Новичок
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Сообщений: 5
Регистрация: 6.5.2007
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Подскажите в чем ошибка. Хочу написать программу для авторизации на сервере, получения и разбора ответов от сервера. | Код |
import java.io.*;
import java.net.*;
import java.util.*;
public class URLConnectionTest
{
public static void main(String[] args)
{
try
{
String urlName;
urlName = "http://*************/admin/login.uni";
URL url = new URL(urlName);
URLConnection connection = url.openConnection();
String username = "***";
String password = "***";
String input = username + ":" + password;
String encoding = base64Encode(input);
connection.setRequestProperty("Authorization", "Basic " + encoding);
connection.connect();
Map<String, List<String>> headers = connection.getHeaderFields();
for (Map.Entry<String, List<String>> entry : headers.entrySet())
{
String key = entry.getKey();
for (String value : entry.getValue())
System.out.println(key + ": " + value);
}
System.out.println("----------");
System.out.println("getContentType: " + connection.getContentType());
System.out.println("getContentLength: " + connection.getContentLength());
System.out.println("getContentEncoding: " + connection.getContentEncoding());
System.out.println("getDate: " + connection.getDate());
System.out.println("getExpiration: " + connection.getExpiration());
System.out.println("getLastModifed: " + connection.getLastModified());
System.out.println("----------");
Scanner in = new Scanner(connection.getInputStream());
// print first ten lines of contents
for (int n = 1; in.hasNextLine() && n <= 10; n++)
System.out.println(in.nextLine());
if (in.hasNextLine()) System.out.println(". . .");
}
catch (IOException e)
{
e.printStackTrace();
}
}
/**
Computes the Base64 encoding of a string
@param s a string
@return the Base 64 encoding of s
*/
public static String base64Encode(String s)
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
Base64OutputStream out = new Base64OutputStream(bOut);
try
{
out.write(s.getBytes());
out.flush();
}
catch (IOException e)
{
}
return bOut.toString();
}
}
class Base64OutputStream extends FilterOutputStream
{
public Base64OutputStream(OutputStream out)
{
super(out);
}
public void write(int c) throws IOException
{
inbuf[i] = c;
i++;
if (i == 3)
{
super.write(toBase64[(inbuf[0] & 0xFC) >> 2]);
super.write(toBase64[((inbuf[0] & 0x03) << 4) | ((inbuf[1] & 0xF0) >> 4)]);
super.write(toBase64[((inbuf[1] & 0x0F) << 2) | ((inbuf[2] & 0xC0) >> 6)]);
super.write(toBase64[inbuf[2] & 0x3F]);
col += 4;
i = 0;
if (col >= 76)
{
super.write('\n');
col = 0;
}
}
}
public void flush() throws IOException
{
if (i == 1)
{
super.write(toBase64[(inbuf[0] & 0xFC) >> 2]);
super.write(toBase64[(inbuf[0] & 0x03) << 4]);
super.write('=');
super.write('=');
}
else if (i == 2)
{
super.write(toBase64[(inbuf[0] & 0xFC) >> 2]);
super.write(toBase64[((inbuf[0] & 0x03) << 4) | ((inbuf[1] & 0xF0) >> 4)]);
super.write(toBase64[(inbuf[1] & 0x0F) << 2]);
super.write('=');
}
}
private static char[] toBase64 =
{
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
};
private int col = 0;
private int i = 0;
private int[] inbuf = new int[3];
}
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результат: | Код |
java.net.ProtocolException: Server redirected too many times (20)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:1225)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1219)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:906)
at javaapplication3.URLConnectionTest.main(URLConnectionTest.java:45)
Caused by: java.net.ProtocolException: Server redirected too many times (20)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1180)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderFields(HttpURLConnection.java:1945)
at javaapplication3.URLConnectionTest.main(URLConnectionTest.java:26)
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Авторизация на сервере 
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