Method handle_post

Tools/AP_Bootloader/network.cpp:380–475

handle an incoming HTTP POST request */

  handle an incoming HTTP POST request
 */
void BL_Network::handle_post(SocketAPM *sock, uint32_t content_length)
{
    /*
      skip over form boundary. We don't care about the filename as we
      only support one file
     */
    uint8_t state = 0;
    while (true) {
        char c;
        if (sock->recv(&c, 1, 100) != 1) {
            return;
        }
        content_length--;
        // absorb up to \r\n\r\n
        if (c == '\r') {
            if (state == 2) {
                state = 3;
            } else {
                state = 1;
            }
        } else if (c == '\n') {
            if (state == 1 || state == 3) {
                state++;
            } else {
                state = 0;
            }
            if (state == 4) {
                break;
            }
        } else {
            state = 0;
        }
    }
    /*
      erase all of flash
     */
    status_printf("Erasing ...");
    flash_set_keep_unlocked(true);
    uint32_t sec=0;
    while (flash_func_sector_size(sec) != 0 &&
           flash_func_erase_sector(sec)) {
        thread_sleep_ms(10);
        sec++;
        if (stm32_flash_getpageaddr(sec) - stm32_flash_getpageaddr(0) >= content_length) {
            break;
        }
    }
    /*
      receive file and write to flash
     */
    uint32_t buf[128];
    uint32_t ofs = 0;

    // must be multiple of 4
    content_length &= ~3;

    const uint32_t max_ofs = MIN(BOARD_FLASH_SIZE*1024, content_length);
    uint8_t last_pct = 0;