diff --git a/lib/cartodb/api/auth_api.js b/lib/cartodb/api/auth_api.js
index 709667f8..e99d78b6 100644
--- a/lib/cartodb/api/auth_api.js
+++ b/lib/cartodb/api/auth_api.js
@@ -88,7 +88,7 @@ AuthApi.prototype.authorizedByAPIKey = function(user, req, callback) {
  */
 AuthApi.prototype.authorize = function(req, params, callback) {
     var self = this;
-    var user = req.context.user;
+    var user = params.user;
 
     step(
         function () {
diff --git a/lib/cartodb/controllers/analyses.js b/lib/cartodb/controllers/analyses.js
index 22db4014..7b140e8f 100644
--- a/lib/cartodb/controllers/analyses.js
+++ b/lib/cartodb/controllers/analyses.js
@@ -40,7 +40,7 @@ AnalysesController.prototype.sendResponse = function(req, res, resource) {
 
 AnalysesController.prototype.catalog = function (req, res, next) {
     var self = this;
-    var username = req.context.user;
+    var username = res.locals.user;
 
     step(
         function catalogQuery() {
diff --git a/lib/cartodb/controllers/layergroup.js b/lib/cartodb/controllers/layergroup.js
index 3660948b..41a37b31 100644
--- a/lib/cartodb/controllers/layergroup.js
+++ b/lib/cartodb/controllers/layergroup.js
@@ -175,11 +175,11 @@ LayergroupController.prototype.dataview = function(req, res, next) {
     step(
         function retrieveDataview() {
             var mapConfigProvider = new MapStoreMapConfigProvider(
-                self.mapStore, req.context.user, self.userLimitsApi, res.locals
+                self.mapStore, res.locals.user, self.userLimitsApi, res.locals
             );
             self.dataviewBackend.getDataview(
                 mapConfigProvider, 
-                req.context.user, 
+                res.locals.user, 
                 req.params.dataviewName, 
                 res.locals, 
                 this
@@ -204,9 +204,9 @@ LayergroupController.prototype.dataviewSearch = function(req, res, next) {
     step(
         function searchDataview() {
             var mapConfigProvider = new MapStoreMapConfigProvider(
-                self.mapStore, req.context.user, self.userLimitsApi, res.locals
+                self.mapStore, res.locals.user, self.userLimitsApi, res.locals
             );
-            self.dataviewBackend.search(mapConfigProvider, req.context.user, req.params.dataviewName, res.locals, this);
+            self.dataviewBackend.search(mapConfigProvider, res.locals.user, req.params.dataviewName, res.locals, this);
         },
         function finish(err, searchResult, stats) {
             req.profiler.add(stats || {});
@@ -230,7 +230,7 @@ LayergroupController.prototype.attributes = function(req, res, next) {
     step(
         function retrieveFeatureAttributes() {
             var mapConfigProvider = new MapStoreMapConfigProvider(
-                self.mapStore, req.context.user, self.userLimitsApi, res.locals
+                self.mapStore, res.locals.user, self.userLimitsApi, res.locals
             );
             self.attributesBackend.getFeatureAttributes(mapConfigProvider, res.locals, false, this);
         },
@@ -266,7 +266,7 @@ LayergroupController.prototype.tileOrLayer = function (req, res, next) {
     step(
         function mapController$getTileOrGrid() {
             self.tileBackend.getTile(
-                new MapStoreMapConfigProvider(self.mapStore, req.context.user, self.userLimitsApi, res.locals),
+                new MapStoreMapConfigProvider(self.mapStore, res.locals.user, self.userLimitsApi, res.locals),
                 req.params, this
             );
         },
@@ -362,11 +362,11 @@ LayergroupController.prototype.staticMap = function(req, res, width, height, zoo
         function getImage() {
             if (center) {
                 self.previewBackend.getImage(
-                    new MapStoreMapConfigProvider(self.mapStore, req.context.user, self.userLimitsApi, res.locals),
+                    new MapStoreMapConfigProvider(self.mapStore, res.locals.user, self.userLimitsApi, res.locals),
                     format, width, height, zoom, center, this);
             } else {
                 self.previewBackend.getImage(
-                    new MapStoreMapConfigProvider(self.mapStore, req.context.user, self.userLimitsApi, res.locals),
+                    new MapStoreMapConfigProvider(self.mapStore, res.locals.user, self.userLimitsApi, res.locals),
                     format, width, height, zoom /* bounds */, this);
             }
         },
@@ -405,7 +405,7 @@ LayergroupController.prototype.sendResponse = function(req, res, body, status, h
     var dbName = res.locals.dbname;
     step(
         function getAffectedTables() {
-            self.getAffectedTables(req.context.user, dbName, res.locals.token, this);
+            self.getAffectedTables(res.locals.user, dbName, res.locals.token, this);
         },
         function sendResponse(err, affectedTables) {
             req.profiler.done('affectedTables');
diff --git a/lib/cartodb/controllers/map.js b/lib/cartodb/controllers/map.js
index 044a2b79..f2e86d13 100644
--- a/lib/cartodb/controllers/map.js
+++ b/lib/cartodb/controllers/map.js
@@ -161,7 +161,7 @@ MapController.prototype.create = function(req, res, prepareConfigFn, next) {
         function prepareAdapterMapConfig(err, requestMapConfig) {
             assert.ifError(err);
             context.analysisConfiguration = {
-                user: req.context.user,
+                user: res.locals.user,
                 db: {
                     host: res.locals.dbhost,
                     port: res.locals.dbport,
@@ -170,11 +170,11 @@ MapController.prototype.create = function(req, res, prepareConfigFn, next) {
                     pass: res.locals.dbpassword
                 },
                 batch: {
-                    username: req.context.user,
+                    username: res.locals.user,
                     apiKey: res.locals.api_key
                 }
             };
-            self.mapConfigAdapter.getMapConfig(req.context.user, requestMapConfig, res.locals, context, this);
+            self.mapConfigAdapter.getMapConfig(res.locals.user, requestMapConfig, res.locals, context, this);
         },
         function createLayergroup(err, requestMapConfig) {
             assert.ifError(err);
@@ -183,7 +183,7 @@ MapController.prototype.create = function(req, res, prepareConfigFn, next) {
             self.mapBackend.createLayergroup(
                 mapConfig, 
                 res.locals,
-                new CreateLayergroupMapConfigProvider(mapConfig, req.context.user, self.userLimitsApi, res.locals),
+                new CreateLayergroupMapConfigProvider(mapConfig, res.locals.user, self.userLimitsApi, res.locals),
                 this
             );
         },
@@ -215,8 +215,8 @@ MapController.prototype.create = function(req, res, prepareConfigFn, next) {
                 next(err);
             } else {
                 var analysesResults = context.analysesResults || [];
-                self.addDataviewsAndWidgetsUrls(req.context.user, layergroup, mapConfig.obj());
-                self.addAnalysesMetadata(req.context.user, layergroup, analysesResults, true);
+                self.addDataviewsAndWidgetsUrls(res.locals.user, layergroup, mapConfig.obj());
+                self.addAnalysesMetadata(res.locals.user, layergroup, analysesResults, true);
                 addContextMetadata(layergroup, mapConfig.obj(), context);
                 res.set('X-Layergroup-Id', layergroup.layergroupid);
                 self.send(req, res, layergroup, 200);
@@ -239,7 +239,7 @@ function addContextMetadata(layergroup, mapConfig, context) {
 MapController.prototype.instantiateTemplate = function(req, res, prepareParamsFn, next) {
     var self = this;
 
