#include <WiFi.h>
#include <WiFiClient.h>
#include <WebServer.h>
const char* ssid = "........";
const char* password = "........";
WebServer server(80);
//Check if header is present and correct
bool is_authentified() {
Serial.println("Enter is_authentified");
if (server.hasHeader("Cookie")) {
Serial.print("Found cookie: ");
String cookie = server.header("Cookie");
Serial.println(cookie);
if (cookie.indexOf("ESPSESSIONID=1") != -1) {
Serial.println("Authentification Successful");
return true;
}
}
Serial.println("Authentification Failed");
return false;
}
//login page, also called for disconnect
void handleLogin() {
String msg;
if (server.hasHeader("Cookie")) {
Serial.print("Found cookie: ");
String cookie = server.header("Cookie");
Serial.println(cookie);
}
if (server.hasArg("DISCONNECT")) {
Serial.println("Disconnection");
server.sendHeader("Location", "/login");
server.sendHeader("Cache-Control", "no-cache");
server.sendHeader("Set-Cookie", "ESPSESSIONID=0");
server.send(301);
return;
}
if (server.hasArg("USERNAME") && server.hasArg("PASSWORD")) {
if (server.arg("USERNAME") == "admin" && server.arg("PASSWORD") == "admin") {
server.sendHeader("Location", "/");
server.sendHeader("Cache-Control", "no-cache");
server.sendHeader("Set-Cookie", "ESPSESSIONID=1");
server.send(301);
Serial.println("Log in Successful");
return;
}
msg = "Wrong username/password! try again.";
Serial.println("Log in Failed");
}
String content = "<html><body><form action='/login' method='POST'>To log in, please use : admin/admin<br>";
content += "User:<input type='text' name='USERNAME' placeholder='user name'><br>";
content += "Password:<input type='password' name='PASSWORD' placeholder='password'><br>";
content += "<input type='submit' name='SUBMIT' value='Submit'></form>" + msg + "<br>";
content += "You also can go <a href='/inline'>here</a></body></html>";
server.send(200, "text/html", content);
}
//root page can be accessed only if authentification is ok
void handleRoot() {
Serial.println("Enter handleRoot");
String header;
if (!is_authentified()) {
server.sendHeader("Location", "/login");
server.sendHeader("Cache-Control", "no-cache");
server.send(301);
return;
}
String content = "<html><body><H2>hello, you successfully connected to esp8266!</H2><br>";
if (server.hasHeader("User-Agent")) {
content += "the user agent used is : " + server.header("User-Agent") + "<br><br>";
}
content += "You can access this page until you <a href=\"/login?DISCONNECT=YES\">disconnect</a></body></html>";
server.send(200, "text/html", content);
}
//no need authentification
void handleNotFound() {
String message = "File Not Found\n\n";
message += "URI: ";
message += server.uri();
message += "\nMethod: ";
message += (server.method() == HTTP_GET) ? "GET" : "POST";
message += "\nArguments: ";
message += server.args();
message += "\n";
for (uint8_t i = 0; i < server.args(); i++) {
message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
}
server.send(404, "text/plain", message);
}
void setup(void) {
Serial.begin(115200);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
Serial.println("");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
server.on("/", handleRoot);
server.on("/login", handleLogin);
server.on("/inline", []() {
server.send(200, "text/plain", "this works without need of authentification");
});
server.onNotFound(handleNotFound);
//here the list of headers to be recorded
const char * headerkeys[] = {"User-Agent", "Cookie"} ;
size_t headerkeyssize = sizeof(headerkeys) / sizeof(char*);
//ask server to track these headers
server.collectHeaders(headerkeys, headerkeyssize);
server.begin();
Serial.println("HTTP server started");
}
void loop(void) {
server.handleClient();
}