fast-xml-parser/cli.js

Validate XML or Parse XML to JS/JSON very fast without C/C++ based libraries

#!/usr/bin/env node
"use strict";
/*eslint-disable no-console*/
const fs = require("fs");
const path = require("path");
const parser = require("./lib/parser");
const readToEnd = require("./src/read").readToEnd;

if (process.argv[2] === "--help" || process.argv[2] === "-h") {
    console.log("Fast XML Parser " + require(path.join(__dirname + "/package.json")).version);
    console.log("----------------");
    console.log("xml2js [-ns|-a|-c|-v|-V] <filename> [-o outputfile.json]");
    console.log("cat xmlfile.xml | xml2js [-ns|-a|-c|-v|-V] [-o outputfile.json]");
    console.log("-ns: remove namespace from tag and atrribute name.");
    console.log("-a: don't parse attributes.");
    console.log("-c: parse values to premitive type.");
    console.log("-v: validate before parsing.");
    console.log("-V: validate only.");
} else if (process.argv[2] === "--version") {
    console.log(require(path.join(__dirname + "/package.json")).version);
} else {
    const options = {
        ignoreNameSpace:     true,
        ignoreAttributes:    false,
        parseNodeValue:      true,
        parseAttributeValue: true
    };
    let fileName = "";
    let outputFileName;
    let validate = false;
    let validateOnly = false;
    for (let i = 2; i < process.argv.length; i++) {
        if (process.argv[i] === "-ns") {
            options.ignoreNameSpace = false;
        } else if (process.argv[i] === "-a") {
            options.ignoreAttributes = true;
        } else if (process.argv[i] === "-c") {
            options.parseNodeValue = false;
            options.parseAttributeValue = false;
        } else if (process.argv[i] === "-o") {
            outputFileName = process.argv[++i];
        } else if (process.argv[i] === "-v") {
            validate = true;
        } else if (process.argv[i] === "-V") {
            validateOnly = true;
        } else {//filename
            fileName = process.argv[i];
        }
    }
    const callback = function(xmlData) {
        let output = "";
        if (validate) {
            const result = parser.validate(xmlData);
            if (result === true) {
                output = JSON.stringify(parser.parse(xmlData, options), null, 4);
            } else {
                output = result;
            }
        } else if (validateOnly) {
            output = parser.validate(xmlData);
        } else {
            output = JSON.stringify(parser.parse(xmlData, options), null, 4);
        }
        if (outputFileName) {
            writeToFile(outputFileName, output);
        } else {
            console.log(output);
        }
    };

    try {
        if (!fileName) {
            readToEnd(process.stdin, function(err, data) {
                if (err) {
                    throw err;
                }
                callback(data);
            });
        } else {
            fs.readFile(fileName, function(err, data) {
                if (err) {
                    throw err;
                }
                callback(data);
            });
        }
    }
    catch (e) {
        console.log("Seems an invalid file or stream." + e);
    }
}

function writeToFile(fileName, data) {
    fs.writeFile(fileName, data, function(err) {
        if (err) {
            throw err;
        }
        console.log('JSON output has been written to ' + fileName);
    });
}