static void file_uploader_handler(TinyWebServer& web_server, TinyWebPutHandler::PutAction action, char* buffer, int size)
{
static char *boundary = NULL;
static size_t boundary_len = 0;
static CircularBuffer<char, 128> cb;
static enum state { search_begin=0, search_data, in_data} st;
static int file_size = 0;
static char *fname;
switch (action) {
case TinyWebPutHandler::START:
{
fname = web_server.get_file_from_path(web_server.get_path());
const char *ct = web_server.get_header_value("Content-Type");
if (!ct) break;
boundary = strstr(ct, "boundary=");
if (!boundary) break;
boundary += 5;
boundary[0] = '\r';
boundary[1] = '\n';
boundary[2] = '-';
boundary[3] = '-';
boundary_len = strlen(boundary);
D(Serial.print("**** Upload file "));
D(Serial.println(fname));
free(fname);
st = search_begin;
file_size = 0;
break;
}
case TinyWebPutHandler::WRITE:
for (int i = 0; i < size; i++) {
D(Serial.write(*buffer));
cb.push(*buffer++);
switch(st) {
case search_begin:
if (cb.remain() < boundary_len-2) break;
if (cb.match(boundary+2, boundary_len-2)) {
st = search_data;
D(Serial.println("search_data"));
cb.flush();
}
else {
cb.pop();
}
break;
case search_data:
if (cb.remain() < 4) break;
if (cb.match("\r\n\r\n", 4)) {
st = in_data;
D(Serial.println("in_data"));
cb.flush();
}
else {
cb.pop();
}
break;
case in_data:
if (cb.remain() < boundary_len) break;
if (cb.match(boundary, boundary_len)) {
st = search_data;
D(Serial.println("search_data"));
cb.flush();
}
else {
if (file_size == 0) lduino.ClearProgram();
char c = cb.pop();
file_size++;
lduino.LoadProgramLine(c);
}
break;
};
}
break;
case TinyWebPutHandler::END:
D(Serial.println("**** END"));
D(Serial.print("file size "));
D(Serial.println(file_size));
Client& client = web_server.get_client();
String status;
if (file_size > 0 && lduino.getProgramReady()) {
status += F("<font color='green'>New ladder program uploaded - file size: ");
status += file_size;
status += F(" bytes</font>");
}
else {
status += F("<font color='red'>Upload aborted</font>");
}
main_page(client, status);
break;
}
}
