URL 重写、SEO 和编码
我发现这个 关于 URL 重写的文章最有用。 但这里有几个问题。
我想使用 URL（在重写之前，查询字符串中包含空格）
http://www.store.com/products.aspx?category=CD s-Dvd s
首先，我是否应该出于任何原因用加号 (+) 替换空格？像这样：
http://www.store.com/products.aspx?category=CD+s-Dvd+s
其次，我的母语是希腊语。我应该对参数进行编码吗？一般来说，对于 SEO 而言，启用 URL 编码的结果会有所不同吗？
I found this article regarding URL Rewriting most useful.
But here are a couple of questions.
I would love to use a URL (before rewriting, with spaces inside the query string)
http://www.store.com/products.aspx?category=CD s-Dvd s
First of all, should I replace the spaces with the plus sign (+) for any reason? Like this:
http://www.store.com/products.aspx?category=CD+s-Dvd+s
Secondly, my native language is Greek. Should I encode the parameters? Generally speaking, would the result with URL encoding on be different, regarding S.E.O.?
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实际上你应该用连字符替换空格。这实际上比使用下划线更有利于搜索引擎优化。
Actually you should replace spaces with hyphens. That actually is better for SEO than using an underscore.
如果值必须保持不变，那么您必须使用转义。 URL查询参数值中的空格可以编码为
+或%20。只要外部版本拼写正确，mod_rewrite 通常就会为您执行此操作。在 URL 的外部版本中，只能使用 %20：
因为 URL 路径部分中的
+字面意思是加号。（您确定要在那里有一个空格吗？不带空格的“CD-DVD”似乎是一个更好的标题。）
从路径部分到参数获取任意字符串并非易事。除了转义问题之外，您还遇到
/问题，它应该在路径部分中编码为%2F。但是，出于安全原因，Apache 默认情况下会阻止任何包含%2F的 URL。 （\在 Windows 下同样受到影响。）您可以使用AllowEncodedSlashes配置关闭此行为，但这意味着如果您想要便携，则不能使用“CD” /DVDs”作为类别名称。出于这个原因，并且因为在 URL 中加载
%20有点难看，所以字符串在放入 URL 之前通常会转换为“slugs”，其中所有有争议的 ASCII 字符都被转换为“slugs”。将导致可见的 %-转义符被替换为填充字符，例如连字符或下划线。这确实意味着您无法往返字符串，因此您需要在数据库中存储单独的标题和 slug，以便能够查找给定 slug 的正确实体，或者仅在 URL 中使用附加 ID （就像堆栈溢出一样）。If the value must come through unaltered, then yes you must use escaping. In a URL query parameter value, a space may be encoded as
+or%20. mod_rewrite will generally do this for you as long as the external version was suitably spelled.In the external version of the URL, only %20 can be used:
because a
+in a URL path part would literally mean a plus.(Are you sure you want a space there? “CDs-DVDs” without the spaces would seem to be a better title.)
It is non-trivial to get arbitrary strings through from a path part to a parameter. Apart from the escaping issues, you've got problems with
/, which should be encoded as%2Fin a path part. However Apache will by default block any URL containing%2Ffor security reasons. (\is similarly affected under Windows.) You can turn this behaviour off using theAllowEncodedSlashesconfig, but it means if you want to be portable you can't use “CDs/DVDs” as a category name.For this reason, and because having a load of
%20s in your URL is a bit ugly, strings are usually turned into ‘slugs’ before being put in a URL, where all the contentious ASCII characters that would result in visible %-escapes are replaced with filler characters such as hyphen or underscore. This does mean you can't round-trip the string, so you need to store either a separate title and slug in the database to be able to look up the right entity for a given slug, or just use an additional ID in the URL (like Stack Overflow does).一般做法是用下划线替换空格，ala
http://www.store.com/products.aspx?category=CD_s-Dvd_sGeneral practice is to replace spaces with underscores, ala
http://www.store.com/products.aspx?category=CD_s-Dvd_s