System.Uri和编码的冒号（:) [英] System.Uri and encoded colon (:)

问题描述

在.Net 4.5之前，似乎System.Uri会取消对已编码的斜杠进行编码，但是此问题已得到修复。参考： https://stackoverflow.com/a/20733619/188740

Before .Net 4.5, it seems that System.Uri would unencode encoded slashes, but this has since been fixed. Reference: https://stackoverflow.com/a/20733619/188740

我在冒号时遇到了同样的问题。 System.Uri仍未对编码的冒号进行编码。示例：

I'm encountering the same problem with colons. System.Uri still unencodes encoded colons. Example:

        var uri = new Uri("http://www.example.com/?foo=http%3A%2F%2Fwww.example.com");
        var s = uri.ToString(); //http://www.example.com/?foo=http:%2F%2Fwww.example.com

请注意，System.Uri如何将％3A 切换回：。这是错误吗？最好的解决方法是什么？

Notice how %3A gets switched back to : by System.Uri. Is this a bug? What's the best workaround?

推荐答案

如何改用 Uri.AbsoluteUri ？

var s = uri.AbsoluteUri; 
// http://www.example.com/?foo=http%3A%2F%2Fwww.example.com

根据源代码， uri.ToString（）看起来具有取消某些部分可见的逻辑，这可以从此处而 .AbsoluteUri 实现。

As per the source, uri.ToString() looks like it has logic to unescape certain parts which can be seen here whereas .AbsoluteUri has a much simpler implementation.

Uri.ToString（）

根据 System.Uri.ToString（） ：

一个String实例，其中包含Uri实例的未转义规范表示。除＃、?和％外，所有字符均未转义。

A String instance that contains the unescaped canonical representation of the Uri instance. All characters are unescaped except #, ?, and %.

但是，根据示例并在尝试了更多字符串之后，它看起来实际的实现有点像'仅：， * 和 不转义'

However as per the example and after trying out a few more strings, it looks like the actual implementation is somwhat like 'Only :, * and spaces are unescaped'

%3A (:) // gets unescaped
%20 ( ) // gets unescaped 
%2A (*) // gets unescaped

%2b, %26, %23, %24, %25 (+, &, #, $, %) // Remain as-is (escaped)

其他链接

• System.Uri.AbsoluteUri

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