Example usage for java.net URLConnection getHeaderField

Introduction

In this page you can find the example usage for java.net URLConnection getHeaderField.

Prototype

public String getHeaderField(int n) 

Source Link

Document

Returns the value for the n ^th header field.

Usage

From source file:Main.java

public static void main(String args[]) throws Exception {
    URL url = new URL("http://www.google.com");
    URLConnection httpCon = (URLConnection) url.openConnection();

    String s = httpCon.getHeaderField("Set-Cookie");
    System.out.println(s);//from  ww w.  jav  a2  s  .c o m

}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    URL url = new URL("http://java2s.com");
    URLConnection conn = url.openConnection();

    for (int i = 0;; i++) {
        String headerName = conn.getHeaderFieldKey(i);
        String headerValue = conn.getHeaderField(i);
        System.out.println(headerName);
        System.out.println(headerValue);

        if (headerName == null && headerValue == null) {
            System.out.println("No more headers");
            break;
        }//from   w  w w.  j a va 2  s.  c om
    }
}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    URL url = new URL("http://hostname:80");
    URLConnection conn = url.openConnection();

    for (int i = 0;; i++) {
        String headerName = conn.getHeaderFieldKey(i);
        String headerValue = conn.getHeaderField(i);
        System.out.println(headerName);
        System.out.println(headerValue);

        if (headerName == null && headerValue == null) {
            System.out.println("No more headers");
            break;
        }/*from w w  w  . ja  v  a  2 s  . co  m*/
    }
}

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From source file:Main.java

public static void main(String[] args) throws Exception {
    String s;/*  www.  j a  v a  2 s. co m*/
    s = "http://www.y.com/authTest";
    URL url = new URL(s);

    URLConnection urlc = url.openConnection();

    Map<String, List<String>> hf = urlc.getHeaderFields();
    for (String key : hf.keySet())
        System.out.println(key + ": " + urlc.getHeaderField(key));

    System.out.println(((HttpURLConnection) urlc).getResponseCode());
}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    URL url = new URL("http://hostname:80");
    URLConnection conn = url.openConnection();

    for (int i = 0;; i++) {
        String headerName = conn.getHeaderFieldKey(i);
        String headerValue = conn.getHeaderField(i);

        if (headerName == null && headerValue == null) {
            break;
        }//from w w  w . j a  v  a2 s .c o  m
        if ("Set-Cookie".equalsIgnoreCase(headerName)) {
            String[] fields = headerValue.split(";\\s*");
            for (int j = 1; j < fields.length; j++) {
                if ("secure".equalsIgnoreCase(fields[j])) {
                    System.out.println("secure=true");
                } else if (fields[j].indexOf('=') > 0) {
                    String[] f = fields[j].split("=");
                    if ("expires".equalsIgnoreCase(f[0])) {
                        System.out.println("expires" + f[1]);
                    } else if ("domain".equalsIgnoreCase(f[0])) {
                        System.out.println("domain" + f[1]);
                    } else if ("path".equalsIgnoreCase(f[0])) {
                        System.out.println("path" + f[1]);
                    }
                }
            }
        }
    }
}

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From source file:MainClass.java

public static void main(String args[]) {
    URL u;/*from w  w  w  .j a  v  a 2 s.c  o  m*/
    URLConnection uc;
    String header;

    try {
        u = new URL("http://www.java2s.com");
        uc = u.openConnection();
        for (int j = 1;; j++) {
            header = uc.getHeaderField(j);
            if (header == null)
                break;
            System.out.println(uc.getHeaderFieldKey(j) + " " + header);
        }
    } catch (MalformedURLException e) {
        System.err.println("not a URL I understand.");
    } catch (IOException e) {
        System.err.println(e);
    }
}

