error handling for server errors with Google Apps Script - google-apps-script

Question

I'm building a WebApp that creates a Google Document from a template and contains some user supplied data as well as data fetched from a 3rd party service. Since all of the Class (DriveApp, DocumentApp, etc) methods make a request to the Google server, a server glitch could cause a simple statement like var doc = DocumentApp.openById(DOC_ID); to fail, throw an error and stop the entire process dead in its tracks... without the user having any idea why everything appears to be "frozen" (unless he is savvy enough to check the console).
For that reason, would it be appropriate to wrap any/all functions using those methods in a try/catch? Something like:
function createDoc(DOC_ID) {
try {
var doc = DocumentApp.openById(DOC_ID);
DriveApp.someMethod(...);
doc.someOtherDocumentMethod();
...
} catch(e) {
handleServerError(e);
return false;
}
return doc;
}
or is there a better way to handle any errors that may be out of the developer's control?
EDIT
Here's the request I send from my HTML page...
$('form').submit(function(e) {
e.preventDefault();
var obj = $('form').serializeObject();
var gurl = 'https://script.google.com/macros/s/AKfycbzmhaub3ojPARA-B-Y2uVC2BJZPaRvbgMwMTH9pd7R9aHuAD5M/exec';
$.ajax({
url: gurl,
type : "GET",
data: obj,
dataType: 'jsonp',
success : function (data, status, xhr) {
console.log("success");
console.log(data);
},
complete : function (xhr, status) {
console.log("complete");
}
});
});