ajout backend

backend/server.js

+const koa = require('koa');
+const fs = require('fs');
+const mount = require('koa-mount');
+const static = require('koa-static');
+const path = require('path');
+
+
+//var file = fs.readFile('./public/images/070992.tif', {encoding: 'base64'});
+const app = new koa();
+var WebSocketClient = require('websocket').client;
+var client = new WebSocketClient();
+
+//console.log(file);
+
+client.on('connect', function(connection) {
+    console.log('WebSocket Client Connected');
+
+    console.log(__dirname);
+
+    //connection.sendBytes(request);
+
+    connection.on('error', function(error) {
+        console.log("Connection Error: " + error.toString());
+    });
+
+    connection.on('close', function() {
+        console.log('echo-protocol Connection Closed');
+    });
+
+    connection.on('message', function(message) {
+        console.log("Response: ");
+        console.log(message);
+    });
+
+});
+
+client.connect("ws://xu@vm-sdc-09.icube.unistra.fr:8081");
+// client.connect("ws://127.0.0.1:8081");
+
+
+app.use(mount('/favicon.ico',ctx => {
+    // ignore favicon
+    ctx.state = 200
+}));
+
+
+
+app.use(
+    mount('/other', async (ctx) => {
+
+            ctx.request.req.on('data', async function(data){
+                console.log('received req')
+            })
+            ctx.status = 200
+        }
+    )
+);
+
+
+module.exports = app;