topic Re: RegEx Match Help in Dashboards & Visualizations

RegEx Match Help

zacksoft_wf — Mon, 08 Nov 2021 12:20:33 GMT

I have a javascript that I will be invoking from a dashboard to perform validation on a field input of user input, such that the field shouldn't contain any doublequotes OR shouldn't contain any padded spaces in the beginning or the end of the string. Need help with the regex to match the above condition.

The script looks like this ,

<form script="field_validation.js">
<label>Url Validation</label>
<fieldset submitButton="false">
<input type="text" token="tkn_fld" id="tkn_fld_id">
<label>URL</label>
</input>
</fieldset>
</form>
====================================

field_validation.js

require([
'underscore',
'splunkjs/mvc',
'jquery',
"splunkjs/mvc/simplexml/ready!"
], function(_, mvc, $) {
var tkn_url = splunkjs.mvc.Components.getInstance("tkn_fld_id");
tkn_fld.on("change", function(e) {
console.log(e)
// e.preventDefault();
if (!isUrlValid(e)) {
alert("Enter Valid URL")
return false;
}
})

function isUrlValid(userInput) {
console.log(userInput)
var res = userInput.match( NEED HELP TO WRITE THE REGEX HERE );
if (res == null)
return false;
else
return true;
}

})

Re: RegEx Match Help

ITWhisperer — Mon, 08 Nov 2021 12:47:35 GMT

It might be easier to change your logic around and look for spaces at the beginning, spaces at the end or double quotes, and if you get a match return false.

(^\s|\"|\s$)

Re: RegEx Match Help

zacksoft_wf — Mon, 08 Nov 2021 12:54:14 GMT

@ITWhisperer Thank you.
By changing the logic, do you mean something like this.. ?

======
function isFieldValid(userInput) {
console.log(userInput)
var res = userInput.match(^\s|\"|\s$);
if (res == null)
return true;
else
return false;

Re: RegEx Match Help

ITWhisperer — Mon, 08 Nov 2021 13:06:38 GMT

Perhaps more like this

var res = userInput.match("(^\s|\"|\s$)")

Re: RegEx Match Help

zacksoft_wf — Mon, 08 Nov 2021 13:45:45 GMT

@ITWhisperer

Sorry for the bother, But could you have a quick glance if the logic is okay, with the added regex.Please !

===========================

require([
'underscore',
'splunkjs/mvc',
'jquery',
"splunkjs/mvc/simplexml/ready!"
], function(_, mvc, $) {
var tkn_value = splunkjs.mvc.Components.getInstance("tkn_value_id");
tkn_value.on("change", function(e) {
console.log(e)
// e.preventDefault();
if (!isValueValid(e)) {
alert("Enter Valid Value")
return false;
}
})

function isValueValid(userInput) {
console.log(userInput)
var res = userInput.match("(^\s|\"|\s$)");
if (res == null)
return true;
else
return false;
}

})

==================================

Re: RegEx Match Help

ITWhisperer — Mon, 08 Nov 2021 13:58:03 GMT

It looks right to me but bear in mind, I don't know the syntax for javascript.

Re: RegEx Match Help

zacksoft_wf — Tue, 09 Nov 2021 10:16:39 GMT

@ITWhisperer
I tested the regex,
It matches when it finds a doublequote ,
but it cannot match spaces in the beginning or end.

var res = userInput.match("(^\s|\"|\s$)");

Re: RegEx Match Help

ITWhisperer — Tue, 09 Nov 2021 10:25:41 GMT

Try like this

var res = userInput.match(/(^\s|\"|\s$)/g)

Re: RegEx Match Help

zacksoft_wf — Tue, 09 Nov 2021 10:35:57 GMT

Thank you so much.