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HTTPSUrlConnection - How to see headers sent on Microsoft Windows

I've this code in Java 8
String u = "https://tes.com/Prova.asmx?WSDL";
URL url = new URL(u);
System.out.println("Link: " + u);
SSLContext sc = SSLContext.getInstance("TLSv1");
sc.init(null, null, new java.security.SecureRandom());
HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
con.setSSLSocketFactory(sc.getSocketFactory());
System.out.println("After url connection");
//con.setRequestProperty("Accept","*/*");
//con.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11");
//con.connect();
BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(), Charset.forName("UTF-8")));
String input;
while ((input = br.readLine()) != null) {
System.out.println(input);
}
br.close();
How can i see header that are sent on connection using Microsoft Windows?
Thanks

Java - Read page source from url returns unknown characters

I am using the code below to read a page source from url (https://www.amazon.com) with "UTF-8" charset in NetBeans, but it returns unknown characters (the attached image). I don't have any idea that what is the problem and would be gratefull if help me to modify the code to work properly? Thanks.
public static String getURLSource(String url) throws IOException
{
URL urlObject = new URL(url);
URLConnection urlConnection = urlObject.openConnection();
urlConnection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11");
return toString(urlConnection.getInputStream());
}
private static String toString(InputStream inputStream) throws IOException
{
try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8")))
{
String inputLine;
StringBuilder stringBuilder = new StringBuilder();
while ((inputLine = bufferedReader.readLine()) != null)
{
stringBuilder.append(inputLine);
}
return stringBuilder.toString();
}
}

Use HttpsUrlConnection instead of UrlConnection. See a similar question.

You just need to unzip your content. Here is the code that worked for me
HttpClient httpClient = new HttpClient();
try {
httpClient.setConnectionUrl("https://www.amazon.com");
ByteBuffer buff = httpClient.setRequestHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11")
.sendHttpRequestForBinaryResponse(HttpClient.HttpMethod.GET);
try (
ByteArrayInputStream bais = new ByteArrayInputStream(buff.array());
GZIPInputStream gzis = new GZIPInputStream(bais);
InputStreamReader isr = new InputStreamReader(gzis);
BufferedReader br = new BufferedReader(isr)
) {
br.lines().forEach(line -> System.out.println(line));
}
} catch (Exception e) {
System.out.println(httpClient.getLastResponseCode() + " "
+ httpClient.getLastResponseMessage() + TextUtils.getStacktrace(e, false));
}
Just few clarifications: In this example I use a 3d party Http client class HttpClient (And also class TextUtils). They both come from Open source MgntUtils library writen and maintained by me. But you don't have to use it. The main part is - read the info from the InputStream as binary info (as byte array or ByteBuffer) and than and unzip it with GZIPInputStream like in my example.
If you do want to use MgntUtils library you can get it As maven artifact or from Github (including source code and Javadoc). and here is Javadoc online

How does HTTP POST method transfer data ?

I know what is the HTTP header and how the HTTP data format , I also know how to make a HTTP post from Java ,
like
StringBuffer result = new StringBuffer();
PrintWriter out = null;
BufferedReader in = null;
StringBuffer result = new StringBuffer();
try {
URL realUrl = new URL("http://somesite/somepage.htm");
URLConnection conn = realUrl.openConnection();
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
conn.setDoOutput(true);
conn.setDoInput(true);
out = new PrintWriter(conn.getOutputStream());
out.print(param);
out.flush();
in = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result.append(line);
}
} catch (Exception e) {
e.printStackTrace();
}
I can use some code like this write stream to web server , and read stream also .
Here is my question .
What is the HTTP POST method really do , I mean how does the client communicate to web server ?
What will happen if the web server only read the HTTP POST header and don't read the stream from client ?
Does the stream will stuck in somewhere ?
Thanks .

