HTTP Client for C6678L

murad qahwash

Where can I find a sample project for running the C6678L EVK DSP as an HTTP Client "not an HTTP server". I want the DSP to send a packet to a server running at a PC. when the server receives the packet, it stores it in a database

using CCSv5.2, NDK 2.21, MCSDK 2.00.07

Regards,

Murad

over 13 years ago

0 Steven Connell over 13 years ago

TI__Mastermind 45025 points

Hi Murad,

Unfortunately there is no example of running as an HTTP Client.

However, the HTML APIs for server side responses (found in ti/ndk/nettools/html directory) can be used as an example.

The idea is that you want to build a string that contains the HTML code you want to send, and then send that string across.

Looking at the the API httpSendErrorHTML() (found in httpsend.c), it uses sprintf() to build the HTTP error message.

static void httpSendErrorHTML( SOCKET Sock, int StatusCode )
{
    char Data[80];
    int i;

    // Build the HTML response
    sprintf( Data, "<html><body><h1>HTTP/1.0 %3d -", StatusCode );
    for(i=0;codestr[i].code && codestr[i].code!=StatusCode;i++);
    strcat( Data, codestr[i].string );
    strcat( Data,"</h1></body></html>" );

    // Send the length of the HTML response
    httpSendEntityLength(Sock, strlen(Data));

    // Send the respone data
    httpSendClientStr( Sock, Data );
}

You would want to build the client side command in a similar manner.

Steve

0 ArunMani over 13 years ago in reply to Steven Connell

TI__Genius 9915 points

Hi Steven, we have a client example in MCSDk. I beleive that it sets up a web server and that might be a good reference to start. Please advise.

Thanks,

Arun.

0 murad qahwash over 13 years ago in reply to ArunMani

Genius 3770 points

Thank you Steven and ArunMani,

It seems that the Project "Client" ArunMani refering to is still assume that the DSP is the server side and the PC is the Client!!??...it has web pages to load to memory and to serve the Client side.

Regards,

Murad

0 BhavinKharadi over 13 years ago in reply to murad qahwash

TI__Genius 9020 points

Murad,

The MCSDK example is using DSP as a SERVER. You are also correct in the understanding that it has webpages loaded in memory which are sent to Client on request.

Regards,

Bhavin

0 murad qahwash over 13 years ago in reply to BhavinKharadi

Genius 3770 points

I am using the "Client" example of the NDK...I added a udp client task and using socket API (from "spraax4" and I can see the packets in my PC using "WireShark"...When I modified the code for TCP client, I got a Timeout error...the two codes are shown below if you can help me fix the TCP code.

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

//--------------------------------------------------------------------------

// NDK LAB 3A: UDP sender using sockets programming

//--------------------------------------------------------------------------

// Author: Rafael de Souza, Arnie Reynoso

//--------------------------------------------------------------------------

#include <stdio.h>

#include <ti/ndk/inc/netmain.h>

#include <ti/ndk/inc/_stack.h>

char sendBuffer[1500];

char recvBuffer[1500];

char *UnicastAddr = "192.168.2.101"; // PC address

void udp_Client()

{

SOCKET send = INVALID_SOCKET;

// Sender socket.

struct sockaddr_in sout1; // Sender socket address structure

int sentCnt;

// Allocate the file environment for this task

fdOpenSession( TaskSelf() );

// Create the send socket

send = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

if( send == INVALID_SOCKET )

goto leave;

// Send socket: set Port = 5000, IP destination address = ANY

bzero( &sout1,

sizeof(struct sockaddr_in) );

sout1.sin_family = AF_INET;

sout1.sin_len =

sizeof( sout1 );

sout1.sin_port = htons(5000);

// Bind send socket

if ( bind( send, (PSA) &sout1, sizeof(sout1) ) < 0 )

{

printf(

"Send: %d",fdError());

goto leave;

}

strcpy( sendBuffer,

"Are you there?" );

for(;;)

{

sout1.sin_addr.s_addr = inet_addr(UnicastAddr);

// PC address is the destination

sout1.sin_port = htons(7);

// Echo port (7) is where we want to send data

// Send to PC every 5 sec

{

TaskSleep(5000);

sentCnt = sendto( send, sendBuffer, 15, 0, (PSA)&sout1,

sizeof(sout1) );

}

while (sentCnt < 0);

printf (

" Message sent to ethernet \n");

}

leave:

// We only get here on a fatal error - close the sockets

if( send != INVALID_SOCKET )

fdClose( send );

printf(

"Fatal Error\n");

// This task is killed by the system - here, we block

TaskBlock( TaskSelf() );

}

////////////////////////////////////////////////////////////////////////////////////////////////////////

//--------------------------------------------------------------------------

// NDK LAB 3A: UDP sender using sockets programming

//--------------------------------------------------------------------------

// Author: Rafael de Souza, Arnie Reynoso

//--------------------------------------------------------------------------

#include <stdio.h>

#include <ti/ndk/inc/netmain.h>

#includ <ti/ndk/inc/_stack.h>

char sendBuffer[1500];

char recvBuffer[1500];

char *UnicastAddr = "192.168.2.101"; // PC address

void tcp_Client()

{

SOCKET Ssend = INVALID_SOCKET;

// Sender socket.

struct sockaddr_in sout1; // Sender socket address structure

int sentCnt;

// Allocate the file environment for this task

fdOpenSession( TaskSelf() );

// Create the send socket

Ssend = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

if( send == INVALID_SOCKET )

goto leave;

// Send socket: set Port = 80 (HTTP), IP destination address = ANY

bzero( &sout1,

sizeof(struct sockaddr_in) );

sout1.sin_family = AF_INET;

sout1.sin_len =

sizeof( sout1 );

sout1.sin_port = htons(7);

// Bind send socket

// if ( bind( Ssend, (PSA) &sout1, sizeof(sout1) ) < 0 )

// {

// printf("Ssend-bind: %d",fdError());

// goto leave;

// }

//MQ: Connect send socket

sout1.sin_addr.s_addr = inet_addr(UnicastAddr);

// PC address is the destination

sout1.sin_port = htons(80);

// HTTP port (80) is where we want to send data

if ( connect( Ssend, (PSA) &sout1, sizeof(sout1) ) < 0 )

{

printf(

"Ssend-connect: %d",fdError());

goto leave;

}

strcpy( sendBuffer,

"Are you there?" );

for(;;)

{

// Send to PC every 5 sec

{

TaskSleep(5000);

//http404(Ssend);

sentCnt = send( Ssend, sendBuffer, 15, 0);

}

while (sentCnt < 0);

printf (

" Message sent to ethernet \n");

}

leave:

// We only get here on a fatal error - close the sockets

if( Ssend != INVALID_SOCKET )

fdClose( Ssend );

printf(

"Fatal Error\n");

// This task is killed by the system - here, we block

TaskBlock( TaskSelf() );

}

0 Steven Connell over 13 years ago in reply to murad qahwash

TI__Mastermind 45025 points

Hi Murad,

Were you able to resolve your issue with the suggestions I provided previously?

Steve

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HTTP Client for C6678L