C#Url操作类封装、仿Node.Js中的Url模块实例
作者：天马3798
这篇文章主要介绍了C#Url操作类封装、仿Node.Js中的Url模块，实例分析了C#Url操作类封装的技巧，非常具有实用价值，需要的朋友可以参考下。
在实际开发中，需要用到的数据在url中，因此就需要我们来获取到url中有用的信息，涉及到查询、添加、修改、删除等操作，下面我们就具体来了解一下。
1.简单实例
目前常用Url操作，查询、添加、修改、删除链接参数，重构生成链接等功能。
//string url = "http://www.gongjuji.net:8081";
//string url = "http://www.gongjuji.net/";
//string url = "http://www.gongjuji.net/abc";
// string url = "http://www.gongjuji.net/abc/1234.html";
string url = "http://www.gongjuji.net/abc/1234.html?name=张三&age=1234#one#two";
//string url = "http://www.gongjuji.net/abc/1234.html?name=&age=#one#two";
//string url = "/abc/123.html?name=张三&age=1234#one#two";
// string url = "https://mp.weixin.qq.com/debug/cgi-bin/apiinfo?t=index&type=%E7%94%A8%E6%88%B7%E7%AE%A1%E7%90%86&form=%E8%8E%B7%E5%8F%96%E5%85%B3%E6%B3%A8%E8%80%85%E5%88%97%E8%A1%A8%E6%8E%A5%E5%8F%A3%20/user/get";
UrlAnalyze _url = new UrlAnalyze(url);
JObject obj = JObject.FromObject(_url);
Console.WriteLine(obj);
//添加或修改参数
_url.AddOrUpdateSearch("page", "2");
_url.AddOrUpdateSearch("name", "李四");
//重新生成链接参数
Console.WriteLine(_url.GetUrl());
Console.WriteLine(_url.GetUrl(true));
2、实例：
识别字符串中的url
//string source = "工具集：http://www.gongjuji.net";
string source = @"工具集：
http://www.gongjuji.net
爱汉字：http://hanzi.tianma3798.cn";
List<string> result = UrlAnalyze.GetUrlList(source);
foreach (var item in result)
{
Console.WriteLine(item);
}
//替换成a标签
string result2 = UrlAnalyze.ReplaceToA(source);
Console.WriteLine(result2);</string>
属性和部分功能模仿了Node.js的url模块
源代码定义：
/// <summary>
/// Url地址的格式化和反格式化
/// </summary>
public class UrlAnalyze
{
/// <summary>
/// 协议名称
/// </summary>
public string Protocol { get; set; }
/// <summary>
/// 是否以反斜杠结尾
/// </summary>
public bool Slashes { get; set; }
/// <summary>
/// 验证信息，暂时不使用
/// </summary>
public string Auth { get; set; }
/// <summary>
/// 全小写主机部分，包括端口
/// </summary>
public string Host
{
get
{
if (this.Port == null)
return this.HostName;
return string.Format("{0}:{1}", this.HostName, this.Port);
}
}
/// <summary>
/// 端口，为空时http默认是80
/// </summary>
public int? Port { get; set; }
/// <summary>
/// 小写主机部分
/// </summary>
public string HostName { get; set; }
/// <summary>
/// 页面锚点参数部分 #one#two
/// </summary>
public string Hash { get; set; }
/// <summary>
/// 链接查询参数部分(带问号) ?one=1&two=2
/// </summary>
public string Search { get; set; }
/// <summary>
/// 路径部分
/// </summary>
public string PathName { get; set; }
/// <summary>
/// 路径+参数部分(没有锚点)
/// </summary>
public string Path
{
get
{
if (string.IsNullOrEmpty(this.Search))
return this.PathName;
return PathName + Search;
}
}
/// <summary>
/// 转码后的原链接
/// </summary>
public string Href { get; set; }
/// <summary>
/// 参数的key=value 列表
/// </summary>
private Dictionary<string, string=""> _SearchList = null;
#region 初始化处理
/// <summary>
/// 空初始化
/// </summary>
public UrlAnalyze() { _SearchList = new Dictionary<string, string="">(); }
/// <summary>
/// 初始化处理
/// </summary>
///<param name="url">指定相对或绝对链接
public UrlAnalyze(string url)
{
//1.转码操作
this.Href = HttpUtility.UrlDecode(url);
InitParse(this.Href);
//是否反斜杠结尾
if (!string.IsNullOrEmpty(PathName))
this.Slashes = this.PathName.EndsWith("/");
//初始化参数列表
_SearchList = GetSearchList();
}
/// <summary>
/// 将字符串格式化成对象时初始化处理
/// </summary>
private void InitParse(string url)
{
//判断是否是指定协议的绝对路径
if (url.Contains("://"))
{
// Regex reg = new Regex(@"(\w+):\/\/([^/:]+)(:\d*)?([^ ]*)");
Regex reg = new Regex(@"(\w+):\/\/([^/:]+)(:\d*)?(.*)");
Match match = reg.Match(url);
//协议名称
this.Protocol = match.Result("$1");
//主机
this.HostName = match.Result("$2");
//端口
string port = match.Result("$3");
if (string.IsNullOrEmpty(port) == false)
{
port = port.Replace(":", "");
this.Port = Convert.ToInt32(port);
}
//路径和查询参数
string path = match.Result("$4");
if (string.IsNullOrEmpty(path) == false)
InitPath(path);
}
else
{
InitPath(url);
}
}
/// <summary>
/// 字符串url格式化时，路径和参数的初始化处理
