Mounting and other manipulations

- Added the option to mount specific directories via the mount parameter in the config.json config file.
- updated readme

README.md

@@ -21,7 +21,17 @@ Modules
 
 Details
 ----
-This web server uses folders for every type of file (depending on the file's ending) and routes to the folders. There are also global files, that are implemented in every html via dom-manipulation. The behaviour for every file extension can be configured in the config.json This server uses vue.js and jquery to make the website as interactive, as possible. This server works with https. To run it. it needs to have access to the folder .ssh in the same directory where a valid cert.pem and a valid key.pem is are existing.
+This web server uses folders for every type of file (depending on the file's ending) and routes to the folders. There are also global files, that are implemented in every html via dom-manipulation. The behaviour for every file extension can be configured in the config.json This server uses vue.js and jquery to make the website as interactive, as possible. This server works with https. To run it. it needs to have access to the folder .ssh in the same directory where a valid cert.pem and a valid key.pem is are existing. Specific directories can be mounted via the mounting parameter. The pattern is:
+``` json
+{
+  "mounts": [
+    {
+      "mount": "mountpath",
+      "path": "path"
+    }
+  ]
+}
+```
 
 Roadmap
 ----

server.js

@@ -6,6 +6,7 @@ const https = require('https'),
   perfy = require('perfy'),
   winston = require('winston'),
   DailyRotateFile = require('winston-daily-rotate-file'),
+  path = require('path'),
 // args
   args = require('args-parser')(process.argv), // create an args parser
 // ressources
@@ -62,18 +63,18 @@ const https = require('https'),
     key: fs.readFileSync('.ssh/key.pem'),   // the key-file
     cert: fs.readFileSync('.ssh/cert.pem')  // the certificate-file
   },
-  port = args.port || 80,
+  port = args.port || 443, // the port the server is running on. It's the https standard
   routes = config.routes || {
     ".html": {
-      "path": "./res/html",
+      "path": "./res/html", // standard route to the html files
       "mime": "text/html"
     },
     ".js": {
-      "path": "./res/scripts",
+      "path": "./res/scripts", // standard route to the script files
       "mime": "text/javascript"
     }
-  }
-  ; // The port of the web server.
+  },
+  mounts = config.mounts; // mounts are more important than routes.
 
 // --- functional declaration part ---
 
@@ -88,13 +89,13 @@ function main() {
 
       perfy.start('response-calculation');  // caluclate the response time
       let url = urlparse.parse(req.url); // parse the url
-      let path = url.pathname;  // set path to the urls pathname
-      logger.debug({msg: 'Got URL by using url package','url': url, 'path': path});
+      let uri = url.pathname;  // set uri to the urls uriame
+      logger.debug({"msg": 'Got URL by using url package','url': url, 'path': uri});
 
-      let [response, mime] = getResponse(path); // get a response for the url path
+      let [response, mime] = getResponse(uri); // get a response for the url path
       logger.debug({'response-length': response.length, 'mime-type': mime});
 
-      res.writeHead(200, {"Content-Type": mime}); // write the mime as head
+      res.writeHead(200, {"Content-Type": mime || "text/plain"}); // write the mime as head
       res.end(response);  // write the response
       let execTime = perfy.end('response-calculation').fullMilliseconds; // get the execution time
       logger.debug("Response-Time: " + execTime + " ms for " + req.url, "debug"); // log the execution time
@@ -103,6 +104,7 @@ function main() {
   } catch (error) {
     logger.error(error);
     logger.info("Shutting Down...");
+    winston.end();
     return false;
   }
 }
@@ -113,6 +115,7 @@ function main() {
  * @return {String}          A string that represents the file-extension.
  */
 function getExtension(filename) {
+  if (!filename) return null;
   try {
     let exts = filename.match(/\.[a-z]+/g); // get the extension by using regex
     if (exts) return exts[exts.length - 1]; // return the found extension
@@ -124,36 +127,55 @@ function getExtension(filename) {
 }
 
