Revert "add error return for (Un)GzipData"

This reverts commit 8243710351.

weed-fs/src/cmd/weed/volume.go

@@ -156,9 +156,7 @@ func GetHandler(w http.ResponseWriter, r *http.Request) {
 			if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
 				w.Header().Set("Content-Encoding", "gzip")
 			} else {
-				if n.Data, err = storage.UnGzipData(n.Data); err != nil {
-					debug("lookup error:", err, r.URL.Path)
-				}
+				n.Data = storage.UnGzipData(n.Data)
 			}
 		}
 	}

weed-fs/src/pkg/storage/compress.go

@@ -15,35 +15,49 @@ func IsGzippable(ext, mtype string) bool {
     if strings.HasPrefix(mtype, "text/"){
         return true
     }
-	switch ext {
-	case ".zip", ".rar", ".gz", ".bz2", ".xz":
+	if ext == ".zip" {
 		return false
-	case ".pdf", ".txt", ".html", ".css", ".js", ".json":
+	}
+	if ext == ".rar" {
+		return false
+	}
+	if ext == ".gz" {
+		return false
+	}
+	if ext == ".pdf" {
+		return true
+	}
+	if ext == ".css" {
+		return true
+	}
+	if ext == ".js" {
+		return true
+	}
+    if ext == ".json" {
         return true
     }
 	if strings.HasPrefix(mtype, "application/") {
-		if strings.HasSuffix(mtype, "xml") ||
-			strings.HasSuffix(mtype, "script") {
+		if strings.HasSuffix(mtype, "xml") {
+			return true
+		}
+		if strings.HasSuffix(mtype, "script") {
 			return true
 		}
 	}
 	return false
 }
-
-func GzipData(input []byte) ([]byte, error) {
+func GzipData(input []byte) []byte {
 	buf := new(bytes.Buffer)
 	w, _ := gzip.NewWriterLevel(buf, flate.BestCompression)
 	if _, err := w.Write(input); err != nil {
 		println("error compressing data:", err)
-		return nil, err
 	}
 	if err := w.Close(); err != nil {
 		println("error closing compressed data:", err)
-		return nil, err
 	}
-	return buf.Bytes(), nil
+	return buf.Bytes()
 }
-func UnGzipData(input []byte) ([]byte, error) {
+func UnGzipData(input []byte) []byte {
 	buf := bytes.NewBuffer(input)
 	r, _ := gzip.NewReader(buf)
 	defer r.Close()
@@ -51,5 +65,5 @@ func UnGzipData(input []byte) ([]byte, error) {
 	if err != nil {
 		println("error uncompressing data:", err)
 	}
-	return output, err
+	return output
 }

weed-fs/src/pkg/storage/needle.go

@@ -64,9 +64,7 @@ func NewNeedle(r *http.Request) (n *Needle, fname string, e error) {
 		mtype = contentType
 	}
 	if IsGzippable(ext, mtype) {
-		if data, e = GzipData(data); e != nil {
-			return
-		}
+		data = GzipData(data)
 		n.SetGzipped()
 	}
 	if ext == ".gz" {