/// </summary>
///<param name="path">
private void InitPath(string path)
{
Regex reg = new Regex(@"([^#?& ]*)(\??[^#]*)(#?[^?& ]*)");
Match match = reg.Match(path);
//路径和查询参数
this.PathName = match.Result("$1");
this.Search = match.Result("$2");
this.Hash = match.Result("$3");
}
#endregion
#region 参数处理
/// <summary>
/// 获取当前参数解析结果字典列表
/// </summary>
/// <returns></returns>
public Dictionary<string, string=""> GetSearchList()
{
if (_SearchList != null)
return _SearchList;
_SearchList = new Dictionary<string, string="">();
if (!string.IsNullOrEmpty(Search))
{
Regex reg = new Regex(@"(^|&)?(\w+)=([^&]*)", RegexOptions.Compiled);
MatchCollection coll = reg.Matches(Search);
foreach (Match item in coll)
{
string key = item.Result("$2").ToLower();
string value = item.Result("$3");
_SearchList.Add(key, value);
}
}
return _SearchList;
}
/// <summary>
/// 获取查询参数的值
/// </summary>
///<param name="key">键
/// <returns></returns>
public string GetSearchValue(string key)
{
return _SearchList[key];
}
/// <summary>
/// 添加参数key=value,如果值已经存在则修改
/// </summary>
///<param name="key">键
///<param name="value">值
/// <returns></returns>
public void AddOrUpdateSearch(string key, string value, bool Encode = false)
{
if (Encode)
value = HttpUtility.UrlEncode(value);
//判断指定键值是否存在
if (_SearchList.ContainsKey(key))
{
_SearchList[key] = value;
}
else
{
_SearchList.Add(key, value);
}
}
/// <summary>
/// 删除指定key 的键值对
/// </summary>
///<param name="key">键
public void Remove(string key)
{
if (_SearchList.Any(q => q.Key == key))
_SearchList.Remove(key);
}
/// <summary>
/// 获取锚点列表
/// </summary>
/// <returns></returns>
public List<string> GetHashList()
{
List<string> list = new List<string>();
if (!string.IsNullOrEmpty(Hash))
{
list = Hash.Split('#').Where(q => string.IsNullOrEmpty(q) == false)
.ToList();
}
return list;
}
#endregion
/// <summary>
/// 获取最终url地址,
/// 对参数值就行UrlEncode 编码后，有可能和原链接不相同
/// </summary>
/// <returns></returns>
public string GetUrl(bool EncodeValue = false)
{
StringBuilder builder = new StringBuilder();
if (!string.IsNullOrEmpty(Protocol))
{
//如果有协议
builder.Append(Protocol).Append("://");
}
//如果有主机标识
builder.Append(Host);
//如果有目录和参数
if (!string.IsNullOrEmpty(PathName))
{
string pathname = PathName;
if (pathname.EndsWith("/"))
pathname = pathname.Substring(0, pathname.Length - 1);
builder.Append(pathname);
}
//判断是否反斜杠
if (Slashes)
{
builder.Append("/");
}
Dictionary<string, string=""> searchList = GetSearchList();
if (searchList != null && searchList.Count > 0)
{
builder.Append("?");
bool isFirst = true;
foreach (var item in searchList)
{
if (isFirst == false)
{
builder.Append("&");
}
isFirst = false;
builder.AppendFormat("{0}={1}", item.Key, EncodeValue ? HttpUtility.UrlEncode(item.Value) : item.Value);
}
}
//锚点
builder.Append(Hash);
return builder.ToString();
}
#region 静态方法
/// <summary>
/// 获取源字符串中所有的链接（可能有重复）
/// </summary>
///<param name="content">源字符串
/// <returns></returns>
public static List<string> GetUrlList(string content)
{
List<string> list = new List<string>();
Regex re = new Regex(@"(?<url>http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?)");
MatchCollection mc = re.Matches(content);
foreach (Match m in mc)
{
if (m.Success)
{
string url = m.Result("${url}");
list.Add(url);
}
}
return list;
}
/// <summary>
/// 将字符串中的链接成标签
/// </summary>
///<param name="content">
/// <returns></returns>
public static string ReplaceToA(string content)
{
Regex re = new Regex(@"(?<url>http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?)");
MatchCollection mc = re.Matches(content);
foreach (Match m in mc)
{
content = content.Replace(m.Result("${url}"), String.Format("</url>{0}", m.Result("${url}")));
}
return content;
}
#endregion
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所属源代码库：https://github.com/tianma3798/Common
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