fetch og put

//--------------------------
// send a txt to python and append it to "messages.txt"
function sendIt(){
    var pythonAdr="storeFile.py";    
    var txt=document.getElementById("valg").value;
    var D = new Date();
    var Y="\n"+D.getDate()+":"+(D.getMonth()+1)+":"+D.getFullYear();
    var formData=new FormData();
    formData.append('date',Y);
    formData.append('content'," "+txt);
    fetch(pythonAdr, 
        {
        method: 'PUT',
        body:formData
        })
    .then(function(response){
        return response.text();
    })
   .then(function(myText) {
      console.log(myText);
   })
    .catch(function(err) {
        alert("-error- : meldingen er ikke lagret \n"+err);
    });    
}

#! /usr/bin/python2
import cgi
import sys
import random
def updateFile(fileName,option,txt):
    # option= a:append, w:write
    try:
        with open(fileName, option) as file:
            file.write(txt)
            file.close()
        return "ok"
    except:
        print 'Trouble writing to: '+fileName
        res=sys.exc_info()
        print res[1]
        return('error',res[1])
form=cgi.FieldStorage()
print 'Content-type: text/html; charset=utf-8\n'
# expect to find date and content
try:
   fileN="messages.txt"
   content=form['content'].value
   date=form['date'].value
   # keep file small, remove content
   if random.randint(1, 100) < 10:
       res=updateFile(fileN,'w',date+" : fila ble slettet")
   res=updateFile(fileN,'a',date+" : "+content)
   if res =='ok':
      print "-ok-"
   else:
      print "-error-"
except :
   print 'error'

//--------------------------
// fetch "messages.txt"
function fetchIt(){
    var adr="messages.txt";
    fetch(adr, {cache: "no-cache"})
      .then(function(response) {
         if (response.ok)
             return response.text();
         else 
             return response.status+'\n'+response.statusText;
      })
     .then(function(myText) {
         document.getElementById("messages").innerHTML=myText;
      })
}