not all content is downloaded

I try to download a picture from web server and save to SD.
First what I see is a negative content length.
Content length is: -16328
Way?

The picture content starts with 0x42, 0x4D .... on start index 0.
ID: 0 0x42
ID: 1 0x4D
....
so far so good....

the while loop stops on index 49047 but the full size is 49207

Whats wrong with your example code?

here my code

    if (responseCode == 200) {
      responseCode = http.skipResponseHeaders();
      if (responseCode >= 0) {
        int bodyLen = http.contentLength();

        Serial.print("Content length is: ");
        Serial.println(bodyLen);

        unsigned long timeoutStart = millis();
        char c;
        long i = 0;
        // Whilst we haven't timed out & haven't reached the end of the body
        while ( (http.connected() || http.available()) &&
                ((millis() - timeoutStart) < 30000) ) {

          if (http.available()) {
            c = http.read();

            Serial.print("ID: ");
            Serial.print(i);
            Serial.print("\t");
            Serial.print(c);
            Serial.print("\t");
            Serial.println(c, HEX);

            i++;
            myFile.print(c);
            bodyLen--;
            // We read something, reset the timeout counter
            timeoutStart = millis();
          }
          else
          {
            // We haven't got any data, so let's pause to allow some to arrive.
            wait(1000);
          }
        }

        if (!http.connected()) {
          Serial.println("disconnecting.");
          http.stop();
          myFile.close();
          Serial.println("Finished writing to file");
        }
      }
    }