 /**
- * Returns a string that depends on the path. It gets the data from the routes variable.
- * @param  {String} path Normally a file-name. Depending on the extension, an other root-path is choosen.
+ * Returns a string that depends on the uri It gets the data from the routes variable.
+ * @param  {String} uriNormally a file-name. Depending on the extension, an other root-uriis choosen.
  * @return {String}      An Array containing (Either the files content or an error message) and the mime-type.
  */
-function getResponse(path) {
-  logger.verbose({'msg':'calculating response', 'path': path});
+function getResponse(uri) {
+  if (!uri || uri == "/") uri = "/index.html"; // uri redirects to the index.html if it is not set or if it is root
+  logger.verbose({'msg':'calculating response', 'path': uri});
   try {
     // get the file extension
-    let extension = getExtension(path);
-    // returns the home-html file if the path is root.
-    if (path == "/") return [fs.readFileSync("./glob/home.html"), "text/html"];
-    // returns the global script or css if the extension is css or js and the root-path is glob.
-    if (path.includes("/glob") && extension  == ".css" || getExtension(path) == ".js") {
-      if (extension == ".css") return [fs.readFileSync("." + path), "text/css"];
-      else return [fs.readFileSync("." + path), "text/javascript"];
+    let extension = getExtension(uri);
+    // returns the global script or css if the extension is css or js and the root-uriis glob.
+    if (uri.includes("/glob") && extension  == ".css" || extension == ".js") {
+      if (extension == ".css") return [fs.readFileSync("." + uri), "text/css"];
+      else return [fs.readFileSync("." + uri), "text/javascript"];
     }
-    let route = routes[extension];
-    if (!route) return ["Not Allowed", "text/plain"];
-    let rf = fs.readFileSync;
-    if (extension == ".html") return [formatHtml(rf(route["path"]+path)), route["mime"]];
-    return [rf(route["path"]+path), route["mime"]];
+    let mount = getMount(uri); // get mount for uri it will be uses as path later instead of route
+    let route = routes[extension]; // get the route from the extension json
+    if (!route) return ["Not Allowed", "text/plain"]; // return not allowed if no route was found
+    let rf = fs.readFileSync; // shorten filesync
+    if (extension == ".html") return [formatHtml(rf(mount || path.join(route["path"]+uri))), route["mime"]]; // format if html and return
+    return [rf(mount || route["path"]+uri), route["mime"]]; // return without formatting if it's not an html file. (htm files won't be manipulated)
     // test the extension for differend file types.
-    logger.verbose({'msg': 'Error', 'path': path})
-    return ["Error with url", "text/plain"];
+    logger.verbose({'msg': 'Error', 'path': uri})
+    return ["Error with url", "text/plain"]; // return an error if above has not returned
   } catch (error) {
     logger.error(error);
-    return "Error";
+    return ["Error", "text/plain"];
   }
 }
 
+/**
+ * gets all mounted paths and returns the modified uri.
+ * @param  {String} uri The uri
+ * @return {String}     The uri that points to the mounted path
+ */
+function getMount(uri) {
+  if (mounts){ // if mounts are set
+    for (var mount of mounts){ // for each set mount
+      if (mount.mount && mount.path) { // if the mount has the mount parameter and the path parameter
+        let regEx = RegExp(mount.mount); // create a regex from the mount
+        if (uri.match(regEx)) { // if there is a match
+          return uri.replace(regEx, mount.path); // returnthe modified uri
+        }
+      }
+    }
+  }
+  return false;
+}
+
 /**
  * Creates a css DOM element with href as source
  * @param  {Object} document A html DOM
@@ -187,7 +209,7 @@ function createScriptLinkElement(document, src) {
  * @return {String}            A html-string that represents a document.
  */
 function formatHtml(htmlstring) {
-  logger.verbose({'msg': 'Formatting HTML', 'htmlstring': htmlstring});
+  logger.debug({'msg': 'Formatting HTML', 'htmlstring': htmlstring});
   try {
     let dom = new JSDOM(htmlstring);  // creates a dom from the html string
     let document = dom.window.document;