-    var cdbuser = req.context.user;
+    var cdbuser = res.locals.user;
 
     var mapConfigProvider;
     var mapConfig;
@@ -304,7 +304,7 @@ MapController.prototype.afterLayergroupCreate =
 function(req, res, mapconfig, layergroup, analysesResults, callback) {
     var self = this;
 
-    var username = req.context.user;
+    var username = res.locals.user;
 
     var tasksleft = 2; // redis key and affectedTables
     var errors = [];
diff --git a/lib/cartodb/controllers/named_maps.js b/lib/cartodb/controllers/named_maps.js
index 5748cba7..759ae4b6 100644
--- a/lib/cartodb/controllers/named_maps.js
+++ b/lib/cartodb/controllers/named_maps.js
@@ -47,7 +47,7 @@ NamedMapsController.prototype.register = function(app) {
 };
 
 NamedMapsController.prototype.sendResponse = function(req, res, resource, headers, namedMapProvider) {
-    this.surrogateKeysCache.tag(res, new NamedMapsCacheEntry(req.context.user, namedMapProvider.getTemplateName()));
+    this.surrogateKeysCache.tag(res, new NamedMapsCacheEntry(res.locals.user, namedMapProvider.getTemplateName()));
     res.set('Content-Type', headers['content-type'] || headers['Content-Type'] || 'image/png');
     res.set('Cache-Control', 'public,max-age=7200,must-revalidate');
 
