✨ feat: netutil - add new util func ParseAccept() for parse header Ac…

…cept

netutil/httpheader/header.go

@@ -7,7 +7,20 @@ const (
 
 	Accept = "Accept"
 	Cookie = "Cookie"
+	// Upgrade header. check websocket:
+	// 	header["Connection"] == "Upgrade" and header["Upgrade"] == "websocket"
+	Upgrade = "Upgrade"
 
 	AcceptEnc   = "Accept-Encoding"
 	ContentType = "Content-Type"
+	Connection  = "Connection"
+
+	XRealIP = "X-Real-IP"
+
+	XForwardedFor   = "X-Forwarded-For"
+	XForwardedHost  = "X-Forwarded-Host"
+	XForwardedProto = "X-Forwarded-Proto"
+
+	// XRequestedWith header. check ajax: header["X-Requested-With"] == XMLHttpRequest
+	XRequestedWith = "X-Requested-With"
 )

netutil/httpreq/util.go

@@ -374,3 +374,20 @@ func ResponseToString(w *http.Response) string {
 
 	return buf.String()
 }
+
+// ParseAccept header to strings. referred from gin framework
+func ParseAccept(acceptHeader string) []string {
+	if acceptHeader == "" {
+		return []string{}
+	}
+
+	parts := strings.Split(acceptHeader, ",")
+	outs := make([]string, 0, len(parts))
+
+	for _, part := range parts {
+		if part = strings.TrimSpace(strings.Split(part, ";")[0]); part != "" {
+			outs = append(outs, part)
+		}
+	}
+	return outs
+}

netutil/httpreq/util_test.go

@@ -126,3 +126,16 @@ func TestMergeURLValues(t *testing.T) {
 	uv = httpreq.MergeURLValues(nil, url.Values{"key2": []string{"val2"}})
 	assert.Eq(t, "val2", uv.Get("key2"))
 }
+
+func TestParseAccept(t *testing.T) {
+	// parseAccept
+	ss := httpreq.ParseAccept("")
+	assert.Len(t, ss, 0)
+
+	ss = httpreq.ParseAccept(",")
+	assert.Len(t, ss, 0)
+
+	ss = httpreq.ParseAccept("application/json")
+	assert.Len(t, ss, 1)
+	assert.Eq(t, []string{"application/json"}, ss)
+}