nodejs elementtree npm xml解析与合并

Question

我有一个关于我上次在下面帖子中发布的相同模块的问题。看起来，处理 XML 解析相当困难。 elementTree 的文档非常少。

我有一个下面的 template_XML 文件：

<?xml version="1.0" encoding="UTF-8"?>
<Tailoring xmlns="http://checklists.nist.gov/xccdf/1.2" id="xccdf_org.open-scap_tailoring_example">
<status>incomplete</status>
<version time="2013-01-15T16:00:00.000+02:00">1.0</version>
    <Profile id="PlaceHolder">
    <title>Tailoring for py_test</title>
    <select idref="xccdf_rule_name" selected="true"/>
</Profile>
</Tailoring>

还有一个下面的 sample_XML 文件：

<Benchmark xmlns="http://checklists.nist.gov/xccdf/1.1" xmlns:xsi="www.w3.org/2001/XMLSchema-instance" id="SAP-HANA" resolved="1" xml:lang="en-US">
<status date="2016-03-17">draft</status>
<title xmlns:xhtml="http://www.w3.org/1999/xhtml" xml:lang="en-US">Guide to the Secure Configuration of SAP HANA</title>
<version>0.1.28</version>

<Profile id="profile1">
    <title xmlns:xhtml="http://www.w3.org/1999/xhtml" xml:lang="en-US">text1</title>
    <select idref="This is rule 1" selected="true"/>
    <set-value idref="ssfs_master_key_timeout">20</set-value>
</Profile> 

<Profile id="profile2">
    <title xmlns:xhtml="http://www.w3.org/1999/xhtml" xml:lang="en-US">text2</title>
    <select idref="this is rule1" selected="true"/>
    <select idref="this is rule1" selected="true"/>
    <select idref="this is rule1" selected="true"/>
</Profile>
</Benchmark>

我需要创建一个 new_xml 文件，一个 模板_XML 文件的副本。 但想将 new_xml 文件中的“PlaceHolder”配置文件标签替换为 sample_XML 文件的“profile2”标签。它是一种合并 2 个 xml 文件并创建一个新文件。 以下是我尝试过的代码：

function call(id){
    var template_XML = 'C:\\MyDrive\\template_XML';
    var new_xml = 'C:\\MyDrive\\new_xml';
    data = fs.readFileSync(template_XML).toString();
    data1 = fs.readFileSync(sample_XML).toString();
    etree = et.parse(data);
    etree1 = et.parse(data1);
    var profile = etree.find('./Profile');  // Getting the profile sub-element.
    etree.getroot().remove(profile)         // Removing the sub-element. So that I can insert new profile from sample file

    var profiles = etree1.findall('./Profile'); // Find the required profile.
    for (var i = 0; i < profiles.length; i++) {
        if(profiles[i].get('id') == 'profile2')
            var tmppro = profiles[i];
    }
    console.log(tmppro);
    etree.insert(3,tmppro);     // insert it. Failing

    var write = fs.openSync(new_xml, 'w');
    etree.write(write);                     // write it. Failing
}

出于某种原因，此代码在“etree.insert”和“etree.write”方面不起作用

Answer 1

最后我能够让它与当前的库一起工作。 请看我的cmets：

'use strict';

const et = require('elementtree');
const path = require('path');
const fs = require('fs');

function populateXmlTemplate(id) {
	//Please use path.join to make it cross-platform
	var template_XML = path.join(__dirname, 'template.xml');
	var sample_XML = path.join(__dirname, 'sample.xml');
	var new_xml = path.join(__dirname, 'new.xml');

	var data = fs.readFileSync(template_XML).toString();
	var data1 = fs.readFileSync(sample_XML).toString();

	var etree = et.parse(data);
	var etree1 = et.parse(data1);

	var root = etree.getroot();

	var placeholder = root.find('./Profile');
	root.remove(placeholder);

	var profiles = etree1.findall('./Profile'); // Find the required profile.
	for (var i = 0; i < profiles.length; i++) {
		//If I get it right, it shouldn't be hardcoded
		if (profiles[i].get('id') == id) {
			var tmppro = profiles[i];
		}
	}

	//After you removed the placeholder the number of children decreased
	//So it should be 2, not 3.
	//Also etree doesn't have insert method, please call root.insert
	root.insert(2, tmppro);

	//You have been writing the document a bit incorrectly.
	var resultXml = etree.write();
	fs.writeFileSync(new_xml, resultXml);
}

populateXmlTemplate('profile2');

module.exports = {populateXmlTemplate};

但你是对的，文档不好。大部分都不见了。所以大多数时候我只是通过debugging 来查看可用的方法，lib repo 中也有一些tests。

还有其他模块可以使用 js。请看这个answer。