问题
Is there any way to synchronously execute a thread made with Lwt library?
To be specific, I am trying to run a series of post requests to a server that compute some value and returns a result.
Based on answers provided to this question:
How do I make a simple GET request in OCaml?
I can make it with either low level approach (sockets) or using the Cohttp library.
The low level approach has the advantage of being immediate and straightforward but I would rather stick to the Cohttp (no need for read/write loop etc.). Unfortunately I am completely new to the Lwt and based on:
https://mirage.io/wiki/tutorial-lwt
I understand that the only way to get result from a t to a is to run Lwt_main.run which is suppose to be invoked at top level which is not an option for me.
TL:DR
Is there any way get a result from:
Client.get (Uri.of_string "http://localhost:8080/res")
without calling Lwt_main.run or is calling Lwt_main.run for each request (deep inside a code) not so bad idea ?
回答1:
You can call Lwt_main.run deep inside the program, provided the call is not nested inside an outer call to Lwt_main.run. It sounds like it won't be nested in your case, so you can call it where you make the request.
来源：https://stackoverflow.com/questions/60797475/how-to-synchronously-execute-an-lwt-thread