Example usage for java.net URL openConnection

List of usage examples for java.net URL openConnection

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Introduction

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

Prototype

public URLConnection openConnection() throws java.io.IOException

Source Link

Document

Returns a java.net.URLConnection URLConnection instance that represents a connection to the remote object referred to by the URL .

Usage

From source file:Main.java

public static Bitmap decodeBitmapFromURL(String src, boolean large) {

    // If the artwork returned null, don't want to try to show artwork
    if (src.equals("null")) {
        return null;
    }/* w w  w .j a va 2 s.  c  om*/

    if (large) {
        src = src.replace("large", "t500x500");
    }

    InputStream inputStream = null;
    try {
        URL url = new URL(src);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.connect();
        inputStream = connection.getInputStream();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    if (inputStream == null) {
        return null;
    }

    // Decided not to scale because would have to recreate input stream
    /*
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeStream(inputStream, null, options);
            
    options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
            
    options.inJustDecodeBounds = false; */
    Bitmap returnBitmap = BitmapFactory.decodeStream(inputStream);
    return returnBitmap;
}

From source file:Main.java

/**
 * @param http//from   w w  w.ja v a 2 s .  c o m
 * @return extracted title of page from html.
 * @throws IOException
 */
public static String getPageTitle(String linkUrl) throws IOException {
    URL url = new URL(linkUrl);
    URLConnection conn = null;
    try {

        conn = url.openConnection();

        String type = conn.getContentType();
        if (type != null && !type.toLowerCase().contains("text/html"))
            return null; // if not html, we can't get title. Return from here.
        else {
            // read response stream
            BufferedReader bufReader = new BufferedReader(
                    new InputStreamReader(conn.getInputStream(), Charset.defaultCharset()));
            int n = 0;
            int readCount = 0;
            char[] buf = new char[1024];
            StringBuilder content = new StringBuilder();

            // read till end of file or 8 times the buffer (no need to read
            // all data, assuming we get content in first 8 reads)
            while (readCount < 8 && (n = bufReader.read(buf, 0, buf.length)) != -1) {
                content.append(buf, 0, n);
                readCount++;
            }
            bufReader.close();

            // extract the title
            Matcher matcher = HTML_TITLE_PATTERN.matcher(content);
            if (matcher.find()) {

                // replace whitespaces and HTML brackets

                return matcher.group(1).replaceAll("[\\s\\<>]+", " ").trim();
            } else
                return null;
        }
    } finally {
        //any cleanup?
    }
}

From source file:Main.java

static public String downloadFile(String downloadUrl, String fileName, String dir) throws IOException {
    URL url = new URL(downloadUrl);
    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
    urlConnection.setRequestMethod("GET");
    urlConnection.setDoOutput(true);/* w w w .java 2 s .co m*/
    urlConnection.connect();
    int code = urlConnection.getResponseCode();
    if (code > 300 || code == -1) {
        throw new IOException("Cannot read url: " + downloadUrl);
    }
    String filePath = prepareFilePath(fileName, dir);
    String tmpFilePath = prepareTmpFilePath(fileName, dir);
    FileOutputStream fileOutput = new FileOutputStream(tmpFilePath);
    BufferedInputStream inputStream = new BufferedInputStream(urlConnection.getInputStream());
    byte[] buffer = new byte[1024];
    int bufferLength;
    while ((bufferLength = inputStream.read(buffer)) > 0) {
        fileOutput.write(buffer, 0, bufferLength);
    }
    fileOutput.close();
    // move tmp to destination
    copyFile(new File(tmpFilePath), new File(filePath));
    return filePath;
}

From source file:Main.java

/**
 * This method checks if the Network available on the device or not.
 * /*from  w w  w .  ja va  2s. c  om*/
 * @param context
 * @return true if network available, false otherwise
 */
public static Boolean isNetworkAvailable(Context context) {
    boolean connected = false;
    final ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    final NetworkInfo netInfo = cm.getActiveNetworkInfo();
    if (netInfo != null && netInfo.isConnectedOrConnecting()) {
        connected = true;
    } else if (netInfo != null && netInfo.isConnected() && cm.getActiveNetworkInfo().isAvailable()) {
        connected = true;
    } else if (netInfo != null && netInfo.isConnected()) {
        try {
            URL url = new URL("http://www.google.com");
            HttpURLConnection urlc = (HttpURLConnection) url.openConnection();
            urlc.setConnectTimeout(3000);
            urlc.connect();
            if (urlc.getResponseCode() == 200) {
                connected = true;
            }
        } catch (MalformedURLException e1) {
            e1.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    } else if (cm != null) {
        final NetworkInfo[] netInfoAll = cm.getAllNetworkInfo();
        for (NetworkInfo ni : netInfoAll) {
            System.out.println("get network type :::" + ni.getTypeName());
            if ((ni.getTypeName().equalsIgnoreCase("WIFI") || ni.getTypeName().equalsIgnoreCase("MOBILE"))
                    && ni.isConnected() && ni.isAvailable()) {
                connected = true;
                if (connected) {
                    break;
                }
            }
        }
    }
    return connected;
}

