在 C# 中使用片段解析相对 URI 引用答案

【问题标题】：Resolving relative URI references with fragments in C#在 C# 中使用片段解析相对 URI 引用
【发布时间】：2020-11-16 02:51:43
【问题描述】：

我正在尝试处理包含片段的相对引用。根据RFC 3986，这似乎是有效的：

relative-ref  = relative-part [ "?" query ] [ "#" fragment ]

但是，每次我尝试在 C# 中创建一个包含片段的 URI 时，片段字符都会被转义并包含在路径组件中：

using System;

namespace UriResolution
{
    public class Program
    {
        public static void Main()
        {
            var baseURI = new Uri(
                "/home/user/project-root/Base.item",
                UriKind.Absolute);
            var relative = new Uri("Relative.item#Fragment", UriKind.Relative);
            var directResolved = new Uri(baseURI, "Relative.item#Fragment");
            var joined = new Uri(baseURI, relative);
            Console.WriteLine($"Base: {baseURI}, Relative: {relative}");
            Console.WriteLine($"DirectResolved: {directResolved}, Fragment: {directResolved.Fragment}");
            Console.WriteLine($"Joined: {joined}, Fragment: {joined.Fragment}");
        }
    }
}

产量

Base: file:///home/user/project-root/Base.item, Relative: Relative.item#Fragment
DirectResolved: file:///home/user/project-root/Relative.item%23Fragment, Fragment: 
Joined: file:///home/user/project-root/Relative.item%23Fragment, Fragment:

我应该使用其他一些标准库功能吗？是否有一些第三方库被认为是事实上的大炮？

【问题讨论】：

标签： c# uri

【解决方案1】：

这似乎是从非 URI 文件路径构造的 URI 的限制。将 file:// 添加到基本 URI 使用的路径将允许按预期解析内容：

using System;

namespace UriResolution
{
    public class Program
    {
        public static void Main()
        {
            var baseURI = new Uri(
                "file:///home/user/project-root/Base.item",
                UriKind.Absolute);
            var relative = new Uri("Relative.item#Fragment", UriKind.Relative);
            var directResolved = new Uri(baseURI, "Relative.item#Fragment");
            var joined = new Uri(baseURI, relative);
            Console.WriteLine($"Base: {baseURI}, Relative: {relative}");
            Console.WriteLine($"DirectResolved: {directResolved}, Fragment: {directResolved.Fragment}");
            Console.WriteLine($"Joined: {joined}, Fragment: {joined.Fragment}");
        }
    }
}

产量

Base: file:///home/user/project-root/Base.item, Relative: Relative.item#Fragment
DirectResolved: file:///home/user/project-root/Relative.item#Fragment, Fragment: #Fragment
Joined: file:///home/user/project-root/Relative.item#Fragment, Fragment: #Fragment

【讨论】：