148 koa usage fix (#4)

* Fix middleware && add bodyparser

* req, res -> ctx

server/src/index.ts

@@ -1,5 +1,6 @@
 import * as Koa from 'koa';
 import * as Router from 'koa-router';
+import * as bodyParser from 'koa-bodyparser';
 
 
 import { router as anomaliesRouter } from './routes/anomalies';
@@ -13,10 +14,13 @@ checkDataFolders();
 var app = new Koa();
 const PORT = process.env.HASTIC_PORT || 8000;
 
-app.use(async function(ctx) {
+app.use(bodyParser())
+
+app.use(async function(ctx, next) {
   ctx.set('Access-Control-Allow-Origin', '*');
   ctx.set('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, PATCH, OPTIONS');
   ctx.set('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
+  next();
 });
 
 var rootRouter = new Router();
@@ -24,7 +28,7 @@ rootRouter.use('/anomalies', anomaliesRouter.routes(), anomaliesRouter.allowedMe
 rootRouter.use('/segments', segmentsRouter.routes(), segmentsRouter.allowedMethods());
 rootRouter.use('/alerts', alertsRouter.routes(), alertsRouter.allowedMethods());
 rootRouter.get('/', async (ctx) => {
-  ctx.body = { status: 'OK' };
+  ctx.response.body = { status: 'OK' };
 });
 
 app

server/src/routes/alerts.ts

@@ -6,7 +6,7 @@ import * as Router from 'koa-router';
 
 function getAlert(ctx: Router.IRouterContext) {
   
-  let anomalyId: AnomalyId = ctx.request.body.query.anomaly_id;
+  let anomalyId: AnomalyId = ctx.request.query.anomaly_id;
   let anomaly = loadAnomalyById(anomalyId)
   if(anomaly == null) {
     anomalyId = getAnomalyIdByName(anomalyId.toLowerCase());
@@ -23,7 +23,7 @@ function getAlert(ctx: Router.IRouterContext) {
 function changeAlert(ctx: Router.IRouterContext) {
 
   let anomalyId: AnomalyId = ctx.request.body.anomaly_id;
-    let enable: boolean = ctx.body.enable;
+  let enable: boolean = ctx.request.body.enable;
 
   let anomaly = loadAnomalyById(anomalyId)
   if(anomaly == null) {
@@ -39,7 +39,8 @@ function changeAlert(ctx: Router.IRouterContext) {
     alertsAnomalies.splice(pos, 1);
     saveAlertsAnomalies(alertsAnomalies);
   }
-    ctx.response.body = { status: 'Ok' };
+  ctx.response.body = { status: 'OK' };
+
 }
 
 export const router = new Router();

server/src/routes/anomalies.ts

@@ -10,9 +10,9 @@ import {
 import { runLearning } from '../services/analytics'
 import { saveTargets } from '../services/metrics';
 
-async function sendAnomalyTypeStatus(req, res) {
-  let id = req.query.id;
-  let name = req.query.name;
+async function sendAnomalyTypeStatus(ctx: Router.IRouterContext) {
+  let id = ctx.request.query.id;
+  let name = ctx.request.query.name;
   try {
     let anomaly: Anomaly;
     if(id !== undefined) {
@@ -21,28 +21,26 @@ async function sendAnomalyTypeStatus(req, res) {
       anomaly = loadAnomalyByName(name);
     }
     if(anomaly === null) {
-      res.status(404).send({
-        code: 404,
-        message: 'Not found'
-      });
+      ctx.response.status = 404;
       return;
     }
     if(anomaly.status === undefined) {
       throw new Error('No status for ' + name);
     }
-    res.status(200).send({ status: anomaly.status, errorMessage: anomaly.error });
+    ctx.response.body = { status: anomaly.status, errorMessage: anomaly.error };
   } catch(e) {
     console.error(e);
     // TODO: better send 404 when we know than isn`t found
-    res.status(500).send({ error: 'Can`t return anything' });
+    ctx.response.status = 500;
+    ctx.response.body = { error: 'Can`t return anything' };
   }
 
 }
 
-async function getAnomaly(req, res) {
+async function getAnomaly(ctx: Router.IRouterContext) {
   try {
-    let id = req.query.id;
-    let name = req.query.name;
+    let id = ctx.request.query.id;
+    let name = ctx.request.query.name;
 
     let anomaly:Anomaly;
     if(id !== undefined) {
@@ -51,66 +49,65 @@ async function getAnomaly(req, res) {
       anomaly = loadAnomalyByName(name.toLowerCase());
     }
     if(anomaly === null) {
-      res.status(404).send({
-        code: 404,
-        message: 'Not found'
-      });
+      ctx.response.status = 404;
       return;
     }
 
