Example usage for java.net HttpURLConnection getHeaderField

Introduction

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

/**
 * On some devices we have to hack://from   w w  w  . j  a v a 2  s .c  om
 * http://developers.sun.com/mobility/reference/techart/design_guidelines/http_redirection.html
 * @return the resolved url if any. Or null if it couldn't resolve the url
 * (within the specified time) or the same url if response code is OK
 */
public static String getResolvedUrl(String urlAsString, int timeout) {
    try {
        URL url = new URL(urlAsString);
        //using proxy may increase latency
        HttpURLConnection hConn = (HttpURLConnection) url.openConnection(Proxy.NO_PROXY);
        // force no follow

        hConn.setInstanceFollowRedirects(false);
        // the program doesn't care what the content actually is !!
        // http://java.sun.com/developer/JDCTechTips/2003/tt0422.html
        hConn.setRequestMethod("HEAD");
        // default is 0 => infinity waiting
        hConn.setConnectTimeout(timeout);
        hConn.setReadTimeout(timeout);
        hConn.connect();
        int responseCode = hConn.getResponseCode();
        hConn.getInputStream().close();
        if (responseCode == HttpURLConnection.HTTP_OK)
            return urlAsString;

        String loc = hConn.getHeaderField("Location");
        if (responseCode == HttpURLConnection.HTTP_MOVED_PERM && loc != null)
            return loc.replaceAll(" ", "+");

    } catch (Exception ex) {
    }
    return "";
}

---

From source file:io.github.bonigarcia.wdm.Downloader.java

public static final synchronized void download(URL url, String version, String export, List<String> driverName)
        throws IOException {
    File targetFile = new File(getTarget(version, url));
    File binary = null;//  www .j  ava  2  s  .  c o m

    // Check if binary exists
    boolean download = !targetFile.getParentFile().exists()
            || (targetFile.getParentFile().exists() && targetFile.getParentFile().list().length == 0)
            || WdmConfig.getBoolean("wdm.override");

    if (!download) {
        // Check if existing binary is valid
        Collection<File> listFiles = FileUtils.listFiles(targetFile.getParentFile(), null, true);
        for (File file : listFiles) {
            for (String s : driverName) {
                if (file.getName().startsWith(s) && file.canExecute()) {
                    binary = file;
                    log.debug("Using binary driver previously downloaded {}", binary);
                    download = false;
                    break;
                } else {
                    download = true;
                }
            }
            if (!download) {
                break;
            }
        }
    }

    if (download) {
        log.info("Downloading {} to {}", url, targetFile);
        HttpURLConnection conn = getConnection(url);
        int responseCode = conn.getResponseCode();
        log.debug("Response HTTP {}", responseCode);
        if (responseCode == HttpURLConnection.HTTP_MOVED_TEMP
                || responseCode == HttpURLConnection.HTTP_MOVED_PERM
                || responseCode == HttpURLConnection.HTTP_SEE_OTHER) {
            // HTTP Redirect
            URL newUrl = new URL(conn.getHeaderField("Location"));
            log.debug("Redirect to {}", newUrl);
            conn = getConnection(newUrl);
        }

        FileUtils.copyInputStreamToFile(conn.getInputStream(), targetFile);

        if (!export.contains("edge")) {
            binary = extract(targetFile, export);
            targetFile.delete();
        } else {
            binary = targetFile;
        }

    }
    if (export != null) {
        BrowserManager.exportDriver(export, binary.toString());
    }

}

---

From source file:org.blockartistry.mod.DynSurround.VersionCheck.java

private static void versionCheck() {
    try {/*ww  w  . jav  a  2s . com*/

        String location = REMOTE_VERSION_FILE;
        HttpURLConnection conn = null;
        while (location != null && !location.isEmpty()) {
            URL url = new URL(location);

            if (conn != null) {
                conn.disconnect();
            }

            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestProperty("User-Agent",
                    "Mozilla/5.0 (Windows; U; Windows NT 6.0; ru; rv:1.9.0.11) Gecko/2009060215 Firefox/3.0.11 (.NET CLR 3.5.30729)");
            conn.connect();
            location = conn.getHeaderField("Coordinates");
        }

        if (conn == null) {
            throw new NullPointerException();
        }

        BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));

        String line;
        while ((line = reader.readLine()) != null) {
            String[] tokens = line.split(":");
            if (mcVersion.matches(tokens[0])) {
                currentVersion = new SoftwareVersion(tokens[1]);
                break;
            }
        }

        status = UpdateStatus.CURRENT;
        if (modVersion.compareTo(currentVersion) < 0)
            status = UpdateStatus.OUTDATED;

        conn.disconnect();
        reader.close();

    } catch (Exception e) {
        ModLog.warn("Unable to read remote version data", e);
        status = UpdateStatus.COMM_ERROR;
    }
}

