Use of \r \n in value passed to `RedisModule_ReplyWithSimpleString` redis

I have a simple module that implements new type in redis storage. This type holds simple string. User can save such string set-myType key value User can get string get-myType key

I faced with problem that if value contains \r or \n in a value I can't reply to a user. It fails with Bad simple string value

I investigated code of redis_module API and found that this error refers to hiredis during such check

for (int i = 0; i < len; i++) {
        if (p[i] == '\r' || p[i] == '\n') {
            __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
                     "Bad simple string value");
        return REDIS_ERR;
    }
}

Redis itself add such symbols to my reply during ReplyWithSimpleString

int RM_ReplyWithSimpleString(RedisModuleCtx *ctx, const char *msg) {
    client *c = moduleGetReplyClient(ctx);
    if (c == NULL) return REDISMODULE_OK;
    addReplyProto(c,"+",1);
    addReplyProto(c,msg,strlen(msg));
    addReplyProto(c,"\r\n",2);  // HERE
    return REDISMODULE_OK;
}

Common redis command get key handles such symbols just fine.

My question: is there any possibility to store value with \n or \r and successfully reply with it to user via ReplyWithSimpleString or any other API.

Since your value might contain '\r' and '\n', you should call RedisModule_ReplyWithStringBuffer. This method returns a Bulk String Reply instead of Simple String Reply, and it's binary safe.