http get

#include <stdio.h>
#include <string.h>
#include "..\oscalls.h"

SOCKET soc;
struct sockaddr_in si;
unsigned char dom_name[64];
unsigned char RX_BUF[4*1024];
void initMCU(void){
    YIELD();
    OS_SETGFX(6);
}
C_task main (int argc, char *argv[])
{
    char *a=argv[1],*n=dom_name;
    int len;
    long htmlLen=-1l;
    initMCU();
    if(argc==1){
        puts("Need more parameters");
        return 1;
    }
    while(1){
        unsigned char ch=*a;
        if(ch=='-' || ch=='.' || (ch>='0' && ch<='9') ||
            (ch>='A' && ch<='Z') ||(ch>='a' && ch<='z')) {
            *n++=ch;
            a++;
            continue;
        }
        *n=0;
        break;
    }
    si.sin_addr=*dns_resolver(dom_name);
    si.sin_port=80<<8;
    sprintf(RX_BUF, "GET %s HTTP/1.1\r\nHost: %s\r\n\r\n", a, dom_name);
    soc=socket(AF_INET,SOCK_STREAM,0);
    connect(soc, &si, sizeof(si));
    send(soc,RX_BUF,strlen(RX_BUF),0);
    while(htmlLen){
        len=recv(soc,RX_BUF,sizeof(RX_BUF),0);
        if(len!=0){
            if(len<0){
                puts("Connection closed");
                break;
            }else{
                *(RX_BUF+len)=0;
                if(htmlLen==(-1)){
                    if((n=strstr(RX_BUF,"Content-Length: "))!=0){
                        n+=16;
                        sscanf(n,"%lu",&htmlLen);
                        n=strstr(n,"\r\n\r\n")+4;
                        len=len-(n-RX_BUF);
                    }
                }
                htmlLen-=len;
                puts(RX_BUF);
                continue;
            }
        }else{
            YIELD();
        }
    }
    closesocket(soc,0);
    return 0;
}