Description
The current implementation of writeString and maybe also writeProperty and writeKey has the problem, that the length (s:<length>) of multibyte strings is not written correctly. This results on the PHP side in unserialize() [function.unserialize]: Error at offset ...
Unfortunately, you must give the length of a serialized string in bytes instead of characters. However, the byte count depends on the character encoding.
When testing the serializer with a servlet I didn't immediately notice this, because the standard encoding of the output is ISO-8859-1 (one character is always one byte). Only when switching to UTF-8 (response. setCharacterEncoding("UTF-8") and using german umlauts the problem came up.
My instant fix for UTF-8 looks like this:
Writer.java:
...
import static java.nio.charset.StandardCharsets.UTF_8;
...
public void writeString(String value)
{
setState(state.value());
buffer.append("s:");
buffer.append(value.getBytes(UTF_8).length);
buffer.append(":\"");
buffer.append(value);
buffer.append("\";");
}
...It would certainly be better if the desired character encoding could be given to the writer.
Translated with www.DeepL.com/Translator.