René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"java.lang.OutOfMemoryError: Java heap space when decoding non GPP string","articleBody":"Add the following test in GppModelTest.java file.\r\n\r\n```\r\n  // java.lang.OutOfMemoryError: Java heap space\r\n  @Test\r\n  public void testDecodingExceptionValidStringButNotGPP() {\r\n    try {\r\n      GppModel gppModel = new GppModel(\"CP48G0AP48G0AEsACCPLAkEgAAAAAEPgAB5YAAAQaQD2F2K2kKFkPCmQWYAQBCijYEAhQAAAAkCBIAAgAUgQAgFIIAgAIFAAAAAAAAAQEgCQAAQABAAAIACgAAAAAAIAAAAAAAQQAAAAAIAAAAAAAAEAAAAAAAQAAAAIAABEhCAAQQAEAAAAAAAQAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAgAA\");\r\n      Assertions.fail(\"Expected LazyDecodingException\");\r\n    } catch (DecodingException e) {\r\n\r\n    }\r\n  }\r\n```\r\n\r\nThe proposed solution is to validate the first 2 numbers in the header of the message, to fail fast if the string is not GPP.\r\nSo, in HeaderV1.java:\r\n```\r\n  private static final String ID_BITSTRING = \"000011\";\r\n  private static final String VERSION_BITSTRING = \"000001\";\r\n  private static final String HEADER_PREFIX_BITSTRING = ID_BITSTRING + VERSION_BITSTRING;\r\n  @Override\r\n  public void decode(String encodedString) throws DecodingException {\r\n    String bitString = base64UrlEncoder.decode(encodedString);\r\n    if (!bitString.startsWith(HEADER_PREFIX_BITSTRING)) {\r\n      throw new DecodingException(\"Not GPP v1 string\");\r\n    };\r\n    this.decodeFromBitString(bitString);\r\n  }\r\n\r\n```\r\n","author":{"url":"https://github.com/alex-ro","@type":"Person","name":"alex-ro"},"datePublished":"2024-01-26T07:37:47Z","url":"https://github.com/IABTechLab/iabgpp-java/issues/44"}