luci-ssr-plus: add Ping Latency detection support

package/lean/luci-app-ssr-plus/Makefile

@@ -2,7 +2,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=luci-app-ssr-plus
 PKG_VERSION:=1
-PKG_RELEASE:=100
+PKG_RELEASE:=101
 
 PKG_CONFIG_DEPENDS:= CONFIG_PACKAGE_$(PKG_NAME)_INCLUDE_Shadowsocks \
 	CONFIG_PACKAGE_$(PKG_NAME)_INCLUDE_V2ray \

package/lean/luci-app-ssr-plus/luasrc/model/cbi/shadowsocksr/servers.lua

@@ -101,4 +101,9 @@ function o.cfgvalue(...)
 	return Value.cfgvalue(...) or "0"
 end
 
+o = s:option(DummyValue,"server",translate("Ping Latency"))
+o.template="shadowsocksr/ping"
+o.width="10%"
+
+m:append(Template("shadowsocksr/server_list"))
 return m

package/lean/luci-app-ssr-plus/luasrc/view/shadowsocksr/ping.htm

@@ -0,0 +1,3 @@
+<%+cbi/valueheader%>
+<span class="pingtime" hint="<%=self:cfgvalue(section)%>">-- ms</span>
+<%+cbi/valuefooter%>

package/lean/luci-app-ssr-plus/luasrc/view/shadowsocksr/server_list.htm

@@ -0,0 +1,24 @@
+<%#
+ Copyright 2018-2019 Lienol <lawlienol@gmail.com>
+ Licensed to the public under the Apache License 2.0.
+-%>
+
+<%
+local dsp = require "luci.dispatcher"
+-%>
+
+<script type="text/javascript">
+	//<![CDATA[
+	var pings = document.getElementsByClassName('pingtime');
+	for(var i = 0; i < pings.length; i++) {
+		XHR.get('<%=dsp.build_url("admin/services/shadowsocksr/ping")%>', {
+				index: i,
+				domain: pings[i].getAttribute("hint")
+			},
+			function(x, result) {
+				pings[result.index].innerHTML = (result.ping ? result.ping : "--") + " ms";
+			}
+		);
+	}
+	//]]>
+</script>

package/lean/luci-app-ssr-plus/po/zh-cn/ssr-plus.po

@@ -508,3 +508,6 @@ msgstr "所有端口（默认）"
 
 msgid "Only Common Ports"
 msgstr "仅常用端口（不走P2P流量到代理）"
+
+msgid "Ping Latency"
+msgstr "Ping延迟"