[solved]Problem with http post request

Developer's Corner Scene Scripting
#1

Hope i am posting in correct area.

I am having issues sending a https request via a scene using open luup.

The server i am trying to post to will only recieve post request in web form or or json body or cURL.

I am using method 3 here http://wiki.micasaverde.com/index.php/Luup_Scenes_Events#Access_the_web

It works fine using this :

local http = require("socket.http")
  http.TIMEOUT = 5
  result, status = http.request("https://maker.ifttt.com/trigger/##1##/with/key/ghXkfhheysjswjs7sjhdfhdfhgsgpW")

but if i try:

local http = require("socket.http")
  http.TIMEOUT = 5
  result, status = http.request("https://llamalab.com/automate/cloud/message?secret=uf7d8dfhfj43h4h3heyyh43h3usu&to=test@test.com&device=null&priority=high&payload=launch;com.test.test;test;")

it is not recieved.

It all works from automate test page here Automate Cloud Endpoint

Can anyone help me out. Is the request method actuall post?

#2

No, it’s not a POST, it’s a GET.

See documentation for the LuaSocket library here:

You need to use the two parameter version of the request call.

#3 
local http = require("socket.http")
  http.TIMEOUT = 5
  result, status = http.request("https://llamalab.com/automate/cloud/message", "secret=uf7d.8dfhfj43h4h3heyyh43h3usu=&to=test@test.com&device=null&priority=high&payload=launch;com.test.test;test;")

like this, i have tried too but no result

#4

What status return do you get from the request?

#5

I just tried this code snippet, changing the URL to a local test machine which echos the parameters it receives from a request. It responds with this:

{
  "*HEADER:Connection":"close, TE",
  "*HEADER:Content-Length":"115",
  "*HEADER:Content-Type":"application/x-www-form-urlencoded",
  "*HEADER:Host":"172.16.42.126",
  "*HEADER:Te":"trailers",
  "*HEADER:User-Agent":"LuaSocket 2.0.2",
  "CONTENT_LENGTH":"115",
  "CONTENT_TYPE":"application/x-www-form-urlencoded",
  "HTTP_USER_AGENT":"LuaSocket 2.0.2",
  "PATH_INFO":"/",
  "POST_CONTENT":"",
  "REMOTE_HOST":"172.16.42.126",
  "REQUEST_METHOD":"POST",
  "SCRIPT_NAME":"/cgi/test.lua",
  "SERVER_PROTOCOL":"HTTP/1.1",
  "TEST":"table: 0x03c984b0",
  "error":"table: 0x03c983e8",
  "input":"table: 0x03c98328",
  "params":[],
  "req":{
    "GET":[],
    "POST":{
      "device":"null",
      "payload":"launch;com.test.test;test;",
      "priority":"high",
      "secret":"uf7d.8dfhfj43h4h3heyyh43h3usu",
      "to":"test@test.com"
    },
    "app_path":"",
    "cookies":[],
    "doc_root":"",
    "env":"table: 0x03c98488",
    "method":"POST",
    "params":[],
    "parse_post":"function: 0x03dea398",
    "path_info":"/",
    "query_string":"",
    "script_name":"/cgi/test.lua"
  }
}

So it all looks OK.

1 Like
#6

cheers akbooer.
must be somthing in the headers that causing the server to reject the request.

#7

the secret is missing the last character

uf7d.8dfhfj43h4h3heyyh43h3usu

should read

uf7d.8dfhfj43h4h3heyyh43h3usu=

how would i escape that character?

edit/
Well it’s not that have changed secret and format is this : “2.2CboAxRfbtqvDcFz3MhGPKmNgwayBfSnMfz7zL_02EQ”

#8

Again, the status response should give you a clue as to what is wrong.

#9

How do i get a status from a test luup code in the app developer section?

#10

Well, you could write it to he log using luup.log()

…but if you were using the AltUI plugin, you could just use the print statement.

#11

solved, Cheers akbooer

50	12/24/19 18:16:19.093	luup_log:0: <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="robots" content="noindex, nofollow" />
<title>Automate Cloud Endpoint</title>
<link href="/favicon.ico" type="image/vnd.microsoft.icon" rel="icon" />
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container"><div class="row"><div class="col-md-12">
<h1>Message sent</h1>
</div></div></div>
</body>
</html>
 <0x724de520>```
#12

Hi once again.

i have been trying to send post request as json body using

curl, response, http = luup.inet.request { 
    url = "http://192.168.1.25:1880/hello",
    data = {["My parameter"] = "Some value"},
    headers = {accept = "application/json"}
}

info at http://wiki.micasaverde.com/index.php/Luup_Lua_extensions#function:_request

the request is responding 200, but the json is not being passed correctly. the received data is

[45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,102,53,50,99,52,52,48,48,102,56,50,56,52,102,99,50,13,10,67,111,110,116,101,110,116,45,68,105,115,112,111,115,105,116,105,111,110,58,32,102,111,114,109,45,100,97,116,97,59,32,110,97,109,101,61,34,77,121,32,112,97,114,97,109,101,116,101,114,34,13,10,13,10,83,111,109,101,32,118,97,108,117,101,13,10,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,102,53,50,99,52,52,48,48,102,56,50,56,52,102,99,50,45,45,13,10]
#13

Are you using openLuup, or Vera?

