JSONTextMessageMapper fails when parsing rawMessage

[momed-sakka]

Describe the bug

When using JSONTextMessageMapper with websocket and struct type, RapidJson Parse receive always empty rawmsg.
The empty message created here. The root cause looks due to passing payload string by reference which get cast to void* instead of passing char*.
potential fix tested: pass &payload[0]

To Reproduce

import csp
from csp import ts
from datetime import datetime, timedelta
from csp.adapters.websocket import JSONTextMessageMapper, WebsocketAdapterManager

class TopOfBook(csp.Struct):
    u:int
    symbol:str
    b:str
    B:str
    a:str
    A: str
    


@csp.graph
def g(uri: str):
    print("Trying to connect to", uri)
    ws = WebsocketAdapterManager(uri, verbose_log=True)
    
    data = ws.subscribe(TopOfBook, JSONTextMessageMapper(), 
                        push_mode=csp.PushMode.LAST_VALUE)
    status = ws.status()
  
    csp.print("status", status)
    csp.print("data", data)
    
 
if __name__ == '__main__':
    csp.run(g, 
            uri="wss://stream.binance.com:9443/ws/btcusdt@bookTicker",
            starttime=datetime.utcnow(),
            endtime=timedelta(minutes=1),
            realtime=True)

Expected behavior

no error expected.

Error Message

empty message see above

Runtime Environment

import sys, csp; print(csp.version); print(sys.version); print(sys.platform)
0.0.3
3.11.9 | packaged by conda-forge | (main, Apr 19 2024, 18:36:13) [GCC 12.3.0]
linux

Additional context

note that the version used was built locally from source using conda env as described in your wiki.