HTTPsimple.c File Reference

simple HTTP server example More...

#include <BoardSupport/inc/stdtypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <inttypes.h>
#include <time.h>
#include <string.h>
#include <Libs/NETlib/net.h>
#include <Libs/NETlib/httplib.h>
#include <BoardSupport/inc/BoardSpecific.h>
#include <Common/Common.h>
#include <Common/uartio.h>
#include <Common/timer.h>
#include <Common/CPrintf.h>
#include <BoardSupport/config/netconfig.c>
#include ".\webpage\webpage.c"
#include ".\webpage\webpage.gen"

Functions
int32_t	http_interpreter (httpserv_type *http_server)
	User defined callback function. More...
int	main (void)

Variables
char *	program_name = "HTTP-server"
char *	authentication_key = "Albert:Einstein"

Detailed Description

                          _         _             _
                       __| |    ___(_) ____ _ __ | |_
                      / _` |   / __| |/ _` | '_ \| __|
                     | (_| | _ \__ \ | (_| | | | | |_
                      \__,_|(_) ___/_|\__, |_| |_|\__|
                     Signalprocessing |___/ Technology

Author

D.SignT GmbH & Co. KG, Claus Hermbusche

Date

2019-06-03

This program installs a HTTP server (port 80) with either fix IP 192.168.168.200 (configurable in netconfig.c) or DHCP assigned address (e.g. 192.168.168.143, host name mydemo).

To verify this program, first 'ping' the DSP:

>ping 192.168.168.200

or, if configured for DHCP

>ping mydemo

If the settings and network connections are correct, the pings will be replied.

To see the web page type in your browser:

>http://192.168.168.200/index.htm

or, if configured for DHCP

>http://mydemo/index.htm

All pages and messages are hard-coded via c-variables into the code, but can also be loaded from internal flash.

Function Documentation

int main

(

void

)

Examples:

HTTPsimple.c.

{
    /***************************************************************************
     locals
    ***************************************************************************/
    int main_loop = 1;             /* main loop switch, set to 0 to exit      */
    volatile int32_t http_serv;
    timeval stamp1, stamp2, delta; /* used to determine startup time          */


    /***************************************************************************
      initialize application (e.g. timer clocks, PLL settings, EMIF etc.)
       (ref. \Common\Common.c)
    ***************************************************************************/
    AppInit (GET_CLOCK);

    /***************************************************************************
      select output device for CPrintf  (ref. \Common\cprintf.c)
      possible settings:
        CPRINTF_UART_OUTPUT                       -> output to UART
        CPRINTF_CCS_OUTPUT                        -> output to CCS
        CPRINTF_UART_OUTPUT | CPRINTF_CCS_OUTPUT  -> output to UART and CCS
    ***************************************************************************/
    CPrintf_select_output (CPRINTF_DEFAULT_OUTPUT);  /* default outputs       */

    /***************************************************************************
     print a start up message
    ***************************************************************************/
    START_UP_MESSAGE (BLANK_REV NETLIB_REV);

    /**************************************************************************/
    // CPrintfProgress (" Heap check ");
    // at least 0x10000 bytes required for this app
    /**************************************************************************/
    ASSERT_HEAP (initial_heap_size, 0x10000);
    // CPrintfProgressSuccess();

    /**************************************************************************/
     CPrintfProgress (" Setup system time ");
     // 1 milli seconds resolution
    /**************************************************************************/
    SetupSystemTime ( SYSTEM_TIMER_INT, SYSTEM_TIMER, RES_MSECONDS);
    CPrintfProgressSuccess();
    CPrintf ("   *** timer %d mapped to CPU int %d ***\r\n",
             SystemTimerDev, SYSTEM_TIMER_INT);

    /**************************************************************************/
     CPrintfProgress (" Enable interrupts ");
    /**************************************************************************/
    BoardEnableInterrupts();
    CPrintfProgressSuccess();

    /**************************************************************************/
     CPrintfProgress (" Start system timer ");
    /**************************************************************************/
    StartSystemTimer ();
    CPrintfProgressSuccess();
    CPrintf ("   *** timer %d running at %"PRId32" Hz ***\r\n", SystemTimerDev, RES_SECONDS/GetSystemTimerRes());

    /***************************************************************************
      measure network initialization time
    ***************************************************************************/
    stamp1 = GetTimeStamp();

    /**************************************************************************/
     CPrintfProgress (" Initialize network ");
    /**************************************************************************/
    InitializeNetwork ( 64); // 64 bytes for ping

    /***************************************************************************
      initialize http server; parameter is the specified user list
    ***************************************************************************/
    http_serv = http_server_init ( user,  /* specified user list              */
                                   NULL,  /* mmc not supported                */
                                   HTTP_NO_LIMIT); /* max parallel connections */
                                          /* 0 == no limit (heap limit only)  */

    if ( http_serv == FALSE )
    {
        prg_exit ("http_server_init() failed"); /* possibly insufficient heap */
    }

    /***************************************************************************
     define user callback function
    ***************************************************************************/
    http_define_callback ( http_interpreter);

    /***************************************************************************
     set the authentication for the secure page
       authentication key is Username:Password (case sensitive)
    ***************************************************************************/
    http_set_authentication ("Secure Webpage", authentication_key,
                             &e401, &secure, EFS_TERMINATION, EFS_TERMINATION);
    CPrintfProgressSuccess();
    stamp2 = GetTimeStamp();

    tv_interval (&delta, &stamp1, &stamp2);
    CPuts (" network startup time [sec]: ");
    CPrintf (VT100_RED
             "%"PRId32".%03"PRId32"\r\n"
             VT100_DEFAULT,
              delta.tv_sec,
              delta.tv_usec/1000);

    CPrintf (" secure webpage account is\r\n  %s  (Username:Password, case sensitive)\r\n ", authentication_key);

    /***************************************************************************
      main program loop: set main_loop to 0 to exit loop
    ***************************************************************************/
    CPuts ("\r\n Entering main loop ...");
    while ( main_loop )
    {
        /***********************************************************************
         process net_isq()
        ***********************************************************************/
        net_isq ();  // process ISQ

        /***********************************************************************
         monitor link status
        ***********************************************************************/
        monitor_link_status (CPrintf);

        /***********************************************************************
         try to detect IP assignment
          if DHCP is used, the assigned IP address may change
        ***********************************************************************/
        monitor_ip_address (CPrintf);

        /***********************************************************************
          call http_server()
        ***********************************************************************/
        http_server ();

        /***********************************************************************
         show that the program is running, perform symbol animation
        ***********************************************************************/
        CPrintAnimatedSymbol ( sym_animate, 200000, ANIMATE_SYMBOLS_COUNT);
    }

    /***************************************************************************
      exit program, shut down peripherals
    ***************************************************************************/
    return (0);
}

Variable Documentation

char* program_name = "HTTP-server"

Examples:

HTTPsimple.c.

char* authentication_key = "Albert:Einstein"

Examples:

HTTPsimple.c.