Multiple message in TCP communication with flow

[Wenke-D]

Hello there,

I was trying to build a TCP server to handle some client requests, I followed example in the README, it works.

But when I make multiple messages in one connection directly with flow, both sides got blocked. What I did is

Server: flow.read_all for reading then use flow.copy_string for writing. Client: flow.copy_string for writing then flow.read_all for reading

My guess is that the data is client data is not send to the server, but buffered somehow, so server get blocked by the read_all, so the client get blocked by the second read_all. The example in the README works, because the server fibre closed, so the data get to flushed to the client.

Later, I switch to Buf_read and Buf_write to explicitely indicate what to write and to read, add line break to my string message and use Buf_read.line to read data from flow. This works, I can send multiple messages.

I am wondering if I use it correctly, because I don't have too much network programming experience before. If it is, maybe it is a good example to put into the README. I can do the honour if needed.

Best

[talex5]

read_all has to wait until the connection is shut down in order to read all the data. Could that be the problem?

[Wenke-D]

read_all has to wait until the connection is shut down in order to read all the data. Could that be the problem?

Yes, this is the problem, I was looking for something simple like Unix.flush.

[Wenke-D]

Thanks for the explanation !