Adafruit_CC3000_Server vs Adafruit_CC3000_ClientRef

hello

these codes of wifi cc3000

i have question 2 lines

#define listen_port 80
adafruit_cc3000_server robotserver(listen_port);

and another

adafruit_cc3000_clientref client = robotserver.available();


what doing adafruit_cc3000_server ,adafruit_cc3000_clientref in general & in code ?

code: [select]

  #include <adafruit_cc3000.h>
#include <ccspi.h>
#include <spi.h>
#include <string.h>
#include "utility/debug.h"
#include <stdlib.h>

// must control pins
#define adafruit_cc3000_irq   3
// these can 2 pins
#define adafruit_cc3000_vbat  8
#define adafruit_cc3000_cs    10

string result;


const unsigned long
  dhcptimeout     = 60l * 1000l, // max time wait address dhcp "l" mean long number avoid overflow
  connecttimeout  = 15l * 1000l, // max time wait server connection
  responsetimeout = 15l * 1000l; // max time wait data server
uint32_t t;//standard #include <stdlib.h>

// definetion name , pass of network
#define wlan_ssid       "00"        // cannot longer 32 characters!
#define wlan_pass       "00"
#define wlan_security   wlan_sec_wpa2 // can wlan_sec_unsec, wlan_sec_wep, wlan_sec_wpa or wlan_sec_wpa2

//create object spesfy ecah pins , connected
adafruit_cc3000 cc3000 = adafruit_cc3000(adafruit_cc3000_cs, adafruit_cc3000_irq, adafruit_cc3000_vbat,
                                         spi_clock_div2);
#define listen_port 8888
adafruit_cc3000_server robotserver(listen_port);
// connect to  wifi network
void setup() {
   
  serial.begin(115200);
 
  result = "";

  /* initialise module */
  serial.println(f("\ninitializing..."));
  if (!cc3000.begin())
  {
    serial.println(f("couldn't begin()! check wiring?"));
    while(1);
  }
  if (!cc3000.connecttoap(wlan_ssid, wlan_pass, wlan_security)) {
    serial.println(f("failed!"));
    while(1);
  }
   
  serial.println(f("connected!"));
 
  serial.println(f("request dhcp"));
  while (!cc3000.checkdhcp())
  {
    delay(100); // todo: insert dhcp timeout!
  } 

  /* display ip address dns, gateway, etc. */
 
  while (! displayconnectiondetails()) {
    delay(1000);
  }
 
  // start listening connections
  robotserver.begin();
 
  serial.println(f("listening connections..."));
 
}

void loop() {
 
  // try client connected.
  adafruit_cc3000_clientref client = robotserver.available();
  if (client) {
     boolean currentlineisblank = true;
     // check if there data available read.
     while (client.available()) {
     
       char c = client.read();
       result = result + c;
       serial.write(c);
       
       // delete http headers
      if(result.endswith("content-type: text/html"))
      {
        result="";
      }
       
       if (c == '\n' && currentlineisblank) {
          // send standard http response header
          client.println("http/1.1 200 ok");
          client.println("content-type: text/html");
          client.println("connection: close");
          client.println();         
       }
       if (c == '\n') {
          // you're starting new line
          currentlineisblank = true;
        }
        else if (c != '\r') {
          // you've gotten character on current line
          currentlineisblank = false;
        }
       
     }
     // give web browser time receive data
    delay(5);
    // close connection:
    client.close();
    serial.println("client disconnected");
   
    // format result , extract variables
   
     result = "";
  }
           
}

   
    bool displayconnectiondetails(void){

  uint32_t ipaddress, netmask, gateway, dhcpserv, dnsserv;
 
  if(!cc3000.getipaddress(&ipaddress, &netmask, &gateway, &dhcpserv, &dnsserv))
  {
    serial.println(f("unable retrieve ip address!\r\n"));
    return false;
  }
  else
  {
    serial.print(f("\nip addr: ")); cc3000.printipdotsrev(ipaddress);
    serial.print(f("\nnetmask: ")); cc3000.printipdotsrev(netmask);
    serial.print(f("\ngateway: ")); cc3000.printipdotsrev(gateway);
    serial.print(f("\ndhcpsrv: ")); cc3000.printipdotsrev(dhcpserv);
    serial.print(f("\ndnsserv: ")); cc3000.printipdotsrev(dnsserv);
    serial.println();
    return true;
  }

    }

the first line:

code: [select]

#define listen_port 80
adafruit_cc3000_server robotserver(listen_port);
says arduino server, , that, server, listens port 80. clients can connect server using port.

the second line:

code: [select]

adafruit_cc3000_clientref client = robotserver.available();
checks server, see if client has connected. if so, client object valued, , arduino can determine client wants.

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