REST API communication through LUA code

Solar2D General Questions/Discussion
#1

Hi, so I’m experimenting on Parse’s REST API. According to the documentation, this GET method will retrieve data from the specified class. By the way, develephant has a library for Parse and it’s awesome, thank you for that develephant. I just want to learn this.

curl -X GET \ -H "X-Parse-Application-Id: ParseAppID" \ -H "X-Parse-REST-API-Key: RESTAPIKey" \ https://api.parse.com/1/classes/GameScore

I have successfully coded this with LUA and it works fine. This is my LUA code translation to the code above.

local headers = {} headers["Content-Type"] = "application/json" headers["X-Parse-Application-Id"] = ParseAppID headers["X-Parse-REST-API-Key"] = RESTAPIKey local body = "" local params = {} params.headers = headers params.body = body network.request("https://api.parse.com/1/classes/GameScore", "GET", networkListener, params)

Now I want to query data with specific conditions. Parse’s documentation has this GET method.

curl -X GET \ -H "X-Parse-Application-Id: ParseAppID" \ -H "X-Parse-REST-API-Key: RESTAPIKey" \ -G \ --data-urlencode 'where={"playerName":"Sean Plott","cheatMode":false}' \ https://api.parse.com/1/classes/GameScore

How do I translate this to LUA code? I have this code so far but it does not work. This is really a noob question. I am sorry for this. What does -G and --data mean? -H stands for Headers if I’m not mistaken.

local headers = {} headers["Content-Type"] = "application/json" headers["X-Parse-Application-Id"] = ParseAppID headers["X-Parse-REST-API-Key"] = RESTAPIKey local body = urlencode("where={playerName:Sean Plott,cheatMode:false}") local params = {} params.headers = headers params.body = body network.request("https://api.parse.com/1/classes/GameScore", "GET", networkListener, params)

I’d appreciate some guidance on this one, even just a bit :slight_smile: Thank you very much.

#2

To whoever wanting to know the answer, I got it. I just changed the URL to

https://api.parse.com/1/classes/GameScore?where%3D%7B%22playerName%22%3A%22Sean%20Plott%22%2C%22cheatMode%22%3Afalse%7D

This is working now.

#3 
function urlencode( str )     if (str) then         str = string.gsub (str, "\n", "\r\n")         str = string.gsub (str, "([^%w])",             function (c) return string.format ("%%%02X", string.byte(c)) end)         str = string.gsub (str, " ", "+")     end     return str     end

This is a basic URL encoding function in Lua.  You technically don’t need to encode the where= part, just the code after it. You could have done:

local body = “where=” … urlencode("{playerName:Sean Plott,cheatMode:false}")

You will find this a little more useful when you have to start substituting strings for the playerName and cheatMode values.

Rob

#4

Hi Sir, yeah, actually I did what you just posted but then I thought I’d give the exact string that should be submitted. Anyhow, thank you for this. Your tutorials are always top-notch everybody can understand. Thank you.

#5

To whoever wanting to know the answer, I got it. I just changed the URL to

https://api.parse.com/1/classes/GameScore?where%3D%7B%22playerName%22%3A%22Sean%20Plott%22%2C%22cheatMode%22%3Afalse%7D

This is working now.

#6 
function urlencode( str )     if (str) then         str = string.gsub (str, "\n", "\r\n")         str = string.gsub (str, "([^%w])",             function (c) return string.format ("%%%02X", string.byte(c)) end)         str = string.gsub (str, " ", "+")     end     return str     end

This is a basic URL encoding function in Lua.  You technically don’t need to encode the where= part, just the code after it. You could have done:

local body = “where=” … urlencode("{playerName:Sean Plott,cheatMode:false}")

You will find this a little more useful when you have to start substituting strings for the playerName and cheatMode values.

Rob

#7

Hi Sir, yeah, actually I did what you just posted but then I thought I’d give the exact string that should be submitted. Anyhow, thank you for this. Your tutorials are always top-notch everybody can understand. Thank you.