w, r)
+				return
+			}
 
-		gz := gzPool.Get().(*gzip.Writer)
-		defer gzPool.Put(gz)
+			var gzOk bool
+			ctype := contentType(r)
+			for _, c := range gzCts {
+				if strings.EqualFold(ctype, c) {
+					gzOk = true
+					break
+				}
+			}
 
-		gz.Reset(w)
-		defer gz.Close()
+			if !gzOk {
+				next.ServeHTTP(w, r)
+				return
+			}
 
-		next.ServeHTTP(&gzipResponseWriter{ResponseWriter: w, Writer: gz}, r)
-	})
+			w.Header().Set("Content-Encoding", "gzip")
+			gz := gzPool.Get().(*gzip.Writer)
+			defer gzPool.Put(gz)
+
+			gz.Reset(w)
+			defer gz.Close()
+
+			next.ServeHTTP(&gzipResponseWriter{ResponseWriter: w, Writer: gz}, r)
+		})
+	}
+	return f
 }