TextMessage.toString() throws StringIndexOutOfBoundsException if payload contains multibyte characters [SPR-12307]

[spring-projects-issues]

Shinobu Aoki opened SPR-12307 and commented

TextMessage.toStringPayload throws StringIndexOutOfBoundsException if a payload-bytes is greater than 10 and a payload-length less than 10.
This method throws an exception in the following code.

new TextMessage("\u3042\u3044\u3046\u3048\u304a").toString();

Stacktrace:
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 10
at java.lang.String.substring(String.java:1950)
at org.springframework.web.socket.TextMessage.toStringPayload(TextMessage.java:79)
at org.springframework.web.socket.AbstractWebSocketMessage.toString(AbstractWebSocketMessage.java:91)
at samples.websocket.config.SampleWebSocketsApplication.main(SampleWebSocketsApplication.java:58)

Pull request:
#657

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Affects: 4.0.7, 4.1.1

Referenced from: commits da14aee, da2c30c

Backported to: 4.0.8