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apiServer.js
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apiServer.js
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#!/usr/bin/env node
var fs = require('fs');
var express = require('express');
var algoliasearch = require('algoliasearch');
var _ = require('lodash');
var app = express();
var args = process.argv.slice(2);
var localMode = false;
var compress = require('compression');
var bodyParser = require('body-parser');
var marked = require('marked');
var allowCrossDomain = function (req, res, next) {
res.header('Access-Control-Allow-Credentials', true);
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
res.header('Access-Control-Allow-Headers', 'X-CSRF-Token, X-Requested-With, Accept, Accept-Version, Content-Length, Content-MD5, Content-Type, Date, X-Api-Version');
next();
};
if (process.env.LOCAL === 'true' || (args.length > 0 && (args[0] === '--local' || args[2] === '--local'))) {
console.log('local mode: on, gc() disabled!');
localMode = true;
} else {
console.log('local mode: off');
}
app.disable('x-powered-by');
app.use(bodyParser());
app.use(allowCrossDomain);
app.use(compress());
function humanOutput(res, json) {
res.header('Content-Type', 'text/html');
var htmlOutput = '<!doctype><html>' +
'<head><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/default.min.css" integrity="sha256-Zd1icfZ72UBmsId/mUcagrmN7IN5Qkrvh75ICHIQVTk=" crossorigin="anonymous"/></head><body>' +
'<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/highlight.min.js" integrity="sha256-/BfiIkHlHoVihZdc6TFuj7MmJ0TWcWsMXkeDFwhi0zw=" crossorigin="anonymous"></script>' +
'<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/languages/json.min.js" integrity="sha256-KPdGtw3AdDen/v6+9ue/V3m+9C2lpNiuirroLsHrJZM=" crossorigin="anonymous" defer></script>' +
'<script src="https://cdnjs.cloudflare.com/ajax/libs/json2/20160511/json2.min.js" integrity="sha256-Fsw5X9ZUnlJb302irkG8pKCRwerGfxSArAw22uG/QkQ=" crossorigin="anonymous"></script>' +
'<script defer>hljs.initHighlightingOnLoad();</script>' +
'<script defer>var output=' + JSON.stringify(json) + '; ' +
'document.write("<pre><code class=\'json\'>" + JSON.stringify(output,null,2) + "</code></pre>");</script>' +
'<script defer>console.log("%cThanks for using cdnjs! 😊", "font: 5em roboto; color: #e95420;");</script>' +
'</body></html>';
res.write(htmlOutput);
res.end();
htmlOutput = null;
}
function escapeHtml(unsafe) {
return unsafe
.replace(/&/g, "&")
.replace(/</g, "<")
.replace(/>/g, ">")
.replace(/"/g, """)
.replace(/'/g, "'");
}
function safeFields(unsafe) {
return _.map(unsafe, escapeHtml);
}
var packages = JSON.parse(fs.readFileSync('public/packages.min.json', 'utf8')).packages;
// build an indexed version of the packages (speed up lookup)
var packagesByName = {};
_.each(packages, function (library) {
packagesByName[library.name] = library;
});
packages = null;
var algoliaIndex = algoliasearch('2QWLVLXZB6', 'e16bd99a5c7a8fccae13ad40762eec3c').initIndex('libraries');
if (!localMode && (typeof global.gc !== 'undefined')) {
global.gc();
}
app.get('/libraries', function (req, res) {
app.set('json spaces', 0);
// format the results including optional `fields`
function formatResults(fields, hits) {
return _.map(hits, function (library) {
var data = {
name: library.name,
latest: 'https://cdnjs.cloudflare.com/ajax/libs/' + library.name + '/' + library.version + '/' + library.filename
};
_.each(fields, function (field) {
data[field] = library[field] || null;
});
return data;
});
}
res.setHeader('Expires', new Date(Date.now() + 360 * 60 * 1000).toUTCString());
var fields = safeFields((req.query.fields && req.query.fields.split(',')) || []);
var allhits = [];
new Promise(function (resolve, reject) {
var browser = algoliaIndex.browseAll(req.query.search || '', { typoTolerance: 'min' });
browser.on('result', function (content) {
allhits = allhits.concat(content.hits);
});
browser.on('error', function (error) {
reject(error);
});
browser.on('end', function () {
resolve();
});
}).then(function () {
var json = {
results: formatResults(fields, allhits),
total: allhits.length
