hi,
i have written a HTTP client to connect to my local host and retrive a
static webpage on my machine. i have got rid of the syntax errors, but
am not able to debug the program. if neone can plz help me out wid
this,
-Nachiketh
Code :
#include<stdio.h>
#include<sys/socket.h>
#include<sys/types.h>
#include<arpa/inet.h>
#include<string.h>
#define SERV_PORT 80
#define SERV_ADDR "127.0.0.1"
int readn(int fd,char* msg,int maxlen)
{
int n=1,rc;
char c;
printf("reading");
for(n=1;n<maxlen;n++)
{
if((rc=read(fd,&c,1))==1)
{
printf("%c",&c);
*msg++=c;
if(c=='\n')
{
printf("%s",msg);
break;
}
}
else if(rc==0)
{
if(n==1)
return 0; /* EOF, no data read */
else
break; /* EOF, some data was read */
}
else
return -1; /*error */
}
*msg=0;
return n;
}
int writen(int sockfd,char*msg,int nbytes)
{
int nleft,nwritten;
nleft=nbytes;
printf("Start writing Bytes = %d Mesg=%s\n", nbytes,msg);
while(nleft>0)
{
nwritten=write(sockfd,msg,nleft);
printf("WRITEN0 :nwritten=%d\n", nwritten);
if(nwritten <= 0)
{ printf("WRITEN 1:%d",nwritten);
return(nwritten); //error
}
printf("WRITE01:%d\n",nwritten);
nleft-=nwritten;
msg+=nwritten;
}
printf("WRITEN2 :%d,%d\n",nbytes,nleft);
return(nbytes-nleft);
}
main()
{
struct sockaddr_in sock;
int sfd,n,i;
char buff[200],reply[250];
buff[0] =0, reply[0] = 0;
sfd = socket(AF_INET,SOCK_STREAM,0);
if (sfd < 0) { printf("Unable to open socket\n"); exit(0); }
bzero((char*)&sock,sizeof(socket));
sock.sin_family = AF_INET;
sock.sin_port = htons(SERV_PORT);
sock.sin_addr.s_addr = inet_addr(SERV_ADDR);
if(connect(sfd,(struct sockaddr *)&sock,sizeof(sock))<0)
{ printf("Unable to connect to server\n");
}
else
{
strcpy(buff,"GET /home/nachi/LatestVersion.html HTTP/1.0\r\n");
printf("%s",buff);
n = strlen(buff);
printf("main:N = %d\n",n);
i = writen(sfd,buff,n);
printf("\n%d\n",i);
if(i != n)
printf (" Write Error \n");
//printf("success0!");
else {
printf("success1!");
if(readn(sfd,reply,250)<0)
{
printf("read error\n");
}
//printf("success2!");
else
printf ("read: %s ",reply);
}
}
close(sfd);
}
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