Adaptavist ScriptRunner - How to escape html?

[Mark Lonergan]

Does anybody know the syntax to escape special html characters in ScriptRunner?

I have user input in the form of "H&S" and the ampersand is killing my REST call so I need to escape it.

I can only find Java examples and it looks like the libraries are not available in ScriptRunner

If I have an "&" in the pageBody the post fails.

// Create a new page
def pageResp = post("/wiki/rest/api/content")
 .basicAuth(APIUSERNAME, APIPASSWORD)
 .header('Content-Type', 'application/json')
 .body([ 
 type: "page",
 title: pageTitle,
 space: [
 key: pageSpace // set the space key 
 ],
 // Add page under a parent
 ancestors: [
 [
 type: "page",
 id: parentPage, // Parent page
 ]
 ],
 body: [
 storage: [
 value: pageBody,
 representation: "storage"
 ]
 ],
 metadata:[
 labels: [
 [name:"hazard-investigations"],
 [name:"uncontrolled"]
 ]
 ]
 ])
 .asObject(Map)

Thanks in advance.