Method getLastErrorString

main/zzHTTPUpdate.cpp:94–134

* return error code as String * @return String error */

 * @return String error
 */
String HTTPUpdate::getLastErrorString(void) {
  if (_lastError == 0) {
    return String(); // no error
  }

  // error from Update class
  if (_lastError > 0) {
    StreamString error;
    Update.printError(error);
    error.trim(); // remove line ending
    return String("Update error: ") + error;
  }

  // error from http client
  if (_lastError > -100) {
    return String("HTTP error: ") + HTTPClient::errorToString(_lastError);
  }

  switch (_lastError) {
    case HTTP_UE_TOO_LESS_SPACE:
      return "Not Enough space";
    case HTTP_UE_SERVER_NOT_REPORT_SIZE:
      return "Server Did Not Report Size";
    case HTTP_UE_SERVER_FILE_NOT_FOUND:
      return "File Not Found (404)";
    case HTTP_UE_SERVER_FORBIDDEN:
      return "Forbidden (403)";
    case HTTP_UE_SERVER_WRONG_HTTP_CODE:
      return "Wrong HTTP Code";
    case HTTP_UE_SERVER_FAULTY_MD5:
      return "Wrong MD5";
    case HTTP_UE_BIN_VERIFY_HEADER_FAILED:
      return "Verify Bin Header Failed";
    case HTTP_UE_BIN_FOR_WRONG_FLASH:
      return "New Binary Does Not Fit Flash Size";
    case HTTP_UE_NO_PARTITION:
      return "Partition Could Not be Found";
  }

  return String();
}

String getSketchSHA256() {
  const size_t HASH_LEN = 32; // SHA-256 digest length