luci-app-mosdns: Add DNS cache saving support

luci-app-mosdns/Makefile

@@ -10,6 +10,7 @@ LUCI_DEPENDS:=+mosdns +jsonfilter +luci-compat +curl +v2ray-geoip +v2ray-geosite
 
 define Package/$(PKG_NAME)/conffiles
 /etc/config/mosdns
+/etc/mosdns/cache.dump
 /etc/mosdns/config_custom.yaml
 /etc/mosdns/rule
 endef

luci-app-mosdns/luasrc/model/cbi/mosdns/basic.lua

@@ -80,14 +80,24 @@ remote_dns_pipeline:depends( "configfile", "/etc/mosdns/config.yaml")
 
 cache_size = s:option(Value, "cache_size", translate("DNS Cache Size"))
 cache_size.datatype = "and(uinteger,min(0))"
-cache_size.default = "200000"
+cache_size.default = "20000"
 cache_size:depends( "configfile", "/etc/mosdns/config.yaml")
 
 cache_size = s:option(Value, "cache_survival_time", translate("Cache Survival Time"))
 cache_size.datatype = "and(uinteger,min(0))"
-cache_size.default = "259200"
+cache_size.default = "86400"
 cache_size:depends( "configfile", "/etc/mosdns/config.yaml")
 
+cache_dump = s:option(Flag, "dump_file", translate("Save Cache"), translate("Save the cache locally to reload the cache on the next startup"))
+cache_dump.rmempty = false
+cache_dump.default = false
+cache_dump:depends( "configfile", "/etc/mosdns/config.yaml")
+
+cache_dump = s:option(Value, "dump_interval", translate("Auto Save Cache Interval"))
+cache_dump.datatype = "and(uinteger,min(0))"
+cache_dump.default = "600"
+cache_dump:depends("dump_file", "1")
+
 minimal_ttl = s:option(Value, "minimal_ttl", translate("Minimum TTL"))
 minimal_ttl.datatype = "and(uinteger,min(0))"
 minimal_ttl.datatype = "and(uinteger,max(3600))"

luci-app-mosdns/po/zh-cn/mosdns.po

@@ -139,6 +139,15 @@ msgstr "DNS 缓存大小（条）"
 msgid "Cache Survival Time"
 msgstr "缓存生存时间（秒）"
 
+msgid "Save Cache"
+msgstr "保存缓存"
+
+msgid "Save the cache locally to reload the cache on the next startup"
+msgstr "保存缓存到本地文件，以供下次启动时重新载入缓存"
+
+msgid "Auto Save Cache Interval"
+msgstr "自动保存缓存间隔（秒）"
+
 msgid "Minimum TTL"
 msgstr "覆盖最小 TTL 值（默认 0）"
 

luci-app-mosdns/root/etc/config/mosdns

@@ -10,8 +10,9 @@ config mosdns 'config'
 	option configfile '/etc/mosdns/config.yaml'
 	option log_level 'info'
 	option logfile '/tmp/mosdns.log'
-	option cache_size '200000'
-	option cache_survival_time '259200'
+	option cache_size '20000'
+	option cache_survival_time '86400'
+	option dump_file '0'
 	option minimal_ttl '0'
 	option maximum_ttl '0'
 	option custom_local_dns '0'

luci-app-mosdns/root/etc/init.d/mosdns

@@ -30,8 +30,10 @@ get_config() {
 	config_get enabled $1 enabled 0
 	config_get adblock $1 adblock 0
 	config_get ad_source $1 ad_source ""
-	config_get cache_size $1 cache_size 200000
-	config_get cache_survival_time $1 cache_survival_time 259200
+	config_get cache_size $1 cache_size 20000
+	config_get cache_survival_time $1 cache_survival_time 86400
+	config_get dump_file $1 dump_file 0
+	config_get dump_interval $1 dump_interval 600
 	config_get enable_pipeline $1 enable_pipeline 0
 	config_get geo_auto_update $1 geo_auto_update 0
 	config_get geo_update_day_time $1 geo_update_day_time 2
@@ -62,6 +64,7 @@ init_yaml() {
 	s,maximum_ttl_custom,$maximum_ttl_custom,g; \
 	s,adblock,$adlist,g;s,remote_dns_pipeline,$enable_pipeline,g" \
 	/usr/share/mosdns/default.yaml > $CONF
+	[ "$dump_file" -eq 1 ] && sed -i "/lazy_cache_ttl/a\      dump_file: /etc/mosdns/cache.dump\n      dump_interval: $dump_interval" $CONF
 	echo "${local_dns}" > $tmpdir/local_dns.txt
 	echo "${remote_dns}" > $tmpdir/remote_dns.txt
 	sed -i -e '/- addr: local_dns/{r '$tmpdir/local_dns.txt -e';d};/- addr: remote_dns/{r '$tmpdir/remote_dns.txt -e';d}' \