Java HttpURLConnection trying to login with cookie

So am trying to login this website using java but for some reason its not working as expected i got the host and all that stuff but its not going to the account page with the cookie it still shows the login page and yes my account info is correct any help is great
public static void main(String[] args) {
try {
String params = "loginEmail=private#hotmail.com&loginPassword=privatepassword&Submit=Sign+In";
String urls = "http://www.filefactory.com/member/signin.php";
URL url = new URL(urls);
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
connection.setRequestProperty("Host", "www.filefactory.com");
connection.setRequestProperty("Referer", "http://www.filefactory.com/member/signin.php");
connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.101 Safari/537.36 OPR/25.0.1614.50");
connection.setRequestProperty("Content-Length", "" +
Integer.toString(params.getBytes().length));
connection.setRequestProperty("Content-Language", "en-US");
connection.setDoInput(true);
connection.setDoOutput(true);
//Send request
DataOutputStream wr = new DataOutputStream (
connection.getOutputStream ());
wr.writeBytes (params);
wr.flush ();
wr.close ();
//Get Response
InputStream is = connection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
String line;
StringBuilder response = new StringBuilder();
while((line = rd.readLine()) != null) {
response.append(line);
response.append('\r');
}
rd.close();
System.out.println(response.toString());
// get the cookie if need, for login
String cookies = connection.getHeaderField("Set-Cookie");
// open the new connnection again
connection = (HttpURLConnection) new URL("http://www.filefactory.com/account/").openConnection();
connection.setRequestProperty("Cookie", cookies);
connection.addRequestProperty("Accept-Language", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");
connection.addRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.101 Safari/537.36 OPR/25.0.1614.50");
connection.addRequestProperty("Host", "www.filefactory.com");
System.out.println("Redirect to URL : " + "http://www.filefactory.com/account/");
BufferedReader in = new BufferedReader(
new InputStreamReader(connection.getInputStream()));
String inputLine;
StringBuilder html = new StringBuilder();
while ((inputLine = in.readLine()) != null) {
html.append(inputLine);
}
in.close();
System.out.println("URL Content... \n" + html.toString());
System.out.println("Done");
} catch (Exception e) {
e.printStackTrace();
}
}
}

You are using : String cookies = connection.getHeaderField("Set-Cookie");
Are you sure there is only one entry for that header? There could be more.
http://en.wikipedia.org/wiki/HTTP_cookie
Try using chrome or firefox and try logging in manually to capture the request and response. That may give you some hints regarding what could be wrong.
Additionally you could use a tool to view the communication between your client and the server (unless you are already doing so)

It's hard to tell, not knowing the exact way that website works, but you should note that it sends you the cookies first when it presents the login page to you. When you send in your credentials you have to already send them together with the cookies, so that it knows to associate those credentials with this cookie.

403 Forbidden with Java but not web browser?

I am writing a small Java program to get the amount of results for a given Google search term. For some reason, in Java I am getting a 403 Forbidden but I am getting the right results in web browsers. Code:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
public class DataGetter {
public static void main(String[] args) throws IOException {
getResultAmount("test");
}
private static int getResultAmount(String query) throws IOException {
BufferedReader r = new BufferedReader(new InputStreamReader(new URL("https://www.google.com/search?q=" + query).openConnection()
.getInputStream()));
String line;
String src = "";
while ((line = r.readLine()) != null) {
src += line;
}
System.out.println(src);
return 1;
}
}
And the error:
Exception in thread "main" java.io.IOException: Server returned HTTP response code: 403 for URL: https://www.google.com/search?q=test
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
at DataGetter.getResultAmount(DataGetter.java:15)
at DataGetter.main(DataGetter.java:10)
Why is it doing this?

You just need to set user agent header for it to work:
URLConnection connection = new URL("https://www.google.com/search?q=" + query).openConnection();
connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11");
connection.connect();
BufferedReader r = new BufferedReader(new InputStreamReader(connection.getInputStream(), Charset.forName("UTF-8")));
StringBuilder sb = new StringBuilder();
String line;
while ((line = r.readLine()) != null) {
sb.append(line);
}
System.out.println(sb.toString());
The SSL was transparently handled for you as could be seen from your exception stacktrace.
Getting the result amount is not really this simple though, after this you have to fake that you're a browser by fetching the cookie and parsing the redirect token link.
String cookie = connection.getHeaderField( "Set-Cookie").split(";")[0];
Pattern pattern = Pattern.compile("content=\\\"0;url=(.*?)\\\"");
Matcher m = pattern.matcher(response);
if( m.find() ) {
String url = m.group(1);
connection = new URL(url).openConnection();
connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11");
connection.setRequestProperty("Cookie", cookie );
connection.connect();
r = new BufferedReader(new InputStreamReader(connection.getInputStream(), Charset.forName("UTF-8")));
sb = new StringBuilder();
while ((line = r.readLine()) != null) {
sb.append(line);
}
response = sb.toString();
pattern = Pattern.compile("<div id=\"resultStats\">About ([0-9,]+) results</div>");
m = pattern.matcher(response);
if( m.find() ) {
long amount = Long.parseLong(m.group(1).replaceAll(",", ""));
return amount;
}
}
Running the full code I get 2930000000L as a result.

For me it worked by adding the header:
"Accept": "*/*"

You probably aren't setting the correct headers. Use LiveHttpHeaders (or equivalent) in the browser to see what headers the browser is sending, then emulate them in your code.

It's because the site uses SSL. Try using the Jersey HTTP Client. You will probably also have to learn a little about HTTPS and the certificates, but I think Jersey can bet set to ignore most of the details relating to the actual security.