doGet() doing multiple things

Question

So, my question seems confuse at first because I can't find any direct reference about doGet() and doPost(), I can find it on specific documentations like the webApp one so I am having hard time grasping how doGet() works, that said...

function doGet(request) {
  return HtmlService.createTemplateFromFile('INTERFACE/INICIAR/AcessoHTML')
      .evaluate();
}

I am using the code above to start my webApp, I have two doubts here:

This will start the landing page of the webApp (A login page), how can I change the page after the login? (point out to another html. I know I can use createTemplateFromFile and evaluate() to generate the page itself
doGet() is used to access the params of an HTML form, right? But I am returning the html page here, from what I found I would need to return the params I get from the submitted form but I am already returning another thing and as far I know you cannot have two return in the same function nor two doGet() on the same project.

Can you imagine their use such as to provide the capability for multiple returns in a given function? If not then please look at the link that I provided in my first comment — Cooper, Apr 27 '22 at 19:07
Hi, I provided [an answer](https://stackoverflow.com/a/72039510) to this. I hope it is useful to you. — Iamblichus, Apr 28 '22 at 12:44
You cannot upvote but you can accept it. Just click the checkmark icon below the vote buttons https://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work — Iamblichus, Apr 29 '22 at 08:15

score 0 · Answer 1 · answered Apr 28 '22 at 07:17

Multiple pages:

You can query the webapp URL with certain request parameters, for example:

const url = ScriptApp.getService().getUrl();
const paramUrl = `${url}?path=afterLogin`;

Now accessing this paramUrl will fire the doGet function, and the request parameters (path=afterLogin) will be accessible through the doGet function argument.

Here's a very simple example:

function doGet(e) {
  if (e.parameter["path"] === "afterLogin") {
    return HtmlService.createTemplateFromFile('AFTER_LOGIN_HTML_FILE').evaluate();
  } else {
    return HtmlService.createTemplateFromFile('INTERFACE/INICIAR/AcessoHTML').evaluate();
  }
}

Reference:

Request parameters

doGet() doing multiple things

1 Answers1

Multiple pages:

Reference: