URL编码 :
## URLencode2 = function( str = '' )
a = URLencode( iconv( str, to = 'utf8', toRaw = F ) )
a就是编码后的字符串
解码 加载 urltools 包
b = urltools::url_decode( 编码后的字符串 )
Encoding( b) = 'UTF-8'
b 就是解码后的字符串