Triggering GAS function via URL - google-apps-script

Question

Very new to this, but giving it a shot. I am trying to set up an Arduino motion sensor to trigger a script. At this point, my goal is to trigger a script via URL. I found this code below that I am working through, but I continue to get this error when running/debugging.
TypeError: Cannot read property "parameter" from undefined. (line 4, file "Code")
I have been looking into e.parameter object, but have not been able to make any headway
function doGet(e) {
Logger.log(e)
var passedString,whatToReturn;
passedString = e.parameter.searchStringName;
if (passedString === 'tylog') {
whatToReturn = tylog(); //Run function One
};
return ContentService.createTextOutput(whatToReturn);
};
var mns = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Monster")
var tyl = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("tyLog")
var tyd = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("tyData")
var twl = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("twLog")
var twd = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("twData")
var tym = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("tyMaster")
var twm = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("twMaster")
var test = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("test")
var tydate = tyd.getRange('A2');
var tydur = tyd.getRange(2, 2);
// Start functions
function start() {
tyl.getRange('A1').setValue(new Date());
twl.getRange('A1').setValue(new Date());
}
//Log Typhoon ride
function tylog() {
tyl.getRange(tyl.getLastRow() + 1, 1).setValue(new Date());
}
//Log Twister ride
function twlog() {
twl.getRange(twl.getLastRow() + 1, 1).setValue(new Date());
}
//Send Data to both logs and clear
function tyclear() {
tyd.getRange('A2:H2').copyTo(tym.getRange(tym.getLastRow() + 1, 1), {contentsOnly: true});
twd.getRange('A2:H2').copyTo(twm.getRange(twm.getLastRow() + 1, 1), {contentsOnly: true});
tyl.getRange('A1:A100').clearContent();
twl.getRange('A1:A100').clearContent();
}
URL Request:
https://script.google.com/macros/s/AKfycbxC5zYevR1IhfFcUMjmIqUaQ1dKNHTm4mhmWBq_Rc9HgemJQ6Q/exec?searchStringName=tylog
I put this into a new project by itself and it still returned undefined​.
function doGet(e) {
var passedString,whatToReturn;
passedString = e.parameter.searchStringName;
if (passedString === 'functionOne') {
whatToReturn = functionOne(); //Run function One
};
return ContentService.createTextOutput(whatToReturn);
};
function functionOne() {
var something;
return ContentService.createTextOutput("Hello, world!"); }

Answer 1

I believe that your URL should be https://script.google.com/macros/s/AKfycbxC5zYevR1IhfFcUMjmIqUaQ1dKNHTm4mhmWBq_Rc9HgemJQ6Q/exec?searchStringName=functionOne
After pondering this question for a while it makes no sense to require a return from functionOne. I was getting the client server communication mixed up with the Get request process. For most Get requests the request suggests some type of response since in general we're looking for some type of content to be displayed. In this situation that may not be required since the requestor is a machine.
The use of e.parameter.paramname; just enables us to send key/value pairs from within our querystring that we can recover to redirect our server actions.

Answer 2

2020 UPD:
Upon revisiting the question, I noticed that the OP runs the doGet trigger in the context of script editor, hence the e becoming undefined (as it is only constructed when a request hits the URL with an HTTP request with GET method).
Thus, the answer to the debugging part is:
When running a trigger manually from the script editor, event object will be unavailable
The answer to the running part is as a result of an extended discussion:
When assigning a result of the function, one has to put the return statement inside the function, and the tylog function did not return anything.
Also note that any change to a Web App code, unless accessing it via /dev endpoint (i.e. via /exec endpoint), won't be available until after redeployment.
References
Web Apps guide