File Download from URL that required posting of URL paramter.

[Sunil Baboo]

Some body please help to code on java using HTTPUrlConnection protocol to download file from URL which need posting of URL parameter.

In clear way,

Suppose there is an URL : www.xyz.com?fileid=123 under which file resides. But this url require post parameter: __EVENTTARGERT=123&__EVENTARGUMENT=&__VIEWSTATE=; then only file come up. Hence , scenario here is we need to post data in that url then only file come up which may be zip or pdf or doc.

From direct URL, i know file can be downloaded easily but from URL that require posting on information, i don't know how to do....so can some help me please.

Thankx in advance

[Bear Bibeault]

"baboo sun", please check your private messages for an important administrative matter. Thanks.

[Michael Angstadt]

POST requests store their parameters in exactly the same way that GET requests do. The only difference is that GET requests store the parameters in the URL and POST requests store the parameters in the request body.

GET
URL: http://www.example.com/index.jsp?id=123&type=jpeg+image
Body: [empty]

POST
URL: http://www.example.com/index.jsp
Body: id=123&type=jpeg+image

URL url = //...
HttpURLConnection con = (HttpURLConnection)url.openConnection();
con.setDoOutput(true); //tell it that you want to write to the request's body
con.setRequestMethod("POST"); //set the HTTP method
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); //the request body will contain parameters

//output parameters
PrintWriter out = new PrintWriter(con.getOutputStream());
out.print(URLEncoder.encode("id", "UTF-8") + "=" + URLEncoder.encode("123", "UTF-8"));
out.print("&" + URLEncoder.encode("type", "UTF-8") + "=" + URLEncoder.encode("jpeg image", "UTF-8"));
out.close();

InputStream in = con.getInputStream(); //sends the request and waits for the response

[Sunil Baboo]

SOLVED