Hello i'm trying to use Json from my washer with lua. It's for visualizing the samsung in Domoitcz.
A part of the Json what i get from https://api.smartthings.com/v1/devices/abcd-1234-abcd is:
"main": {
"washerJobState": {
"value": "wash"
},
"mnhw": {
"value": "1.0"
},
"data": {
"value": "{
\"payload\":{
\"x.com.samsung.da.state\":\"Run\",\"x.com.samsung.da.delayEndTime\":\"00:00:00\",\"x.com.samsung.da.remainingTime\":\"01:34:00\",\"if\":[\"oic.if.baseline\",\"oic.if.a\"],\"x.com.samsung.da.progressPercentage\":\"2\",\"x.com.samsung.da.supportedProgress\":[\"None\",\"Wash\",\"Rinse\",\"Spin\",\"Finish\"],\"x.com.samsung.da.progress\":\"Wash\",\"rt\":[\"x.com.samsung.da.operation\"]}}"
},
"washerRinseCycles": {
"value": "3"
},
"switch": {
"value": "on"
},
if i use in my script
local switch = item.json.main.switch.value
I got the valua on or off and i can use it for showing the status of the washer.
i'm trying to find out how to get the "data"value in my script, there are more items with dots en backslhases:
local remainingTime = rt.data.value.payload['x.com.samsung.da.remainingTime']
or
local remainingTime = rt.data.value['\payload']['\x.com.samsung.da.remainingTime']
i tried some more opions with 'or // , "" but always got a nill value.
Can someone explain me how to get:
\"x.com.samsung.da.remainingTime\":\"01:34:00\"
\"x.com.samsung.da.progressPercentage\":\"2\",
All the " , \, x., ar confusing me
Below is my script to test where i only left the Json log (Dzvents Lua Based) i get an error:
dzVents/generated_scripts/Samsung_v3.lua:53: attempt to index a nil value (global 'json') i don't heave any idea how te use/adjust my code for decode the string.
local json = require"json" -- the JSON library
local outer = json.decode(your_JSON_string)
local rt = outer.main
local inner = json.decode(rt.data.value)
local remainingTime = inner.payload['x.com.samsung.da.remainingTime']
local API = 'API'
local Device = 'Device'
local LOGGING = true
--Define dz Switches
local WM_STATUS = 'WM Status' --Domoitcz virtual switch ON/Off state Washer
return
{
on =
{
timer =
{
'every 1 minutes', -- just an example to trigger the request
},
httpResponses =
{
'trigger', -- must match with the callback passed to the openURL command
},
},
logging =
{
level = domoticz.LOG_DEBUG ,
},
execute = function(dz, item)
local wm_status = dz.devices(WM_STATUS)
if item.isTimer then
dz.openURL({
url = 'https://api.smartthings.com/v1/devices/'.. Device .. '/states',
headers = { ['Authorization'] = 'Bearer '.. API },
method = 'GET',
callback = 'trigger', -- see httpResponses above.
})
end
if (item.isHTTPResponse) then
if item.ok then
if (item.isJSON) then
rt = item.json.main
-- outer = json.decode'{"payload":{"x.com.samsung.da.state":"Run","x.com.samsung.da.delayEndTime":"00:00:00","x.com.samsung.da.remainingTime":"00:40:00","if":["oic.if.baseline","oic.if.a"],"x.com.samsung.da.progressPercentage":"81","x.com.samsung.da.supportedProgress":["None","Weightsensing","Wash","Rinse","Spin","Finish"],"x.com.samsung.da.progress":"Rinse","rt":["x.com.samsung.da.operation"]}}
inner = json.decode(rt.data.value)
-- local remainingTime = inner.payload['x.com.samsung.da.remainingTime']
dz.utils.dumpTable(rt) -- this will show how the table is structured
-- dz.utils.dumpTable(inner)
local washerSpinLevel = rt.washerSpinLevel.value
-- local remainingTime = inner.payload['x.com.samsung.da.remainingTime']
dz.log('Debuggg washerSpinLevel:' .. washerSpinLevel, dz.LOG_DEBUG)
dz.log('Debuggg remainingTime:' .. remainingTime, dz.LOG_DEBUG)
-- dz.log('Resterende tijd:' .. remainingTime, dz.LOG_INFO)
-- dz.log(dz.utils.fromJSON(item.data))
-- end
elseif LOGGING == true then
dz.log('There was a problem handling the request', dz.LOG_ERROR)
dz.log(item, dz.LOG_ERROR)
end
end
end
end
}
This is a weird construction: a serialized JSON inside a normal JSON.
