http 除了 302，为什么 200 也可以实现浏览器跳转？

TypeErrorNone · 2017-04-27T16:14:12Z

例如知乎外链的跳转地址： https://link.zhihu.com/?target=https://www.baidu.com 请问是怎么实现的？这是 link.zhihu.com 的响应内容

img

知乎

src

请问

19 replies • 2017-04-28 18:10:44 +08:00

1

TypeErrorNone

OP

Apr 28, 2017

<img src="https://segmentfault.com/img/bVMSpl" />
这是 link.zhihu.com 的响应

2

gracece

Apr 28, 2017

~ curl 'https://link.zhihu.com/?target=https://www.baidu.com'
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="renderer" content="webkit">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"/>
<link rel="shortcut icon" href="https://static.zhihu.com/static/favicon.ico" type="image/x-icon">
<title>跳转中...</title>
</head>
<script>
var URI = "https%3A%2F%2Fwww.baidu.com";
window.location.href=decodeURIComponent(URI);
</script>
</html>

3

wwqgtxx

Apr 28, 2017

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="renderer" content="webkit">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"/>
<link rel="shortcut icon" href="https://static.zhihu.com/static/favicon.ico" type="image/x-icon">
<title>跳转中...</title>
</head>
<script>
var URI = "https%3A%2F%2Fwww.baidu.com";
window.location.href=decodeURIComponent(URI);
</script>
</html>

4

huangtao728

Apr 28, 2017 via Android

可以跳转的原因见楼上
我猜知乎用 200 来跳转而不是 302 是因为 302 不易缓存吧

5

lmaq

Apr 28, 2017

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="renderer" content="webkit">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"/>
<link rel="shortcut icon" href="https://static.zhihu.com/static/favicon.ico" type="image/x-icon">
<title>跳转中...</title>
</head>
<script>
var URI = "https%3A%2F%2Fwww.baidu.com";
window.location.href=decodeURIComponent(URI);
</script>
</html>