An experimental request aware load balancer. This is useful if you are dealing with a custom TCP protocol. There is a catch though, both downstream (the clients) and upstream (servers) need to add the following header to every request/response, so that the load balancer knows the length of each message.
+-----+------+------+------+---------+---------+---------+---------+
| B0 | B1 | B2 | B3 | B4 | B5 | B6 | B7 |
+-----+------+------+------+---------+---------+---------+---------+
| VER | RES1 | RES2 | RES3 | MSG_LEN | MSG_LEN | MSG_LEN | MSG_LEN |
+-----+------+------+------+---------+---------+---------+---------+
B0: It's used for versioning, write 0x01.
B1: A reserved byte, write 0x00.
B2: A reserved byte, write 0x00.
B3: A reserved byte, write 0x00.
B4-7: Message length. 32 bit unsigned integer, in little endian byte order.
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