关于DDNS日志输出中文问题

最近在使用 OpenWrt 的 DDNS 发现，如果使用 write_log 来实现日志输出，中文不会显示出来，会出现格式错误。对 dynamic_dns_functions.sh 的源代码进行细读发现，write_log() 函数会调用 urlencode() 函数，而该函数是不支持中文的。

对该函数改为支持中文的URL编码即可，将 urlencode(){} 改写代码如下：

注：dynamic_dns_functions.sh 文件地址一般为 /usr/lib/ddns/

dynamic_dns_functions.sh

urlencode() {
local __ENC
[ $# -ne 2 ] && write_log 12 "Error calling 'urlencode()' - wrong number of parameters"
__ENC=$(echo "$2"  awk 'BEGIN {
        split ("1 2 3 4 5 6 7 8 9 A B C D E F", hextab, " ")
        hextab [0] = 0
        for (i=1; i<=255; ++i) {
            ord [ sprintf ("%c", i) "" ] = i + 0
        }
    }
    {
        encoded = ""
        for (i=1; i<=length($0); ++i) {
            c = substr ($0, i, 1)
            if ( c ~ /[a-zA-Z0-9.-]/ ) {
                encoded = encoded c             # safe character
            } else if ( c == " " ) {
                encoded = encoded "+"   # special handling
            } else {
                # unsafe character, encode it as a two-digit hex-number
                lo = ord [c] % 16
                hi = int (ord [c] / 16);
                encoded = encoded "%" hextab [hi] hextab [lo]
            }
        }
        print encoded
    }')
eval "$1=\"$__ENC\""
return 0
}