};
if (req.query.output && req.query.output === 'human') {
humanOutput(res, json);
} else {
res.jsonp(json);
}
}).catch(function (error) {
res.status(500).send(error.message);
});
});
app.get('/libraries/:library', function (req, res) {
var results;
var fields = safeFields((req.query.fields && req.query.fields.split(',')) || []);
var ret = {};
app.set('json spaces', 0);
res.setHeader('Expires', new Date(Date.now() + 360 * 60 * 1000).toUTCString());
results = _.filter(packagesByName, function (library) {
if (library.name === req.params.library) {
return library;
}
return false;
});
if (fields.length > 0 && results.length > 0) {
_.each(fields, function (field) {
ret[field] = results[0][field] || null;
});
if (fields.indexOf('sri') > -1) {
try {
ret.sri = JSON.parse(fs.readFileSync('sri/' + req.params.library + '/' + results[0].version + '.json'))[results[0].filename];
} catch (err) {
ret.sri = null;
}
}
if (fields.indexOf('assets') > -1) {
_.each(ret.assets, function (asset) {
try {
asset.sri = JSON.parse(fs.readFileSync('sri/' + req.params.library + '/' + asset.version + '.json'));
} catch (e) {
asset.sri = {};
}
})
}
results[0] = ret;
} else if (!fields && results.length > 0) {
try {
results[0].sri = JSON.parse(fs.readFileSync('sri/' + req.params.library + '/' + results[0].version + '.json'))[results[0].filename];
} catch (err) {
results[0].sri = null;
}
_.each(results[0].assets, function (asset) {
try {
asset.sri = JSON.parse(fs.readFileSync('sri/' + req.params.library + '/' + asset.version + '.json'));
} catch (e) {
asset.sri = {};
}
})
}
if (results.length > 0) {
if (req.query.output && req.query.output === 'human') {
humanOutput(res, results[0]);
} else {
res.jsonp(results[0]);
}
} else {
res.jsonp({});
}
});
app.get('/libraries/:library/tutorials', function (req, res) {
var results = [], ret = {};
var fields = safeFields((req.query.fields && req.query.fields.split(',')) || []);
app.set('json spaces', 0);
res.setHeader('Expires', new Date(Date.now() + 360 * 60 * 1000).toUTCString());
try {
results = fs.readdirSync('tutorials/' + req.params.library);
} catch (e) {
// If no tutorials, this will error and results will be an empty array
}
_.each(results, function (tutorial) {
try {
fs.readFileSync('tutorials/' + req.params.library + '/' + tutorial + '/index.md', 'utf8');
var data = JSON.parse(fs.readFileSync('tutorials/' + req.params.library + '/' + tutorial + '/tutorial.json', 'utf8'));
if (fields.length > 0) {
var retData = {};
_.each(fields, function (field) {
retData[field] = data[field] || null;
});
ret[tutorial] = retData;
} else {
ret[tutorial] = data;
}
} catch (e) {
// If index.md or tutorial.json doesn't exist (or not valid), just skip this result
}
});
if (req.query.output && req.query.output === 'human') {
humanOutput(res, ret);
} else {
res.jsonp(ret);
}
});
app.get('/libraries/:library/tutorials/:tutorial', function (req, res) {
var results = {};
var fields = safeFields((req.query.fields && req.query.fields.split(',')) || []);
app.set('json spaces', 0);
res.setHeader('Expires', new Date(Date.now() + 360 * 60 * 1000).toUTCString());
try {
var data = JSON.parse(fs.readFileSync('tutorials/' + req.params.library + '/' + req.params.tutorial + '/tutorial.json', 'utf8'));
var raw = fs.readFileSync('tutorials/' + req.params.library + '/' + req.params.tutorial + '/index.md', 'utf8');
marked.setOptions({
renderer: new marked.Renderer(),
gfm: true,
tables: true,
breaks: false,
pedantic: false,
sanitize: false,
smartLists: false,
smartypants: false,
langPrefix: ''
});
data.markdown = raw;
data.html = marked(raw);
if (fields.length > 0) {
_.each(fields, function (field) {
results[field] = data[field] || null;
});
} else {
results = data;
}
if (req.query.output && req.query.output === 'human') {
humanOutput(res, results);
} else {
res.jsonp(results);
}
} catch (e) {
// If index.md or tutorial.json doesn't exist (or not valid), just return nothing
res.jsonp({});
}
});
app.get('/', function (req, res) {
res.redirect('https://cdnjs.com/api');
});
var PORT = process.env.PORT || 5050;
app.listen(PORT, function () {
console.log('Listening on ' + PORT);
});