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test/websocket_test/app.js

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+'use strict';
+
+// this is a test to understand accessing sql api via websockets
+var express = require('express')
+  , app     = express.createServer(
+    express.logger({
+        buffer: true,
+        format: '[:date] :req[X-Real-IP] \033[90m:method\033[0m \033[36m:req[Host]:url\033[0m \033[90m:status :response-time ms -> :res[Content-Type]\033[0m'
+    }))
+    , Step     = require('step')
+    , _        = require('underscore');
+
+app.use(express.bodyParser());
+app.use(express.static(__dirname + '/public'));
+app.enable('jsonp callback');
+
+var io = require('socket.io');
+io = io.listen(app);
+
+io.configure('development', function(){
+    io.set('log level', 1);
+    io.set('origins', '*:*');
+});
+
+app.listen(8080);
+
+// hacked postgres setup
+//var pg = require('pg');
+var pg = require('pg').native //native libpq bindings = `
+var conString = "tcp://postgres@localhost/cartodb_dev_user_2_db";
+
+var client = new pg.Client(conString);
+client.connect();
+
+
+io.sockets.on('connection', function (socket) {
+  socket.emit('news', { hello: 'world' });
+  socket.on('my other event', function (data) {
+    console.log(data);
+  });
+
+  socket.on('sql_query', function(data){
+
+      var query = client.query(data.sql);
+      var id = data.id;
+
+      query.on('row', function(row) {
+          socket.emit("sql_result", {r:row, id:id, state:1})
+      });
+
+      query.on('end',function(){
+          socket.emit("sql_result", {id:id, state:0});
+      });
+
+      query.on('error', function(row){
+          socket.emit("sql_result", {r:row, id:id, state:-1})
+      });
+  });
+});