After a lot of googling and searching, I realized the best way to do this is to create a service call to the backend witht he url of the image whose size needs to be figured out.
This service should make a HEAD call to the server to get the content - length. And pass it along as a response.
Not all servers support HEAD calls so as a fallback make a GET call to the get the request and determine the file size from the headers.
We need to set few headers for this to work universally. One of them is user-agent.
Code for the same is :
This service should make a HEAD call to the server to get the content - length. And pass it along as a response.
Not all servers support HEAD calls so as a fallback make a GET call to the get the request and determine the file size from the headers.
We need to set few headers for this to work universally. One of them is user-agent.
Code for the same is :
private void makeRequest(@FormParam("url") String url, Mapresponse, String requestMethod) { try { HttpURLConnection urlCon = (HttpURLConnection) new URL(url).openConnection(); urlCon.setRequestMethod(requestMethod); urlCon.setRequestProperty("User-Agent","Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:21.0) Gecko/20100101 Firefox/21.0"); //urlCon.setDoOutput(true); urlCon.setDoInput(true); urlCon.setUseCaches(false); urlCon.setDefaultUseCaches(false); urlCon.setConnectTimeout(2*60*1000); // 2 minute urlCon.setReadTimeout(5*60*1000); // 5 minute if(urlCon.getResponseCode() == HttpURLConnection.HTTP_OK) { String contentLength = urlCon.getContentLengthLong()+""; String contentType = urlCon.getContentType(); response.put("content-length",contentLength); response.put("content-type",contentType); response.put("status","ok"); } else { response.put("status","nok"); } } catch (Exception e) { e.printStackTrace(); response.put("status","nok"); } }
