[fix] readdir synchronously

server.js

@@ -115,63 +115,59 @@ var update_submission = (socket, sessionID) => {
         socket.emit('info', 'Got output')
 
         // Read output dir
-        fs.readdir(output_dir, (err, files) => {
-            if (err) {
-                console.log(err)
-                return
-            }
+        files = fs.readdirSync(output_dir)
+        // Read each result in txt file
+        files.forEach(file => {
+            if (path.extname(file) === '.txt') {
+                var i = 0
 
-            // Read each result in txt file
-            files.forEach(file => {
-                if (path.extname(file) === '.txt') {
-                    var i = 0
+                // Result object
+                var obj = {}
+                obj.name = file
 
-                    // Result object
-                    var obj = {}
-                    obj.name = file
+                try {
+                    // read contents of the file
+                    const data = fs.readFileSync(output_dir + file, 'UTF-8')
 
-                    try {
-                        // read contents of the file
-                        const data = fs.readFileSync(output_dir + file, 'UTF-8')
+                    // split the contents by new line
+                    const lines = data.split(/\r?\n/)
 
-                        // split the contents by new line
-                        const lines = data.split(/\r?\n/)
-
-                        lines.forEach((line) => {
-                            i = i + 1
-                            // The first line is the fitness
-                            if(i == 1) {
-                                var fitness = parseFloat(line)
-                                if(fitness < 0) {
-                                    obj.fitness = parseInt(line)
-                                }
-                                else {
-                                    obj.fitness = fitness
-                                }
+                    lines.forEach((line) => {
+                        i = i + 1
+                        // The first line is the fitness
+                        if(i == 1) {
+                            var fitness = parseFloat(line)
+                            if(fitness < 0) {
+                                obj.fitness = parseInt(line)
                             }
-                            // The second line is the path
-                            else if (i == 2) {
-                                // Only read when there is no error
-                                if(obj.fitness > 0) {
-                                    solution_array = line.split(",")
-                                    for(var j = 0; j < solution_array.length; j++) {
-                                        solution_array[i] = parseInt(solution_array[i], 10)
-                                    }
-                                    obj.solution = solution_array
-                                }
-                                else {
-                                    obj.solution = []
-                                }
+                            else {
+                                obj.fitness = fitness
                             }
-                        })
-                    } catch (err) {
-                        console.error(err)
-                    }
-                    res.push(obj)
+                        }
+                        // The second line is the path
+                        else if (i == 2) {
+                            // Only read when there is no error
+                            if(obj.fitness > 0) {
+                                solution_array = line.split(",")
+                                for(var j = 0; j < solution_array.length; j++) {
+                                    solution_array[i] = parseInt(solution_array[i], 10)
+                                }
+                                obj.solution = solution_array
+                            }
+                            else {
+                                obj.solution = []
+                            }
+                        }
+                    })
+                } catch (err) {
+                    console.error(err)
                 }
-            })
+                console.log(obj)
+                res.push(obj)
+            }
         })
         if (res.length === 0) {
+            console.log(res)
             socket.emit('error', 'Please check my_model.py')
         }
         socket.emit('result', JSON.stringify(res))