I’ve heard that the luup.inet.request() function is flakey on Vera, and neither is it well tested in openLuup (it is a recent edition to the luup library.) See:

#14

I was trying on veraplus.

I have tried multiple codes i have found all over this forum. They ethier fail to run or run but no data is received. i have editted out quote and replaced . i can not get any examples of the os.execute()to work.

here’s another script i have messed with to no avail.

local http = require("socket.http")
local ltn12 = require("ltn12")

function sendRequest()
local path = "http://192.168.1.25:1880/hello"
  local payload = [[ {"key":"My Key","name":"My Name","description":"The description","state":1} ]]
  local response_body = { }

  local res, code, response_headers, status = http.request
  {
    url = path,
    method = "POST",
    headers =
    {
      ["Content-Type"] = "application/json",
      ["Content-Length"] = payload:len()
    },
    source = ltn12.source.string(payload),
    sink = ltn12.sink.table(response_body)
  }
#15

Ok i got this to work have to escape all the ’ quotes.

os.execute('curl -X POST -H \'content-type:application/json\' -d \'{"testpc":"2","0d":"1"}\' http://192.168.1.25:1880/hell')

its very sluggish, and only works intermittently.

Why is this simple task so difficult? i’ve spent hours to day reading and trying different ideas with no reliable outcome.

#16

I’ve tried this Lua script myself, verbatim, with the addition of a missing end statement and changing the URL to run a test CGI on my development machine.

The CGI returns a text representation of the request it receives, including headers and a post data, and gives me this:

{
  "*HEADER:Connection":"close, TE",
  "*HEADER:Content-Length":"77",
  "*HEADER:Content-Type":"application/json",
  "*HEADER:Host":"172.16.42.126",
  "*HEADER:Te":"trailers",
  "*HEADER:User-Agent":"LuaSocket 2.0.2",
  "CONTENT_LENGTH":"77",
  "CONTENT_TYPE":"application/json",
  "HTTP_USER_AGENT":"LuaSocket 2.0.2",
  "PATH_INFO":"/",
  "POST_CONTENT":"",
  "REMOTE_HOST":"172.16.42.126",
  "REQUEST_METHOD":"POST",
  "SCRIPT_NAME":"/cgi/test.lua",
  "SERVER_PROTOCOL":"HTTP/1.1",
  "TEST":"table: 0x03606d00",
  "error":"table: 0x03462998",
  "input":"table: 0x00563ad8",
  "params":[],
  "req":{
    "GET":[],
    "POST":{"post_data":" {\"key\":\"My Key\",\"name\":\"My Name\",\"description\":\"The description\",\"state\":1} "},
    "app_path":"",
    "cookies":[],
    "doc_root":"",
    "env":"table: 0x034ee8b0",
    "method":"POST",
    "params":[],
    "parse_post":"function: 0x0327e3b8",
    "path_info":"/",
    "query_string":"",
    "script_name":"/cgi/test.lua"
  }
}

So it works fine.

This really should be the best way to achieve what you need, without the delays involved in executing an external process.

1 Like
#17

Strange, I had the end on there, just missed it when i copied it.

I have just tried it again and the code fails to run on my veraplus.

I did find some code here POST request for PushBullet - General Dev Discussions - Ezlo Community that i managed to get to work with minor edits

#18

Worth checking that Lua code is not disabled as a security feature. Also, for further diagnostics look at the return values from the request call.

Or maybe you’re happy with what you’ve got.

#19

went with this in the end as i wanted to use https

local https = require "ssl.https"
local http = require "socket.http"
local ltn12 = require "ltn12"
local json = require "dkjson"
local payload = {{"test", "test", null, 0}} 

local request_body = { secret = "asecret", to = "test0@gmail.com", device = null, priority = "high", payload = payload }
local response_body = {}
request_body = json.encode(request_body)

local r, c, h, s = https.request {
  url = 'https://llamalab.com/automate/cloud/message',
  method = 'POST',
  headers = {
    ["Content-Type"] = "application/json",
    ["Content-Length"] = string.len(request_body)
  },
  source = ltn12.source.string(request_body),
  sink = ltn12.sink.table(response_body)
}

akbooer it was the secrity setting run unsafe lua. Strange how one script worked with setting unchecked, but other didn’t.

1 Like
#20

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