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https function - Printable Version

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+--- Thread: https function (/showthread.php?tid=3184)

https function - benanderson_475 - 19.02.2021

i make dynamic function to call https command and to add headers like the below,

Code:
function Https_message(method, url, payload, add_headers) --method is "POST", "GET" "PUT" etc

htps = require("ssl.https")
msg_response = {}
hders = {} 
 
  if payload or add_headers then
   
    if payload then
    hders = { ["Accept"] = "*/*",
          ["Content-Type"] = "application/json",
          ["Content-Length"] = #payload,
          ['Host']  = ip..':'..port}
    else
      hders = { ["Accept"] = "*/*", ["Content-Type"] = "application/json", ['Host']  = ip..':'..port}
    end
   
    if add_headers then
  for k, v in pairs(add_headers) do
    hders[k] = v
   end
  end
   
  end
 
local res, err, res_headers, status = htps.request
  {
    url = url,
    method = method,
    protocol = 'tlsv12',
    headers = hders,
    verify = "none",
   
  source = ltn12.source.string(payload),        
  sink = ltn12.sink.table(msg_response)
  }
  return msg_response, err, res_headers
end

My problem is, if i call get command like
Code:
local msg_response, err, Https_message('GET', 192.168.1.1:443/etc/etc, nil, nil)
log(msg_response, err)
with var payload set to nil, the msg_response var returns nil,
i think because, source = ltn12.source.string(payload) would be nil


2 Questions
1- Is the ltn12.source tied together with the ltn12.sink if the source var is present?
2- How can i ignore the ltn12.source if function payload var is set to nil?

RE: https function - admin - 22.02.2021

Do not set the source if payload is not provided:
Code:
local source

if payload then
  source = ltn12.source.string(payload)
end

...

local res, err, res_headers, status = htps.request({
  ...
  source = source, -- source will be nil if payload is not provided
  ...
})

There's another issue with your code when payload or add_headers are set: ip/port variables are not set, so the function call will produce an error. You can use socket.url to parse the url into parts: http://w3.impa.br/~diego/software/luasocket/url.html#parse