improve: support wget or curl

Makefile

@@ -20,7 +20,7 @@ define Package/luci-app-adguardhome
 	TITLE:=LuCI app for adguardhome
 	PKG_MAINTAINER:=<https://github.com/rufengsuixing/luci-app-adguardhome>
 	PKGARCH:=all
-	DEPENDS:=+wget
+	DEPENDS:=+!wget&&!curl:wget
 endef
 
 define Package/luci-app-adguardhome/description

root/usr/share/AdGuardHome/update_core.sh

@@ -13,15 +13,21 @@ check_if_already_running(){
 	[ "${running_tasks}" -gt "2" ] && echo -e "\nA task is already running."  && EXIT 2
 }
 
+check_wgetcurl(){
+	which curl && downloader="curl -L -k --retry 2 --connect-timeout 20 -o" && return
+	which wget-ssl && downloader="wget-ssl --no-check-certificate -t 2 -T 20 -O" && return
+	[ -z "$1" ] && opkg update || (echo error opkg && EXIT 1)
+	[ -z "$1" ] && (opkg remove wget wget-nossl --force-depends ; opkg install wget ; check_wgetcurl 1 ;return)
+	[ "$1" == "1" ] && (opkg install curl ; check_wgetcurl 2 ; return)
+	echo error curl and wget && EXIT 1
+}
 check_latest_version(){
-	latest_ver="$(wget -O- https://api.github.com/repos/AdguardTeam/AdGuardHome/releases/latest 2>/dev/null|grep -E 'tag_name' |grep -E 'v[0-9.]+' -o 2>/dev/null)"
+	check_wgetcurl
+	latest_ver="$($downloader - https://api.github.com/repos/AdguardTeam/AdGuardHome/releases/latest 2>/dev/null|grep -E 'tag_name' |grep -E 'v[0-9.]+' -o 2>/dev/null)"
 	if [ -z "${latest_ver}" ]; then
-		wget -V | grep +https >/dev/null || (opkg update && opkg remove wget-nossl --force-depends && opkg install wget && check_latest_version && EXIT 0) 
 		echo -e "\nFailed to check latest version, please try again later."  && EXIT 1
 	fi
-	touch /var/run/AdGfakeconfig 
-	now_ver="$($binpath -c /var/run/AdGfakeconfig --check-config 2>&1| grep -m 1 -E 'v[0-9.]+' -o)"
-	rm /var/run/AdGfakeconfig
+	now_ver="$($binpath -c /dev/null --check-config 2>&1| grep -m 1 -E 'v[0-9.]+' -o)"
 	if [ "${latest_ver}"x != "${now_ver}"x ] || [ "$1" == "force" ]; then
 		echo -e "Local version: ${now_ver}., cloud version: ${latest_ver}." 
 		doupdate_core
@@ -96,10 +102,10 @@ doupx(){
 	EXIT 1
 	;;
 	esac
-	upx_latest_ver="$(wget -O- https://api.github.com/repos/upx/upx/releases/latest 2>/dev/null|grep -E 'tag_name' |grep -E '[0-9.]+' -o 2>/dev/null)"
-	wget-ssl --no-check-certificate -t 1 -T 10 -O  /tmp/upx-${upx_latest_ver}-${Arch}_linux.tar.xz "https://github.com/upx/upx/releases/download/v${upx_latest_ver}/upx-${upx_latest_ver}-${Arch}_linux.tar.xz" 2>&1
+	upx_latest_ver="$($downloader - https://api.github.com/repos/upx/upx/releases/latest 2>/dev/null|grep -E 'tag_name' |grep -E '[0-9.]+' -o 2>/dev/null)"
+	$downloader /tmp/upx-${upx_latest_ver}-${Arch}_linux.tar.xz "https://github.com/upx/upx/releases/download/v${upx_latest_ver}/upx-${upx_latest_ver}-${Arch}_linux.tar.xz" 2>&1
 	#tar xvJf
-	which xz || (opkg update && opkg install xz) || (echo "xz download fail" && EXIT 1)
+	which xz || (opkg list | grep ^xz || opkg update && opkg install xz) || (echo "xz download fail" && EXIT 1)
 	mkdir -p /tmp/upx-${upx_latest_ver}-${Arch}_linux
 	xz -d -c /tmp/upx-${upx_latest_ver}-${Arch}_linux.tar.xz| tar -x -C "/tmp" >/dev/null 2>&1
 	if [ ! -e "/tmp/upx-${upx_latest_ver}-${Arch}_linux/upx" ]; then
@@ -165,7 +171,7 @@ doupdate_core(){
 	while read link
 	do
 		eval link="$link"
-		wget-ssl --no-check-certificate -t 2 -T 20 -O /tmp/AdGuardHomeupdate/${link##*/} "$link" 2>&1
+		$downloader /tmp/AdGuardHomeupdate/${link##*/} "$link" 2>&1
 		if [ "$?" != "0" ]; then
 			echo "download failed try another download"
 			rm -f /tmp/AdGuardHomeupdate/${link##*/}
@@ -196,7 +202,7 @@ doupdate_core(){
 		rm -rf /tmp/upx-${upx_latest_ver}-${Arch}_linux
 	fi
 	echo -e "start copy" 
-	/etc/init.d/AdGuardHome stop
+	/etc/init.d/AdGuardHome stop nobackup
 	rm "$binpath"
 	mv -f "$downloadbin" "$binpath"
 	if [ "$?" == "1" ]; then