This means you have to invoke deserialization twice:
local json = require"json" -- the JSON library
local outer = json.decode(your_JSON_string)
local rt = outer.main
local inner = json.decode(rt.data.value)
local remainingTime = inner.payload['x.com.samsung.da.remainingTime']
Related
I have 2 json api's that I am requesting; search and extended profile.
The first one gives me some search results for profiles. The search results have a "memberid" number ps['id'] for each profile found.
I want to pass and iterate those memberid's to the next json api for the extended profile information for each member. The memberid's has to be passed into the profile_params. As it is now, only 1 memberid is being passed and stored and therefore I only get the first extended profile and not all from the search.
My code is like this:
# Search for profiles
search_response = requests.post('https://api_search_for_profiles', headers=search_headers, data=search_params)
search_json = json.dumps(search_response.json(), indent=2)
search_data = json.loads(search_json)
memberid = []
for ps in (search_data['data']['content']):
memberid = str(ps['id']) # These memberid's I want to pass all found to the profile_params.
print('UserID: ' + str(ps['roomNo']))
print('MemberID: ' + str(ps['id']))
print('Username: ' + ps['nickName'])
# Extended profile info
profile_headers = {
'x-auth-token': f'{token}',
'Content-Type': 'application/x-www-form-urlencoded',
'User-Agent': 'okhttp/3.11.0',
}
profile_params = {
'id': '',
'token': f'{token}',
'memberId': f'{memberid}', # where I want each memberid from the search to go
'roomNo': ''
}
profile_response = requests.post('https://api_extended_profile_information', headers=profile_headers, data=profile_params)
profile_json = json.dumps(profile_response.json(), indent=2)
profile_data = json.loads(profile_json)
pfd = profile_data['data'] # main data
userid = str(pfd['roomNo'])
username = pfd['nickName']
gender = str(pfd['gender'])
level = str(pfd['memberLevel'])
# Here I will iterate through each profiles with the corresponding memberid and print.
The json output for search is like this, snippet:
{
"code": 0,
"data": {
"content": [
{
"id": 1359924,
"memberLevel": 1,
"nickName": "akuntesting dgt",
"roomNo": 1820031
},
{
"id": 2607179,
"memberLevel": 1,
"nickName": "testingsyth",
"roomNo": 3299390
},
# ... and so on
Assuming the post request takes only one memberid, the following is a simplified version of your code designed to handle only the issue of multiple memberids. Starting here:
memberids = []
for ps in (search_data['data']['content']):
memberid = str(ps['id'])
memberids.append(memberid)
for memberid in memberids:
profile_params = {'memberId': memberid}
profile_response = requests.post('https://api_extended_profile_information', headers=profile_headers, data=profile_params)
#the rest of your code goes here inside the loop
Try it and let me know if it works.
I encountered this bug in cjson lua when I was using a script in redis 3.2 to set a particular value in a json object.
Currently, the lua in redis does not differentiate between an empty json array or an empty json object. Which causes serious problems when serialising json objects that have arrays within them.
eval "local json_str = '{\"items\":[],\"properties\":{}}' return cjson.encode(cjson.decode(json_str))" 0
Result:
"{\"items\":{},\"properties\":{}}"
I found this solution https://github.com/mpx/lua-cjson/issues/11 but I wasn't able to implement in a redis script.
This is an unsuccessful attempt :
eval
"function cjson.mark_as_array(t)
local mt = getmetatable(t) or {}
mt.__is_cjson_array = true
return setmetatable(t, mt)
end
function cjson.is_marked_as_array(t)
local mt = getmetatable(t)
return mt and mt.__is_cjson_array end
local json_str = '{\"items\":[],\"properties\":{}}'
return cjson.encode(cjson.decode(json_str))"
0
Any help or pointer appreciated.