@@ -87,7 +87,7 @@ NamedMapsController.prototype.sendResponse = function(req, res, resource, header
 NamedMapsController.prototype.tile = function(req, res, next) {
     var self = this;
 
-    var cdbUser = req.context.user;
+    var cdbUser = res.locals.user;
 
     var namedMapProvider;
     step(
@@ -121,7 +121,7 @@ NamedMapsController.prototype.tile = function(req, res, next) {
 NamedMapsController.prototype.staticMap = function(req, res, next) {
     var self = this;
 
-    var cdbUser = req.context.user;
+    var cdbUser = res.locals.user;
 
     var format = req.params.format === 'jpg' ? 'jpeg' : 'png';
     res.locals.format = req.params.format || 'png';
diff --git a/lib/cartodb/controllers/named_maps_admin.js b/lib/cartodb/controllers/named_maps_admin.js
index a4a126d5..f9e68184 100644
--- a/lib/cartodb/controllers/named_maps_admin.js
+++ b/lib/cartodb/controllers/named_maps_admin.js
@@ -44,7 +44,7 @@ NamedMapsAdminController.prototype.register = function (router) {
 NamedMapsAdminController.prototype.create = function(req, res, next) {
     var self = this;
 
-    var cdbuser = req.context.user;
+    var cdbuser = res.locals.user;
 
     step(
         function checkPerms(){
@@ -68,7 +68,7 @@ NamedMapsAdminController.prototype.create = function(req, res, next) {
 NamedMapsAdminController.prototype.update = function(req, res, next) {
     var self = this;
 
-    var cdbuser = req.context.user;
+    var cdbuser = res.locals.user;
     var template;
     var tpl_id;
 
@@ -99,7 +99,7 @@ NamedMapsAdminController.prototype.retrieve = function(req, res, next) {
 
     req.profiler.start('windshaft-cartodb.get_template');
 
-    var cdbuser = req.context.user;
+    var cdbuser = res.locals.user;
     var tpl_id;
     step(
         function checkPerms(){
@@ -133,7 +133,7 @@ NamedMapsAdminController.prototype.destroy = function(req, res, next) {
 
     req.profiler.start('windshaft-cartodb.delete_template');
 
-    var cdbuser = req.context.user;
+    var cdbuser = res.locals.user;
     var tpl_id;
     step(
         function checkPerms(){
@@ -158,7 +158,7 @@ NamedMapsAdminController.prototype.list = function(req, res, next) {
     var self = this;
     req.profiler.start('windshaft-cartodb.get_template_list');
 
-    var cdbuser = req.context.user;
+    var cdbuser = res.locals.user;
 
     step(
         function checkPerms(){
diff --git a/lib/cartodb/middleware/allow-query-params.js b/lib/cartodb/middleware/allow-query-params.js
index 04a27033..7ec31d74 100644
--- a/lib/cartodb/middleware/allow-query-params.js
+++ b/lib/cartodb/middleware/allow-query-params.js
@@ -3,7 +3,7 @@ module.exports = function allowQueryParams(params) {
         throw new Error('allowQueryParams must receive an Array of params');
     }
     return function allowQueryParamsMiddleware(req, res, next) {
-        req.context.allowedQueryParams = params;
+        res.locals.allowedQueryParams = params;
         next();
     };
 };
diff --git a/lib/cartodb/middleware/context/clean-up-query-params.js b/lib/cartodb/middleware/context/clean-up-query-params.js
index 4cc1ceb6..280fe986 100644
--- a/lib/cartodb/middleware/context/clean-up-query-params.js
+++ b/lib/cartodb/middleware/context/clean-up-query-params.js
@@ -18,15 +18,15 @@ module.exports = function cleanUpQueryParamsMiddleware () {
     return function cleanUpQueryParams (req, res, next) {
         var allowedQueryParams = REQUEST_QUERY_PARAMS_WHITELIST;
 
-        if (Array.isArray(req.context.allowedQueryParams)) {
-            allowedQueryParams = allowedQueryParams.concat(req.context.allowedQueryParams);
+        if (Array.isArray(res.locals.allowedQueryParams)) {
+            allowedQueryParams = allowedQueryParams.concat(res.locals.allowedQueryParams);
         }
 
         req.query = _.pick(req.query, allowedQueryParams);
 
