app.py

from flask import Flask,request,render_template
import os

app=Flask(__name__)
MESSAGED={'title':'Script Server',
          'messageL':['script in "script" parameter or field of json input to /run will be run']}

@app.route('/run',methods=['GET','POST'])
def run_script():
    script=''
    # print(request.method)
    print(request)
    if request.method=='GET': 
        script=request.args.get('script')
        print('I am in get')
    elif request.method=='POST':
        print('I am in post')
        data=request.get_json()
        if 'script' in data: script=data['script']
    if script=='' or script is None: return 'INVALID'
    os.system(script+' > ./out.txt')
    with open('./out.txt','r') as f: output=f.read()
    return output

@app.route('/',methods=['GET', 'POST'])
def home():
    return render_template('home.html',messageD=MESSAGED)

if __name__=='__main__':
    app.run()