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'use strict';
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var serverUrl = require('./url');
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var http = require('http');
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var url = require('url');
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const handleScroll = (req, res) => {
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res.writeHead(200, {'Content-Type': 'text/html'});
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res.end('<!DOCTYPEhtml><html lang="en"><body style="width:10000px; height:10000px"></body></html">');
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};
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const handleAPagenation = (req, res) => {
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let u = url.parse(req.url);
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let params = new url.URLSearchParams(u.search);
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let page = params.get('page') === null ? null : Number(params.get('page'));
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if (page === null || isNaN(page)) {
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return handle404(req, res);
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}
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let body = '';
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let nextLink = u.pathname + '?page=' + (page + 1);
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let prevLink = u.pathname + '?page=' + (page - 1);
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if (page > 1) {
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body += '<a href="' + prevLink + '">prev</a> | ';
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}
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body += '<a href="' + nextLink + '">next</a>';
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res.writeHead(200, {'Content-Type': 'text/html'});
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res.end('<!DOCTYPEhtml><html lang="en"><body">' + body + '</body></html">');
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};
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const handleLinkPagenation = (req, res) => {
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let u = url.parse(req.url);
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let params = new url.URLSearchParams(u.search);
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let page = params.get('page') === null ? null : Number(params.get('page'));
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if (page === null || isNaN(page)) {
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return handle404(req, res);
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}
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let head = '';
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let nextLink = u.pathname + '?page=' + (page + 1);
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let prevLink = u.pathname + '?page=' + (page - 1);
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if (page > 1) {
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head += '<link rel="prev" href="' + prevLink + '"></link>';
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}
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head += '<link rel="next" href="' + nextLink + '"></link>';
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res.writeHead(200, {'Content-Type': 'text/html'});
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res.end('<!DOCTYPEhtml><html lang="en"><head>' + head + '</head><body"></body></html">');
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};
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const handleFollow = (req, res) => {
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let body = '';
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body += '<a href="#a">a</a>';
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body += '<a href="#external" target="_blank">external</a>';
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body += '<img width="320" height="240" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" usemap="#map"><map name="map"><area href="#area" shape="rect" coords="15,19,126,104"></map>'
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res.writeHead(200, {'Content-Type': 'text/html'});
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res.end('<!DOCTYPEhtml><html lang="en"><body">' + body + '</body></html">');
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}
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const handle404 = (req, res) => {
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res.writeHead(404, {'Content-Type': 'text/plain'});
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res.end('not found')
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};
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http.createServer(function (req, res) {
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if (req.method !== 'GET') {
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handle404(req, res);
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}
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let u = url.parse(req.url);
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if (u.pathname === '/scroll') {
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handleScroll(req, res);
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} else if (u.pathname === '/a-pagenation') {
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handleAPagenation(req, res);
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} else if (u.pathname === '/link-pagenation') {
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handleLinkPagenation(req, res);
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} else if (u.pathname === '/follow') {
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handleFollow(req, res);
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} else {
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handle404(req, res);
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}
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console.log(`"${req.method} ${req.url}"`, res.statusCode)
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}).listen(serverUrl.PORT, serverUrl.HOST);
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