Untitled

#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>
#include <TextFinder.h>

byte MACAdress[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED}; //MAC Adresse
byte IPAdress[] = {10, 0, 12, 12}; //IP Adresse
byte sdPin = 4; //Pin der SD-Karte
int const HTTPPORT = 80;

EthernetServer myServer(HTTPPORT); // Webserver auf angegebenen Port starten

File webFile;

void setup() {
  Ethernet.begin(MACAdress, IPAdress); // Ethernet initialisieren
  myServer.begin();  // Server starten
  Serial.begin(9600);
  Serial.println("ARDUINO - STEUERUNG");
  Serial.println("Initialisiere SD-Karte...");
  if (!SD.begin(sdPin))
  {
    Serial.println(" - Initialisierung der SD-Karte fehlgeschlagen!");
    return;
  }
  Serial.println(" - SD-Karte erfolgreich initialisiert.");

  if (!SD.exists("index.htm"))
  {
    Serial.println(" - Datei (index.htm) wurde nicht gefunden!");
    return;
  }
  Serial.println(" - Datei (index.htm) wurde gefunden.");

  Serial.println();
  Serial.println("Verbraucher schalten");
}

void SendOKpage(EthernetClient &client)
{
   boolean currentLineIsBlank = true;
   char c = client.read();
   client.println("HTTP/1.1 200 OK");
   client.println("Content-Type: text/html");
   client.println("Connection: close");
   client.println();

   webFile = SD.open("index.htm"); //Webseite laden
  if (webFile)
  {
   while(webFile.available())
   {
     client.write(webFile.read()); //Webseite an Client schicken
   }
   webFile.close();
  }
  if (c == '\n')
  {
    currentLineIsBlank = true;
  }
  else if (c != '\n')
  {
    currentLineIsBlank = false;
  }
  delay(1);
  client.stop();
}


void SendAuthentificationpage(EthernetClient &client)
{
          client.println("HTTP/1.1 401 Authorization Required");
          client.println("WWW-Authenticate: Basic realm=\"Secure Area\"");
          client.println("Content-Type: text/html");
          client.println("Connnection: close");
          client.println();
          client.println("<!DOCTYPE HTML>");
          client.println("<HTML>  <HEAD>   <TITLE>Error</TITLE>");
          client.println(" </HEAD> <BODY><H1>401 Unauthorized.</H1></BODY> </HTML>");
}


char linebuf[80];
int charcount=0;
boolean authentificated=false;

void loop() {
  EthernetClient client = myServer.available();
  if (client) {
    Serial.println("new client");
    memset(linebuf,0,sizeof(linebuf));
    charcount=0;
    authentificated=false;
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        linebuf[charcount]=c;
        if (charcount<sizeof(linebuf)-1) charcount++;
        Serial.write(c);
        if (c =='\n' && currentLineIsBlank) {
          if (authentificated)
           SendOKpage(client);
          else
           SendAuthentificationpage(client);
          break;
               }
        if (c == '\n') {
          // you're starting a new line
          currentLineIsBlank = true;
          if (strstr(linebuf,"Authorization: Basic")>0 && strstr(linebuf,"cbGxhOmdlcg==")>0)
            authentificated=true;
          memset(linebuf,0,sizeof(linebuf));
          charcount=0;
        }
        else if (c != '\r') {
          // you've gotten a character on the current line
          currentLineIsBlank = false;
        }
      }
    }
    delay(1);
    client.stop();
    Serial.println("client disconnected");
  }
}