how to get json from Wemos using ArduinoJson 6 ?

Projects Programming
1 
#include <ArduinoJson.h>
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <ESP8266WebServer.h>

#define HTTP_REST_PORT 80
#define WIFI_RETRY_DELAY 500
#define MAX_WIFI_INIT_RETRY 50

const char* wifi_ssid = "ssid";
const char* wifi_passwd = "password";

byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
ESP8266WebServer server(HTTP_REST_PORT);

void handleRoot() {
  server.send(200, "text/plain", "hello from esp8266!\n\n go to /json or /get to request value.");
}

void handleJson(){
    // Allocate a temporary JsonDocument
  // Use arduinojson.org/v6/assistant to compute the capacity.
  StaticJsonDocument<500> doc;

  // Create the "analog" array
  JsonArray analogValues = doc.createNestedArray("analog");
  for (int pin = 0; pin < 6; pin++) {
    // Read the analog input
    int value = analogRead(pin);

    // Add the value at the end of the array
    analogValues.add(value);
  }

  // Create the "digital" array
  JsonArray digitalValues = doc.createNestedArray("digital");
  for (int pin = 0; pin < 14; pin++) {
    // Read the digital input
    int value = digitalRead(pin);
    // Add the value at the end of the array
    digitalValues.add(value);
  }

  Serial.print(F("Sending: "));
  serializeJson(doc, Serial);
  Serial.println();
  WiFiClient client;
  // Write response headers
  client.println(F("HTTP/1.0 200 OK"));
  client.println(F("Content-Type: application/json"));
  client.println(F("Connection: close"));
  client.print(F("Content-Length: "));
  client.println(measureJsonPretty(doc));
  client.println();
  // server.send(200, "application/json", measureJsonPretty(doc));
  // Write JSON document
  serializeJsonPretty(doc, client);
  Serial.println(measureJsonPretty(doc));
  // Disconnect
  client.stop();
}

void setup() {
  // Initialize serial port
  Serial.begin(9600);
  while (!Serial) continue;

   if (init_wifi() == WL_CONNECTED) {
        Serial.print("Connetted to ");
        Serial.print(wifi_ssid);
        Serial.print("--- IP: ");
        Serial.println(WiFi.localIP());
    }
    else {
        Serial.print("Error connecting to: ");
        Serial.println(wifi_ssid);
    }
  server.on("/", handleRoot);
  server.on("/json", handleJson);
  // Start to listen
  server.begin();
  Serial.println("HTTP server started");
}

void loop() {
 //webserver
  server.handleClient();
 
}

int init_wifi() {
    int retries = 0;

    Serial.println("Connecting to WiFi AP..........");

    WiFi.mode(WIFI_STA);
    WiFi.begin(wifi_ssid, wifi_passwd);
    // check the status of WiFi connection to be WL_CONNECTED
    while ((WiFi.status() != WL_CONNECTED) && (retries < MAX_WIFI_INIT_RETRY)) {
        retries++;
        delay(WIFI_RETRY_DELAY);
        Serial.print("#");
    }
    return WiFi.status(); // return the WiFi connection status
}

I have written this code above trying make it work with ArduinoJson 6. but when I try to access http://ip_addess/json url I get nothing.
I suppose client should work fine with how I have implemented but this doesn't seems to be working.
:o