Nodejs Xpath名字空间

1 min read

如果xml文件带有名字空间，XPATH支持

还不够完善。下面介绍两种可以工作的方式

namespace for XML documents

http.get("https://wubigo.com/en/sitemap.xml", function(res) {

useNamespaces

const select = xpath.useNamespaces({"ns0": "http://www.sitemaps.org/schemas/sitemap/0.9"});
const nodes = select("//ns0:loc", doc);
nodes.forEach((value) => console.log("ns0:"+value));

Implementing a Default Namespace Resolver

const nsResolver = function nsResolver(prefix) {
    const ns = {
        'ns0' : 'http://www.sitemaps.org/schemas/sitemap/0.9',
        'mathml': 'http://www.w3.org/1998/Math/MathML'
    };
    return ns[prefix] || null;
};
nsResolver.lookupNamespaceURI = nsResolver;


var result = xpath.evaluate(
            "//ns0:loc",            // xpathExpression
            doc,                        // contextNode
            nsResolver,                       // namespaceResolver
            xpath.XPathResult.ANY_TYPE, // resultType
            null                        // result
        )
         
node = result.iterateNext();
while (node) {
            console.log("url="+node.toString());
            node = result.iterateNext();
}
NODE XML

Related