From source file:com.francelabs.datafari.utils.SendHttpRequest.java

public static void sendGET(String url, String userAgent) throws IOException {
    URL obj = new URL(url);
    HttpURLConnection con = (HttpURLConnection) obj.openConnection();
    con.setRequestMethod("GET");
    con.setRequestProperty("User-Agent", userAgent);
    int responseCode = con.getResponseCode();
    logger.debug("GET Response Code :: " + responseCode);
    if (responseCode == HttpURLConnection.HTTP_OK) { // success
        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String inputLine;// w w w  . ja va  2  s.c  o  m
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        // print result
        logger.debug(response.toString());
    } else {
        logger.debug("GET request not worked");
    }
}

From source file:org.cytoscape.app.internal.net.server.ScreenOriginsBeforeResponseTest.java

private static HttpURLConnection connectToURL(String urlString, String method, String origin) throws Exception {
    final URL url = new URL(urlString);
    final HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod(method);
    connection.setDoOutput(true);// w  w  w.  j a  v a  2  s  .  c  o m
    if (origin != null)
        connection.setRequestProperty("Origin", origin);
    connection.setConnectTimeout(1000);
    connection.connect();
    return connection;
}

From source file:Authentication.DinserverAuth.java

public static boolean Login(String nick, String pass, Socket socket) throws IOException {
    boolean logged = false;

    JSONObject authRequest = new JSONObject();
    authRequest.put("username", nick);
    authRequest.put("auth_id", pass);

    String query = "http://127.0.0.1:5000/token";

    URL url = new URL(query);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setConnectTimeout(5000);//from  w  ww  . j ava2 s .  c  o m
    conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
    conn.setDoOutput(true);
    conn.setDoInput(true);
    conn.setRequestMethod("POST");

    OutputStream os = conn.getOutputStream();
    os.write(authRequest.toString().getBytes(Charset.forName("UTF-8")));
    os.close();
    String output = new String();
    StringBuilder sb = new StringBuilder();
    int HttpResult = conn.getResponseCode();
    if (HttpResult == HttpURLConnection.HTTP_OK) {
        output = IOUtils.toString(new InputStreamReader(conn.getInputStream(), Charset.forName("UTF-8")));
    } else {
        System.out.println(conn.getResponseMessage());
    }

    JSONObject jsonObject = new JSONObject(output);
    logged = jsonObject.getBoolean("ok");

    conn.disconnect();

    if (logged) {
        if (DinserverMaster.addUser(nick, socket)) {
            System.out.println("User " + nick + " logged in");
        } else {
            logged = false;
        }
    }
    return logged;
}

From source file:Main.java

public static String getHtml(String getUrl, int outtime, String charsetName) {
    String html = "";
    URL url;
    try {/*from  w  w  w. j a v a  2s  .  c o  m*/
        url = new URL(getUrl);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestProperty("User-Agent",
                "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; InfoPath.1; CIBA)");
        // connection.setRequestProperty("Connection", "Keep-Alive");
        // connection.setRequestProperty("Cache-Control", "no-cache");
        connection.setConnectTimeout(outtime);
        connection.connect();
        InputStream inStrm = connection.getInputStream();

        BufferedReader br = new BufferedReader(new InputStreamReader(inStrm, charsetName));
        String temp = "";

        while ((temp = br.readLine()) != null) {
            html = html + (temp + '\n');
        }
        try {
            br.close();
        } catch (Exception e) {
            // TODO: handle exception
        }
        try {
            connection.disconnect();
        } catch (Exception e) {
            // TODO: handle exception
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return html;
}

From source file:Main.java

public static byte[] getHtmlByteArray(final String url) {
    URL htmlUrl;
    InputStream inStream = null;//from w  w  w . j  av a2 s .  c  o  m
    try {
        htmlUrl = new URL(url);
        URLConnection connection = htmlUrl.openConnection();
        HttpURLConnection httpConnection = (HttpURLConnection) connection;
        int responseCode = httpConnection.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            inStream = httpConnection.getInputStream();
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    byte[] data = inputStreamToByte(inStream);
    return data;
}

From source file:me.prokopyl.commandtools.migration.UUIDFetcher.java

private static HttpURLConnection createConnection() throws IOException {
    URL url = new URL(PROFILE_URL);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("POST");
    connection.setRequestProperty("Content-Type", "application/json");
    connection.setUseCaches(false);//  w  w w  . j a v  a 2  s  .  co  m
    connection.setDoInput(true);
    connection.setDoOutput(true);
    return connection;
}