How to get last modified date from apk file on server

Question

im trying to get the last-modified date from an apk file on my server, the problem as soon as i try to get the header it fails somehow.

i can download the file fine with

try {
            HttpURLConnection.setFollowRedirects(false);
            HttpURLConnection con =  (HttpURLConnection) new URL(params[0]).openConnection();

            con.setRequestMethod("HEAD");
            return (con.getResponseCode() == HttpURLConnection.HTTP_OK);
        } // do some more not relevant

but as soon as i try to get the header from the server it fails

            URL obj = new URL(customURL);
            URLConnection conn = obj.openConnection();
            Map<String, List<String>> map = conn.getHeaderFields();
for (Map.Entry<String, List<String>> entry : map.entrySet()) {
                System.out.println("Key : " + entry.getKey()
                        + " ,Value : " + entry.getValue());
                Toast.makeText(getApplicationContext(),"Key: "+entry.getKey() + "Value: " + entry.getValue(),Toast.LENGTH_SHORT).show();
            }

i have tried this but also to use the already existing connecting and just use the con .. but it all fails somehow

any help would be really nice

later in the program im even getting the size of the file with. totalSize = urlConnection.getContentLength(); but i just want the modified date — Sonny Hansen, Apr 07 '16 at 09:11

score 0 · Answer 1 · answered Apr 07 '16 at 10:03

0

try this may help,

long date = con.getLastModified();

 HttpURLConnection.setFollowRedirects(false);
 HttpURLConnection con = (HttpURLConnection) new URL(fileUrl).openConnection();
 long date = con.getLastModified();

  if (date == 0)
    System.out.println("No last-modified information.");
  else
    System.out.println("Last-Modified: " + new Date(date));
return date

for reference, http://developer.android.com/reference/java/net/URLConnection.html#getLastModified%28%29

answered Apr 07 '16 at 10:03

Rakesh

142
2

added this piece of code right before my setrequestmethod.. and still my program fails and then instead returns false. and i have checked my returns headers and they do. (tested with postman) – Sonny Hansen Apr 07 '16 at 10:58

score -1 · Answer 2 · answered Apr 07 '16 at 13:05

i found out that the mistake i made was running it in an async task and then trying to see the result in a Toast.

it was running as soon as i put it into a runOnUiThread

final long date = urlConnection.getLastModified();

        runOnUiThread(new Runnable() {
            public void run() {
                Toast.makeText(getApplicationContext(),"GGG"+ date,Toast.LENGTH_SHORT).show();
            }
        });

How to get last modified date from apk file on server

2 Answers2