Backport benchmark changes to master branch

test/benchmark.js

@@ -1,13 +1,30 @@
+#!/usr/bin/env node
+
 // small benchmark to execute with nodejs
 
 var http = require('http')
 
+if ( process.argv.length < 3 ) {
+  console.error("Usage: " + process.argv[1] + " <baseurl> [<map_key>]");
+  process.exit(1);
+}
+
+var baseurl = process.argv[2];
+console.log("Baseurl is " + baseurl);
+var baseurl_comps = baseurl.match(/(https?:\/\/)?([^:\/]*)(:([^\/]*))?(\/.*).*/);
+
 var options = {
-  host: 'vizzuality.localhost.lan',
-  port: 80,
-  path: '/tiles/datos_agroguia_2/{z}/{x}/{y}.png?cache_buster=0&map_key=a9edf3d0d2edbcf55ad38ee5b23af1507b774a5b'
+  host: baseurl_comps[2],
+  port: baseurl_comps[4] ? baseurl_comps[4] : 8181,
+  path: baseurl_comps[5] + '/{z}/{x}/{y}.png?cache_buster=0'
 };
 
+if ( process.argv.length > 3 ) {
+  options.path += '&map_key=' + process.argv[3]; 
+}
+
+console.dir(options);
+
 function randInt(min, max) {
     return min + Math.floor(Math.random()*(max- min +1));
 }
@@ -25,6 +42,18 @@ function end() {
 var N = 1000
 var ok = 0;
 var error = 0;
+
+function fail(msg) {
+  console.log(msg);
+  ++ error;
+  if ( error + ok === N ) end();
+}
+
+function pass() {
+  ++ ok;
+  if ( error + ok === N ) end();
+}
+
 for(var i = 0; i < N; ++i) {
     var opt = {
         host: options.host,
@@ -32,17 +61,21 @@ for(var i = 0; i < N; ++i) {
         path: new String(options.path)
     };
     opt.path = opt.path.replace('{z}', 2).replace('{x}', randInt(0, 3)).replace('{y}', randInt(0, 3));
-    console.log(opt.path)
+    //console.log(opt.path)
     http.get(opt, function(res) {
-        //console.log(ok + error);
-        ok++;
-        if(ok + error  === N) 
-            end();
+      res.body = '';
+      res.on('data', function(chunk) {
+        // Save only first chunk, to reduce cost of the operation
+        if ( res.body.length == 0 ) res.body += chunk;
+      });
+      res.on('end', function() {
+        if ( res.statusCode == 200 ) pass();
+        else {
+          fail(res.statusCode + ' http://' + opt.host + ':' + opt.port + opt.path + ' ' + res.body);
+        }
+      });
     }).on('error', function(e) {
-        //console.log(ok + error);
-        error ++;
-        if(ok + error  === N) 
-            end();
+        fail('unknown (http) error');
     });
 }