我需要在我的应用程序中请求以下URL:
http://feedbooks.com/type/Crime%2FMystery/books/top
当我运行以下代码时:
Uri myUri = new Uri("http://feedbooks.com/type/Crime%2FMystery/books/top");
Uri
构造函数将%2F
解码为文字/
,我收到404错误,因为它已将网址更改为:
http://feedbooks.com/type/Crime/Mystery/books/top
Uri
类有一个带参数dontEscape
的构造函数,但不推荐使用该构造函数并将其设置为true
无效。
我的第一个想法是做类似的事情:
Uri myUri = new Uri("http://feedbooks.com/type/Crime%252FMystery/books/top");
希望它会将%25
转换为文字%
,但这也不起作用。
如何在.NET中为此特定URL创建正确的Uri
对象?
答案 0 :(得分:7)
在.NET 4.0中它更容易一些。您可以在配置文件中设置如下设置:
<uri>
<schemeSettings>
<add name="http" genericUriParserOptions="DontUnescapePathDotsAndSlashes" />
</schemeSettings>
</uri>
它仅适用于'http'和'https'方案。
或者这是LeaveDotsAndSlashesEscaped方法的新版本。它不需要特定的Uri实例,只需在应用程序启动时调用它:
private void LeaveDotsAndSlashesEscaped()
{
var getSyntaxMethod =
typeof (UriParser).GetMethod("GetSyntax", BindingFlags.Static | BindingFlags.NonPublic);
if (getSyntaxMethod == null)
{
throw new MissingMethodException("UriParser", "GetSyntax");
}
var uriParser = getSyntaxMethod.Invoke(null, new object[] { "http" });
var setUpdatableFlagsMethod =
uriParser.GetType().GetMethod("SetUpdatableFlags", BindingFlags.Instance | BindingFlags.NonPublic);
if (setUpdatableFlagsMethod == null)
{
throw new MissingMethodException("UriParser", "SetUpdatableFlags");
}
setUpdatableFlagsMethod.Invoke(uriParser, new object[] {0});
}
答案 1 :(得分:6)
我使用2.0 ...
遇到了同样的问题我在this blog发现了一个解决方法:
// System.UriSyntaxFlags is internal, so let's duplicate the flag privately
private const int UnEscapeDotsAndSlashes = 0x2000000;
public static void LeaveDotsAndSlashesEscaped(Uri uri)
{
if (uri == null)
{
throw new ArgumentNullException("uri");
}
FieldInfo fieldInfo = uri.GetType().GetField("m_Syntax", BindingFlags.Instance | BindingFlags.NonPublic);
if (fieldInfo == null)
{
throw new MissingFieldException("'m_Syntax' field not found");
}
object uriParser = fieldInfo.GetValue(uri);
fieldInfo = typeof(UriParser).GetField("m_Flags", BindingFlags.Instance | BindingFlags.NonPublic);
if (fieldInfo == null)
{
throw new MissingFieldException("'m_Flags' field not found");
}
object uriSyntaxFlags = fieldInfo.GetValue(uriParser);
// Clear the flag that we don't want
uriSyntaxFlags = (int)uriSyntaxFlags & ~UnEscapeDotsAndSlashes;
fieldInfo.SetValue(uriParser, uriSyntaxFlags);
}
效果很好。
希望这会有所帮助(迟到总比没有好!)
答案 2 :(得分:2)
这是bug我提出了一段时间。它应该在4.0中修复,但我没有屏住呼吸。显然它仍然是RC中的一个问题。
答案 3 :(得分:1)
通过结合前面的2个答案,您可以使用一种方法,只需在.net 4和.net 3.5上运行的每个进程调用一次。
// System.UriSyntaxFlags is internal, so let's duplicate the flag privately
private const int UnEscapeDotsAndSlashes = 0x2000000;
private void LeaveDotsAndSlashesEscaped()
{
var getSyntaxMethod =
typeof (UriParser).GetMethod("GetSyntax", BindingFlags.Static | BindingFlags.NonPublic);
if (getSyntaxMethod == null)
{
throw new MissingMethodException("UriParser", "GetSyntax");
}
var uriParser = getSyntaxMethod.Invoke(null, new object[] { "http" });
FieldInfo flagsFieldInfo = typeof(UriParser).GetField("m_Flags", BindingFlags.NonPublic | BindingFlags.GetField | BindingFlags.SetField | BindingFlags.Instance);
if (flagsFieldInfo == null)
{
throw new MissingFieldException("UriParser", "m_Flags");
}
int flags = (int) flagsFieldInfo.GetValue(uriParser);
// unset UnEscapeDotsAndSlashes flag and leave the others untouched
flags = flags & ~UnEscapeDotsAndSlashes;
flagsFieldInfo.SetValue(uriParser, flags);
}