dnspod support customized command to get wan ip (#1705)

fix dnspod clear log bug

package/lean/luci-app-dnspod/files/dnspod.sh

@@ -24,6 +24,12 @@ if [[ $wait_second =~ ^[1-9][0-9]*$ ]]; then
     wait=$wait_second
 fi
 
+#外网ip获取命令
+command=`uci get dnspod.base_arg.command_to_get_ip 2>/dev/null`
+if [ -z "$command" ]; then
+    command='curl -s whatismyip.akamai.com'
+fi
+
 #检查curl是否安装
 curl_status=`which curl 2>/dev/null`
 [ -n "$curl_status" ] || { echo "curl is not installed";exit 3; }
@@ -32,7 +38,7 @@ os=$(uname -a | egrep -io 'openwrt' | tr [A-Z] [a-z])
 
 API_url="https://dnsapi.cn"
 LOG_FILE="/tmp/dnspod.log"
-MAX_LOG_SIZE=1*1024*1024
+MAX_LOG_SIZE=`expr 1 * 1024 * 1024` # 默认最大限制1M
 PROGRAM=$(basename $0)
 
 format='json'
@@ -45,15 +51,16 @@ last_modified_ip=
 
 getFileSize() {
     local file=$1
-    wc -c $file
+    wc -c $file | awk '{print $1}'
 }
 
 clearLog() {
     local file_size=$(getFileSize $LOG_FILE)
     if [ $file_size -gt $MAX_LOG_SIZE ]; then
         echo "" > $LOG_FILE
+        printMsg "Log file [$LOG_FILE], size: [$file_size bytes]."
+        printMsg "Exceeds max log size [$MAX_LOG_SIZE]. Clear the log."
     fi
-
 }
 
 printMsg() {
@@ -69,7 +76,7 @@ printMsg() {
 
 getIp() {
 #    curl -s http://checkip.dyndns.com | sed -n 's/.*: \([0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\).*/\1/p'
-    curl -s whatismyip.akamai.com
+    eval $command
 }
 
 execAPI() {
@@ -142,6 +149,7 @@ execSvc() {
 
 execUpdate() {
     local ip=`getIp`
+    printMsg "WAN IP: ${ip}"
     updateRecord $ip
 }
 
@@ -151,9 +159,11 @@ case $1 in
         clearLog;
         printMsg "Start in Service mode, check in every $wait seconds";
         printMsg "domain: ${domain}, sub_domain: ${sub_domain}";
+        printMsg "Use command: [$command] to get wan ip";
         execSvc;;
     *)
         is_svc=0;
         printMsg "Start update record, domain: ${domain}, sub_domain: ${sub_domain}";
+        printMsg "Use command: [$command] to get wan ip";
         execUpdate;;
 esac

package/lean/luci-app-dnspod/files/root/etc/config/dnspod

@@ -3,4 +3,5 @@ config base_arg "base_arg"
 	option sub_domain ''
 	option login_token ''
 	option wait_second ''
+	option command_to_get_ip 'curl -s whatismyip.akamai.com'
 

package/lean/luci-app-dnspod/files/root/usr/lib/lua/luci/model/cbi/dnspod.lua

@@ -22,6 +22,7 @@ email = s:option(Value, "login_token", translate("DNSPOD Token"), "格式: ID,To
 main = s:option(Value, "main_domain", translate("主域名"), "想要解析的主域名，例如:baidu.com")
 sub = s:option(Value, "sub_domain", translate("子域名"), "想要解析的子域名，只允许填写一个。如果想解析*子域名，请填写 \\*")
 wait = s:option(Value, "wait_second", translate("更新周期(s)"), "请填写数字，默认为300s")
+command = s:option(Value, "command_to_get_ip", translate("外网ip获取命令"), "默认为 curl -s whatismyip.akamai.com")
 
 local apply = luci.http.formvalue("cbi.apply")
 if apply then