Server.URLEncode开始用加号("+")代替百分号20(“％20")的空白 [英] Server.URLEncode started to replace blank with plus ("+") instead of percent-20 ("%20")

问题描述

给出这段代码:

<%
    Response.Write Server.URLEncode("a doc file.asp")
%>

它会输出一段时间(例如Javascript调用 encodeURI ):

It output this for a while (like Javascript call encodeURI):

a%20doc%20file.asp

现在，由于未知原因，我得到:

Now, for unknow reason, I get:

a+doc+file%2Easp

我不确定要实现此目标的方式(可能是编码ANSI/UTF-8的文件内容).为什么会发生这种情况?如何获得 Server.URLEncode 的第一个行为，即使用百分比编码?

I'm not sure of what I touched to make this happen (maybe the file content encoding ANSI/UTF-8). Why did this happen and how can I get the first behavior of Server.URLEncode, ie using a percent encoding?

推荐答案

经典ASP已有近20年没有更新，因此 Server.URLEncode 仍使用

Classic ASP hasn't been updated in nearly 20 years, so Server.URLEncode still uses the RFC-1866 standard, which specifies spaces be encoded as + symbols (which is a hangover from an old application/x-www-form-urlencoded media type), you must be mistaken in thinking it was encoding spaces as %20 at some point, not unless there's an IIS setting you can change that I'm unaware of.

更多现代语言使用 RFC-3986 标准对URL进行编码，这就是Javascript的原因 encodeURI 函数返回编码为％20 的空格.

More modern languages use the RFC-3986 standard for encoding URLs, which is why Javascript's encodeURI function returns spaces encoded as %20.

+ 和％20 在被任何浏览器解码时应完全相同，但是通常认为最好使用％20 ，因为它是目前最现代的标准，因此对URL中的空格进行编码时，某些解码功能(例如Javascript的 decodeURIComponent )不会将 + 符号识别为空格，将无法正确解码在％20 上使用它们的URL.

Both + and %20 should be treated exactly the same when decoded by any browser thanks to RFC backwards compatibility, but it's generally considered best to use %20 when encoding spaces in a URL as it's the more modern standard now, and some decoding functions (such as Javascript's decodeURIComponent) won't recognise + symbols as spaces and will fail to properly decode URLs that use them over %20.

您始终可以使用自定义函数将空格编码为％20 :

You can always use a custom function to encode spaces as %20:

function URL_encode(ByVal url)

    url = Server.URLEncode(url)
    url = replace(url,"+","%20")

    URL_encode = url

end function

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