跨平台的Html解析代码

发表于 2013 年 8 月 27 日由 admin

前一段时间为了解析HTML在网上找Delphi版本的HTML解析器,发现没有太好用的.遇到复杂的HTML都会出错.最常见的JavaScript中嵌入HTML的字符串,会解析出错.
至于收费的没看过.不知道怎么样.

于是自己写了一个,到现在没有遇到解析出错的HTML.现在公开出来给大家用.只是苦了老外那几个收费的.

采用的是接口形式,生存期自管理,不用理会释放的事情.最近又增加了CSS Selector语法的查找功能.可以像CSS选择器一样选择节点.
只引用了SysUtils单元.避免了在高版本Delphi中Classes这个体积大户.同时也具有较好的跨平台性.
支持Delphi7-DelphiXE4为止的编译器.

因为采用的是接口,理论上编译成DLL的话C++和VB也能使用.
接口声明如下:

IHtmlElement = interface

['{8C75239C-8CFA-499F-B115-7CEBEDFB421B}']

function GetOwner: IHtmlElement; stdcall;

function GetTagName: WideString; safecall;

function GetContent: WideString; safecall;

function GetOrignal: WideString; safecall;

function GetChildrenCount: Integer; stdcall;

function GetChildren(Index: Integer): IHtmlElement; stdcall;

function GetCloseTag: IHtmlElement; stdcall;

function GetInnerHtml(): WideString; safecall;

function GetOuterHtml(): WideString; safecall;

function GetInnerText(): WideString; safecall;

function GetAttributes(Key: WideString): WideString; safecall;

function GetSourceLineNum(): Integer; stdcall;

function GetSourceColNum(): Integer; stdcall;

// 属性是否存在

function HasAttribute(AttributeName: WideString): Boolean; stdcall;

// 查找节点

{ FindElements('Link','type="application/rss+xml"')

FindElements('','type="application/rss+xml"')

}

function FindElements(ATagName: WideString; AAttributes: WideString;

AOnlyInTopElement: Boolean): IHtmlElementList; stdcall;

//用CSS选择器语法查找Element

function SimpleCSSSelector(const selector: WideString)

: IHtmlElementList; stdcall;

// 枚举属性

procedure EnumAttributeNames(AParam: Pointer;

ACallBack: TEnumAttributeNameCallBack); stdcall;

property TagName: WideString read GetTagName;

property ChildrenCount: Integer read GetChildrenCount;

property Children[index: Integer]: IHtmlElement read GetChildren; default;

property CloseTag: IHtmlElement read GetCloseTag;

property Content: WideString read GetContent;

property Orignal: WideString read GetOrignal;

property Owner: IHtmlElement read GetOwner;

// 获取元素在源代码中的位置

property SourceLineNum: Integer read GetSourceLineNum;

property SourceColNum: Integer read GetSourceColNum;

//

property InnerHtml: WideString read GetInnerHtml;

property OuterHtml: WideString read GetOuterHtml;

property InnerText: WideString read GetInnerText;

property Attributes[Key: WideString]: WideString read GetAttributes;

end;

IHtmlElementList = interface

['{8E1380C6-4263-4BF6-8D10-091A86D8E7D9}']

function GetCount: Integer; stdcall;

function GetItems(Index: Integer): IHtmlElement; stdcall;

property Count: Integer read GetCount;

property Items[Index: Integer]: IHtmlElement read GetItems; default;

end;

function ParserHTML(const Source: WideString): IHtmlElement; stdcall;

GoogleCode SVN源代码:

http://code.google.com/p/delphi-html-parser/

或者
htmlparser

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