从Rails的3.0.3 URL反向转义的特殊字符正确 [英] Unescape special characters correctly from the URL in Rails 3.0.3

问题描述

我用Rails 3.0.3与REE（红宝石1.8.7）和创业板mysql2，0.2.6

I'm using Rails 3.0.3 with REE ( Ruby 1.8.7 ) and gem 'mysql2', '0.2.6'

有一个在我的项目中的搜索功能，使人们使用URL或使用表单使用GET方法，然后生成的URL。

There's a search feature in my project that enable people to use the GET method using URL or using forms and then generate the URL.

示例：

我要搜索：

产地城市：奥胡斯，丹麦城市和目的地城市：巴拉圭亚松森

origin city: "Århus, Denmark" and destination city: "Asunción, Paraguay"

他们都有一个特殊字符： 和 0 ，这样的URL将这样产生的，当有人点击搜索按钮。

they both have a special character: "Å" and "ó", so the URL will be generated like this when someone click the search button.

?&origin=%C5rhus%2C%20Denmark&destination=Asunci%F3n%2C%20Paraguay

问题：

当我寻找那个城市，它不是像转义我想（我尝试使用如CGI，URI，甚至一些宝石）。

When i search that city, it's not unescaped like i want ( i tried using like CGI, URI, even some gems).

当我在控制台上看到，ActiveRecord的接受查询是这样的：

When i see at the console, ActiveRecord received the query like this:

Parameters: {"destination"=>"Asunci�n, Paraguay", "origin"=>"�rhus, Denmark", "sort"=>"newest"}
City Load (0.1ms)  SELECT `cities`.* FROM `cities` WHERE (`cities`.`name` = '�rhus') ORDER BY cities.name ASC
City Load (6.8ms)  SELECT `cities`.* FROM `cities` WHERE (`cities`.`name` = 'Asunci�n, Paraguay') ORDER BY cities.name ASC

结论：在城市无法找到的：（

不过，我发现了一个有趣的事情：

But, i found an interesting thing:

• 当我作出asociated使用此功能的文件中存在错误，输出将是这样的：

• When i made an error on the file asociated with this function, the output will be like this :

要求

Parameters:
{"destination"=>"Asunción,
Paraguay",
"origin"=>"Århus,
Denmark",
"sort"=>"newest"}

这是一个有效的！

问：

你们是否有一个想法如何解决此问题？在此先感谢：）

Do you guys have an idea how to solve this? Thanks in advance :)

推荐答案

您说得对，它看起来像你有一个编码问题的地方。该0xC5人物是A，在 ISO-8859-1（AKA拉丁-1），在UTF -8这将是％C3％85 在URL中。

You're right, it looks like you have an encoding problem somewhere. The 0xC5 character is "Å" in ISO-8859-1 (AKA Latin-1), in UTF-8 it would be %C3%85 in the URL.

我怀疑你是使用JavaScript在客户端和JavaScript是使用的旧逃跑 功能打造的URL，逃跑与非ASCII字符的一些问题。如果是这样的话，那么你应该升级你的JavaScript使用<一个href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/en$c$cURIComponent"><$c$c>en$c$cURIComponent代替。看一看这个小演示，你就会明白我说的：

I suspect that you're using JavaScript on the client side and that your JavaScript is using the old escape function to build the URL, escape has some issues with non-ASCII characters. If this is the case, then you should upgrade your JavaScript to use encodeURIComponent instead. Have a look at this little demo and you'll see what I'm talking about:

http://jsfiddle.net/ambiguous/U5A3k/

如果您不能更改的客户端脚本，那么你可以做到这一点用在Ruby中艰难地<一href="http://ruby-doc.org/core-1.9.3/String.html#method-i-force_encoding"><$c$c>force_encoding和 编码 ：

If you can't change the client-side script then you can do it the hard way in Ruby using force_encoding and encoding:

>> s = CGI.unescape('%C5rhus%2C%20Denmark')
=> "\xC5rhus, Denmark"
>> s.encoding
=> #<Encoding:UTF-8>
>> s.force_encoding('iso-8859-1')
=> "\xC5rhus, Denmark"
>> s.encoding
=> #<Encoding:ISO-8859-1>
>> s.encode!('utf-8')
=> "Århus, Denmark"
>> s.encoding
=> #<Encoding:UTF-8>

您应该得到类似\ xC5rhus，丹麦从 PARAMS ，你可以unmangle与

You should get something like "\xC5rhus, Denmark" from params and you could unmangle that with:

s = params[:whatever].force_encoding('iso-8859-1').encode('utf-8')

这个服务器端处理将是最后的手段不过，如果您的客户端code被发回正确连接codeD的数据，那么你会留下一堆猜测的服务器上找出编码实际使用获得为URL。

Dealing with this on the server side would be a last resort though, if your client-side code is sending back incorrectly encoded data then you'll be left with a pile of guesswork on the server to figure out what encoding was actually used to get it into the URL.

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