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From source file:Main.java

public static void main(String args[]) throws Exception {
    String sessionCookie = null;/*ww  w . ja v  a 2 s.  co  m*/
    URL url = new java.net.URL("http://127.0.0.1/yourServlet");
    URLConnection con = url.openConnection();
    if (sessionCookie != null) {
        con.setRequestProperty("cookie", sessionCookie);
    }
    con.setUseCaches(false);
    con.setDoOutput(true);
    con.setDoInput(true);
    ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
    DataOutputStream out = new DataOutputStream(byteOut);
    out.flush();
    byte buf[] = byteOut.toByteArray();
    con.setRequestProperty("Content-type", "application/octet-stream");
    con.setRequestProperty("Content-length", "" + buf.length);
    DataOutputStream dataOut = new DataOutputStream(con.getOutputStream());
    dataOut.write(buf);
    dataOut.flush();
    dataOut.close();
    DataInputStream in = new DataInputStream(con.getInputStream());
    int count = in.readInt();
    in.close();
    if (sessionCookie == null) {
        String cookie = con.getHeaderField("set-cookie");
        if (cookie != null) {
            sessionCookie = parseCookie(cookie);
            System.out.println("Setting session ID=" + sessionCookie);
        }
    }

    System.out.println(count);
}

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From source file:Main.java

private static String getEncoding(URLConnection connection) {
    String contentTypeHeader = connection.getHeaderField("Content-Type");
    if (contentTypeHeader != null) {
        int charsetStart = contentTypeHeader.indexOf("charset=");
        if (charsetStart >= 0) {
            return contentTypeHeader.substring(charsetStart + "charset=".length());
        }/*from   w  w  w.  ja va  2  s.  c o m*/
    }
    return "UTF-8";
}

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From source file:utils.ConnectionUtil.java

public static String getRealFileName(URL url) throws IOException {
    String fileName;//w w  w. j av  a2  s  . c o m
    URLConnection conn = url.openConnection();
    String raw = conn.getHeaderField("Content-Disposition");
    // raw = "attachment; filename=abc.jpg"
    if (raw != null && raw.indexOf('=') != -1) {
        fileName = raw.split("=")[1]; //getting value after '='
    } else {
        // fall back to random generated file name?
        String fileNameURL = url.getFile();
        if (fileNameURL.lastIndexOf('?') != -1) {
            fileName = fileNameURL.substring(fileNameURL.lastIndexOf('/') + 1, fileNameURL.lastIndexOf('?'));
        } else {
            fileName = fileNameURL.substring(fileNameURL.lastIndexOf('/') + 1);
        }
        String contentType = conn.getHeaderField("Content-type");
        if (contentType != null && !contentType.equals("") && !contentType.equals("application/octet-stream")) {
            try {
                String type = contentType.substring(contentType.indexOf('/') + 1, contentType.indexOf(';'));
                if (type != null && !type.equals("")) {
                    fileName = FilenameUtils.getBaseName(fileName) + '.' + type;
                }
            } catch (Exception e) {
            }
        }
    }
    return fileName;
}

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From source file:Urls.java

/**
 * Returns the time when the document should be considered expired.
 * The time will be zero if the document always needs to be revalidated.
 * It will be <code>null</code> if no expiration time is specified.
 *//* w  w w .j  ava2s  .c o  m*/
public static Long getExpiration(URLConnection connection, long baseTime) {
    String cacheControl = connection.getHeaderField("Cache-Control");
    if (cacheControl != null) {
        StringTokenizer tok = new StringTokenizer(cacheControl, ",");
        while (tok.hasMoreTokens()) {
            String token = tok.nextToken().trim().toLowerCase();
            if ("must-revalidate".equals(token)) {
                return new Long(0);
            } else if (token.startsWith("max-age")) {
                int eqIdx = token.indexOf('=');
                if (eqIdx != -1) {
                    String value = token.substring(eqIdx + 1).trim();
                    int seconds;
                    try {
                        seconds = Integer.parseInt(value);
                        return new Long(baseTime + seconds * 1000);
                    } catch (NumberFormatException nfe) {
                        logger.warning("getExpiration(): Bad Cache-Control max-age value: " + value);
                        // ignore
                    }
                }
            }
        }
    }
    String expires = connection.getHeaderField("Expires");
    if (expires != null) {
        try {
            synchronized (PATTERN_RFC1123) {
                Date expDate = PATTERN_RFC1123.parse(expires);
                return new Long(expDate.getTime());
            }
        } catch (java.text.ParseException pe) {
            int seconds;
            try {
                seconds = Integer.parseInt(expires);
                return new Long(baseTime + seconds * 1000);
            } catch (NumberFormatException nfe) {
                logger.warning("getExpiration(): Bad Expires header value: " + expires);
            }
        }
    }
    return null;
}

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