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- Rewrote README.md
- Added --help flag for script
- server.json now uses 2-spaces-indentation
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Trivernis 6 years ago
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102
README.md
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rcn-frontserver <img src="https://raw.githubusercontent.com/Trivernis/rcn-frontserver/develop/res/img/RCN-Logo.png" height="100px" width="auto"></img> rcn-frontserver <img src="https://raw.githubusercontent.com/Trivernis/rcn-frontserver/develop/res/img/RCN-Logo.png" height="100px" width="auto"></img>
==== ====
This is the front-end web-server of the Raspberry Communication Network *(that is still in development)*.
About Contents
---- ----
This is the front-web-server of the Raspberry pi Communication network. 1. [Requirements](#requirements)
2. [Getting Started](#getting-started)
3. [Arguments](#arguments)
4. [Configuration](#configuration)
1. [Routes for each type of file](#routes-for-each-type-of-file)
2. [Mounting external folders](#mounting-external-folders)
5. [Cool Features](#cool-features)
6. [Roadmap](#roadmap)
Modules Requirements
---- ----
**NodeJS** You need to have Node.js installed to run this script. Just in case update your npm with the command:
- winston ```commandline
- pkg npm install -g npm@latest
- perfy ```
- jsdom
- winston-daily-rotate-file Getting started
- args-parser ----
- node-sass To install the dependencies listed above, run the following from the commandline.
```commandline
**Embedded in the html-file** npm install
- JQuery ```
- Vue.js Now you can run the server by typing:
```commandline
Details node server.js
```
Arguments
---- ----
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: Just type `node server.js -h` or
```commandline
Usage: server.js [options]
Options:
-h, --help show this help message and exit
-p, --port define the port for the server to run on
--loglevel define at which level the console should output
--test start the server and exit after 10 seconds
```
Configuration
----
*This configuration applies to the server.json.*
### Routes for each type of file
In the server.json all common web file-types have their own configuration at **routes**.
```json
{
"routes": {
".html": {
"path": "./res/html/",
"mime": "text/html"
}
}
}
```
In the configuration a path and mime-type is defined. When the server starts recieves a request, it reads the configuration and searches for the file in the specific route. If the file exists it gets transportet with the defined mime-type. The type of the file is determined with the file's extension.
### Mounting external folders
It is also possible to mount additional folders into the web-application by defining them at **mounts**. Mounts are more important than routes so when the server recieves a request, it first looks if the request-url has a mounted directory (or file).
```json ```json
{ {
"mounts": [ "mounts": [
{ {
"mount": "mountpath", "path": "./path/to/directory/",
"path": "path" "mount": "/mount/"
} }
] ]
} }
You can embed sass files as link elements in html-pages. The sass files will be preprocessed to css before send to clients. The result will also be cached and the sass file will be watched for changes. If changes occur, the file will be preprocessed anew on the next request to the file. If not, the cached file will be send. HTML-files will also be cached because they are also manipulated by the preprocessor. All cached files are watched for changes. I.e. if changes to the file are detected the caching function isCached returns false.
``` ```
The path Attribute defines the mounted directory (of file) on the local filesystem. The mount attribute defines where the directory is mounted in the web-application. The mount-path supports RegEx strings (the value is interpreted as a regular Expression by default).
Cool features
---
### Embedding SASS-Stylesheets, Vue.js and jQuery
This server automatically embeds Vue.js, jQuery and the *script.js* and *style.sass* stored in *./glob*. And yeah, that's right. You can embed .sass-files. When encountering a .sass file, the server compiles it into .css. The result will then be stored in the *./.cache* directory. The server also detects changes on the original file and refreshes the cached file when the change was detected. The refreshing only happens, when the file was requested.
Roadmap Roadmap
---- ----
**Done** - [x] SASS-Files and caching of preprocessed files
- SASS-Files and caching of preprocessed files - [x] Mounting of folders or files on other locations (by using the config.json)
**ToDo** - [x] A package.json because it seems to be important nowadays
- Mounting of folders or files on other locations (by using the config.json) - [x] HTTP-Statuscode integration with specific pages
- a package.json because it seems to be important nowadays - [ ] Handling POST-Methods
- [ ] Integrating Backend-Applications via a standardized JSON-interface
- [ ] Change from JSON to CSON and consider this in the standardized interface

28
server.js
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// requirement // requirement
var protocoll = require('https'); let protocoll = require('https'); // if there are no certificates protocoll will be set to require(http)
const fs = require('fs'), const fs = require('fs'),
urlparse = require('url'), urlparse = require('url'),
perfy = require('perfy'), perfy = require('perfy'),
@ -153,12 +153,12 @@ function getMount(uri) {
if (mount.mount && mount.path) { // if the mount has the mount parameter and the path parameter 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 let regEx = RegExp(mount.mount); // create a regex from the mount
if (uri.match(regEx)) { // if there is a match if (uri.match(regEx)) { // if there is a match
logger.debug(regEx.toString() + " returns a result");
return uri.replace(regEx, mount.path); // return the modified uri return uri.replace(regEx, mount.path); // return the modified uri
} }
} }
} }
} }
return false;
} }
/** /**
@ -170,9 +170,27 @@ function cleanup() {
logger.end(); // let the logger finish all operations logger.end(); // let the logger finish all operations
} }
/**
* Offers help when the function is called via the --help flag
*/
function help() {
console.log("\nUsage: server.js [options]\n\n" +
"Options:\n" +
" -h, --help show this help message and exit\n" +
" --port define the port for the server to run on\n" +
" --loglevel define at which level the console should output\n" +
" --test start the server and exit after 10 seconds\n");
process.exit(0);
}
// Executing the main function // Executing the main function
if (typeof require !== 'undefined' && require.main === module) { if (typeof require !== 'undefined' && require.main === module) {
// do arg specific operations
if (args.help || args.h) help();
if (args.test) setTimeout(() => process.exit(0), 10000); // if in testing mode, exit after 10 seconds
utils.Cleanup(cleanup); // set the cleanup function utils.Cleanup(cleanup); // set the cleanup function
logger.exceptions.handle( logger.exceptions.handle(
new winston.transports.File({ new winston.transports.File({
filename: './.log/frontserver-exceptions.log' filename: './.log/frontserver-exceptions.log'
@ -184,9 +202,7 @@ if (typeof require !== 'undefined' && require.main === module) {
cert: fs.readFileSync('.ssh/cert.pem') // the certificate-file cert: fs.readFileSync('.ssh/cert.pem') // the certificate-file
}; };
} else protocoll = require('http'); // if no certs could be found start the server as http-server } else protocoll = require('http'); // if no certs could be found start the server as http-server
logger.info("Starting up... "); // log the current date so that the logfile is better to read. logger.info("Starting up... "); // log the current date so that the logfile is better to read.
if (args.test) { main(); // execute the main function
setTimeout(() => process.exit(0), 10000); // if in testing mode, exit after 10 seconds
}
main();
} }

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