GWT 2.12 CSP RPC escapeString 64KB limit

[codeart1st]

GWT version: 2.12.0

---

Description

gwt/user/src/com/google/gwt/user/server/rpc/impl/ServerSerializationStreamWriter.java

Lines 443 to 451 in c2229e7

	// If there's another segment left, insert a '+' operator.
	if (splitNodes && i < length) {
	charVector.add(JS_QUOTE_CHAR);
	charVector.add('+');
	charVector.add(JS_QUOTE_CHAR);
	if (array != null) {
	array.setJavaScript(true);
	}
	}

gwt/user/src/com/google/gwt/user/server/rpc/impl/ServerSerializationStreamWriter.java

Lines 867 to 875 in c2229e7

	private void writeHeader(LengthConstrainedArray stream) {
	stream.addToken(getFlags());
	if (stream.isJavaScript() && getVersion() >= SERIALIZATION_STREAM_JSON_VERSION) {
	// Ensure we are not using the JSON supported version if stream is Javascript instead of JSON
	stream.addToken(SERIALIZATION_STREAM_JSON_VERSION - 1);
	} else {
	stream.addToken(getVersion());
	}
	}

Version 8 (CSP friendly) is only used, if isJavaScript is falsy. There is still some code, which sets isJavaScript to true if escaped strings are bigger thant 64 KBytes.

Steps to reproduce

Serialize a string bigger than 64 KBytes with GWT-RPC.

[codeart1st]

Relates to #9578 and #9961

Didn't see in the first place.

gwt/user/src/com/google/gwt/user/server/rpc/impl/ServerSerializationStreamWriter.java

Lines 348 to 349 in c2229e7

	private static final int MAX_STRING_NODE_LENGTH =
	Integer.getInteger("gwt.rpc.maxStringNodeLength", 0xFFFF);