/* send a command to the LCD */
int send_lcd(char *buf) {
int res;
char rcvbuf[256];
size_t outlen;
/* Limit the size of outgoing strings. */
outlen = strlen(buf);
if (outlen > 255) {
outlen = 256;
}
/* send the command */
(void)sockwriteline(sd,buf,outlen);
/* TODO: check return status */
/* read the data */
res=sockreadline(sd,rcvbuf,sizeof(rcvbuf)-1);
/* null-terminate the string before printing */
/* rcvbuf[res-1]=0; FIX-ME: not using this at the moment... */
/* return the result */
return(res);
}
/* Must be at least 128 bytes long */
int http_get_fd(char *URL, size_t *len, char *error)
{
char host[MAX_HOST_LEN+1];
ulong ip_addr;
int s=-1;
int port=80;
char *p;
char *path;
struct sockaddr_in addr;
char header[MAX_HEADER+1];
if(len != NULL)
*len=0;
if(error != NULL)
*error=0;
if(strncasecmp(URL, "http://", 7)) {
if(error!=NULL)
strcpy(error, "URL is not http");
return(-1);
}
strncpy(host, URL+7, MAX_HOST_LEN);
host[MAX_HOST_LEN+1]=0;
if((p=strchr(host,'/'))==NULL) {
if(error!=NULL)
strcpy(error, "Host too long or no path info found");
return(-1);
}
*p=0;
if((p=strchr(host,':'))!=NULL) {
*p=0;
port=atoi(p+1);
}
if((ip_addr=resolve_ip(host))==INADDR_NONE) {
if(error!=NULL)
strcpy(error, "Unable to resolve host");
return(-1);
}
if((path=strchr(URL+7, '/'))==NULL) {
if(error!=NULL)
strcpy(error, "Path info not found");
return(-1);
}
if ((s = socket(AF_INET, SOCK_STREAM, IPPROTO_IP)) < 0) {
if(error!=NULL)
strcpy(error, "Unable to create socket");
return(-1);
}
memset(&addr,0,sizeof(addr));
addr.sin_addr.s_addr = ip_addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
if (connect(s, (struct sockaddr*)&addr, sizeof (addr)) < 0) {
close(s);
if(error!=NULL)
strcpy(error, "Unable to connect");
return(-1);
}
if(error!=NULL)
strcpy(error,"Unable to send request");
if(write(s, "GET ", 4)!=4) {
close(s);
return(-1);
}
if(write(s, path, strlen(path))!=strlen(path)) {
close(s);
return(-1);
}
if(write(s, " HTTP/1.0\r\nHost: ", 17)!=17) {
close(s);
return(-1);
}
if(write(s, host, strlen(host))!=strlen(host)) {
close(s);
return(-1);
}
if(write(s, "\r\nConnection: close\r\n\r\n",23)!=23) {
close(s);
return(-1);
}
if(error!=NULL)
*error=0;
if(sockreadline(s, header, sizeof(header), error) < 0) {
close(s);
return(-1);
}
if(atoi(header+9)!=200) {
if(error != NULL) {
strncpy(error, header, 128);
error[127]=0;
}
close(s);
return(-1);
}
while(header[0]) {
if(sockreadline(s, header, sizeof(header), error) < 0) {
close(s);
return(-1);
}
if(len != NULL && strncasecmp(header,"content-length:",15)==0) {
*len=atol(header+15);
}
}
return(s);
}