There are two plans.
Modify the lua-cjson source code and compile redis, click here for details.
Fix by code:
local now = redis.call("time")
-- local timestamp = tonumber(now[1]) * 1000 + math.floor(now[2]/1000)
math.randomseed(now[2])
local emptyFlag = "empty_" .. now[1] .. "_" .. now[2] .. "_" .. math.random(10000)
local emptyArrays = {}
local function emptyArray()
if cjson.as_array then
-- cjson fixed: https://github.com/xiyuan-fengyu/redis-lua-cjson-empty-table-fix
local arr = {}
setmetatable(arr, cjson.as_array)
return arr
else
-- plan 2
local arr = {}
table.insert(emptyArrays, arr)
return arr
end
end
local function toJsonStr(obj)
if #emptyArrays > 0 then
-- plan 2
for i, item in ipairs(emptyArrays) do
if #item == 0 then
-- empty array, insert a special mark
table.insert(item, 1, emptyFlag)
end
end
local jsonStr = cjson.encode(obj)
-- replace empty array
jsonStr = (string.gsub(jsonStr, '%["' .. emptyFlag .. '"]', "[]"))
for i, item in ipairs(emptyArrays) do
if item[1] == emptyFlag then
table.remove(item, 1)
end
end
return jsonStr
else
return cjson.encode(obj)
end
end
-- example
local arr = emptyArray()
local str = toJsonStr(arr)
print(str) -- "[]"
this is the json response plus "\x00" in the end from server :
{
"STATUS": [{
"STATUS":"S",
"When":1470180059,
"Code":11,
"Msg":"Summary",
"Description":"nsgminer 0.9.2"
}],"SUMMARY": [{
"Elapsed":2061,
"MHS av":0.00,
"Found Blocks":0,
"Getworks":76,
"Accepted":0,
"Rejected":0,
"Hardware Errors":0,
"Utility":0.00,
"Discarded":209,
"Stale":0,
"Get Failures":3,
"Local Work":293,
"Remote Failures":0,
"Network Blocks":14,
"Total MH":0.0000,
"Work Utility":0.00,
"Difficulty Accepted":0.00000000,
"Difficulty Rejected":0.00000000,
"Difficulty Stale":0.00000000,
"Best Share":0
}],
"id":1
}\x00
i want to use the json in lua code :
local output = stdnse.output_table()
local json_string = tostring(result:sub(1, -2))
local pos, value = json.parse(json_string)
output["Description"] = value["STATUS"][0]["Description"]
return output
when i print it out, i got null value
i solve that with covert json to string and convert string into json table
local pos, value = json.parse(tostring(json_string))
output["Description"] = value["STATUS"][1]["Description"]
So I'm trying to pull data from a JSON string (as seen below). When I decode the JSON using the code below, and then attempt to index the duration text, I get a nil return. I have tried everything and nothing seems to work.
Here is the Google Distance Matrix API JSON:
{
"destination_addresses" : [ "San Francisco, CA, USA" ],
"origin_addresses" : [ "Seattle, WA, USA" ],
"rows" : [
{
"elements" : [
{
"distance" : {
"text" : "1,299 km",
"value" : 1299026
},
"duration" : {
"text" : "12 hours 18 mins",
"value" : 44303
},
"status" : "OK"
}]
}],
"status" : "OK"
}
And here is my code:
local json = require ("json")
local http = require("socket.http")
local myNewData1 = {}
local SaveData1 = function (event)
distanceReturn = ""
distance = ""
local URL1 = "http://maps.googleapis.com/maps/api/distancematrix/json?origins=Seattle&destinations=San+Francisco&mode=driving&&sensor=false"
local response1 = http.request(URL1)
local data2 = json.decode(response1)
if response1 == nil then
native.showAlert( "Data is nill", { "OK"})
print("Error1")
distanceReturn = "Error1"
elseif data2 == nill then
distanceReturn = "Error2"
native.showAlert( "Data is nill", { "OK"})
print("Error2")
else
for i = 1, #data2 do
print("Working")
print(data2[i].rows)
for j = 1, #data2[i].rows, 1 do
print("\t" .. data2[i].rows[j])
for k = 1, #data2[i].rows[k].elements, 1 do
print("\t" .. data2[i].rows[j].elements[k])
for g = 1, #data2[i].rows[k].elements[k].duration, 1 do
print("\t" .. data2[i].rows[k].elements[k].duration[g])
for f = 1, #data2[i].rows[k].elements[k].duration[g].text, 1 do
print("\t" .. data2[i].rows[k].elements[k].duration[g].text)
distance = data2[i].rows[k].elements[k].duration[g].text
distanceReturn = data2[i].rows[k].elements[k].duration[g].text
end
end
end
end
end
end
timer.performWithDelay (100, SaveData1, 999999)
Your loops are not correct. Try this shorter solution.
