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'use strict';
var http = require('http');
var port = parseInt(process.env.PORT || 8000);
var fixed = makeString(20 * 1024, 'C'),
storedBytes = {},
storedBuffer = {},
storedUnicode = {};
var useDomains = process.env.NODE_USE_DOMAINS;
// set up one global domain.
if (useDomains) {
var domain = require('domain');
var gdom = domain.create();
gdom.on('error', function(er) {
console.error('Error on global domain', er);
throw er;
});
gdom.enter();
}
var server = module.exports = http.createServer(function(req, res) {
if (useDomains) {
var dom = domain.create();
dom.add(req);
dom.add(res);
}
var commands = req.url.split('/');
var command = commands[1];
var body = '';
var arg = commands[2];
var n_chunks = parseInt(commands[3], 10);
var status = 200;
var n, i;
if (command == 'bytes') {
n = ~~arg;
if (n <= 0)
throw new Error('bytes called with n <= 0');
if (storedBytes[n] === undefined) {
storedBytes[n] = makeString(n, 'C');
}
body = storedBytes[n];
} else if (command == 'buffer') {
n = ~~arg;
if (n <= 0)
throw new Error('buffer called with n <= 0');
if (storedBuffer[n] === undefined) {
storedBuffer[n] = new Buffer(n);
for (i = 0; i < n; i++) {
storedBuffer[n][i] = 'C'.charCodeAt(0);
}
}
body = storedBuffer[n];
} else if (command == 'unicode') {
n = ~~arg;
if (n <= 0)
throw new Error('unicode called with n <= 0');
if (storedUnicode[n] === undefined) {
storedUnicode[n] = makeString(n, '\u263A');
}
body = storedUnicode[n];
} else if (command == 'quit') {
res.connection.server.close();
body = 'quitting';
} else if (command == 'fixed') {
body = fixed;
} else if (command == 'echo') {
res.writeHead(200, { 'Content-Type': 'text/plain',
'Transfer-Encoding': 'chunked' });
req.pipe(res);
return;
} else {
status = 404;
body = 'not found\n';
}
// example: http://localhost:port/bytes/512/4
// sends a 512 byte body in 4 chunks of 128 bytes
if (n_chunks > 0) {
res.writeHead(status, { 'Content-Type': 'text/plain',
'Transfer-Encoding': 'chunked' });
// send body in chunks
var len = body.length;
var step = Math.floor(len / n_chunks) || 1;
for (i = 0, n = (n_chunks - 1); i < n; ++i) {
res.write(body.slice(i * step, i * step + step));
}
res.end(body.slice((n_chunks - 1) * step));
} else {
var content_length = body.length.toString();
res.writeHead(status, { 'Content-Type': 'text/plain',
'Content-Length': content_length });
res.end(body);
}
});
function makeString(size, c) {
var s = '';
while (s.length < size) {
s += c;
}
return s;
}
server.listen(port, function() {
if (module === require.main)
console.error('Listening at http://127.0.0.1:' + port + '/');
});
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