---

From source file:org.blockartistry.mod.Restructured.VersionCheck.java

private static void versionCheck() {
    try {/*w  ww.j  a  va2 s. c  o m*/

        String location = REMOTE_VERSION_FILE;
        HttpURLConnection conn = null;
        while (location != null && !location.isEmpty()) {
            URL url = new URL(location);

            if (conn != null) {
                conn.disconnect();
            }

            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestProperty("User-Agent",
                    "Mozilla/5.0 (Windows; U; Windows NT 6.0; ru; rv:1.9.0.11) Gecko/2009060215 Firefox/3.0.11 (.NET CLR 3.5.30729)");
            conn.connect();
            location = conn.getHeaderField("Location");
        }

        if (conn == null) {
            throw new NullPointerException();
        }

        BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));

        String line;
        while ((line = reader.readLine()) != null) {
            String[] tokens = line.split(":");
            if (mcVersion.matches(tokens[0])) {
                currentVersion = new SoftwareVersion(tokens[1]);
                break;
            }
        }

        status = UpdateStatus.CURRENT;
        if (modVersion.compareTo(currentVersion) < 0)
            status = UpdateStatus.OUTDATED;

        conn.disconnect();
        reader.close();

    } catch (Exception e) {
        ModLog.warn("Unable to read remote version data", e);
        status = UpdateStatus.COMM_ERROR;
    }
}

---

From source file:com.google.android.apps.gutenberg.provider.SyncAdapter.java

private static String getCookie(String authToken) throws IOException {
    HttpURLConnection connection = null;
    try {//from   w  w  w  .ja  v  a 2  s  .  c  om
        connection = (HttpURLConnection) new URL(
                BuildConfig.HOST + "/_ah/login?continue=http://localhost/&auth=" + authToken).openConnection();
        connection.setInstanceFollowRedirects(false);
        connection.connect();
        if (connection.getResponseCode() != 302) {
            Log.e(TAG, "Cannot fetch the cookie: " + connection.getResponseCode());
            return null;
        }
        String cookie = connection.getHeaderField("Set-Cookie");
        if (!cookie.contains("SACSID")) {
            return null;
        }
        return cookie;
    } finally {
        if (connection != null) {
            connection.disconnect();
        }
    }
}

---

From source file:com.cloud.utils.UriUtils.java

public static Long getRemoteSize(String url) {
    Long remoteSize = (long) 0;
    HttpURLConnection httpConn = null;
    HttpsURLConnection httpsConn = null;
    try {/*from   ww  w. ja  va 2s. c  om*/
        URI uri = new URI(url);
        if (uri.getScheme().equalsIgnoreCase("http")) {
            httpConn = (HttpURLConnection) uri.toURL().openConnection();
            if (httpConn != null) {
                httpConn.setConnectTimeout(2000);
                httpConn.setReadTimeout(5000);
                String contentLength = httpConn.getHeaderField("content-length");
                if (contentLength != null) {
                    remoteSize = Long.parseLong(contentLength);
                }
                httpConn.disconnect();
            }
        } else if (uri.getScheme().equalsIgnoreCase("https")) {
            httpsConn = (HttpsURLConnection) uri.toURL().openConnection();
            if (httpsConn != null) {
                String contentLength = httpsConn.getHeaderField("content-length");
                if (contentLength != null) {
                    remoteSize = Long.parseLong(contentLength);
                }
                httpsConn.disconnect();
            }
        }
    } catch (URISyntaxException e) {
        throw new IllegalArgumentException("Invalid URL " + url);
    } catch (IOException e) {
        throw new IllegalArgumentException("Unable to establish connection with URL " + url);
    }
    return remoteSize;
}

---

From source file:Main.java

public static String executePost(String targetURL, String urlParameters) {
    try {//www  .j av a 2s.  c om
        HttpURLConnection connection = (HttpURLConnection) new URL(targetURL).openConnection();
        connection.setRequestMethod("POST");
        connection.setDoOutput(true);
        //connection.setRequestProperty("Accept-Charset", charset);
        connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        OutputStream output = null;
        try {
            output = connection.getOutputStream();
            output.write(urlParameters.getBytes());
        } finally {
            if (output != null)
                try {
                    output.flush();
                    output.close();
                } catch (IOException logOrIgnore) {
                }
        }
        InputStream response = connection.getInputStream();
        String contentType = connection.getHeaderField("Content-Type");
        String responseStr = "";
        if (true) {
            BufferedReader reader = null;
            try {
                reader = new BufferedReader(new InputStreamReader(response));
                for (String line; (line = reader.readLine()) != null;) {
                    //System.out.println(line);
                    responseStr = responseStr + line;
                    Thread.sleep(2);
                }
            } finally {
                if (reader != null)
                    try {
                        reader.close();
                    } catch (IOException logOrIgnore) {
                    }
            }
        } else {
            // It's likely binary content, use InputStream/OutputStream.
            System.out.println("Binary content");
        }
        return responseStr;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return "";
}

