C++ Xerces Parser 加載 HTML 並蒐索 HTML 元素 (C++ Xerces Parser Load HTML and Search for HTML Elements)

問題描述

C++ Xerces Parser 加載 HTML 並蒐索 HTML 元素 (C++ Xerces Parser Load HTML and Search for HTML Elements)

我正在嘗試使用 Xerces DOMDocument C++ 解析器加載 HTML 並蒐索特定的 HTML 元素。我很難找到如何實現這一點的好例子。我似乎發現的只是解析 XML。有人可以幫忙嗎？謝謝。

參考解法

方法 1:

Take a look at this: http://xerces.apache.org/xerces‑c/program‑dom‑3.html

There is an example with DOMDocument as well:

// // Create a small document tree //

{
    XMLCh tempStr[100];

    XMLString::transcode("Range", tempStr, 99);
    DOMImplementation* impl = DOMImplementationRegistry::getDOMImplementation(tempStr, 0);

    XMLString::transcode("root", tempStr, 99);
    DOMDocument*   doc = impl‑>createDocument(0, tempStr, 0);
    DOMElement*   root = doc‑>getDocumentElement();

    XMLString::transcode("FirstElement", tempStr, 99);
    DOMElement*   e1 = doc‑>createElement(tempStr);
    root‑>appendChild(e1);

    XMLString::transcode("SecondElement", tempStr, 99);
    DOMElement*   e2 = doc‑>createElement(tempStr);
    root‑>appendChild(e2);

    XMLString::transcode("aTextNode", tempStr, 99);
    DOMText*       textNode = doc‑>createTextNode(tempStr);
    e1‑>appendChild(textNode);

    // optionally, call release() to release the resource associated with the range after done
    DOMRange* range = doc‑>createRange();
    range‑>release();

    // removedElement is an orphaned node, optionally call release() to release associated resource
    DOMElement* removedElement = root‑>removeChild(e2);
    removedElement‑>release();

    // no need to release this returned object which is owned by implementation
    XMLString::transcode("*", tempStr, 99);
    DOMNodeList*    nodeList = doc‑>getElementsByTagName(tempStr);

    // done with the document, must call release() to release the entire document resources
    doc‑>release();
};

... and so long.

EDIT:

But how do I load HTML into the DOMDocument and search against the html elements? Thats what Im trying to figure out.

XercesDOMParser parser;

parser.loadGrammar("grammar.dtd", Grammar::DTDGrammarType);

parser.setValidationScheme(XercesDOMParser::Val_Always);

Handler handler;

parser.setErrorHandler( &handler );

parser.parse("xmlfile.xml");

(by somejkuser、Leo Chapiro)

參考文件

1. C++ Xerces Parser Load HTML and Search for HTML Elements (CC BY‑SA 2.5/3.0/4.0)