index.js


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'use strict';
const http = require('http');
const Highlights = require('highlights');
const highlighter = new Highlights();
highlighter.requireGrammarsSync({
    "modulePath": require.resolve('language-perl6/package.json'),
});
highlighter.requireGrammarsSync({
    "modulePath": require.resolve('language-emacs-lisp/package.json'),
});
highlighter.requireGrammarsSync({
    "modulePath": require.resolve('language-openscad/package.json'),
});
highlighter.requireGrammarsSync({
    "modulePath": require.resolve('language-restructuredtext/package.json'),
});
 
const Selector = require('first-mate-select-grammar');
const selector = Selector();
function addExtensionsToGrammar(knownExtension,extraExtensions) {
  let grammar = selector.selectGrammar(
    highlighter.registry,
    `some_file.${knownExtension}`,
    "not much");
  if (grammar) {
    Array.prototype.push.apply(grammar.fileTypes,extraExtensions);
  }
}
 
addExtensionsToGrammar('cpp',['ino']);
addExtensionsToGrammar('rst',['rst.txt','rest.txt']);
 
const server = http.createServer((req, res) => {
    const filename = req.headers['filename'];
    let buffer = '';
    res.setHeader('Content-type','text/html; charset=utf-8');
    res.statusCode = 200;
    req.on('end', () => {
        highlighter.highlight({
            "scopeName": filename,
            "filePath": filename,
            "fileContents": buffer,
        }, (err,html) => {
            res.write(html, '', () => { res.end() });
        });
    });
    req.on('data', (chunk) => {
        buffer += chunk;
    });
});
 
server.on('clientError', (err, socket) => {
    socket.end('HTTP/1.1 400 Bad Request\r\n\r\n');
});
 
server.listen(8000,'127.0.0.1');