/*
* HttpGet - issue a GET command and write received data to output
*
* return 1 if successful, 0 otherwise
*/
GLOBALREF int HttpGet(const char *host, const char *outputfile, const char *path,
int *size, netbuf *nControl, unsigned int offset)
{
char buf[256];
if(offset > 0)
sprintf(buf, "GET %s HTTP/1.1\r\nHost: %s\r\nRange: bytes=%d-\r\n\r\n", path, host, offset);
else
sprintf(buf, "GET %s HTTP/1.1\r\nHost: %s\r\n\r\n", path, host);
if(!HttpSendCmd(buf,'2',nControl))
{
if (nControl->response[9] == '3')
printf("redirection not supported\n");
return 0;
}
while (1)
{
int ret = 0;
char *buf = nControl->response;
while (ret < 256) {
if (socket_wait(nControl) != 1)
return 0;
if (net_read(nControl->handle,buf,1) != 1)
break;
ret++;
if (*buf == '\r') continue;
if (*buf == '\n') break;
buf++;
}
*buf = 0;
if (strstr(nControl->response,"Content-Length"))
{
sscanf(nControl->response,"Content-Length: %d",size);
if(offset > 0)
*size += offset;
}
if (strlen(nControl->response) == 0)
break;
}
return HttpXfer(outputfile, path, size, nControl, FTPLIB_FILE_READ, FTPLIB_IMAGE);
}
/*
* HttpGet - issue a GET command and write received data to output
*
* return 1 if successful, 0 otherwise
*/
GLOBALREF int HttpGet(const char *host, const char *outputfile, const char *path,
int *size, netbuf *nControl, unsigned int offset,
const struct tm *mtime1, struct tm *mtime2)
{
char buf[512];
sprintf(buf, "GET %s HTTP/1.1\r\nHost: %s\r\n", path, host);
if (offset > 0)
sprintf(buf, "%sRange: bytes=%d-\r\n", buf, offset);
if (mtime1 && mtime1->tm_year)
{
char mtime[30];
/* Format:
* "If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT\r\n" */
strftime(mtime, sizeof(mtime), "%a, %d %b %Y %H:%M:%S GMT", mtime1);
sprintf(buf, "%sIf-Modified-Since: %s\r\n", buf, mtime);
}
sprintf(buf, "%s\r\n", buf);
if (!HttpSendCmd(buf,'2',nControl))
{
if (nControl->response[9] == '3')
{
/* If the answer from the server is 304, the requested file
* hasn't been modified: no need to retrieve it */
if (mtime1 && mtime1->tm_year && nControl->response[11] == '4')
return 0;
/* otherwise, it is a redirection */
printf("redirection not supported\n");
}
return 0;
}
while (1)
{
int ret = 0;
char *buf = nControl->response;
while (ret < 256) {
if (socket_wait(nControl) != 1)
return 0;
if (net_read(nControl->handle,buf,1) != 1)
break;
ret++;
if (*buf == '\r') continue;
if (*buf == '\n') break;
buf++;
}
*buf = 0;
if (strstr(nControl->response,"Content-Length"))
{
sscanf(nControl->response,"Content-Length: %d",size);
if (offset > 0)
*size += offset;
}
else if (mtime2 && strstr(nControl->response,"Last-Modified"))
{
/* Format:
* "Last-Modified: Sat, 29 Oct 1994 19:43:31 GMT\r\n" */
char *c = nControl->response+20;
int mint, j;
static const int months[12] = {
('J'<<16)|('a'<<8)|'n',
('F'<<16)|('e'<<8)|'b',
('M'<<16)|('a'<<8)|'r',
('A'<<16)|('p'<<8)|'r',
('M'<<16)|('a'<<8)|'y',
('J'<<16)|('u'<<8)|'n',
('J'<<16)|('u'<<8)|'l',
('A'<<16)|('u'<<8)|'g',
('S'<<16)|('e'<<8)|'p',
('O'<<16)|('c'<<8)|'t',
('N'<<16)|('o'<<8)|'v',
('D'<<16)|('e'<<8)|'c'
};
mtime2->tm_mday = (c[0]-'0')*10+c[1]-'0';
mint = (c[3]<<16)|(c[4]<<8)|c[5];
mtime2->tm_mon = 0;
for(j = 0; j < 12; j++)
{
if (mint == months[j])
{
mtime2->tm_mon = j;
break;
}
}
mtime2->tm_year = ((c[7]-'0')*10+(c[8]-'0')-19)*100;
mtime2->tm_year += (c[9]-'0')*10+c[10]-'0';
mtime2->tm_hour = (c[12]-'0')*10+c[13]-'0';
mtime2->tm_min = (c[15]-'0')*10+c[16]-'0';
mtime2->tm_sec = (c[18]-'0')*10+c[19]-'0';
}
if (strlen(nControl->response) == 0)
break;
}
return HttpXfer(outputfile, path, size, nControl, FTPLIB_FILE_READ, FTPLIB_IMAGE);
}
