Zoltan Hudak / Mbed OS HTTPServer_Echo_ENC28J60

A simple HTTP server echoing received requests. Ethernet connection is over an ENC28J60 board. Usage: Type the server's IP address into you web browser and hit <ENTER>.

Dependencies:   UIPEthernet

main.cpp@2:519b6ae198ae, 2015-11-27 (annotated)

Committer:
hudakz
Date:
Fri Nov 27 20:35:35 2015 +0000
Revision:
2:519b6ae198ae
Parent:
1:9c602cc98b9f
Child:
3:f3bfd257e138
Now also shows how to use DHCP.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hudakz 2:519b6ae198ae 1 /*
hudakz 0:8b40576553d2 2 * In this example the HTTP request (text) received from a browser is echoed (sent back) to the browser.
hudakz 0:8b40576553d2 3 * Ethernet connection is via an ENC28J60 board driven by UIPEthernet
hudakz 0:8b40576553d2 4 */
hudakz 0:8b40576553d2 5 #include "mbed.h"
hudakz 0:8b40576553d2 6 #include <UIPEthernet.h>
hudakz 0:8b40576553d2 7 #include <UIPServer.h>
hudakz 0:8b40576553d2 8 #include <UIPClient.h>
hudakz 0:8b40576553d2 9
hudakz 2:519b6ae198ae 10 Serial pc(USBTX, USBRX);
hudakz 2:519b6ae198ae 11
hudakz 2:519b6ae198ae 12 #define DHCP 1 // comment out this line if you are not using DHCP
hudakz 2:519b6ae198ae 13
hudakz 0:8b40576553d2 14 // UIPEthernet is the name of a global instance of UIPEthernetClass.
hudakz 2:519b6ae198ae 15
hudakz 0:8b40576553d2 16 // Do not change the name! It is used within the UIPEthernet library.
hudakz 0:8b40576553d2 17 // Adapt the SPI pin names to your mbed platform/board if not present yet.
hudakz 0:8b40576553d2 18 #if defined(TARGET_LPC1768)
hudakz 2:519b6ae198ae 19 UIPEthernetClass UIPEthernet(p11, p12, p13, p8); // mosi, miso, sck, cs
hudakz 0:8b40576553d2 20 #elif defined(TARGET_LPC1114)
hudakz 2:519b6ae198ae 21 UIPEthernetClass UIPEthernet(dp2, dp1, dp6, dp25); // mosi, miso, sck, cs
hudakz 0:8b40576553d2 22 #elif defined(TARGET_LPC11U68)
hudakz 2:519b6ae198ae 23 UIPEthernetClass UIPEthernet(P0_9, P0_8, P1_29, P0_2); // mosi, miso, sck, cs
hudakz 2:519b6ae198ae 24 #elif defined(TARGET_NUCLEO_F103RB)
hudakz 2:519b6ae198ae 25 UIPEthernetClass UIPEthernet(D11, D12, D13, D10); // mosi, miso, sck, cs
hudakz 2:519b6ae198ae 26 #elif defined(TARGET_NUCLEO_F103RB)
hudakz 2:519b6ae198ae 27 UIPEthernetClass UIPEthernet(D11, D12, D13, D10); // mosi, miso, sck, cs
hudakz 2:519b6ae198ae 28 #elif defined(TARGET_NUCLEO_F401RE)
hudakz 2:519b6ae198ae 29 UIPEthernetClass UIPEthernet(D11, D12, D13, D10); // mosi, miso, sck, cs
hudakz 2:519b6ae198ae 30 #elif defined(TARGET_NUCLEO_F411RE)
hudakz 2:519b6ae198ae 31 UIPEthernetClass UIPEthernet(D11, D12, D13, D10); // mosi, miso, sck, cs
hudakz 2:519b6ae198ae 32 #endif
hudakz 2:519b6ae198ae 33 // MAC number must be unique within the connected network. Modify as appropriate.
hudakz 2:519b6ae198ae 34
hudakz 2:519b6ae198ae 35 const uint8_t MY_MAC[6] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
hudakz 2:519b6ae198ae 36
hudakz 2:519b6ae198ae 37 #if !defined(DHCP)
hudakz 2:519b6ae198ae 38 // IP address must be unique and compatible with your network. Change as appropriate.
