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'use strict';
const express = require('express');
const logger = require('morgan');
const bodyParser = require('body-parser');
const bootlint = require('bootlint');
const HTML_MIME_TYPES = [
'text/html',
'application/xhtml+xml'
];
// For context, unminified bootstrap.css + bootstrap.js is ~200KiB,
// and JSFiddle inlines the contents of the CSS and JS panes of its editor into the resulting HTML.
const MAX_HTML_SIZE = '1MB';
function disabledIdsFor(req) {
const rawIds = req.query.disable;
if (!rawIds) {
return [];
}
return rawIds.split(',');
}
function lintsFor(html, disabledIds) {
const lints = [];
const reporter = lint => {
let output = false;
if (lint.elements && lint.elements.length) {
const {elements} = lint;
lint.elements = undefined;
elements.each((_, element) => {
if (element.startLocation) {
const locatedLint = {...lint};
locatedLint.location = element.startLocation;
lints.push(locatedLint);
output = true;
}
});
}
if (!output) {
lint.elements = undefined;
lints.push(lint);
}
};
bootlint.lintHtml(html, reporter, disabledIds);
return lints;
}
const routes = express.Router(); // eslint-disable-line new-cap
routes.get('/', (req, res) => {
res.status(200).json({
status: 200,
message: 'Bootlint is online!'
});
});
routes.post('/', (req, res) => {
const isHtml = HTML_MIME_TYPES.some(type => req.is(type));
if (!isHtml) {
res.status(415).json({
status: 415,
message: 'Unsupported Media Type',
details: 'Content-Type was not an HTML MIME type'
});
return;
}
res.format({
'application/json'() {
const disabledIds = disabledIdsFor(req);
const lints = lintsFor(req.body.html, disabledIds);
res.status(200).json(lints);
},
default() {
res.status(406).json({
status: 406,
message: 'Not Acceptable',
details: '"Accept" header must allow MIME type application/json'
});
}
});
});
const app = express();
app.use(logger('dev'));
for (const type of HTML_MIME_TYPES) {
app.use(bodyParser.text({
type,
limit: MAX_HTML_SIZE
}));
}
app.use('/', routes);
// catch 404 and forward to error handler
app.use((req, res, next) => {
const err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handlers
// development error handler
// will print stacktrace
/* eslint-disable no-unused-vars */
app.use((err, req, res, next) => {
const isHttpErr = Boolean(err.status);
if (!isHttpErr) {
err.status = 500;
}
const errJson = {
status: err.status,
message: err.message
};
if (!isHttpErr) {
errJson.stack = err.stack;
}
res.status(err.status).json(errJson);
});
/* eslint-enable no-unused-vars */
module.exports = app;
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