Internet相关 URL编码

互联网相关 URL编码
互联网 URL

按照标准，URL中只能出现US-ASCII字符，假如有其它类型的字符，必须对其进行URL编码

URL encode规则：

把 URL 转成 application/x-www-form-urlencoded MIME格式,标准 http://www.ietf.org/rfc/rfc1738.txt

所有 大小写英文字母 ， 数字都通过，不需要转码“-”,"_",".","!","~","*","","(",")" 不需要转码",","/","?",":","@","&","=","+","$","," 必须转码空格变成 "+"编码规则是 char 变成 "%**"规则1，2和3的冲突，你可以根据1，2或者3，应该都work

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