-    let payload = JSON.stringify({
+    ctx.response.body = {
       name: anomaly.name,
       metric: anomaly.metric,
       status: anomaly.status
-    });
-    res.status(200).send(payload)
+    };
   } catch(e) {
     console.error(e);
     // TODO: better send 404 when we know than isn`t found
-    res.status(500).send('Can`t get anything');
+    ctx.response.status = 500;
+    ctx.response.body = 'Can`t get anything';
   }
 }
 
-async function createAnomaly(req, res) {
+async function createAnomaly(ctx: Router.IRouterContext) {
   try {
+    let body = ctx.request.body;
     const metric:Metric = {
-      datasource: req.body.metric.datasource,
-      targets: saveTargets(req.body.metric.targets)
+      datasource: body.metric.datasource,
+      targets: saveTargets(body.metric.targets)
     };
 
     const anomaly:Anomaly = {
-      name: req.body.name,
-      panelUrl: req.body.panelUrl,
+      name: body.name,
+      panelUrl: body.panelUrl,
       metric: metric,
-      datasource: req.body.datasource,
+      datasource: body.datasource,
       status: 'learning',
       last_prediction_time: 0,
       next_id: 0
     };
     let anomalyId = insertAnomaly(anomaly);
     if(anomalyId === null) {
-      res.status(403).send({
+      ctx.response.status = 403;
+      ctx.response.body = {
         code: 403,
         message: 'Already exists'
-      });
+      };
     }
 
-    let payload = JSON.stringify({ anomaly_id: anomalyId })
-    res.status(200).send(payload);
+    ctx.response.body = { anomaly_id: anomalyId };
 
     runLearning(anomalyId);
   } catch(e) {
-    res.status(500).send({
+    ctx.response.status = 500;
+    ctx.response.body = {
       code: 500,
       message: 'Internal error'
-    });
+    };
   }
 }
 
-function deleteAnomaly(req, res) {
+function deleteAnomaly(ctx: Router.IRouterContext) {
   try {
-    let id = req.query.id;
-    let name = req.query.name;
+    let id = ctx.request.query.id;
+    let name = ctx.request.query.name;
 
     if(id !== undefined) {
       removeAnomaly(id);
@@ -118,15 +115,16 @@ function deleteAnomaly(req, res) {
       removeAnomaly(name.toLowerCase());
     }
     
-    res.status(200).send({
+    ctx.response.body = {
       code: 200,
       message: 'Success'
-    });
+    };
   } catch(e) {
-    res.status(500).send({
+    ctx.response.status = 500;
+    ctx.response.body = {
       code: 500,
       message: 'Internal error'
-    });
+    };
   }
 }
 

server/src/routes/segments.ts

@@ -15,15 +15,15 @@ import { runLearning } from '../services/analytics';
 
 async function sendSegments(ctx: Router.IRouterContext) {
 
-  let anomalyId: AnomalyId = ctx.query.anomaly_id;
+  let anomalyId: AnomalyId = ctx.request.query.anomaly_id;
   let anomaly:Anomaly = loadAnomalyById(anomalyId);
   if(anomaly === null) {
     anomalyId = getAnomalyIdByName(anomalyId);
   }
 
-  let lastSegmentId = ctx.query.last_segment;
-  let timeFrom = ctx.query.from;
-  let timeTo = ctx.query.to;
+  let lastSegmentId = ctx.request.query.last_segment;
+  let timeFrom = ctx.request.query.from;
+  let timeTo = ctx.request.query.to;
 
   let segments = getLabeledSegments(anomalyId);
 
@@ -45,9 +45,9 @@ async function sendSegments(ctx: Router.IRouterContext) {
 
 }
 
-async function updateSegments(req, res) {
+async function updateSegments(ctx: Router.IRouterContext) {
   try {
-    let segmentsUpdate = req.body;
+    let segmentsUpdate = ctx.request.body;
 
     let anomalyId = segmentsUpdate.anomaly_id;
     let anomalyName = segmentsUpdate.name;
@@ -59,15 +59,15 @@ async function updateSegments(req, res) {
     let addedIds = insertSegments(anomalyId, segmentsUpdate.added_segments, true);
     removeSegments(anomalyId, segmentsUpdate.removed_segments);
 
-    let payload = JSON.stringify({ added_ids: addedIds });
-    res.status(200).send(payload);
+    ctx.response.body = { added_ids: addedIds };
 
     runLearning(anomalyId);
   } catch(e) {
-    res.status(500).send({
+    ctx.response.status = 500;
+    ctx.response.body = {
       code: 500,
       message: 'Internal error'
-    });
+    };
   }
 }