Created the core
- server.js - glob and files script.js and style.css - important folders in respull/4/head
Julius Riegel
6 years ago
parent
b1f7473441
commit
ab15494347
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rcn-frontserver
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rcn-frontserver
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====
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#About
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This is the front-web-server of the Raspberry pi Communication network.
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More details following soon.
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// -- Functions --
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/**
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* binds the data for each element
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*/
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function bindData(){
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let mods = $('model');
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mods.each(function(){
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let model = $(this);
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if (model.attr('refresh-interval') != undefined) {
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bindModelData(model);
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setInterval(()=> { bindModelData(model) }, model.attr('refresh-interval'));
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}
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else bindModelData(model);
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});
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}
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function bindModelData(model) {
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$.get(model.attr('src'), function(data){
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$('*[model='+model.attr('name')+']').each(function() {
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let elem = $(this);
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elem.html(getDataByPath(JSON.parse(data), elem.attr('datapath')));
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})
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});
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}
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/**
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* Returns the data of an array by accessing the given path-string
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* @param {JSON-Object} array Contains the data.
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* @param {String} path The path to the wanted data.
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* @return {Object} Returns anything that the path points to.
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*/
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function getDataByPath(array, path) {
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let data = array;
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path.split('.').forEach(function(p){
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data = data[p];
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});
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return data;
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}
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// -- Events --
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// Define what happens onLoad
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$(document).ready(function(){
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bindData();
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});
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// requirement
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const https = require('https'),
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fs = require('fs'),
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urlparse = require('url'),
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{ JSDOM } = require('jsdom'),
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perfy = require('perfy'),
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winston = require('winston'),
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DailyRotateFile = require('winston-daily-rotate-file'),
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// args
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args = require('args-parser')(process.argv),
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// ressources
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defaultCss = "/glob/style.css",
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defaultJs = "/glob/script.js",
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// logging config using winston
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fileLoggingFormat = winston.format.printf(info => {
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return `${info.timestamp} ${info.level.toUpperCase()}: ${JSON.stringify(info.message)}`;
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});
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consoleLoggingFormat = winston.format.printf(info => {
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return `${info.timestamp} [${info.level}] ${JSON.stringify(info.message)}`;
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});
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loggingFullFormat = winston.format.combine(
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winston.format.splat(),
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winston.format.timestamp({
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format: 'MM-DD HH:mm:ss.SSS'
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}),
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fileLoggingFormat
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),
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logger = winston.createLogger({
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level: winston.config.npm.levels,
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format: loggingFullFormat,
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transports: [
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new winston.transports.Console({
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format: winston.format.combine(
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winston.format.colorize(),
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winston.format.splat(),
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winston.format.timestamp({
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format: 'YY-MM-DD HH:mm:ss.SSS'
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}),
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consoleLoggingFormat
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),
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level: args.loglevel || 'info'
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}),
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new winston.transports.File({
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level: 'debug',
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filename: './.log/rcn-frontserver.log'
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}),
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new DailyRotateFile({
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level: 'verbose',
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filename: './.log/frontserver-%DATE%.log',
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datePattern: 'YYYY-MM-DD',
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zippedArchive: true,
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maxSize: '32m',
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maxFiles: '30d'
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})
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]
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}),
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// serveroptions
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options = {
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key: fs.readFileSync('.ssh/key.pem'), // the key-file
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cert: fs.readFileSync('.ssh/cert.pem') // the certificate-file
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},
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port = args.port || 80; // The port of the web server.
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// --- functional declaration part ---
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/**
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* Creates a server running on port 80 with tls enabled.
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* @return {boolean} Returns false if the server stopped by error.
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*/
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function main() {
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try {
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https.createServer(options, function(req, res) {
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logger.verbose({'msg': 'Received request', 'method': req.method, 'url': req.url});
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perfy.start('response-calculation'); // caluclate the response time
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let url = urlparse.parse(req.url); // parse the url
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let path = url.pathname; // set path to the urls pathname
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logger.debug({msg: 'Got URL by using url package','url': url, 'path': path});
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let [response, mime] = getResponse(path); // get a response for the url path
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logger.debug({'response-length': response.length, 'mime-type': mime});
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res.writeHead(200, {"Content-Type": mime}); // write the mime as head
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res.end(response); // write the response
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let execTime = perfy.end('response-calculation').fullMilliseconds; // get the execution time
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logger.debug("Response-Time: " + execTime + " ms for " + req.url, "debug"); // log the execution time
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}).listen(port); // server listens on port specified in the parameter
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} catch (error) {
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logger.error(error);
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logger.info("Shutting Down...");
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return false;
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}
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}
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/**
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* returns the extension of a file for the given filename.