---

From source file:edu.hackathon.perseus.core.httpSpeedTest.java

public static String getRedirectUrl(REGION region) {
    String result = "";

    switch (region) {
    case EU://  w  w w . j  a  v a  2  s  .  co  m
        result = amazonEuDomain;
        break;
    case USA:
        result = amazonUsaDomain;
        break;
    case ASIA:
        result = amazonAsiaDomain;
        break;
    }

    System.out.println("Trying to get real IP address of " + result);
    try {
        /*
        HttpHead headRequest = new HttpHead(result);
        HttpClient client = new DefaultHttpClient();
         HttpResponse response = client.execute(headRequest);
         final int statusCode = response.getStatusLine().getStatusCode();
         if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY ||
             statusCode == HttpStatus.SC_MOVED_TEMPORARILY)
         {
             String location = response.getHeaders("Location")[0].toString();
             String redirecturl = location.replace("Location: ", "");
             result = redirecturl;
         }
        */

        URL url = new URL(result);
        HttpURLConnection httpGetCon = (HttpURLConnection) url.openConnection();
        httpGetCon.setInstanceFollowRedirects(false);
        httpGetCon.setRequestMethod("GET");
        httpGetCon.setConnectTimeout(5000); //set timeout to 5 seconds

        httpGetCon.setRequestProperty("User-Agent", USER_AGENT);

        int status = httpGetCon.getResponseCode();
        System.out.println("code: " + status);
        if (status == HttpURLConnection.HTTP_MOVED_TEMP || status == HttpURLConnection.HTTP_MOVED_PERM
                || status == HttpURLConnection.HTTP_SEE_OTHER)
            result = httpGetCon.getHeaderField("Location");

    } catch (Exception e) {
        System.out.println("Exception is fired in redirector getter. error:" + e.getMessage());
        e.printStackTrace();
    }
    System.out.println("Real IP address is " + result);
    return result;
}

---

From source file:eu.geopaparazzi.library.network.NetworkUtilities.java

/**
 * Sends an HTTP GET request to a url/*w w  w.  j a v  a2s .co m*/
 *
 * @param urlStr - The URL of the server. (Example: " http://www.yahoo.com/search")
 * @param file the output file. If it is a folder, it tries to get the file name from the header.
 * @param requestParameters - all the request parameters (Example: "param1=val1&param2=val2"). 
 *           Note: This method will add the question mark (?) to the request - 
 *           DO NOT add it yourself
 * @param user
 * @param password
 * @return the file written. 
 * @throws Exception 
 */
public static File sendGetRequest4File(String urlStr, File file, String requestParameters, String user,
        String password) throws Exception {
    if (requestParameters != null && requestParameters.length() > 0) {
        urlStr += "?" + requestParameters;
    }
    HttpURLConnection conn = makeNewConnection(urlStr);
    conn.setRequestMethod("GET");
    // conn.setDoOutput(true);
    conn.setDoInput(true);
    // conn.setChunkedStreamingMode(0);
    conn.setUseCaches(false);

    if (user != null && password != null) {
        conn.setRequestProperty("Authorization", getB64Auth(user, password));
    }
    conn.connect();

    if (file.isDirectory()) {
        // try to get the header
        String headerField = conn.getHeaderField("Content-Disposition");
        String fileName = null;
        if (headerField != null) {
            String[] split = headerField.split(";");
            for (String string : split) {
                String pattern = "filename=";
                if (string.toLowerCase().startsWith(pattern)) {
                    fileName = string.replaceFirst(pattern, "");
                    break;
                }
            }
        }
        if (fileName == null) {
            // give a name
            fileName = "FILE_" + LibraryConstants.TIMESTAMPFORMATTER.format(new Date());
        }
        file = new File(file, fileName);
    }

    InputStream in = null;
    FileOutputStream out = null;
    try {
        in = conn.getInputStream();
        out = new FileOutputStream(file);

        byte[] buffer = new byte[(int) maxBufferSize];
        int bytesRead = in.read(buffer, 0, (int) maxBufferSize);
        while (bytesRead > 0) {
            out.write(buffer, 0, bytesRead);
            bytesRead = in.read(buffer, 0, (int) maxBufferSize);
        }
        out.flush();

    } finally {
        if (in != null)
            in.close();
        if (out != null)
            out.close();
    }
    return file;
}

---

From source file:org.csware.ee.utils.Tools.java

public static String getSessionID(String path) {
    String[] sessionId = null;//from w  w w .j  a  v  a2s  . c  o  m
    try {
        // URL
        URL url = new URL(path);
        // HttpURLConnection
        HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
        String session_value = urlConn.getHeaderField("Set-Cookie");
        sessionId = session_value.split(";");
        // 
        urlConn.setConnectTimeout(5 * 1000);
        // 
        urlConn.connect();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return sessionId[0];
}

---

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