Re: [lwip-users] POST data using several packets

[Jesper Vestergaard]

Kieran Mansley wrote:
> On Wed, 2009-06-24 at 14:03 +0200, Jesper Vestergaard wrote:
>   
> > what is the prober way of assembling 
> > the data from a arbitrary number of packets?
> >     
>
> Call netconn_recv() repeatedly and concatenate the data you get until
> you have as much as you want.
>
> Kieran
>   
I have tried calling netconn_recv() repeatedly but a problem has 
occured. I get the data fine but when i will respond to the request with 
netconn_write(pxNetCon, cDynamicPage, (u16_t)strlen( cDynamicPage ), 
NETCONN_COPY ); no data is being sent. The code for retrieving the data 
is here:

/pxNetCon->recv_timeout=20;
    
   /* Data is ready */
   pxRxBuffer = netconn_recv( pxNetCon );     

       pcRxString = pvPortMalloc( mem_size );
       do
       {
           /* Where is the data? */
           netbuf_data( pxRxBuffer, ( void * ) &(pcRxString2), 
&usLength );
                
           /* Allocate memory for the data */
           mem_size = mem_size + usLength;
           pcRxString = pvPortRealloc( pcRxString, (mem_size) );
        
           /* In the first iteration we can copy the data as it is */
           if (mem_size == usLength)
           {
               memcpy(pcRxString, pcRxString2, usLength);
           }
           else
           {
               pcRxString3 = pvPortMalloc( usLength + 1 );
               memcpy(pcRxString3, pcRxString2, usLength);
               /* We use string functions on a char array so add a null 
terminator */
               pcRxString3[usLength] = '\0';
               strcat( pcRxString, pcRxString3 );
               vPortFree( pcRxString3 ); 
           }         
           netbuf_free( pxRxBuffer );
           pxRxBuffer = netconn_recv( pxNetCon );
           //pxRxBuffer = NULL;
       }
       /* if theres is no more packets in the buffer proceed */
       while (pxRxBuffer != NULL);/


If I comment the pxRxBuffer = netconn_recv( pxNetCon ); line and 
uncomment pxRxBuffer = NULL; The data is sent like it should.
What is causing that and how do i fix it so i can recive multiple 
packets but still respond to the request?/
/