Firefox和Chrome POST期间与CR + LF替换LF [英] Firefox and Chrome replacing LF with CR+LF during POST
问题描述
为什么Firefox和Chrome取代POST过程中与CR + LF一个LF？
我写了下面作为一个测试：
＆LT; HTML和GT;
＆LT; HEAD＆GT;
＆所述; SCRIPT SRC =https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.js＆GT;＆下; /脚本＆GT;
＆LT;脚本类型=文/ JavaScript的＆GT;
功能lftest（）
{
VAR换行符=之前;
换行+ = String.fromChar code（10）; //换行
换行+ =后面;
$（＃场）VAL（换行）。
$（＃formthing）提交（）。
}
＆LT; / SCRIPT＆GT;
＆LT; /头＆GT;＆LT;身体GT;
＆LT;表ID =formthing方法=邮报行动=http://someurl.com/resource＆GT;
＆LT;输入类型=隐藏ID =场值=NAME =行/＆GT;
＆LT; A HREF =＃的onclick =lftest（）＆GT;发＆LT; / A＆GT;
＆LT; /表及GT;
＆LT; /身体GT;
＆LT; / HTML＆GT;
开发工具网络选项卡显示POST数据：
％0D％0Aafter前
原来，这与在X WWW的形式urlen codeD编码类型的事情。据规范：
非字母数字字符由％HH，百分号，代之以
两个十六进制数重新presenting字符的ASCII code。
订单符重新psented为CR LF对$ P $（即'0D％0A％'）Why does Firefox and Chrome replace the LF character with CR+LF during POST?
I wrote the following as a test:
<html> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.js"></script> <script type="text/javascript"> function lftest() { var linefeed = "before"; linefeed += String.fromCharCode(10); //linefeed linefeed += "after"; $("#field").val(linefeed); $("#formthing").submit(); } </script> </head> <body> <form id="formthing" method="post" action="http://someurl.com/resource"> <input type="hidden" id="field" value="" name="line" /> <a href="#" onclick="lftest()">send</a> </form> </body> </html>The developer tools network tab shows the POST data:
before%0D%0Aafter
解决方案Turns out that this has to do with the x-www-form-urlencoded encoding type. According to the spec:
Non-alphanumeric characters are replaced by '%HH', a percent sign and two hexadecimal digits representing the ASCII code of the character. Line breaks are represented as "CR LF" pairs (i.e., '%0D%0A').
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