Question

TCP client sends data byte by byte. So, how to tell the server that this message has ended and the new message begins now?

One way is to fix a special character that’ll be sent as a bookmark, but that character can also be a part of the message causing confusions.

Any other optimum way out?

Answer 1

If the message is binary, delimited encoding using a special character is not possible. Tag Length Value (TLV) encoding will be best suited for this.

for example

 +--------+----------+----------------+    
 |  Tag   | Length   |  Content       |    
 | 0x0001 |  0x000C  | "HELLO, WORLD" |    
 +--------+----------+----------------+

in addition to that, you can have more than one message type