Example usage for java.net HttpURLConnection connect

Introduction

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

Prototype

public abstract void connect() throws IOException;

Source Link

Document

Opens a communications link to the resource referenced by this URL, if such a connection has not already been established.

Usage

From source file:Main.java

/**
 * Makes HttpURLConnection and returns InputStream
 *///from  w  ww  .j a v a2  s .  c o  m
private static InputStream getHttpConnection(String urlString) throws IOException {
    InputStream stream = null;
    URL url = new URL(urlString);
    URLConnection connection = url.openConnection();

    try {
        HttpURLConnection httpConnection = (HttpURLConnection) connection;
        httpConnection.setRequestMethod("GET");
        httpConnection.connect();

        if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
            stream = httpConnection.getInputStream();
        }
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return stream;
}

From source file:dev.meng.wikidata.util.http.HttpUtils.java

public static JSONObject queryForJSONResponse(URL url, String encoding)
        throws ProtocolException, IOException, StringConvertionException {
    JSONObject response = null;//from   ww  w.ja  va  2s.c om

    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("GET");
    connection.connect();

    if (connection.getResponseCode() == 200) {
        response = new JSONObject(StringUtils.inputStreamToString(connection.getInputStream(), encoding));
    } else {
        throw new IOException("Error in opening: " + url + ", " + connection.getResponseCode() + " "
                + connection.getResponseMessage());
    }

    return response;
}

From source file:Main.java

public static InputStream getHTTPInputStream(String url) {
    try {/* w  ww  .j a  v  a  2s.c om*/
        URL urlObj = null;
        urlObj = new URL(url);

        HttpURLConnection urlConnection = null;

        urlConnection = (HttpURLConnection) urlObj.openConnection();

        urlConnection.connect();

        int response = urlConnection.getResponseCode();

        if (response != 200) {
            return null;
        }

        return urlConnection.getInputStream();
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
}

From source file:Main.java

public static byte[] downloadImage(final URL url) {
    InputStream in = null;//from w ww. ja  v a2 s. com
    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

/**
 * @param url//from w w w  . j av  a  2 s.c om
 * @return
 */
public static Bitmap getBitMapFromURL(URL url) {
    Bitmap mBitmap = null;

    try {
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setDoInput(true);
        conn.connect();
        conn.getContentLength();
        InputStream is = conn.getInputStream();
        BufferedInputStream bis = new BufferedInputStream(is);
        mBitmap = BitmapFactory.decodeStream(bis);
        bis.close();
        is.close();
    } catch (Exception e) {
        Log.e("Exception in MapScrollActivity.getBitmapFromURL", "" + e.getMessage());
        e.printStackTrace();
    }
    return mBitmap;
}

From source file:Main.java

public static Bitmap getBitmapFromURL(String urlStr) {
    Bitmap bitmap = null;//from   ww w .ja v  a2  s  . c  o  m
    try {
        URL url = new URL(urlStr);

        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.connect();

        InputStream input = connection.getInputStream();
        bitmap = BitmapFactory.decodeStream(input);
    } catch (IOException e) {
        Log.e(LOG_TAG, "cannot get the image from link :" + urlStr);
    }
    return bitmap;
}

From source file:net.ftb.data.news.RSSReader.java

public static List<NewsArticle> readRSS() {
    try {/*from   w  w  w .  j  av  a2 s . c  o m*/
        List<NewsArticle> news = Lists.newArrayList();

        DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
        URL u = new URL(Locations.feedURL);
        HttpURLConnection conn = (HttpURLConnection) u.openConnection();
        conn.connect();
        if (conn.getResponseCode() != 200) {
            Logger.logWarn("News download failed");
            AppUtils.debugConnection(conn);
            conn.disconnect();
            return null;
        }
        Document doc = builder.parse(conn.getInputStream());
        NodeList nodes = doc.getElementsByTagName("item");

        for (int i = 0; i < nodes.getLength(); i++) {
            Element element = (Element) nodes.item(i);
            NewsArticle article = new NewsArticle();
            article.setTitle(getTextValue(element, "title"));
            article.setHyperlink(getTextValue(element, "link"));
            article.setBody(getTextValue(element, "content:encoded"));
            article.setDate(getTextValue(element, "pubDate"));
            news.add(article);
        }

        return news;
    } catch (Exception ex) {
        Logger.logWarn("News download failed", ex);
        return null;
    }
}

From source file:Main.java

/**
 * download and return bitmap for the given url
 * DO not call this method from main thread
 * @param src//from  www.  ja va 2 s . co m
 * @return
 */
public static Bitmap getBitmapFromURL(String imageUrl) {
    try {
        URL url = new URL(imageUrl);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.connect();
        InputStream input = connection.getInputStream();
        Bitmap myBitmap = BitmapFactory.decodeStream(input);
        if (myBitmap != null) {
            myBitmap = getResizedBitmap(myBitmap, 200, 200);
        }
        return myBitmap;
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
}

From source file:Main.java

@Nullable
private static InputStream getStreamFromUri(Uri selectedImageURI, Context theContext) throws IOException {
    switch (selectedImageURI.getScheme()) {
    case "content":
        return theContext.getContentResolver().openInputStream(selectedImageURI);

    case "file":
        return new FileInputStream(new File(URI.create(selectedImageURI.toString())));

    case "http":
        // Fall through
    case "https":
        final URL url = new URL(selectedImageURI.toString());
        final HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);//  w w  w  .ja v  a 2  s . com
        connection.connect();
        return connection.getInputStream();

    default:
        Log.w(TAG, "getStreamFromUri(): unsupported Uri scheme: " + selectedImageURI.getScheme());
        return null;
    }
}

From source file:Main.java

public static final Bitmap fetchAndRescaleBitmap(String uri, int width, int height) throws IOException {
    URL url = new URL(uri);
    HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
    httpConnection.setDoInput(true);//from  w w  w  . j av a2  s. c o m
    httpConnection.connect();
    InputStream inputStream = httpConnection.getInputStream();
    int scaleFactor = findScaleFactor(width, height, inputStream);

    httpConnection = (HttpURLConnection) url.openConnection();
    httpConnection.setDoInput(true);
    httpConnection.connect();
    inputStream = httpConnection.getInputStream();
    Bitmap bitmap = scaleBitmap(scaleFactor, inputStream);
    return bitmap;
}