Re: Is http server and http client possbile?

Thanks Marco.  I will try your suggestion.  However, I was hoping the cgi would send whatever is in its buffer to the client before it goes to another task which is POSTing to a server.

So I am guess its not possible to indicate to the cgi(httpstate *) to send the content of its buffer NOW instead of when its free.



--- In [email protected], "markreds81" <marco@...> wrote:
>
> 
> 
> Yes, it is!
> Server and client don't use the same socket but be sure the MAX_TCP_SOCKET_BUFFERS define is enought.
> 
> In addition keep in mind that httpc_skip_headers() and httpc_read_body() functions can take a while to complete their task due to network delays (especially if you use a slow connection like GPRS but I don't know if it is your context). So during that tasks you should yield to other costates. So try to write your own (co)function based on these ones. You can take a look to the http_client.lib source code. Here an example:
> 
> [...]
> // fill buf with data to post
> // blah, blah, blah
> // s is a pointer to httpc_Socket structure passed as parameter to my confunction
> rc = ((sock_write(s->sock, buf, i) != -1) && (sock_write(s->sock, (byte *)&ev, sizeof(ev)) != -1)) ? 0 : -EIO;
> if (!rc)  {
>    // waiting for a response from the server
>    tm = SEC_TIMER + 5L; // wait max 5 seconds
>    while ((s->state == HTTPC_STATE_HEADER) && (rc >= 0) && (tm > SEC_TIMER)) {
>      // I'm not really interested in headers, I'm just waiting for the body part of the response
>      rc = httpc_read_header(s, NULL, 0, 0);
>      yield;
>    }
>    i = 0;
>    while ((s->state == HTTPC_STATE_BODY) && (rc >= 0) && (i < sizeof(buf)) && (tm > SEC_TIMER)) {
>       rc = httpc_read_body(s, buf + i, sizeof(buf) - i);
>       if (rc > 0) {
>          i += rc;
>          // received a chunk of data from the server
>       }
>       yield;
>    }
> }
> [...]
> 
> 
> In my application (a datalogger connected to internet via GPRS) I wrote my cofunction and it works. I hope this is clear enought and that it can helps you.
> 
> Marco
> 
> 
> --- In [email protected], "racqueldesign" <embeddedsupplies@> wrote:
> >
> > Hi,
> > 
> > I have a HTTP server running and the cgi is working fine.
> > I added http client and now the cgi is taking about 10 seconds to respond.
> > 
> > I think the cgi keeps the response to any HTTP REQUEST until the http client task is complete.  My question is, how do I get the cgi to send the response(infomation in its buffer) immediately?  I added a yield statement hoping to give control back to the http_handler but that didn't work.  I am not sure why my cgi won't send response right-away. Do you guys have any advice?
> > 
> > 
> > while (1) {			
> >   
> >   costate {
> >       http_handler();
> >   }			
> > 			
> >   costate {
> >     yield;  //GIVE CONTROL BACK TO http_handler(), cgi 
> > 			
> >     retval = httpc_init (&hsock, sock);
> >     if (retval)
> >     {
> >        printf ("error %d calling httpc_init()\n", retval);
> >     }
> > 			
> >     retval = httpc_post( &hsock, DEST, 80, FILENAME, NULL, PostUpdate_Msg);
> >     if(retval){
> > 	printf ("error %d calling httpc_post()\n", retval);
> >     }
> > 			
> > 
> >     //Skip Header reading and only read body
> >     httpc_skip_headers(&hsock);   //skip header reading
> >     do
> >     {
> > 	 retval = httpc_read_body( &hsock, PostResponse_msg, 128);
> >     } while(hsock.state == HTTPC_STATE_BODY);
> > 
> >     httpc_close(&hsock);
> >   }
> > }
> >
>