如何POST到HTTPs？

Question

假设我有一个形式，现在正在做一个帖子：

<form id="post-form" class="post-form" 
     action="https://stackoverflow.com/questions/ask/submit" method="post"> 

你会发现没有网站在action，浏览器遵循它从得到的页面。

浏览器发布

If the current page is...    then the browser will POST to 
======================================= ============= 
http://stackoverflow.com/questions/ask http://stackoverflow.com/questions/ask/submit 
https://stackoverflow.com/questions/ask https://stackoverflow.com/questions/ask/submit 

时遵循当前域规则，但我要确保浏览器会经常去安全页：

http://stackoverflow.com/questions/ask https://stackoverflow.com/questions/ask/submit 

通常你会尝试类似：

<form id="post-form" class="post-form" 
     action="https://stackoverflow.com/questions/ask/submit" method="post"> 

除t帽子需要知道托管站点的域和虚拟路径名（例如， stackoverflow.com）。如果网站发生了变化：

• stackoverflow.net
• stackoverflow.com/mobile
• de.stackoverflow.com
• stackoverflow.co.uk/fr
• beta.stackoverflow.com

然后形式action将不得不还更新：

<form id="post-form" class="post-form" action="https://stackoverflow.net/questions/ask/submit" method="post"> 

<form id="post-form" class="post-form" action="https://stackoverflow.com/mobile/questions/ask/submit" method="post"> 

<form id="post-form" class="post-form" action="https://de.stackoverflow.com/questions/ask/submit" method="post"> 

<form id="post-form" class="post-form" action="https://stackoverflow.co.uk/fr/questions/ask/submit" method="post"> 

<form id="post-form" class="post-form" action="https://beta.stackoverflow.com/questions/ask/submit" method="post"> 

如何指导浏览器去https版本的页面？

---

假设语法：

<form id="post-form" class="post-form" action="https://./questions/ask/submit" method="post"> 

Answer 1

您可以用JavaScript改变形式的行动：

var form = document.getElementById("post-form"); 
form.action = location.href.replace(/^http:/, 'https:'); 

但也有一些security considerations，我会建议你到表单中的URL重定向到HTTPS。虽然你可以从JavaScript做到这一点，但当它达到安全性时，你绝对不应该信任javascript，所以从服务器（它也更快，页面不必加载，只有http头）不会信任JavaScript。