XML解析器內存溢出

Question

你好，我試圖編寫一個XML解析器導入我的新項目的配置文件。但是，我得到一個內存溢出與一個功能誰正在工作，所有的時間才適當。

在「距離= getFirstMatchBetweenKeyword（interfaceText，」距離「）;」;在進口接口方法

這是Importer.class：

class Importer 
{ 
    string path; 
    List<Router> routerlist = new List<Router>(); 
    StreamReader sr; 

    public Importer(string newPath) 
    { 
     path = newPath; 
     sr = new StreamReader(path); 
    } 

    public List<Router> getConfig() 
    { 
     getNodes(loadFile()); 
     return routerlist; 
    } 

    string loadFile() 
    { 
     string temp; 
     //StreamReader sr = new StreamReader(path); 
     temp = sr.ReadToEnd().TrimEnd(' '); 
     temp.TrimStart(' '); 
     return temp; 
    } 

    void getNodes(string importText) 
    { 
     string nodetext = getFirstMatchBetweenKeyword(importText, "Nodelist"); 
     while (nodetext.Length > 0) 
     { 
      importNode(getFirstMatchBetweenKeyword(nodetext, "Node")); 
      nodetext = delTextUntil(nodetext, "Node"); 
     } 
    } 

    void importNode(string nodeText) { 
     Router rtr; 
     Interface intr; 
     string name; 
     name = getFirstMatchBetweenKeyword(nodeText, "Name"); 
     rtr = new Router(name); 
     while (nodeText.Length > 0) 
     { 
      intr = importInterface(getFirstMatchBetweenKeyword(nodeText, "Interface")); 
      nodeText = delTextUntil(nodeText, "Interface"); 
      rtr.setInterface(intr.Interf, intr.Network, intr.Distance); 
     } 
     routerlist.Add(rtr); 
    } 

    Interface importInterface(string interfaceText) 
    { 
     Interface inter; 
     string name; 
     string network; 
     string distance; 

     name = getFirstMatchBetweenKeyword(interfaceText, "Interfacename"); 
     network = getFirstMatchBetweenKeyword(interfaceText, "Network"); 
     distance = getFirstMatchBetweenKeyword(interfaceText, "Distance"); 

     inter = new Interface(name, network, distance); 

     return inter; 
    } 
    string getFirstMatchBetweenKeyword(string text, string keyword) 
    { 
     string starting = "<" + keyword + ">"; 
     string ending = "</" + keyword + ">"; 

     char[] oldText; 
     char[] start; 
     char[] end; 
     char[] newText; 
     int helper = 0; 
     int bufferindex = 0; 
     bool startParse = false; 
     bool endParse = false; 

     oldText = text.ToCharArray(); 
     start = starting.ToCharArray(); 
     end = ending.ToCharArray(); 
     newText = new char[oldText.Length]; 

     string output; 

     for (int i = 0; i < oldText.Length; i++) 
     { 
      if (startParse) 
      { 
       if (endParse) 
       { 
        int delcounter = end.Length; 
        for (int ii = 0 ; ii < delcounter; ii++) 
        { 
         newText[bufferindex] = ' '; 
         bufferindex--; 
        } 
        break; 
       } 
       else 
       { 
        newText[bufferindex] = oldText[i]; 
        bufferindex++; 
        if (oldText[i] == end[helper]) 
        { 
         helper++; 
         if (helper == end.Length) 
         { 
          endParse = true; 
         } 
        } 
        else 
        { 
         helper = 0; 
        } 
       } 
      } 
      else 
      { 
       if (oldText[i] == start[helper]) 
       { 
        helper++; 
        if(helper == start.Length){ 
         startParse = true; 
         helper = 0; 
        } 
       } 
       else 
       { 
        helper = 0; 
       } 
      } 
     } 
     output = new string(newText); 
     return output.TrimEnd(' '); 
    } 
    string delTextUntil(string oldText, string keyword) 
    { 
     keyword = "</" + keyword + ">"; 
     char[] old = oldText.ToCharArray(); 
     char[] key = keyword.ToCharArray(); 

     int keyindex = 0; 

     for (int i = 0; i < old.Length; i++) 
     { 
      old[i] = ' '; 
      if (oldText[i] == keyword[keyindex]) 
      { 
       keyindex++; 
       if (keyindex == keyword.Length) 
       { 
        break; 
       } 
      } 
      else { 
       keyindex = 0; 
      } 
     } 
     keyword = new string(old); 
     keyword.TrimStart(' '); 
     return keyword; 
    } 
} 

，如果你需要，這裏的接口和Router類的定義：

class Router { 
    string name = ""; 
    List<Interface> nodeList = new List<Interface>(); 


    public Router(string newName) 
    { 
     name = newName; 
    } 

    public string Name 
    { 
     get { return name; } 
     set { name = value; } 
    } 

    public void setInterface(string newInterface, string newNetwork, string newDistance) 
    { 
     Interface rnetdis = new Interface(newInterface, newNetwork, newDistance); 
     nodeList.Add(rnetdis);   
    } 

    public List<Interface> getRouterInterfaces() 
    { 
     return nodeList; 
    } 

    public bool delNetwork(string networkName) 
    { 
     for (int i = 0; i < nodeList.Count(); i++) 
     { 
      if (nodeList[i].Network == networkName) 
      { 
       nodeList.RemoveAt(i); 
       return true; 
      } 
     } 
     return false; 
    } 
} 

class Interface { 
    string interf; 
    string network; 
    string distance; 

    public Interface(string newInterf) 
    { 
     interf = newInterf; 
    } 

    public Interface(string newInterf, string newNetwork, string newDistance) 
    { 
     interf = newInterf; 
     network = newNetwork; 
     distance = newDistance; 
    } 

    public string Interf 
    { 
     set{ 
      interf = value; 
     } 
     get 
     { 
      return interf; 
     } 
    } 

    public string Network 
    { 
     set 
     { 
      network = value; 
     } 
     get 
     { 
      return network; 
     } 
    } 
    public string Distance 
    { 
     set 
     { 
      distance = value; 
     } 
     get 
     { 
      return distance; 
     } 
    } 
} 

的配置我想分析看起來像這樣：

<Nodelist> 
    <Node> 
     <Name>r1</Name> 
     <Interface> 
      <Interfacename>inter1</Interfacename> 
      <Network>5</Network> 
      <Distance>50</Distance> 
     </Interface> 
     <Interface> 
      <Interfacename>inter2</Interfacename> 
      <Network>2</Network> 
      <Distance>20</Distance> 
     </Interface> 
    </Node> 
    <Node> 
     <Name>r2</Name> 
     <Interface> 
      <Interfacename>inter1</Interfacename> 
      <Network>5</Network> 
      <Distance>50</Distance> 
     </Interface> 
    </Node> 
    <Node> 
     <Name>r3</Name> 
     <Interface> 
      <Interfacename>inter1</Interfacename> 
      <Network>2</Network> 
      <Distance>20</Distance> 
     </Interface> 
    </Node> 
</Nodelist> 

希望有人能幫助我。

非常感謝提前，

克里斯

Answer 1

有很多的原因不是自己的XML解析。 閱讀這篇優秀的文章：http://elegantcode.com/2010/08/07/dont-parse-that-xml/