blocks|key|232953|text|根据here上的回答：str='foo%2520%255B12%255D'编码foo+[12]|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|232954|%2520+is+space
%2522+is+quotes
%255B+is+'['
and+%255D+is+']'|code-block|syntax|javascript|232955|这称为percent+encoding，用于对url参数值中的特殊字符进行编码。|232956|编辑顺便说一下，当我读https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/encodeURI#Description的时候，我突然想到为什么这么多人都在做同样的搜索。请参阅页面底部的注释：|BOLD|232957|232958|还注意到，如果一个人希望遵循URL的最新RFC3986，将方括号保留(用于IPv6)，从而在形成可能是URL的一部分(如主机)的内容时不进行编码，下面的方法可能会有所帮助。|blockquote|232959|232960|232961|function+fixedEncodeURI+(str)+{
++++return+encodeURI(str).replace(/%255B/g,+'[').replace(/%255D/g,+']');
}|232962|希望这能帮助人们在遇到这个问题时解决他们的问题。|232963|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/5082400/1108032|1|http://en.wikipedia.org/wiki/Percent-encoding|2|https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/encodeURI#Description|3|http://tools.ietf.org/pdf/rfc3986.pdf^0|B|K|X|8|2|4|0|0|0|3|G|1|0|0|2|B|2Q|2|0|0|K|7|3|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1D|8|@$9|1E|A|1F|B|C]|$9|1G|A|1H|B|C]]|D|@$9|1I|A|1J|1|1K]]|E|$]]|$1|F|3|G|5|H|7|1L|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1M|8|@]|D|@$9|1N|A|1O|1|1P]]|E|$]]|$1|M|3|N|5|6|7|1Q|8|@$9|1R|A|1S|B|O]]|D|@$9|1T|A|1U|1|1V]]|E|$]]|$1|P|3|-4|5|6|7|1W|8|@]|D|@]|E|$]]|$1|Q|3|R|5|S|7|1X|8|@]|D|@$9|1Y|A|1Z|1|20]]|E|$]]|$1|T|3|-4|5|6|7|21|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|22|8|@]|D|@]|E|$]]|$1|V|3|W|5|H|7|23|8|@]|D|@]|E|$I|J]]|$1|X|3|Y|5|6|7|24|8|@]|D|@]|E|$]]|$1|Z|3|-4|5|6|7|25|8|@]|D|@]|E|$]]]|10|$11|$5|12|13|14|E|$15|16]]|17|$5|12|13|14|E|$15|18]]|19|$5|12|13|14|E|$15|1A]]|1B|$5|12|13|14|E|$15|1C]]]]

As per this answer over <a href="https://stackoverflow.com/a/5082400/1108032">here</a>: <code>str='foo%20%5B12%5D'</code> encodes <code>foo [12]</code>:
<pre><code>%20 is space
%22 is quotes
%5B is '['
and %5D is ']'
</code></pre>
This is called <a href="http://en.wikipedia.org/wiki/Percent-encoding" rel="noreferrer">percent encoding</a> and is used in encoding special characters in the url parameter values.
EDIT By the way as I was reading <a href="https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/encodeURI#Description" rel="noreferrer">https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/encodeURI#Description</a>, it just occurred to me why so many people make the same search. See the note on the bottom of the page:
<blockquote>
Also note that if one wishes to follow the more recent <a href="http://tools.ietf.org/pdf/rfc3986.pdf" rel="noreferrer">RFC3986</a>
for URL's, making square brackets reserved (for IPv6) and thus not
encoded when forming something which could be part of a URL (such as a
host), the following may help.
</blockquote>
<pre><code>function fixedEncodeURI (str) {
 return encodeURI(str).replace(/%5B/g, '[').replace(/%5D/g, ']');
}
</code></pre>
Hopefully this will help people sort out their problems when they stumble upon this question.

blocks|key|230105|text|它们代表[和]。这种编码称为"URL+encoding"。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|230106|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Percent-encoding^0|4|1|6|1|E|E|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]]|E|$]]|$1|F|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

They represent <code>[</code> and <code>]</code>. The encoding is called <a href="http://en.wikipedia.org/wiki/Percent-encoding" rel="noreferrer">"URL encoding"</a>.

blocks|key|230121|text|在URL编码时，[]会被%255B%255D替换。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|230122|entityMap^0|8|2|C|6|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

<code>[]</code> is replaced by <code>%5B%5D</code> at URL encoding time.

blocks|key|3107975|text|这是通常的url+encoding|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3107976|因此，它们分别代表[、]|style|CODE|3107977|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Url_encoding^0|5|C|0|0|9|1|B|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@$A|U|B|V|F|G]|$A|W|B|X|F|G]]|9|@]|C|$]]|$1|H|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

Well it's the usual <a href="http://en.wikipedia.org/wiki/Url_encoding" rel="noreferrer">url encoding</a> 

So they stand for <code>[</code>, respectively <code>]</code>

blocks|key|233992|text|要找到这些值，只需在浏览器中使用Console并执行以下操作|type|unstyled|depth|inlineStyleRanges|entityRanges|data|233993|​|233994|console.log(decodeURI('user%255Blogin%255D=username&user%255Bpassword%255D=123456'))|code-block|syntax|javascript|233995|233996|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|N|8|@]|9|@]|A|$G|H]]|$1|I|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|P|8|@]|9|@]|A|$]]]|K|$]]

To find out these values you can simply use Console in your browser and do the following
<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>console.log(decodeURI('user%5Blogin%5D=username&amp;user%5Bpassword%5D=123456'))</code></pre>
</div>
</div>

blocks|key|2894249|text|要快速了解一下，您可以使用this+online+tool进行百分号编码/解码。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2894250|entityMap|0|LINK|mutability|MUTABLE|url|http://www.url-encode-decode.com/^0|D|G|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

