papnkukn · October 2, 2022 07:55 · papnkukn · Oct 2, 2022 · papnkukn · Oct 2, 2022
diff --git a/server.js b/server.js
 /*** A very simple pastebin clone ***/

 const fs = require('fs');
 const path = require('path');
 const http = require('http');

 const host = process.env.NODE_HOST || "0.0.0.0";
 const port = process.env.NODE_PORT || 3000;
 const datadir = process.env.NODE_DATA_DIR || "data";

 if (!fs.existsSync(datadir)) {
  console.error("Data directory does not exist: " + datadir);
  process.exit(1);
 }

 function htmlencode(c) {
  c = c.replace(/&/g, '&amp;');
  c = c.replace(/</g, '&lt;');
  c = c.replace(/>/g, '&gt;');
  return c;
 }

 function regex(url) {
  let m = /^\/?([A-Za-z0-9\-]+)$/g.exec(url);
  return m ? m[1] : null;
 }

 function render(model) {
  let content = htmlencode(model.content);
  let html = `<!DOCTYPE html>
 <html lang="en">
 <head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" integrity="sha384-xOolHFLEh07PJGoPkLv1IbcEPTNtaed2xpHsD9ESMhqIYd0nLMwNLD69Npy4HI+N" crossorigin="anonymous">
  <title>Pastebin</title>
 </head>
 <body style="background: #eee;">
  <form action="/${model.id}" method="post">
  
    <div class="container-fluid mt-3">
    
      <div class="row">
        <div class="col-12 d-flex">
          <h3 class="text-monospace">Pastebin <a href="/${model.id}" class="text-primary text-monospace">${model.id}</a></h3>
          <div class="ml-auto">
            <a href="/" class="btn btn-sm btn-outline-primary" accesskey="q">New</a>
            <button class="btn btn-sm btn-success" type="submit" accesskey="s">Save</button>
          </div>
        </div>
        <div class="col-12">
          <div class="form-group">
            <textarea autofocus name="content" placeholder="Paste some text..." rows="35" class="form-control text-monospace w-100 h-100">${content}</textarea>
          </div>
        </div>
      </div>
      
    </div>
    
  </form>
 </body>
 </html>`;
  return html;
 }

 const server = http.createServer(function(request, response) {
  //Debug: console.log(request.method + " " + request.url);
  
  //Index page: GET /
  if (request.method == "GET" && request.url == "/") {
    let id = Math.random().toString(36).substr(2, 9);
    let model = { id, mode: "new", content: "" };
    response.writeHead(200, { "Content-Type": "text/html" });
    return response.end(render(model));
  }
  
  //View content: GET /:id where :id can be A-Z, a-z, 0-9, and -
  if (request.method == "GET" && regex(request.url)) {
    let id = regex(request.url);
    let file = path.join(datadir, id) + ".txt";
    let content = fs.existsSync(file) ? fs.readFileSync(file, "utf-8") : "";
    let model = { id, mode: "edit", content };
    response.writeHead(200, { "Content-Type": "text/html" });
    return response.end(render(model));
  }
  
  //Save content: POST /:id where :id can be A-Z, a-z, 0-9, and -
  if (request.method == "POST" && regex(request.url)) {
    let id = regex(request.url);
    
    let body = "";
    request.on('data', function(data) {
      body += data;
    });
    request.on('end', function() {
      let value = body.substring("content=".length);
      let content = decodeURIComponent(value).replace(/\+/g, " ");
      let file = path.join(datadir, id) + ".txt";
      fs.writeFileSync(file, content);
      response.writeHead(302, { "Location": "/" + id });
      return response.end();
    });
    
    return;
  }
  
  //Delete content: DELETE /:id where :id can be A-Z, a-z, 0-9, and -
  if (request.method == "DELETE" && regex(request.url)) {
    let id = regex(request.url);
    let file = path.join(datadir, id) + ".txt";
    fs.existsSync(file) ? fs.unlinkSync(file) : null;
    response.writeHead(302, { "Location": "/" });
    return response.end();
  }
  
