Nelson Neves / GSL_02-Network_HttpClient_Get

Simple code to demonstrate how to make an HTTP GET request to fetch data from a specific file form an URL. Note: Demo program to be used on the GeekSessionLab Talk (November 2011). http://devrendezvous.com/?lang=en

Dependencies:   EthernetNetIf mbed

main.cpp@0:81f7bb57ffcf, 2011-10-27 (annotated)

Committer:
botdream
Date:
Thu Oct 27 22:34:13 2011 +0000
Revision:
0:81f7bb57ffcf
GeekSessionLab talk.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
botdream 0:81f7bb57ffcf 1 //---------------------------------------------------------------------------------------------
botdream 0:81f7bb57ffcf 2 #include "mbed.h"
botdream 0:81f7bb57ffcf 3 #include "EthernetNetIf.h"
botdream 0:81f7bb57ffcf 4 #include "HTTPClient.h"
botdream 0:81f7bb57ffcf 5 //---------------------------------------------------------------------------------------------
botdream 0:81f7bb57ffcf 6 DigitalOut myled(LED1);
botdream 0:81f7bb57ffcf 7 Serial pc(USBTX, USBRX); // tx, rx
botdream 0:81f7bb57ffcf 8 //---------------------------------------------------------------------------------------------
botdream 0:81f7bb57ffcf 9 #define internaldebug // send debug messages to USB Serial port (9600,1,N)
botdream 0:81f7bb57ffcf 10 #define dhcpenable // auto-setup IP Address from DHCP router
botdream 0:81f7bb57ffcf 11 //---------------------------------------------------------------------------------------------
botdream 0:81f7bb57ffcf 12 // Ethernet Object Setup
botdream 0:81f7bb57ffcf 13 //---------------------------------------------------------------------------------------------
botdream 0:81f7bb57ffcf 14 #ifdef dhcpenable
botdream 0:81f7bb57ffcf 15 EthernetNetIf eth;
botdream 0:81f7bb57ffcf 16 #else
botdream 0:81f7bb57ffcf 17 EthernetNetIf eth(
botdream 0:81f7bb57ffcf 18 IpAddr(192,168,1,100), //IP Address
botdream 0:81f7bb57ffcf 19 IpAddr(255,255,255,0), //Network Mask
botdream 0:81f7bb57ffcf 20 IpAddr(192,168,1,254), //Gateway
botdream 0:81f7bb57ffcf 21 IpAddr(192,168,1,254) //DNS
botdream 0:81f7bb57ffcf 22 );
botdream 0:81f7bb57ffcf 23 #endif
botdream 0:81f7bb57ffcf 24
botdream 0:81f7bb57ffcf 25 HTTPClient http;
botdream 0:81f7bb57ffcf 26 //---------------------------------------------------------------------------------------------
botdream 0:81f7bb57ffcf 27 // MAIN
botdream 0:81f7bb57ffcf 28 //---------------------------------------------------------------------------------------------
botdream 0:81f7bb57ffcf 29 int main()
botdream 0:81f7bb57ffcf 30 {
botdream 0:81f7bb57ffcf 31 // Set Serial Port Transfer Rate
botdream 0:81f7bb57ffcf 32 pc.baud(115200);
botdream 0:81f7bb57ffcf 33
botdream 0:81f7bb57ffcf 34 //--------------------------------------------------------
botdream 0:81f7bb57ffcf 35 // Setting Ethernet
botdream 0:81f7bb57ffcf 36 //--------------------------------------------------------
botdream 0:81f7bb57ffcf 37 #ifdef internaldebug
botdream 0:81f7bb57ffcf 38 printf("\r\nSetting up Ethernet interface!\r\n");
botdream 0:81f7bb57ffcf 39 #endif
botdream 0:81f7bb57ffcf 40 // Create return object for error check
botdream 0:81f7bb57ffcf 41 EthernetErr ethErr = eth.setup();
botdream 0:81f7bb57ffcf 42 if(ethErr)
botdream 0:81f7bb57ffcf 43 {
botdream 0:81f7bb57ffcf 44 #ifdef internaldebug
botdream 0:81f7bb57ffcf 45 printf("\r\nError %d in Ethernet setup.\r\n", ethErr);
botdream 0:81f7bb57ffcf 46 #endif
botdream 0:81f7bb57ffcf 47 return -1;
botdream 0:81f7bb57ffcf 48 }
botdream 0:81f7bb57ffcf 49 #ifdef internaldebug
botdream 0:81f7bb57ffcf 50 printf("\r\nEthernet setup completed with success!\r\n");
botdream 0:81f7bb57ffcf 51 #endif
botdream 0:81f7bb57ffcf 52 //--------------------------------------------------------
botdream 0:81f7bb57ffcf 53
botdream 0:81f7bb57ffcf 54 //--------------------------------------------------------
botdream 0:81f7bb57ffcf 55 // HTTP Get Request
botdream 0:81f7bb57ffcf 56 //--------------------------------------------------------
botdream 0:81f7bb57ffcf 57 HTTPText txt;
botdream 0:81f7bb57ffcf 58
botdream 0:81f7bb57ffcf 59 HTTPResult r = http.get("http://botdream.com/robots.txt", &txt);
botdream 0:81f7bb57ffcf 60 if(r==HTTP_OK)
botdream 0:81f7bb57ffcf 61 {
botdream 0:81f7bb57ffcf 62 printf("Result :\"%s\"\n", txt.gets());
botdream 0:81f7bb57ffcf 63 }
botdream 0:81f7bb57ffcf 64 else
botdream 0:81f7bb57ffcf 65 {
botdream 0:81f7bb57ffcf 66 printf("Error %d\n", r);
botdream 0:81f7bb57ffcf 67 }
botdream 0:81f7bb57ffcf 68 //--------------------------------------------------------
botdream 0:81f7bb57ffcf 69
botdream 0:81f7bb57ffcf 70 // main loop
botdream 0:81f7bb57ffcf 71 while(1)
botdream 0:81f7bb57ffcf 72 {
botdream 0:81f7bb57ffcf 73 myled = 1;
botdream 0:81f7bb57ffcf 74 wait(0.5);
botdream 0:81f7bb57ffcf 75 myled = 0;
botdream 0:81f7bb57ffcf 76 wait(0.5);
botdream 0:81f7bb57ffcf 77 }
botdream 0:81f7bb57ffcf 78 }
botdream 0:81f7bb57ffcf 79 //---------------------------------------------------------------------------------------------