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

/**
 * Download the avatar image from the server.
 *
 * @param avatarUrl the URL pointing to the avatar image
 * @return a byte array with the raw JPEG avatar image
 *//*from w w w  . j  a  v a 2 s  .com*/
public static byte[] downloadAvatar(final String avatarUrl) {
    // If there is no avatar, we're done
    if (TextUtils.isEmpty(avatarUrl)) {
        return null;
    }

    try {
        Log.i(TAG, "Downloading avatar: " + avatarUrl);
        // Request the avatar image from the server, and create a bitmap
        // object from the stream we get back.
        URL url = new URL(avatarUrl);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.connect();
        try {
            final BitmapFactory.Options options = new BitmapFactory.Options();
            final Bitmap avatar = BitmapFactory.decodeStream(connection.getInputStream(), null, options);

            // Take the image we received from the server, whatever format it
            // happens to be in, and convert it to a JPEG image. Note: we're
            // not resizing the avatar - we assume that the image we get from
            // the server is a reasonable size...
            Log.i(TAG, "Converting avatar to JPEG");
            ByteArrayOutputStream convertStream = new ByteArrayOutputStream(
                    avatar.getWidth() * avatar.getHeight() * 4);
            avatar.compress(Bitmap.CompressFormat.JPEG, 95, convertStream);
            convertStream.flush();
            convertStream.close();
            // On pre-Honeycomb systems, it's important to call recycle on bitmaps
            avatar.recycle();
            return convertStream.toByteArray();
        } finally {
            connection.disconnect();
        }
    } catch (MalformedURLException muex) {
        // A bad URL - nothing we can really do about it here...
        Log.e(TAG, "Malformed avatar URL: " + avatarUrl);
    } catch (IOException ioex) {
        // If we're unable to download the avatar, it's a bummer but not the
        // end of the world. We'll try to get it next time we sync.
        Log.e(TAG, "Failed to download user avatar: " + avatarUrl);
    }
    return null;
}

From source file:edu.sdsc.solr.lemmatization.LemmatizationWriter.java

static void downloadDictionary(URL definitionUrl, File target) throws IOException {
    try (InputStream is = new GZIPInputStream(definitionUrl.openConnection().getInputStream())) {
        FileUtils.copyInputStreamToFile(is, target);
    }//w  w  w  . ja va2s. co  m
}

From source file:net.meltdowntech.steamstats.SteamGame.java

public static List<SteamGame> fetchGames(SteamUser user, boolean all) {
    List<SteamGame> games = new ArrayList<>();

    Util.printDebug("Fetching games");
    //Create query url
    String url = Steam.URL + Steam.GAME_OWNED + "?key=" + Steam.KEY + "&include_played_free_games&steamid="
            + user.getCommunityId();/*from www . j  a  v a2s.c  o m*/
    try {
        //Attempt connection and parse
        URL steam = new URL(url);
        URLConnection steamConn = steam.openConnection();
        Reader steamReader = new InputStreamReader(steamConn.getInputStream());
        JSONTokener steamTokener = new JSONTokener(steamReader);
        JSONObject data = (JSONObject) steamTokener.nextValue();
        JSONObject response = data.getJSONObject("response");
        JSONArray apps = response.getJSONArray("games");

        Util.printInfo(String.format("%d game%s allotted", apps.length(), apps.length() == 1 ? "" : "s"));
        //Parse each game
        for (int y = 0; y < apps.length(); y++) {
            JSONObject app = apps.getJSONObject(y);
            SteamGame game = all ? fetchGame(app.getInt("appid")) : new SteamGame();

            //Parse each field
            Iterator keys = app.keys();
            while (keys.hasNext()) {
                String key = (String) keys.next();
                game.values.put(key, app.get(key));
            }
            games.add(game);
        }

    } catch (MalformedURLException ex) {
        Util.printError("Invalid URL");
    } catch (IOException | JSONException ex) {
        Util.printError("Invalid data");
    } catch (Exception ex) {
        Util.printError("Generic error");
    }
    Util.printDebug("Done fetching games");
    return games;
}

