Merge pull request #81 from microservices-demo/fix-metrics-accounting

Improve metrics accounting

api/metrics/index.js

@@ -18,25 +18,12 @@
     return (diff[0] * 1e9 + diff[1]) / 1000000000;
   }
 
-  function parse(path) {
-    var clean_path = path;
-
-    if (path[path.length - 1] != '/') {
-      if (!path.includes('.')) {
-        clean_path = path.substr(0, path.lastIndexOf('/') + 1);
-      }
-    };
-
-    return clean_path;
-}
-
   function observe(method, path, statusCode, start) {
     var path = path.toLowerCase();
     if (path !== '/metrics' && path !== '/metrics/') {
         var duration = s(start);
         var method = method.toLowerCase();
-        var clean_path = parse(path);
-        metric.http.requests.duration.labels(method, clean_path, statusCode).observe(duration);
+        metric.http.requests.duration.labels(method, path, statusCode).observe(duration);
     }
   };
 

helpers/index.js

@@ -51,6 +51,14 @@
     res.end();
   }
 
+  /* Rewrites and redirects any url that doesn't end with a slash. */
+  helpers.rewriteSlash = function(req, res, next) {
+   if(req.url.substr(-1) == '/' && req.url.length > 1)
+       res.redirect(301, req.url.slice(0, -1));
+   else
+       next();
+  }
+
   /* Public: performs an HTTP GET request to the given URL
    *
    * url  - the URL where the external service can be reached out

server.js

@@ -15,8 +15,10 @@ var request      = require("request")
   , metrics      = require("./api/metrics")
   , app          = express()
 
-app.use(express.static("public"));
+
+app.use(helpers.rewriteSlash);
 app.use(metrics);
+app.use(express.static("public"));
 if(process.env.SESSION_REDIS) {
     console.log('Using the redis based session manager');
     app.use(session(config.session_redis));