How to access request_http_api() functions from other scripts than init?

[mpathy]

Hi there!

I have extended a existing mod plugin (classroom) to provide additional functionality.
Most of the functionality is in another program on another server and will be called over an REST API call.

Now I added the buttons and wanted to do the http requests, but it doesnt work.

I already found out that it can be only called in init.lua - but how can I access it from there?
When I define a function I cant use it in another lua script in my mod.

[rubenwardy]

You need to pass it in to other files.

init.lua:

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local http = minetest.request_http_api()

local path = minetest.get_modpath("mymod")
loadfile(path .. "/myscript.lua")(http)

myscript.lua:

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local http = ...

Files are functions in Lua. loadfile loads a file as a function. dofile is, in fact, implemented using loadfile like so:

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function dofile(path)
	local func = assert(loadfile(path))
	return func()
end

[Badkraft]

I did not know you could do this:

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...
loadfile(path .. "/myscript.lua")(http)

... But then in my script.lua you have:

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local http = ...

Can you finish that line? Is it http since that is the variable you passed in the loadfile command?

[rubenwardy]

Can you finish that line? Is it http since that is the variable you passed in the loadfile command?

That is the finished line. ... is used to capture variable arguments as a tuple. You can also use arg, which captures variable arguments as a table.

For example, if you passed in two arguments you could do:

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local one, two = ...

Some info is here, although it doesn't mention using ... explicitly: https://www.lua.org/pil/5.2.html