Ming-Tang/MainPage.html

## filewiki.js
var http = require('http'),
  url = require('url'),
  fs = require('fs'),
  qs = require('querystring');

const MAINPAGE = 'MainPage';

function clean(x) {
  return x.replace(/[^a-zA-Z0-9_-]/g, '');
}

function ent(x) {
  return x.replace('&', '&amp;').replace('<', '&lt;').replace('"', '&quot;');
}

function tt(title) {
  return clean(title[0] || '') || MAINPAGE;
}

function errorPage(request, response, e) {
  response.writeHead(500, {'Content-Type': 'text/plain'});
  response.end(e + "");
}

function header(title) {
  /* SYNTAX:
       return
         "str"
     =>
       return;
         "str";
   */
  return ""
    + "<!DOCTYPE html><html><head><title>"
    + title
    + "</title></head>";
}

function parsePost(p) {
  pairs = p.split('&');
  var res = { };
  for (var i = 0; i < p.length; i ++) {
    var pair = pairs[i].split('=');
    res[unescape(pair[0])] = unescape(pair[1]);
  }
  return res;
}

function redirect(request, response, url, body) {
  response.writeHead(301, {'Content-Type': 'text/html', 'Location': url});
  response.end(body || "");
}

var handlers = {
  page: function(title, request, response) {
    title = tt(title);
    var mtime, data;
    l: {
      try {
        mtime = fs.statSync(title + ".html").mtime;
        data = fs.readFileSync(title + ".html", 'UTF-8');
        break l;
      } catch (e) {
        response.writeHead(404, {'Content-Type': 'text/html'});
        response.end(
          header(title)
          + "<body><div class='nopage'>"
          + "<p>" + e + "</p>"
          + "<p><em>This page does not exist. Do you want to create it?</em></p>"
          + "<a href='/edit/" + title + "'>Create This Page</a></body>"
        );
      }
    }
    var ctime = request.headers['if-modified-since'];
    if (new Date(mtime).getTime() <= new Date(ctime).getTime()) {
      response.writeHead(304, {'Content-Type': 'text/html'});
      response.end();
    } else {
      response.writeHead(200, {'Content-Type': 'text/html', 'Cache-Control': 'must-revalidate', 'Last-Modified': mtime});
      response.end(
        header(title)
        + "<body><div class='page'><article><header><h1>"
        + title
        + "</h1><header>"
        + data
        + "</article><hr />"
        + "<nav><a href='/edit/" + title + "'>Edit</a> | "
        + "<a href='/delete/" + title + "'>Delete</a></nav></div></body></html>");
    }
  },
  edit: function(title, request, response) {
    title = tt(title);
    var data, newPage = false;
    try {
      data = fs.readFileSync(title + ".html", 'UTF-8');
    } catch (e) {
      data = "";
      newPage = true;
    }
    response.writeHead(200, {'Content-Type': 'text/html'});
    response.end(
      header(title)
      + "<body><div class='edit'><form action='/submit/" + title + "' method='post'><h1>"
      + (newPage ? "Creating " : "Editing ")
      + title
      + "</h1><textarea name='text' cols='80' rows='40'>"
      + ent(data)
      + "</textarea><br /><input type='submit' value='Submit' name='Submit' /></form><hr />"
      + "<nav><a href='/page/" + title + "'>&lt; Return</a> | "
      + "<a href='/delete/" + title + "'>Delete</a></nav></div></body></html>");
  },
  submit: function(title, request, response) {
    title = tt(title);
    if (request.method == 'POST') {
      var buf = '';
      request.on('data', function(chunk) {
        buf += chunk.toString();
      });

      request.on('end', function() {
        try {
          var t = qs.parse(buf).text || "";
          var f = fs.openSync(title + ".html", 'w')
          fs.writeSync(f, t, 0);
          fs.closeSync(f);
          redirect(request, response, '/page/' + title);
        } catch (e) {
          errorPage(request, response, e);
        }
      });
    } else {
      redirect(request, response, '/page/' + title);
    }
  },
  delete: function(title, request, response) {
    title = tt(title);
    response.writeHead(200, {'Content-Type': 'text/html'});
    response.end(
      header(title)
      + "<body><div class='delete'>"
      + "<p>Do you really want to delete the page <em>" + title + "</em>?</p>"
      + "<a href='/page/" + title + "'>&lt; No</a> | "
      + "<a href='/deleting/" + title + "'>Yes</a></div></body></html>");
  },
  deleting: function(title, request, response) {
    title = tt(title);
    fs.unlinkSync(title + ".html");
    redirect(request, response, '/page/' + MAINPAGE);
  }
}

http.createServer(function(request, response) {
  var info = url.parse(request.url).pathname.substr(1).split('/');
  console.log(info);
  if (info.length == 1 && info[0] == '') {
    response.writeHead(301, {'Location': '/page/' + MAINPAGE});
    response.end();
    return;
  }
  var name = info[0];
  try {
    if (typeof handlers[name] == 'function') {
      handlers[name](info.slice(1), request, response);
    } else if (info.length == 1) {
      redirect(request, response, '/page/' + name)
    } else {
      response.writeHead(404, {'Content-Type': 'text/plain'});
      response.end("404 Not Found");
    }
  } catch (e) {
    errorPage(request, response, e);
    console.log(e);
  }
}).listen(8124);