To take a quick look, you can percent-en/decode using <a href="http://www.url-encode-decode.com" rel="nofollow">this online tool</a>.

blocks|key|2894234|text|数据可能最初是从web表单发布的，看起来有点像这样(但可能要复杂得多)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2894235|<form+action="http://example.com"+method="post">

++User+login++++<input+name="user[login]"++++/><br+/>
++User+password+<input+name="user[password]"+/><br+/>

++<input+type="submit"+/>
</form>|code-block|syntax|javascript|2894236|如果方法是"get“而不是"post"，单击submit按钮将转到一个类似以下内容的URL：|2894237|2894238|+http://example.com/?user%255Blogin%255D=username&user%255Bpassword%255D=123456|blockquote|offset|length|2894239|2894240|2894241|或者：|2894242|2894243|+http://example.com/?user[login]=username&user[password]=123456|2894244|2894245|2894246|另一端的web服务器可能会接受user[login]和user[password]参数，并将它们转换为一个user对象，其中包含包含这些值的login和password字段。|style|CODE|2894247|entityMap|0|LINK|mutability|MUTABLE|url|http://example.com/?user%255Blogin%255D=username&user%255Bpassword%255D=123456|1|http://example.com/?user[login]=username&user[password]=123456^0|0|0|0|0|1|1Y|0|0|0|0|0|0|1|1Q|1|0|0|0|F|B|R|E|1H|4|1Y|5|24|8|0^^$0|@$1|2|3|4|5|6|7|1B|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1C|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1D|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|1F|8|@]|9|@$M|1G|N|1H|1|1I]]|A|$]]|$1|O|3|-4|5|6|7|1J|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|1K|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1L|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]|$1|T|3|U|5|L|7|1N|8|@]|9|@$M|1O|N|1P|1|1Q]]|A|$]]|$1|V|3|-4|5|6|7|1R|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1S|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|1T|8|@$M|1U|N|1V|Z|10]|$M|1W|N|1X|Z|10]|$M|1Y|N|1Z|Z|10]|$M|20|N|21|Z|10]|$M|22|N|23|Z|10]]|9|@]|A|$]]|$1|11|3|-4|5|6|7|24|8|@]|9|@]|A|$]]]|12|$13|$5|14|15|16|A|$17|18]]|19|$5|14|15|16|A|$17|1A]]]]

The data would probably have been posted originally from a web form looking a bit like this (but probably much more complicated):

<pre><code>&lt;form action="http://example.com" method="post"&gt;

 User login &lt;input name="user[login]" /&gt;&lt;br /&gt;
 User password &lt;input name="user[password]" /&gt;&lt;br /&gt;

 &lt;input type="submit" /&gt;
&lt;/form&gt;
</code></pre>

If the method were "get" instead of "post", clicking the submit button would take you to a URL looking a bit like this:

<blockquote>
 <a href="http://example.com/?user%5Blogin%5D=username&amp;user%5Bpassword%5D=123456" rel="nofollow">http://example.com/?user%5Blogin%5D=username&amp;user%5Bpassword%5D=123456</a>
</blockquote>

or:

<blockquote>
 <a href="http://example.com/?user[login]=username&amp;user[password]=123456" rel="nofollow">http://example.com/?user[login]=username&amp;user[password]=123456</a>
</blockquote>

The web server on the other end will likely take the <code>user[login]</code> and <code>user[password]</code> parameters, and make them into a <code>user</code> object with <code>login</code> and <code>password</code> fields containing those values.

blocks|key|3108028|text|重要的是为什么这些符号出现在url中。请参阅https://www.php.net/manual/en/function.parse-str.php#76792，特别是：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3108029|parse_str('foo[]=1&foo[]=2&foo[]=3',+$bar);|code-block|syntax|javascript|3108030|上面的结果是：|3108031|$bar+=+['foo'+=>+['1',+'2',+'3']+];|3108032|在数组中分隔查询变量的方法是什么(至少在php中是这样)。|3108033|entityMap|0|LINK|mutability|MUTABLE|url|https://www.php.net/manual/en/function.parse-str.php#76792^0|M|1M|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|12|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

Not least important is why these symbols occur in url.
See <a href="https://www.php.net/manual/en/function.parse-str.php#76792" rel="nofollow noreferrer">https://www.php.net/manual/en/function.parse-str.php#76792</a>, specifically:

<pre><code>parse_str('foo[]=1&amp;foo[]=2&amp;foo[]=3', $bar);
</code></pre>

the above produces:

<pre><code>$bar = ['foo' =&gt; ['1', '2', '3'] ];
</code></pre>

and what is THE method to separate query vars in arrays (in php, at least).

I'm trying to write a Java class to log in to a certain website. The data sent in the POST request to log in is
<code>user%5Blogin%5D=username&amp;user%5Bpassword%5D=123456</code>
I'm curious what the <code>%5B</code> and <code>%5D</code> means in the key user login.
How do I decode these data?

What does %5B and %5D in POST requests stand for?

服务器

Java

我正在尝试编写一个Java类来登录到某个网站。在POST登录请求中发送的数据为user%5Blogin%5D=username&user%5Bpassword%5D=123456我很好奇key 用户登录中的%5B和%5D是什么意思。如何解码这些数据？

问POST请求中的%5B和%5D代表什么？
EN

回答 8

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问POST请求中的%5B和%5D代表什么？EN

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问POST请求中的%5B和%5D代表什么？
EN