From source file:com.linkedin.pinot.tools.admin.command.AbstractBaseAdminCommand.java

public static String sendPostRequest(String urlString, String payload)
        throws UnsupportedEncodingException, IOException, JSONException {
    final URL url = new URL(urlString);
    final URLConnection conn = url.openConnection();

    conn.setDoOutput(true);//from   w w w . ja  v  a2  s.c o m
    final BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(conn.getOutputStream(), "UTF-8"));

    writer.write(payload, 0, payload.length());
    writer.flush();

    final BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
    final StringBuilder sb = new StringBuilder();
    String line = null;

    while ((line = reader.readLine()) != null) {
        sb.append(line);
    }

    return sb.toString();
}

From source file:Main.java

public static String getToken(String email, String password) throws IOException {
    // Create the post data
    // Requires a field with the email and the password
    StringBuilder builder = new StringBuilder();
    builder.append("Email=").append(email);
    builder.append("&Passwd=").append(password);
    builder.append("&accountType=GOOGLE");
    builder.append("&source=markson.visuals.sitapp");
    builder.append("&service=ac2dm");

    // Setup the Http Post
    byte[] data = builder.toString().getBytes();
    URL url = new URL("https://www.google.com/accounts/ClientLogin");
    HttpURLConnection con = (HttpURLConnection) url.openConnection();
    con.setUseCaches(false);/*  w w w  . ja v  a  2  s . com*/
    con.setDoOutput(true);
    con.setRequestMethod("POST");
    con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
    con.setRequestProperty("Content-Length", Integer.toString(data.length));

    // Issue the HTTP POST request
    OutputStream output = con.getOutputStream();
    output.write(data);
    output.close();

    // Read the response
    BufferedReader reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
    String line = null;
    String auth_key = null;
    while ((line = reader.readLine()) != null) {
        if (line.startsWith("Auth=")) {
            auth_key = line.substring(5);
        }
    }

    // Finally get the authentication token
    // To something useful with it
    return auth_key;
}

From source file:Main.java

public static byte[] downloadImage(final URL url) {
    InputStream in = null;//  w w w.java 2 s.c om
    int responseCode = -1;

    try {
        final HttpURLConnection con = (HttpURLConnection) url.openConnection();
        con.setDoInput(true);
        con.connect();
        responseCode = con.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            in = con.getInputStream();
            return getByteFromInputStream(in);
        }
    } catch (final IOException e) {
        Log.e(LOG_TAG, "Failed to download image from: " + url.toString(), e);
    }
    return null;
}

From source file:Main.java

public static String uploadFile(File file, String RequestURL) {
    String BOUNDARY = UUID.randomUUID().toString();
    String PREFIX = "--", LINE_END = "\r\n";
    String CONTENT_TYPE = "multipart/form-data";

    try {//from w  w  w  .  j  a v a2  s  . com
        URL url = new URL(RequestURL);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(TIME_OUT);
        conn.setConnectTimeout(TIME_OUT);
        conn.setDoInput(true);
        conn.setDoOutput(true);
        conn.setUseCaches(false);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Charset", CHARSET);
        conn.setRequestProperty("connection", "keep-alive");
        conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);
        if (file != null) {

            OutputStream outputSteam = conn.getOutputStream();

            DataOutputStream dos = new DataOutputStream(outputSteam);
            StringBuffer sb = new StringBuffer();
            sb.append(PREFIX);
            sb.append(BOUNDARY);
            sb.append(LINE_END);

            sb.append("Content-Disposition: form-data; name=\"img\"; filename=\"" + file.getName() + "\""
                    + LINE_END);
            sb.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINE_END);
            sb.append(LINE_END);
            dos.write(sb.toString().getBytes());
            InputStream is = new FileInputStream(file);
            byte[] bytes = new byte[1024];
            int len = 0;
            while ((len = is.read(bytes)) != -1) {
                dos.write(bytes, 0, len);
            }
            is.close();
            dos.write(LINE_END.getBytes());
            byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes();
            dos.write(end_data);
            dos.flush();

            int res = conn.getResponseCode();
            Log.e(TAG, "response code:" + res);
            if (res == 200) {
                return SUCCESS;
            }
        }
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return FAILURE;
}

