Add query string to a Google Webapp URL - google-apps-script

Question

//htmlFileName: String
function createTemplate(htmlFileName) {
let {protocol,stdName} = getProtocolData()
let params = protocol // protocol: String, exemple 987654321
let url = 'https://script.google.com/a/macros/xxxxx.xxx.xx/s/beenchangedforsecurity/exec'
url += '?' + 'p' + '=' + params
/** **MY GOAL: url** *
* https://script.google.com/a/macros/xxxxx.xxx.xx/s/beenchangedforsecurity/exec?p=987654321
*/
let html = HtmlService.createTemplateFromFile(htmlFileName)
html.protocol = protocol
html.stdName = stdName
html.url = url
Logger.log(html.protocol)
Logger.log(html.stdName)
Logger.log(html.url)
return html.evaluate().getBlob().getDataAsString() }
ERROR:
Exception: Malformed HTML content: https://script.google.com/a/macros/xxxxx.xxx.xx/s/beenchangedforsecurity/exec?p=000002036

Answer 1

I reviwed my HTML code and made this change:
original:
<p>
<form id="btn1" action= " https://script.google.com/macros/s/blablabla/exec/?p='1234567890' " >
<button typy="submit" id="uploadButton1"> Click here to send docs (param value with singlew quotes) </button>
</form>
<p>
new code:
<p>
<a id="clickhere" class="button" href= " <?!= url ?> " >
Clique aqui para enviar os documentos
</a>
</p>
I understood that in can not send query string by GET method. #Cooper, thank you again for your tip.