@nosferatu500/textract/lib/extractors/rtf.js

Extracting text from files of various type including html, pdf, doc, docx, xls, xlsx, csv, pptx, png, jpg, gif, rtf, text/*, and various open office.

const { exec } = require("child_process");
const os = require("os");
const path = require("path");
const util = require("../util");
const htmlExtract = require("./html");

let types;

function extractText(filePath, options, cb) {
    const execOptions = util.createExecOptions("rtf", options);
    const escapedPath = filePath.replace(/\s/g, "\\ ");
    // Going to output html from unrtf because unrtf does a great job of
    // going to html, but does a crap job of going to text. It leaves sections
    // out, strips apostrophes, leaves nasty quotes in for bullets and more
    // that I've likely not yet discovered.
    //
    // textract can go from html to text on its own, so let unrtf go to html
    // then extract the text from that
    //
    // Also do not have to worry about stripping comments from unrtf text
    // output since HTML comments are not included in output. Also, the
    // unrtf --quiet option doesn't work.
    exec(`unrtf --html --nopict ${escapedPath}`, execOptions, function (error, stdout /* , stderr */) {
        let err;
        if (error) {
            err = new Error(`unrtf read of file named [[ ${path.basename(filePath)} ]] failed: ${error}`);
            cb(err, null);
        } else {
            htmlExtract.extractFromText(stdout.trim(), {}, cb);
        }
    });
}

function testForBinary(options, cb) {
    // just non-osx extractor
    if (os.platform() === "darwin") {
        cb(true);
        return;
    }

    exec(`unrtf ${__filename}`, function (error /* , stdout, stderr */) {
        let msg;
        if (error !== null && error.message && error.message.includes("not found")) {
            msg = "INFO: 'unrtf' does not appear to be installed, " + "so textract will be unable to extract RTFs.";
            cb(false, msg);
        } else {
            cb(true);
        }
    });
}

// rely on native tools on osx
types = os.platform() === "darwin" ? [] : ["application/rtf", "text/rtf"];

module.exports = {
    types,
    extract: extractText,
    test: testForBinary,
};