From source file:Main.java

public static String executeHttpsPost(String url, String data, InputStream key) {
    HttpsURLConnection localHttpsURLConnection = null;
    try {/*  w w w  .ja v a2 s .  c  o m*/
        URL localURL = new URL(url);
        localHttpsURLConnection = (HttpsURLConnection) localURL.openConnection();
        localHttpsURLConnection.setRequestMethod("POST");
        localHttpsURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

        localHttpsURLConnection.setRequestProperty("Content-Length",
                "" + Integer.toString(data.getBytes().length));
        localHttpsURLConnection.setRequestProperty("Content-Language", "en-US");

        localHttpsURLConnection.setUseCaches(false);
        localHttpsURLConnection.setDoInput(true);
        localHttpsURLConnection.setDoOutput(true);

        localHttpsURLConnection.connect();
        Certificate[] arrayOfCertificate = localHttpsURLConnection.getServerCertificates();

        byte[] arrayOfByte1 = new byte[294];
        DataInputStream localDataInputStream = new DataInputStream(key);
        localDataInputStream.readFully(arrayOfByte1);
        localDataInputStream.close();

        Certificate localCertificate = arrayOfCertificate[0];
        PublicKey localPublicKey = localCertificate.getPublicKey();
        byte[] arrayOfByte2 = localPublicKey.getEncoded();

        for (int i = 0; i < arrayOfByte2.length; i++) {
            if (arrayOfByte2[i] != arrayOfByte1[i])
                throw new RuntimeException("Public key mismatch");
        }

        DataOutputStream localDataOutputStream = new DataOutputStream(
                localHttpsURLConnection.getOutputStream());
        localDataOutputStream.writeBytes(data);
        localDataOutputStream.flush();
        localDataOutputStream.close();

        InputStream localInputStream = localHttpsURLConnection.getInputStream();
        BufferedReader localBufferedReader = new BufferedReader(new InputStreamReader(localInputStream));

        StringBuffer localStringBuffer = new StringBuffer();
        String str1;
        while ((str1 = localBufferedReader.readLine()) != null) {
            localStringBuffer.append(str1);
            localStringBuffer.append('\r');
        }
        localBufferedReader.close();

        return localStringBuffer.toString();
    } catch (Exception localException) {
        byte[] arrayOfByte1;
        localException.printStackTrace();
        return null;
    } finally {
        if (localHttpsURLConnection != null)
            localHttpsURLConnection.disconnect();
    }
}

From source file:com.cnaude.mutemanager.UUIDFetcher.java

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

From source file:Main.java

public static String customrequest(String url, HashMap<String, String> params, String method) {
    try {/* w  w w  .  j a  v a2s .co m*/

        URL postUrl = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) postUrl.openConnection();
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setConnectTimeout(5 * 1000);

        conn.setRequestMethod(method);
        conn.setUseCaches(false);
        conn.setInstanceFollowRedirects(true);
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows XP; DigExt)");

        conn.connect();
        OutputStream out = conn.getOutputStream();
        StringBuilder sb = new StringBuilder();
        if (null != params) {
            int i = params.size();
            for (Map.Entry<String, String> entry : params.entrySet()) {
                if (i == 1) {
                    sb.append(entry.getKey() + "=" + entry.getValue());
                } else {
                    sb.append(entry.getKey() + "=" + entry.getValue() + "&");
                }

                i--;
            }
        }
        String content = sb.toString();
        out.write(content.getBytes("UTF-8"));
        out.flush();
        out.close();
        InputStream inStream = conn.getInputStream();
        String result = inputStream2String(inStream);
        conn.disconnect();
        return result;
    } catch (Exception e) {
        // TODO: handle exception
    }
    return null;
}