/
arvorezinha.js
191 lines (115 loc) · 3.35 KB
/
arvorezinha.js
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/* Usage / Conf */
var usage = "Provides Trees\n\
Usage\n\
\n\
GET /tree\n\
Returns to the caller a random height tree\n\
\n\
GET /tree/height\n\
Returns to the caller a tree of the specified height (restrictions apply)\n\
\n\
RFC and docs somewhere at http://blol.org\n";
var maxHeight = 120;
/* String Helpers */
String.prototype.isInt = function() {
return !isNaN(this) && (function(x) { return (x | 0) === x; })(parseFloat(this))
}
/* LittleTree: Generates Little Trees */
var LittleTree = function(height) {
var low = 1;
this.height = height || parseInt(Math.random() * (maxHeight - low) + low);
}
LittleTree.prototype.makeTree = function() {
var result = "";
for (var i = 1; i <= this.height; i++) {
for (var j = 0; j < this.height - i; j++) {
result += " ";
}
for (var j = 1; j <= 2*i - 1; j++) {
result += "*";
}
result += "\n";
}
return result;
}
LittleTree.prototype.makeTrunk = function() {
var result = "";
var lastLineWidth = this.height * 2 - 1;
if (this.height % 2 > 0) {
for (var i = 0; i <= (this.height / 2); i++) {
for (var j = 0; j <= lastLineWidth / 4 - 1; j++) {
result += " ";
}
for (var j = 0; j <= lastLineWidth / 2; j++) {
result += "#";
}
result += "\n";
}
} else {
for (var i = 0; i <= (this.height / 2); i++) {
for (var j = 0; j <= lastLineWidth / 4; j++) {
result += " ";
}
for (var j = 0; j <= lastLineWidth / 2 - 1; j++) {
result += "x";
}
result += "\n";
}
}
return result;
}
LittleTree.prototype.toString = function() {
return this.makeTree() + this.makeTrunk();
}
/* Webscale HTTP Server */
var express = require('express')
var app = express()
/* Log connections to console */
function log(req) {
var ip = req.header('x-forwarded-for') || req.connection.remoteAddress;
console.log(req.method + " " + ip + " - " + req.url);
}
/* * Routes * */
app.get('/tree', function(req, res) {
log(req);
res.set('Content-Type', 'text/plain');
res.send(String(new LittleTree()));
});
app.get('/tree/:height', function(req, res) {
log(req);
res.set('Content-Type', 'text/plain');
if (req.params.height.isInt()) {
if (req.params.height <= maxHeight && req.params.height >= 0) {
res.send(String(new LittleTree(req.params.height)));
} else {
res.send(usage);
}
} else {
res.send(usage);
}
});
app.get('*', function(req, res) {
log(req);
res.set('Content-Type', 'text/plain');
res.send(usage);
});
app.post('*', function(req, res) {
log(req);
res.set('Content-Type', 'text/plain');
res.send(usage);
});
app.put('*', function(req, res) {
log(req);
res.set('Content-Type', 'text/plain');
res.send(usage);
});
app.delete('*', function(req, res) {
log(req);
res.set('Content-Type', 'text/plain');
res.send(usage);
});
var server = app.listen(3000, "::", function () {
var host = server.address().address
var port = server.address().port
console.log('RESTful server listening at http://%s:%s', host, port)
});