ESP8266 Community Forum

- Wed Jun 10, 2020 5:51 pm #87505 Hello everybody,

after the verification of the basic ESP8266WebServer functionality on my ESP8266 I wanted to refactor some setup methods into an own Class (which basically is an abstraction layer to the ESP8266WebServer class). Therefore I created an ESP8266WebServer pointer as a member of the class "Webserver" (see appended Code "Webserver.h" and "Webserver.cpp").
I now want to configure the server root route ("/") to serve the static HTML file "index.html" from SPIFFS. However when I use the "serveStatic" method as shown in "Webserver.cpp" my esp returns an empty response (ERR_EMPTY_RESPONSE) when accessing it via browser (this worked previously so it has to do with refactoring into a separate class).

After investigating this issue it turned out that others had similar issues (e.g. https://www.esp8266.com/viewtopic.php?f=32&t=4505 and https://stackoverflow.com/questions/43479328/how-to-pass-class-member-function-as-handler-function) when using the "server.on()" method in an encapsulated ESP8266WebServer instance. I verified that the fix would work, when I use "server.on()" (see comment in "Webserver.cpp"). However I was not able to apply the suggested fix (using std::bind) for my purpose.

I appreciate any suggestions and feedback.

Best regards,
GuyWithCookies

Webserver.h

Code: Select all/**
 * Class that handles webserver initalization
 **/

#ifndef WEBSERVER_H
#define WEBSERVER_H

#include <ESP8266HTTPClient.h>
#include <AutoConnect.h>

class Webserver {
public:
    Webserver();
    bool setup();
    void handleClient();
    void handleRoot();

private:
    ESP8266WebServer* server;

    void setupWebserverRoutes();
    bool setupFileSystem();
};

#endif


Webserver.cpp

Code: Select all#include "Webserver.h"

#include <AutoConnect.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <iostream>

Webserver::Webserver() {
    std::cout << "Create webserver instance" << std::endl;
    this->server = new ESP8266WebServer();
}

void Webserver::handleRoot(){
    char content[]  = "Hello world";
    this->server->send(200, "text/plain", content);
}

void Webserver::setupWebserverRoutes() {
     // Using "server.on" works (hello world is displayed in browser).
    // However I need to serve the index.html instead which uses serveStatic and produces the aforementioned
    // issue
    //this->server->on("/",  std::bind(&Webserver::handleRoot, this));
     this->server->serveStatic("/", SPIFFS, "/index.html");
};

bool Webserver::setupFileSystem() {
    if (!SPIFFS.begin()) {
        Serial.println("SPIFFS Mount failed");
        return false;
    } else {
        Serial.println("SPIFFS Mount successfull");
        return true;
    }
};


bool Webserver::setup() {
    // Setup all routes for the website
    Webserver::setupWebserverRoutes();

    if (!Webserver::setupFileSystem()) {
        return false;
    }

    this->server->begin()
    return true;
}

void Webserver::handleClient() {
    this->server->handleClient();
}