#include <ESP8266WiFi.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <FS.h>
#define DBG_OUTPUT_PORT Serial
const byte DNS_PORT = 53;
const char *ssid = "B4X - Captive Portal";
IPAddress apIP(192, 168, 1, 1);
DNSServer dnsServer;
ESP8266WebServer webServer(80);
void setup() {
WiFi.mode(WIFI_AP);
WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));
WiFi.softAP(ssid);
// if DNSServer is started with "*" for domain name, it will reply with
// provided IP to all DNS request
dnsServer.start(DNS_PORT, "*", apIP);
//start debug port
DBG_OUTPUT_PORT.begin(115200);
DBG_OUTPUT_PORT.print("\n");
DBG_OUTPUT_PORT.setDebugOutput(true);
SPIFFS.begin();
//redirect all traffic to index.html
webServer.onNotFound([]() {
if(!handleFileRead(webServer.uri()))
{
const char *metaRefreshStr = "<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD XHTML 1.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/xhtml1\/DTD\/xhtml1-transitional.dtd\">\r\n<html xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\" >\r\n<head>\r\n <title><\/title>\r\n <style type=\"text\/css\">\r\n .style1\r\n {\r\n font-family: Arial, Helvetica, sans-serif;\r\n font-weight: bold;\r\n }\r\n <\/style>\r\n<\/head>\r\n<body>\r\n\r\n <p class=\"style1\">\r\n This page was created to demonstrate that it is possible to make a Captive \r\n Portal with the ESP8266.<\/p>\r\n <p class=\"style1\">\r\n Created by Alberto Iglesias<\/p>\r\n\r\n<\/body>\r\n<\/html>\r\n";
webServer.send(200, "text/html", metaRefreshStr);
}
});
webServer.begin();
}
void loop() {
dnsServer.processNextRequest();
webServer.handleClient();
}
String getContentType(String filename){
if(webServer.hasArg("download")) return "application/octet-stream";
else if(filename.endsWith(".htm")) return "text/html";
else if(filename.endsWith(".html")) return "text/html";
else if(filename.endsWith(".css")) return "text/css";
else if(filename.endsWith(".js")) return "application/javascript";
else if(filename.endsWith(".png")) return "image/png";
else if(filename.endsWith(".gif")) return "image/gif";
else if(filename.endsWith(".jpg")) return "image/jpeg";
else if(filename.endsWith(".ico")) return "image/x-icon";
else if(filename.endsWith(".xml")) return "text/xml";
else if(filename.endsWith(".pdf")) return "application/x-pdf";
else if(filename.endsWith(".zip")) return "application/x-zip";
else if(filename.endsWith(".gz")) return "application/x-gzip";
return "text/plain";
}
//Given a file path, look for it in the SPIFFS file storage. Returns true if found, returns false if not found.
bool handleFileRead(String path){
DBG_OUTPUT_PORT.println("handleFileRead: " + path);
if(path.endsWith("/")) path += "index.html";
String contentType = getContentType(path);
String pathWithGz = path + ".gz";
if(SPIFFS.exists(pathWithGz) || SPIFFS.exists(path)){
if(SPIFFS.exists(pathWithGz))
path += ".gz";
File file = SPIFFS.open(path, "r");
size_t sent = webServer.streamFile(file, contentType);
file.close();
return true;
}
return false;
}
