Sending video(.avi) and audio (.wav) files with arduino script from ESP32S3 via http post multipart/form-data to server

Projects Programming
12

At the start of the response, there are 407 available bytes, and the Content-Length of the body is 255. The buffer is only

    char buf[200];  // buffer big enough for expected response

So making that at least 408 (don't forget the trailing null) will read the rest. The stack might be getting tight though; so better yet, to print the whole response regardless of size and return the status code, use instead

int statusFromResponse(WiFiClient &client) {
  size_t p = 0;
  size_t available = 0;
  // wait for first byte
  while (client.connected()) {
    if (available = client.available()) {
      break;
    }
    delay(1);
    p++;
  }
  if (!available) {
    Serial.println("not connected");
    return 0;
  }
  Serial.printf("waited %d for %d available --->\n", p, available);

  int code = -1;
  size_t t = 0;
  char buf[200];

  while (client.connected() && available) {
    p = client.read((uint8_t *)buf, std::min(available, sizeof(buf) - 1));
    if (t == 0) {
      sscanf(buf, "HTTP/%*s %d", &code);
    }
    t += p;
    buf[p] = 0;
    Serial.print(buf);
    available = client.available();
  }
  Serial.printf("<---\n%d total\n", t);
  return code;
}

and so the two function calls are replaced with a single one, with no buffer

    Serial.printf("status: %d\n", statusFromResponse(wifi));

If we're lucky, the remaining 200-ish bytes will have useful details.

1 Like