tokio | Web scraping made simple | Functional Testing library

I know this question has been asked many times, but I still can't figure out what to do (more below).

I'm trying to spawn a new thread using std::thread::spawn and then run an async loop inside of it.

The async function I want to run:

I'm trying to get clokwerk to schedule an asynchronous function to run every X seconds.

The docs show this example:

I would like to read a GRIB file downloaded from server using ecCodes library in Rust. However, my current solution results in segmentation fault. The extracted example, replicating the problem, is below.

I download the file using reqwest crate and get the response as Bytes¹ using bytes(). To read the file with ecCodes I need to create a codes_handle using codes_grib_handle_new_from_file()², which as argument requires *FILE usually get from fopen(). However, I would like to skip IO operations. So I figured I could use libc::fmemopen() to get *FILE from Bytes. But when I pass the *mut FILE from fmemopen() to codes_grib_handle_new_from_file() segmentation fault occurs.

I suspect the issue is when I get from Bytes a *mut c_void required by fmemopen(). I figured I can do this like that:

I am using reqwest, and am trying to send a request every 97 ms. But, I do not want to have to wait for the last request to happen or for it to be read.

I just want a request to send every 97 ms and to be sending the output at all times to stdout.

my (current) code is like this: (keys is an array with api keys)

I want to create a actix-web server where I can provide my Search trait as application data in order to easily swap between multiple implementations or use mock implementation for testing. Whatever I try I can't get it to compile or when I get it to compile I get the following error when visiting the route in the web browser:

App data is not configured, to configure use App::data()

Here is what I have so far

I am trying to use the binance_async library, tokio, and futures to make concurrent orders to Binance. (See notes at the end of this question.)
The binance_async functions I'm using return a binance_async::error::Result> type. I am facing the following issue, illustrated in these 2 examples:

1. Say I'm trying to do this:

This is the continuation of `RefCell` cannot be shared between threads safely?, made a new Q for better presentation.

I made a minimal main with a Mutex, but now test_for_closure does not live long enough and is dropped here while still borrowed. What a ride! :)

Rust playground link: https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=7bf56545350624e75aafa10524ea59ff

Suppose a loop on main like this:

I am new to rust and working on a tool which interacts with the Binance API. The API returns a response like so: