C#Url操作類封裝、仿Node.Js中的Url模組執行個體_C#教程

在實際開發中，需要用到的資料在url中，因此就需要我們來擷取到url中有用的資訊，涉及到查詢、添加、修改、刪除等操作，下面我們就具體來瞭解一下。

1.簡單一實例

目前常用Url操作，查詢、添加、修改、刪除連結參數，重構產生連結等功能。

 //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=張三&age=1234#one#two";//string url = "http://www.gongjuji.net/abc/1234.html?name=&age=#one#two";//string url = "/abc/123.html?name=張三&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);//添加或修改參數_url.AddOrUpdateSearch("page", "2");_url.AddOrUpdateSearch("name", "李四");//重建連結參數Console.WriteLine(_url.GetUrl());Console.WriteLine(_url.GetUrl(true));

2、執行個體：

識別字串中的url

//string source = "工具集：http://www.gongjuji.net";string source = @"工具集：  http://www.gongjuji.net  愛漢字：http://hanzi.tianma3798.cn"; List<string> result = UrlAnalyze.GetUrlList(source);foreach (var item in result){  Console.WriteLine(item);}//替換成a標籤string result2 = UrlAnalyze.ReplaceToA(source);Console.WriteLine(result2);</string>

屬性和部分功能模仿了Node.js的url模組

原始碼定義：

/// <summary>/// Url地址的格式化和反格式化/// </summary>public class UrlAnalyze{  /// <summary>  /// 協議名稱  /// </summary>  public string Protocol { get; set; }  /// <summary>  /// 是否以反斜線結尾  /// </summary>  public bool Slashes { get; set; }  /// <summary>  /// 驗證資訊，暫時不使用  /// </summary>  public string Auth { get; set; }  /// <summary>  /// 全小寫主機部分，包括連接埠  /// </summary>  public string Host  {    get    {      if (this.Port == null)        return this.HostName;      return string.Format("{0}:{1}", this.HostName, this.Port);    }  }  /// <summary>  /// 連接埠，為空白時http預設是80  /// </summary>  public int? Port { get; set; }  /// <summary>  /// 小寫主機部分  /// </summary>  public string HostName { get; set; }  /// <summary>  /// 頁面錨點參數部分 #one#two  /// </summary>  public string Hash { get; set; }  /// <summary>  /// 連結查詢參數部分(帶問號) ?one=1&two=2  /// </summary>  public string Search { get; set; }  /// <summary>  /// 路徑部分  /// </summary>  public string PathName { get; set; }  /// <summary>  /// 路徑+參數部分(沒有錨點)  /// </summary>  public string Path  {    get    {      if (string.IsNullOrEmpty(this.Search))        return this.PathName;      return PathName + Search;    }  }  /// <summary>  /// 轉碼後的原連結  /// </summary>  public string Href { get; set; }   /// <summary>  /// 參數的key=value 列表  /// </summary>  private Dictionary<string, string=""> _SearchList = null;  #region 初始化處理  /// <summary>  /// 空初始化  /// </summary>  public UrlAnalyze() { _SearchList = new Dictionary<string, string="">(); }  /// <summary>  /// 初始化處理  /// </summary>  ///<param name="url">指定相對或絕對連結  public UrlAnalyze(string url)  {    //1.轉碼操作    this.Href = HttpUtility.UrlDecode(url);    InitParse(this.Href);    //是否反斜線結尾    if (!string.IsNullOrEmpty(PathName))      this.Slashes = this.PathName.EndsWith("/");    //初始化參數列表    _SearchList = GetSearchList();  }  /// <summary>  /// 將字串格式化成對象時初始化處理  /// </summary>  private void InitParse(string url)  {    //判斷是否是指定協議的絕對路徑    if (url.Contains("://"))    {      // Regex reg = new Regex(@"(\w+):\/\/([^/:]+)(:\d*)?([^ ]*)");      Regex reg = new Regex(@"(\w+):\/\/([^/:]+)(:\d*)?(.*)");      Match match = reg.Match(url);      //協議名稱      this.Protocol = match.Result("$1");      //主機      this.HostName = match.Result("$2");      //連接埠      string port = match.Result("$3");      if (string.IsNullOrEmpty(port) == false)      {        port = port.Replace(":", "");        this.Port = Convert.ToInt32(port);      }      //路徑和查詢參數      string path = match.Result("$4");      if (string.IsNullOrEmpty(path) == false)        InitPath(path);    }    else    {      InitPath(url);    }  }  /// <summary>  /// 字串url格式化時，路徑和參數的初始化處理  /// </summary>  ///<param name="path">  private void InitPath(string path)  {    Regex reg = new Regex(@"([^#?& ]*)(\??[^#]*)(#?[^?& ]*)");    Match match = reg.Match(path);    //路徑和查詢參數    this.PathName = match.Result("$1");    this.Search = match.Result("$2");    this.Hash = match.Result("$3");  }  #endregion   #region 參數處理  /// <summary>  /// 擷取當前參數解析結果字典列表  /// </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>  /// 擷取查詢參數的值  /// </summary>  ///<param name="key">鍵  /// <returns></returns>  public string GetSearchValue(string key)  {    return _SearchList[key];  }  /// <summary>  /// 添加參數key=value,如果值已經存在則修改  /// </summary>  ///<param name="key">鍵  ///<param name="value">值  /// <returns></returns>  public void AddOrUpdateSearch(string key, string value, bool Encode = false)  {    if (Encode)      value = HttpUtility.UrlEncode(value);    //判斷指定索引值是否存在    if (_SearchList.ContainsKey(key))    {      _SearchList[key] = value;    }    else    {      _SearchList.Add(key, value);    }  }  /// <summary>  /// 刪除指定key 的索引值對  /// </summary>  ///<param name="key">鍵  public void Remove(string key)  {    if (_SearchList.Any(q => q.Key == key))      _SearchList.Remove(key);  }  /// <summary>  /// 擷取錨點列表  /// </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>  /// 擷取最終url地址,  /// 對參數值就行UrlEncode 編碼後，有可能和原連結不相同  /// </summary>  /// <returns></returns>  public string GetUrl(bool EncodeValue = false)  {    StringBuilder builder = new StringBuilder();    if (!string.IsNullOrEmpty(Protocol))    {      //如果有協議      builder.Append(Protocol).Append("://");    }    //如果有主機標識    builder.Append(Host);    //如果有目錄和參數    if (!string.IsNullOrEmpty(PathName))    {      string pathname = PathName;      if (pathname.EndsWith("/"))        pathname = pathname.Substring(0, pathname.Length - 1);      builder.Append(pathname);    }    //判斷是否反斜線    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);      }    }    //錨點    builder.Append(Hash);    return builder.ToString();  }  #region 靜態方法  /// <summary>  /// 擷取源字串中所有的連結（可能有重複）  /// </summary>  ///<param name="content">源字串  /// <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>  /// 將字串中的連結成標籤  /// </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}</url></string></string></string></string,></string></string></string></string,></string,></string,></string,>

所屬原始碼庫：https://github.com/tianma3798/Common

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