## MainPage.html
<p>Hello, world!</p>
	var http = require('http'),
	url = require('url'),
	fs = require('fs'),
	qs = require('querystring');

	const MAINPAGE = 'MainPage';

	function clean(x) {
	return x.replace(/[^a-zA-Z0-9_-]/g, '');
	}

	function ent(x) {
	return x.replace('&', '&').replace('<', '<').replace('"', '"');
	}

	function tt(title) {
	return clean(title[0] \|\| '') \|\| MAINPAGE;
	}

	function errorPage(request, response, e) {
	response.writeHead(500, {'Content-Type': 'text/plain'});
	response.end(e + "");
	}

	function header(title) {
	/* SYNTAX:
	return
	"str"
	=>
	return;
	"str";
	*/
	return ""
	+ "<!DOCTYPE html><html><head><title>"
	+ title
	+ "</title></head>";
	}

	function parsePost(p) {
	pairs = p.split('&');
	var res = { };
	for (var i = 0; i < p.length; i ++) {
	var pair = pairs[i].split('=');
	res[unescape(pair[0])] = unescape(pair[1]);
	}
	return res;
	}

	function redirect(request, response, url, body) {
	response.writeHead(301, {'Content-Type': 'text/html', 'Location': url});
	response.end(body \|\| "");
	}

	var handlers = {
	page: function(title, request, response) {
	title = tt(title);
	var mtime, data;
	l: {
	try {
	mtime = fs.statSync(title + ".html").mtime;
	data = fs.readFileSync(title + ".html", 'UTF-8');
	break l;
	} catch (e) {
	response.writeHead(404, {'Content-Type': 'text/html'});
	response.end(
	header(title)
	+ "<body><div class='nopage'>"
	+ "<p>" + e + "</p>"
	+ "<p><em>This page does not exist. Do you want to create it?</em></p>"
	+ "<a href='/edit/" + title + "'>Create This Page</a></body>"
	);
	}
	}
	var ctime = request.headers['if-modified-since'];
	if (new Date(mtime).getTime() <= new Date(ctime).getTime()) {
	response.writeHead(304, {'Content-Type': 'text/html'});
	response.end();
	} else {
	response.writeHead(200, {'Content-Type': 'text/html', 'Cache-Control': 'must-revalidate', 'Last-Modified': mtime});
	response.end(
	header(title)
	+ "<body><div class='page'><article><header><h1>"
	+ title
	+ "</h1><header>"
	+ data
	+ "</article><hr />"
	+ "<nav><a href='/edit/" + title + "'>Edit</a> \| "
	+ "<a href='/delete/" + title + "'>Delete</a></nav></div></body></html>");
	}
	},
	edit: function(title, request, response) {
	title = tt(title);
	var data, newPage = false;
	try {
	data = fs.readFileSync(title + ".html", 'UTF-8');
	} catch (e) {
	data = "";
	newPage = true;
	}
	response.writeHead(200, {'Content-Type': 'text/html'});
	response.end(
	header(title)
	+ "<body><div class='edit'><form action='/submit/" + title + "' method='post'><h1>"
	+ (newPage ? "Creating " : "Editing ")
	+ title
	+ "</h1><textarea name='text' cols='80' rows='40'>"
	+ ent(data)
	+ "</textarea><br /><input type='submit' value='Submit' name='Submit' /></form><hr />"
	+ "<nav><a href='/page/" + title + "'>< Return</a> \| "
	+ "<a href='/delete/" + title + "'>Delete</a></nav></div></body></html>");
	},
	submit: function(title, request, response) {
	title = tt(title);
	if (request.method == 'POST') {
	var buf = '';
	request.on('data', function(chunk) {
	buf += chunk.toString();
	});

	request.on('end', function() {
	try {
	var t = qs.parse(buf).text \|\| "";
	var f = fs.openSync(title + ".html", 'w')
	fs.writeSync(f, t, 0);
	fs.closeSync(f);
	redirect(request, response, '/page/' + title);
	} catch (e) {
	errorPage(request, response, e);
	}
	});
	} else {
	redirect(request, response, '/page/' + title);
	}
	},
	delete: function(title, request, response) {
	title = tt(title);
	response.writeHead(200, {'Content-Type': 'text/html'});
	response.end(
	header(title)
	+ "<body><div class='delete'>"
	+ "<p>Do you really want to delete the page <em>" + title + "</em>?</p>"
	+ "<a href='/page/" + title + "'>< No</a> \| "
	+ "<a href='/deleting/" + title + "'>Yes</a></div></body></html>");
	},
	deleting: function(title, request, response) {
	title = tt(title);
	fs.unlinkSync(title + ".html");
	redirect(request, response, '/page/' + MAINPAGE);
	}
	}

	http.createServer(function(request, response) {
	var info = url.parse(request.url).pathname.substr(1).split('/');
	console.log(info);
	if (info.length == 1 && info[0] == '') {
	response.writeHead(301, {'Location': '/page/' + MAINPAGE});
	response.end();
	return;
	}
	var name = info[0];
	try {
	if (typeof handlers[name] == 'function') {
	handlers[name](info.slice(1), request, response);
	} else if (info.length == 1) {
	redirect(request, response, '/page/' + name)
	} else {
	response.writeHead(404, {'Content-Type': 'text/plain'});
	response.end("404 Not Found");
	}
	} catch (e) {
	errorPage(request, response, e);
	console.log(e);
	}
	}).listen(8124);