hudakz 2:519b6ae198ae 39 const IPAddress MY_IP(192, 168, 1, 181);
hudakz 0:8b40576553d2 40 #endif
hudakz 0:8b40576553d2 41
hudakz 2:519b6ae198ae 42 const uint16_t MY_PORT = 80; // for HTTP connection
hudakz 2:519b6ae198ae 43 EthernetServer myServer = EthernetServer(MY_PORT);
hudakz 2:519b6ae198ae 44 Serial serial(USBTX, USBRX);
hudakz 2:519b6ae198ae 45
hudakz 2:519b6ae198ae 46 /**
hudakz 2:519b6ae198ae 47 * @brief
hudakz 2:519b6ae198ae 48 * @note
hudakz 2:519b6ae198ae 49 * @param
hudakz 2:519b6ae198ae 50 * @retval
hudakz 2:519b6ae198ae 51 */
hudakz 2:519b6ae198ae 52
hudakz 2:519b6ae198ae 53 int main(void) {
hudakz 2:519b6ae198ae 54 pc.printf("Searching for DHCP server.\r\n");
hudakz 2:519b6ae198ae 55 pc.printf("It takes some time. Please wait..\r\n");
hudakz 0:8b40576553d2 56
hudakz 2:519b6ae198ae 57 #if defined(DHCP)
hudakz 2:519b6ae198ae 58 if(UIPEthernet.begin(MY_MAC) != 1) {
hudakz 2:519b6ae198ae 59 pc.printf("No DHCP server found.\r\n");
hudakz 2:519b6ae198ae 60 pc.printf("Exiting application\r\n");
hudakz 2:519b6ae198ae 61 return 0;
hudakz 2:519b6ae198ae 62 }
hudakz 2:519b6ae198ae 63
hudakz 2:519b6ae198ae 64 pc.printf("DHCP server found and configuration info received\r\n");
hudakz 2:519b6ae198ae 65
hudakz 2:519b6ae198ae 66 IPAddress localIP = UIPEthernet.localIP();
hudakz 2:519b6ae198ae 67 pc.printf("Local IP = ");
hudakz 2:519b6ae198ae 68 for(uint8_t i = 0; i < 3; i++)
hudakz 2:519b6ae198ae 69 pc.printf("%d.", localIP[i]);
hudakz 2:519b6ae198ae 70 pc.printf("%d\r\n", localIP[3]);
hudakz 2:519b6ae198ae 71 #else
hudakz 2:519b6ae198ae 72 UIPEthernet.begin(MY_MAC, MY_IP);
hudakz 2:519b6ae198ae 73 #endif
hudakz 2:519b6ae198ae 74
hudakz 0:8b40576553d2 75 myServer.begin();
hudakz 0:8b40576553d2 76 while(1) {
hudakz 2:519b6ae198ae 77 EthernetClient client = myServer.available();
hudakz 2:519b6ae198ae 78 if(client) {
hudakz 2:519b6ae198ae 79 size_t size = client.available();
hudakz 0:8b40576553d2 80 if(size > 0) {
hudakz 2:519b6ae198ae 81 char* buf = (char*)malloc(size);
hudakz 0:8b40576553d2 82 size = client.read((uint8_t*)buf, size);
hudakz 0:8b40576553d2 83 if(buf[0] == 'G' && buf[1] == 'E' && buf[2] == 'T') {
hudakz 0:8b40576553d2 84 serial.printf("GET request received:\n\r");
hudakz 0:8b40576553d2 85 serial.printf(buf);
hudakz 2:519b6ae198ae 86 char echoHeader[256] = { };
hudakz 2:519b6ae198ae 87 sprintf
hudakz 2:519b6ae198ae 88 (
hudakz 2:519b6ae198ae 89 echoHeader,
hudakz 2:519b6ae198ae 90 "HTTP/1.1 200 OK\r\nContent-Length: %d\r\nContent-Type: text\r\nConnection: About to close\r\n\r\n",
hudakz 2:519b6ae198ae 91 size
hudakz 2:519b6ae198ae 92 );
hudakz 2:519b6ae198ae 93 client.write((uint8_t*)echoHeader, strlen(echoHeader));
hudakz 0:8b40576553d2 94 client.write((uint8_t*)buf, size);
hudakz 0:8b40576553d2 95 serial.printf("Echo done.\r\n");
hudakz 0:8b40576553d2 96 }
hudakz 0:8b40576553d2 97 free(buf);
hudakz 0:8b40576553d2 98 }
hudakz 0:8b40576553d2 99 }
hudakz 0:8b40576553d2 100 }
hudakz 0:8b40576553d2 101 }