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* @param {String} filename The name of the file.
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* @return {String} A string that represents the file-extension.
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*/
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function getExtension(filename) {
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try {
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let exts = filename.match(/\.[a-z]+/g); // get the extension by using regex
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if (exts) return exts[exts.length - 1]; // return the found extension
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else return null; // return null if no extension could be found
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} catch (error) {
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logger.warn(error);
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return null;
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}
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}
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/**
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* Returns a string that depends on the path.
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* @param {String} path Normally a file-name. Depending on the extension, an other root-path is choosen.
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* @return {String} An Array containing (Either the files content or an error message) and the mime-type.
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*/
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function getResponse(path) {
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logger.verbose({'msg':'calculationg response', 'path': path});
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try {
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// get the file extension
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let extension = getExtension(path);
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// returns the home-html file if the path is root.
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if (path == "/") return [fs.readFileSync("./glob/home.html"), "text/html"];
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// returns the global script or css if the extension is css or js and the root-path is glob.
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if (path.includes("/glob") && extension == ".css" || getExtension(path) == ".js") {
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if (extension == ".css") return [fs.readFileSync("." + path), "text/css"];
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else return [fs.readFileSync("." + path), "text/javascript"];
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}
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// test the extension for differend file types.
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switch (extension) {
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case '.html':
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case '.htm':
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return [formatHtml(fs.readFileSync("./res/html/" + path)), "text/html"];
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case '.css':
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return [fs.readFileSync("./res/css/"+path), "text/css"];
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case '.js':
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return [fs.readFileSync("./res/scripts/"+path), "text/javascript"];
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case '.json':
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return [fs.readFileSync("./res/data/"+path), "text/plain"];
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// return some images
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case '.ico':
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return [fs.readFileSync("./res/img/"+path), "image/x-icon"]
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case '.jpg':
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return [fs.readFileSync("./res/img/"+path), "image/jpeg"];
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case '.png':
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return [fs.readFileSync("./res/img/"+path), "image/png"];
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// return some videos
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case '.mp4':
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return [fs.readFileSync("./res/vid/"+path), "video/mpeg"];
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// default return
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default:
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// if the extension is not in those above, the access is not allowed.
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logger.verbose({'msg': 'Illegal request', 'path': path})
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return ["Not Allowed", "text/plain"];
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}
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} catch (error) {
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logger.error(error);
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return "Error";
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}
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}
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/**
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* Formats the html string by adding a link to the standard css and to the standard javascript file.
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* @param {String} htmlstring A string read from an html file or a html document string itself.
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* @return {String} A html-string that represents a document.
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*/
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function formatHtml(htmlstring) {
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logger.verbose({'msg': 'Formatting HTML', 'htmlstring': htmlstring});
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try {
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let dom = new JSDOM(htmlstring); // creates a dom from the html string
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let document = dom.window.document;
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let head = document.getElementsByTagName('head')[0]; // gets the documents head
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let css = document.createElement('link'); // create a link for the css embeding
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css.setAttribute("rel", "stylesheet");
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css.setAttribute("type", "text/css");
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css.setAttribute("href", defaultCss);
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head.prepend(css); // prepend the link to the head
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let js = document.createElement('script'); // create a script for js embedding
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js.setAttribute("type", "text/javascript");
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js.setAttribute("src", defaultJs);
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head.prepend(js); // prepend the script to the head
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let jquery = document.createElement('script'); // create a script for js embedding
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jquery.setAttribute("type", "text/javascript");
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jquery.setAttribute("src", "/glob/jquery.js");
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head.prepend(jquery); // prepend the script to the head
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return dom.serialize(); // return a string of the document
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} catch(error) {
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logger.error(error);
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return htmlstring;
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}
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}
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// Executing the main function
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if (typeof require != 'undefined' && require.main == module) {
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logger.exceptions.handle(
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new winston.transports.File({
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filename: './.log/frontserver-exceptions.log'
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})
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);
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logger.info("Starting up... "); // log the current date so that the logfile is better to read.
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main();
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}
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