Path.Combine很方便,但是.NET框架中是否有类似的URL函数?
我正在寻找这样的语法:
Url.Combine("http://MyUrl.com/", "/Images/Image.jpg")
这将返回:
"http://MyUrl.com/Images/Image.jpg"
Path.Combine很方便,但是.NET框架中是否有类似的URL函数?
我正在寻找这样的语法:
Url.Combine("http://MyUrl.com/", "/Images/Image.jpg")
这将返回:
"http://MyUrl.com/Images/Image.jpg"
当前回答
如果您不想在ASP.NET Core(也在Microsoft.Owin中提供)中添加第三方依赖项(如Flurl)或创建自定义扩展方法,则可以使用PathString来构建URI路径。然后,可以使用URI和UriBuilder的组合创建完整的URI。
在这种情况下,应为:
new Uri(new UriBuilder("http", "MyUrl.com").Uri, new PathString("/Images").Add("/Image.jpg").ToString())
这提供了所有组成部分,而无需在基URL中指定分隔符。不幸的是,PathString要求在每个字符串前面加上/,否则它实际上会引发ArgumentException!但至少您可以以易于单元测试的方式确定地构建URI。
其他回答
好吧,我只是连接两个字符串并使用正则表达式来完成清理部分。
public class UriTool
{
public static Uri Join(string path1, string path2)
{
string url = path1 + "/" + path2;
url = Regex.Replace(url, "(?<!http:)/{2,}", "/");
return new Uri(url);
}
}
因此,您可以这样使用:
string path1 = "http://someaddress.com/something/";
string path2 = "/another/address.html";
Uri joinedUri = UriTool.Join(path1, path2);
// joinedUri.ToString() returns "http://someaddress.com/something/another/address.html"
我发现以下功能很有用,并且具有以下功能:
抛出空或空白对多个Url段采用多个params参数在null或空时引发
班
public static class UrlPath
{
private static string InternalCombine(string source, string dest)
{
if (string.IsNullOrWhiteSpace(source))
throw new ArgumentException("Cannot be null or white space", nameof(source));
if (string.IsNullOrWhiteSpace(dest))
throw new ArgumentException("Cannot be null or white space", nameof(dest));
return $"{source.TrimEnd('/', '\\')}/{dest.TrimStart('/', '\\')}";
}
public static string Combine(string source, params string[] args)
=> args.Aggregate(source, InternalCombine);
}
测验
UrlPath.Combine("test1", "test2");
UrlPath.Combine("test1//", "test2");
UrlPath.Combine("test1", "/test2");
// Result = test1/test2
UrlPath.Combine(@"test1\/\/\/", @"\/\/\\\\\//test2", @"\/\/\\\\\//test3\") ;
// Result = test1/test2/test3
UrlPath.Combine("/test1/", "/test2/", null);
UrlPath.Combine("", "/test2/");
UrlPath.Combine("/test1/", null);
// Throws an ArgumentException
我创建了这个功能,可以让您的生活更轻松:
/// <summary>
/// The ultimate Path combiner of all time
/// </summary>
/// <param name="IsURL">
/// true - if the paths are Internet URLs, false - if the paths are local URLs, this is very important as this will be used to decide which separator will be used.
/// </param>
/// <param name="IsRelative">Just adds the separator at the beginning</param>
/// <param name="IsFixInternal">Fix the paths from within (by removing duplicate separators and correcting the separators)</param>
/// <param name="parts">The paths to combine</param>
/// <returns>the combined path</returns>
public static string PathCombine(bool IsURL , bool IsRelative , bool IsFixInternal , params string[] parts)
{
if (parts == null || parts.Length == 0) return string.Empty;
char separator = IsURL ? '/' : '\\';
if (parts.Length == 1 && IsFixInternal)
{
string validsingle;
if (IsURL)
{
validsingle = parts[0].Replace('\\' , '/');
}
else
{
validsingle = parts[0].Replace('/' , '\\');
}
validsingle = validsingle.Trim(separator);
return (IsRelative ? separator.ToString() : string.Empty) + validsingle;
}
string final = parts
.Aggregate
(
(string first , string second) =>
{
string validfirst;
string validsecond;
if (IsURL)
{
validfirst = first.Replace('\\' , '/');
validsecond = second.Replace('\\' , '/');
}
else
{
validfirst = first.Replace('/' , '\\');
validsecond = second.Replace('/' , '\\');
}
var prefix = string.Empty;
if (IsFixInternal)
{
if (IsURL)
{
if (validfirst.Contains("://"))
{
var tofix = validfirst.Substring(validfirst.IndexOf("://") + 3);
prefix = validfirst.Replace(tofix , string.Empty).TrimStart(separator);
var tofixlist = tofix.Split(new[] { separator } , StringSplitOptions.RemoveEmptyEntries);
validfirst = separator + string.Join(separator.ToString() , tofixlist);
}
else
{
var firstlist = validfirst.Split(new[] { separator } , StringSplitOptions.RemoveEmptyEntries);
validfirst = string.Join(separator.ToString() , firstlist);
}
var secondlist = validsecond.Split(new[] { separator } , StringSplitOptions.RemoveEmptyEntries);
validsecond = string.Join(separator.ToString() , secondlist);
}
else
{
var firstlist = validfirst.Split(new[] { separator } , StringSplitOptions.RemoveEmptyEntries);
var secondlist = validsecond.Split(new[] { separator } , StringSplitOptions.RemoveEmptyEntries);
validfirst = string.Join(separator.ToString() , firstlist);
validsecond = string.Join(separator.ToString() , secondlist);
}
}
return prefix + validfirst.Trim(separator) + separator + validsecond.Trim(separator);
}
);
return (IsRelative ? separator.ToString() : string.Empty) + final;
}
它适用于URL和普通路径。
用法:
// Fixes internal paths
Console.WriteLine(PathCombine(true , true , true , @"\/\/folder 1\/\/\/\\/\folder2\///folder3\\/" , @"/\somefile.ext\/\//\"));
// Result: /folder 1/folder2/folder3/somefile.ext
// Doesn't fix internal paths
Console.WriteLine(PathCombine(true , true , false , @"\/\/folder 1\/\/\/\\/\folder2\///folder3\\/" , @"/\somefile.ext\/\//\"));
//result : /folder 1//////////folder2////folder3/somefile.ext
// Don't worry about URL prefixes when fixing internal paths
Console.WriteLine(PathCombine(true , false , true , @"/\/\/https:/\/\/\lul.com\/\/\/\\/\folder2\///folder3\\/" , @"/\somefile.ext\/\//\"));
// Result: https://lul.com/folder2/folder3/somefile.ext
Console.WriteLine(PathCombine(false , true , true , @"../../../\\..\...\./../somepath" , @"anotherpath"));
// Result: \..\..\..\..\...\.\..\somepath\anotherpath
上面有托德·梅尼尔(Todd Menier)的评论,Flurl包括一个Url.Combine。
更多详情:
Url.Combine基本上是Url的Path.Combine,确保部分之间只有一个分隔符:
var url = Url.Combine(
"http://MyUrl.com/",
"/too/", "/many/", "/slashes/",
"too", "few?",
"x=1", "y=2"
// result: "http://www.MyUrl.com/too/many/slashes/too/few?x=1&y=2"
在NuGet上获取Flurl.Http:
PM>安装包Flurl.Http
或者获取没有HTTP功能的独立URL生成器:
PM>安装程序包Flurl
我还没有使用以下代码,但在我的互联网旅行中发现了它,以解决URL组合问题-希望它是一个简洁(并且成功!)的答案:
VirtualPathUtility.Combine