  //404 Not Found
  response.writeHead(404, { "Content-Type": "text/plain" });
  response.end("404 Not Found");
 });

 server.listen(port, host);
 console.log(`Listening at http://${host}:${port}`);
	/* A very simple pastebin clone */

	const fs = require('fs');
	const path = require('path');
	const http = require('http');

	const host = process.env.NODE_HOST \|\| "0.0.0.0";
	const port = process.env.NODE_PORT \|\| 3000;
	const datadir = process.env.NODE_DATA_DIR \|\| "data";

	if (!fs.existsSync(datadir)) {
	console.error("Data directory does not exist: " + datadir);
	process.exit(1);
	}

	function htmlencode(c) {
	c = c.replace(/&/g, '&');
	c = c.replace(/</g, '<');
	c = c.replace(/>/g, '>');
	return c;
	}

	function regex(url) {
	let m = /^\/?([A-Za-z0-9\-]+)$/g.exec(url);
	return m ? m[1] : null;
	}

	function render(model) {
	let content = htmlencode(model.content);
	let html = `<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" integrity="sha384-xOolHFLEh07PJGoPkLv1IbcEPTNtaed2xpHsD9ESMhqIYd0nLMwNLD69Npy4HI+N" crossorigin="anonymous">
	<title>Pastebin</title>
	</head>
	<body style="background: #eee;">
	<form action="/${model.id}" method="post">

	<div class="container-fluid mt-3">

	<div class="row">
	<div class="col-12 d-flex">
	<h3 class="text-monospace">Pastebin <a href="/${model.id}" class="text-primary text-monospace">${model.id}</a></h3>
	<div class="ml-auto">
	<a href="/" class="btn btn-sm btn-outline-primary" accesskey="q">New</a>
	<button class="btn btn-sm btn-success" type="submit" accesskey="s">Save</button>
	</div>
	</div>
	<div class="col-12">
	<div class="form-group">
	<textarea autofocus name="content" placeholder="Paste some text..." rows="35" class="form-control text-monospace w-100 h-100">${content}</textarea>
	</div>
	</div>
	</div>

	</div>

	</form>
	</body>
	</html>`;
	return html;
	}

	const server = http.createServer(function(request, response) {
	//Debug: console.log(request.method + " " + request.url);

	//Index page: GET /
	if (request.method == "GET" && request.url == "/") {
	let id = Math.random().toString(36).substr(2, 9);
	let model = { id, mode: "new", content: "" };
	response.writeHead(200, { "Content-Type": "text/html" });
	return response.end(render(model));
	}

	//View content: GET /:id where :id can be A-Z, a-z, 0-9, and -
	if (request.method == "GET" && regex(request.url)) {
	let id = regex(request.url);
	let file = path.join(datadir, id) + ".txt";
	let content = fs.existsSync(file) ? fs.readFileSync(file, "utf-8") : "";
	let model = { id, mode: "edit", content };
	response.writeHead(200, { "Content-Type": "text/html" });
	return response.end(render(model));
	}

	//Save content: POST /:id where :id can be A-Z, a-z, 0-9, and -
	if (request.method == "POST" && regex(request.url)) {
	let id = regex(request.url);

	let body = "";
	request.on('data', function(data) {
	body += data;
	});
	request.on('end', function() {
	let value = body.substring("content=".length);
	let content = decodeURIComponent(value).replace(/\+/g, " ");
	let file = path.join(datadir, id) + ".txt";
	fs.writeFileSync(file, content);
	response.writeHead(302, { "Location": "/" + id });
	return response.end();
	});

	return;
	}

	//Delete content: DELETE /:id where :id can be A-Z, a-z, 0-9, and -
	if (request.method == "DELETE" && regex(request.url)) {
	let id = regex(request.url);
	let file = path.join(datadir, id) + ".txt";
	fs.existsSync(file) ? fs.unlinkSync(file) : null;
	response.writeHead(302, { "Location": "/" });
	return response.end();
	}

	//404 Not Found
	response.writeHead(404, { "Content-Type": "text/plain" });
	response.end("404 Not Found");
	});

	server.listen(port, host);
	console.log(`Listening at http://${host}:${port}`);