         // bring all query values onto res.locals object
         _.extend(res.locals, req.query);
-
+        
         next();
     };
 };
diff --git a/lib/cartodb/middleware/context/db-conn-setup.js b/lib/cartodb/middleware/context/db-conn-setup.js
index 634711f7..a39466fe 100644
--- a/lib/cartodb/middleware/context/db-conn-setup.js
+++ b/lib/cartodb/middleware/context/db-conn-setup.js
@@ -2,7 +2,7 @@ const _ = require('underscore');
 
 module.exports = function dbConnSetupMiddleware(pgConnection) {
     return function (req, res, next) {
-        const user = req.context.user;
+        const user = res.locals.user;
 
         pgConnection.setDBConn(user, res.locals, (err) => {
             if (err) {
diff --git a/lib/cartodb/middleware/context/layergroup-token.js b/lib/cartodb/middleware/context/layergroup-token.js
index b90d5e13..63524942 100644
--- a/lib/cartodb/middleware/context/layergroup-token.js
+++ b/lib/cartodb/middleware/context/layergroup-token.js
@@ -5,7 +5,7 @@ module.exports = function layergroupTokenMiddleware(req, res, next) {
         return next();
     }
 
-    var user = req.context.user;
+    var user = res.locals.user;
 
     var layergroupToken = LayergroupToken.parse(res.locals.token);
     res.locals.token = layergroupToken.token;
diff --git a/lib/cartodb/middleware/context/locals.js b/lib/cartodb/middleware/context/locals.js
index ce34f442..bb7d5ee2 100644
--- a/lib/cartodb/middleware/context/locals.js
+++ b/lib/cartodb/middleware/context/locals.js
@@ -1,9 +1,8 @@
 const _ = require('underscore');
 
 module.exports = function localsMiddleware(req, res, next) {
-    res.locals = {};
     _.extend(res.locals, req.params);
-
+    
     next();
 };
 
diff --git a/lib/cartodb/middleware/user.js b/lib/cartodb/middleware/user.js
index 40934849..ce3fdd29 100644
--- a/lib/cartodb/middleware/user.js
+++ b/lib/cartodb/middleware/user.js
@@ -2,6 +2,13 @@ var CdbRequest = require('../models/cdb_request');
 var cdbRequest = new CdbRequest();
 
 module.exports = function userMiddleware(req, res, next) {
-    req.context.user = cdbRequest.userByReq(req);
+    res.locals.user = cdbRequest.userByReq(req);
+
+    // avoid a req.params.user equals to undefined
+    // overwrites res.locals.user
+    if(!req.params.user) {
+        delete req.params.user;
+    }
+
     next();
 };
diff --git a/lib/cartodb/server.js b/lib/cartodb/server.js
index 51841dca..44be69a1 100644
--- a/lib/cartodb/server.js
+++ b/lib/cartodb/server.js
@@ -369,7 +369,8 @@ function bootstrap(opts) {
     app.use(bodyParser.json());
 
     app.use(function bootstrap$prepareRequestResponse(req, res, next) {
-        req.context = req.context || {};
+        res.locals = {};
+        
         req.profiler = new Profiler({
             statsd_client: global.statsClient,
             profile: opts.useProfiler
diff --git a/test/acceptance/ported/support/ported_server_options.js b/test/acceptance/ported/support/ported_server_options.js
index 25a25fc7..8604e68c 100644
--- a/test/acceptance/ported/support/ported_server_options.js
+++ b/test/acceptance/ported/support/ported_server_options.js
@@ -63,7 +63,7 @@ module.exports = _.extend({}, serverOptions, {
 
         _.extend(req.params, req.query);
         req.params.user = 'localhost';
-        req.context = {user: 'localhost'};
+        res.locals.user = 'localhost';
 
         req.params.dbhost = global.environment.postgres.host;
         req.params.dbport = req.params.dbport || global.environment.postgres.port;
diff --git a/test/unit/cartodb/prepare-context.test.js b/test/unit/cartodb/prepare-context.test.js
index d4e36378..0cbc6b85 100644
--- a/test/unit/cartodb/prepare-context.test.js
+++ b/test/unit/cartodb/prepare-context.test.js
@@ -48,8 +48,11 @@ describe('prepare-context', function() {
         req.profiler = {
             done: function() {}
         };
-        req.context = { user: 'localhost' };
-        res.locals = {};
+
+        if(!res.locals) {
+            res.locals = {};
+        }
+        res.locals.user = 'localhost';
 
         return {req, res};
     }
@@ -128,8 +131,10 @@ describe('prepare-context', function() {
                     }
                 };
 
+                res = {};
+
                 ({req, res} = prepareRequest(req, res));
-                
+
                 dbConnSetup(req, res, function(err) {
                     if ( err ) { done(err); return; }
                     // wrong key resets params to no user