Replace all your "for i = 1, #data2 do" loop for this one below:
print("Working")
for i,row in ipairs(data2.rows) do
for j,element in ipairs(row.elements) do
print(element.duration.text)
end
end
This question was solved on Corona Forums by Rob Miracle (http://forums.coronalabs.com/topic/47319-parsing-json-from-google-distance-matrix-api/?hl=print_r#entry244400). The solution is simple:
"JSON and Lua tables are almost identical data structures. In this case your table data2 has top level entries:
data2.destination_addresses
data2.origin_addresses
data2.rows
data2.status
Now data2.rows is another table that is indexed by numbers (the [] brackets) but here is only one of them, but its still an array entry:
data.rows[1]
Then inside of it is another numerically indexed table called elements.
So far to get to the element they are (again there is only one of them
data2.rows[1].elements[1]
then it's just accessing the remaining elements:
data2.rows[1].elements[1].distance.text
data2.rows[1].elements[1].distance.value
data2.rows[1].elements[1].duration.text
data2.rows[1].elements[1].duration.value
There is a great table printing function called print_r which can be found in the community code which is great for dumping tables like this to see their structure."
hi i have found a tutorial on how to use post json in lua.
here is the code :
http = require("socket.http")
crypto = require("crypto")
ltn12 = require("ltn12")
url = require("socket.url")
local json = require("json")
local commands_json =
{
["message"] = "Hello",
}
print (commands_json)
local json = {}
json.api_key = "6_192116334"
json.ver = 1
json.commands_json = json.encode(commands_json)
json.commands_hash = crypto.digest(crypto.md5, json.commands_json .. 'hkjhkjhkjh')
local post = "api=" .. url.escape(Json.Encode(json))
local response = {}
local r, c, h = http.request {
url = "http://127.0.0.1/?page=api",
method = "POST",
headers = {
["content-length"] = #post,
["Content-Type"] = "application/x-www-form-urlencoded"
},
source = ltn12.source.string(post),
sink = ltn12.sink.table(response)
}
local path = system.pathForFile("r.txt", system.DocumentsDirectory)
local file = io.open (path, "w")
file:write (Json.Encode(json) .. "\n")
file:write (post .. "\n")
file:write (response[1] .. "\n")
io.close (file)
json = Json.Decode(table.concat(response,''))
native.showAlert("hey", json.commands[1].tot_nbr_rows)
now i got these error:
Windows simulator build date: Dec 9 2011 # 14:01:29
Copyright (C) 2009-2011 A n s c a , I n c .
Version: 2.0.0
Build: 2011.704
table: 0346D6D0
Runtime error
...nistrator\my documents\corona projects\json\main.lua:17: attempt to c
all field 'encode' (a nil value)
stack traceback:
[C]: in function 'encode'
...nistrator\my documents\corona projects\json\main.lua:17: in main chun
k
Runtime error: ...nistrator\my documents\corona projects\json\main.lua:17: attem
pt to call field 'encode' (a nil value)
stack traceback:
[C]: in function 'encode'
...nistrator\my documents\corona projects\json\main.lua:17: in main chun
k
i don't know why i got the error from encode.
can anyone can help me about my case?
thanks in advance ...
This includes the Json code provided externally, likely with an encode function:
local json = require("json")
This throws away your old json variable and replaces it with an empty table:
local json = {}
And this tries to call json.encode which is now undefined since you redefined json as an empty table above:
json.commands_json = json.encode(commands_json)
The solution is to pick a different variable name.