Example usage for java.net HttpURLConnection connect

List of usage examples for java.net HttpURLConnection connect

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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:com.expertiseandroid.lib.sociallib.utils.Utils.java

/**
 * Sends a POST request with an attached object
 * @param url the url that should be opened
 * @param params the body parameters/*from  www .  j  av  a2  s . c  om*/
 * @param attachment the object to be attached
 * @return the response
 * @throws IOException
 */
public static String postWithAttachment(String url, Map<String, String> params, Object attachment)
        throws IOException {
    String boundary = generateBoundaryString(10);
    URL servUrl = new URL(url);
    HttpURLConnection conn = (HttpURLConnection) servUrl.openConnection();
    conn.setRequestProperty("User-Agent", System.getProperties().getProperty("http.agent") + SOCIALLIB);
    conn.setRequestMethod("POST");
    String contentType = "multipart/form-data; boundary=" + boundary;
    conn.setRequestProperty("Content-Type", contentType);

    byte[] body = generatePostBody(params, attachment, boundary);

    conn.setDoOutput(true);
    conn.connect();
    OutputStream out = conn.getOutputStream();
    out.write(body);
    InputStream is = null;
    try {
        is = conn.getInputStream();
    } catch (FileNotFoundException e) {
        is = conn.getErrorStream();
    } catch (Exception e) {
        int statusCode = conn.getResponseCode();
        Log.e("Response code", "" + statusCode);
        return conn.getResponseMessage();
    }

    BufferedReader r = new BufferedReader(new InputStreamReader(is));
    StringBuilder sb = new StringBuilder();
    String l;
    while ((l = r.readLine()) != null)
        sb.append(l).append('\n');
    out.close();
    is.close();
    if (conn != null)
        conn.disconnect();
    return sb.toString();
}

From source file:com.book.jtm.chap03.HttpClientDemo.java

public static void sendRequest(String method, String url) throws IOException {
    InputStream is = null;//from ww  w.  jav  a 2s  .  c  o m
    try {
        URL newUrl = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) newUrl.openConnection();
        // ?10
        conn.setReadTimeout(10000);
        // 15
        conn.setConnectTimeout(15000);
        // ?,GET"GET",post"POST"
        conn.setRequestMethod("GET");
        // ??
        conn.setDoInput(true);
        // ??,????
        conn.setDoOutput(true);
        // Header
        conn.setRequestProperty("Connection", "Keep-Alive");
        // ?
        List<NameValuePair> paramsList = new ArrayList<NameValuePair>();
        paramsList.add(new BasicNameValuePair("username", "mr.simple"));
        paramsList.add(new BasicNameValuePair("pwd", "mypwd"));
        writeParams(conn.getOutputStream(), paramsList);

        // ?
        conn.connect();
        is = conn.getInputStream();
        // ?
        String result = convertStreamToString(is);
        Log.i("", "###  : " + result);
    } finally {
        if (is != null) {
            is.close();
        }
    }
}

From source file:com.madgag.android.lazydrawables.gravatar.GravatarBitmapDownloader.java

private InputStream downloadStreamFor(String gravatarId) {
    Log.d(TAG, "downloadStreamFor " + gravatarId);
    try {/*from w w w. j  a v a 2s .co m*/
        URL aURL = new URL("http://www.gravatar.com/avatar/" + encode(gravatarId) + "?s=" + size + "&d=mm");
        HttpURLConnection conn = (HttpURLConnection) aURL.openConnection();
        conn.setDoInput(true);
        conn.connect();
        return conn.getInputStream();
    } catch (IOException ioe) {
        Log.e(TAG, "downloadGravatar " + gravatarId, ioe);
        throw new RuntimeException(ioe);
    }
}

From source file:at.mukprojects.giphy4j.dao.HttpRequestSender.java

private Response send(HttpURLConnection connection) throws IOException {
    connection.connect();

    if (connection.getResponseCode() != 200) {
        throw new IOException("Bad response! Code: " + connection.getResponseCode());
    }/*  w w w  . ja  va2 s .c om*/

    Map<String, String> headers = new HashMap<String, String>();
    for (String key : connection.getHeaderFields().keySet()) {
        headers.put(key, connection.getHeaderFields().get(key).get(0));
    }

    String body = null;
    InputStream inputStream = null;

    try {
        inputStream = connection.getInputStream();

        String encoding = connection.getContentEncoding();
        encoding = encoding == null ? Giphy4JConstants.ENCODING : encoding;

        body = IOUtils.toString(inputStream, encoding);
    } catch (IOException e) {
        throw new IOException(e);
    } finally {
        if (inputStream != null) {
            inputStream.close();
        }
    }

    if (body == null) {
        throw new IOException("Unparseable response body! \n {" + body + "}");
    }

    Response response = new Response(headers, body);

    return response;
}

From source file:br.eb.ime.pfc.controllers.WMSStyleImageServlet.java

/**
 * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
 * methods.//ww  w .j  a  va2s.c o  m
 *
 * @param request servlet request
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException if an I/O error occurs
 */
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    InputStream in = null;
    try {
        URL url = new URL(
                "https://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Download_font_awesome.svg/512px-Download_font_awesome.svg.png");
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.connect();
        in = conn.getInputStream();
        byte[] data = IOUtils.toByteArray(in);
        response.getOutputStream().write(data);
    } catch (Exception e) {

    } finally {
        in.close();
    }
}

From source file:com.none.tom.simplerssreader.net.FeedDownloader.java

@SuppressWarnings("ConstantConditions")
public static InputStream getInputStream(final Context context, final String feedUrl) {
    final ConnectivityManager manager = context.getSystemService(ConnectivityManager.class);
    final NetworkInfo info = manager.getActiveNetworkInfo();

    if (info == null || !info.isConnected()) {
        ErrorHandler.setErrno(ErrorHandler.ERROR_NETWORK);
        LogUtils.logError("No network connection");
        return null;
    }//from   w w w .  j  ava2 s . c  o  m

    URL url;
    try {
        url = new URL(feedUrl);
    } catch (final MalformedURLException e) {
        ErrorHandler.setErrno(ErrorHandler.ERROR_HTTP_BAD_REQUEST, e);
        return null;
    }

    final boolean[] networkPrefs = DefaultSharedPrefUtils.getNetworkPreferences(context);
    final boolean useHttpTorProxy = networkPrefs[0];
    final boolean httpsOnly = networkPrefs[1];
    final boolean followRedir = networkPrefs[2];

    for (int nrRedirects = 0;; nrRedirects++) {
        if (nrRedirects >= HTTP_NR_REDIRECTS_MAX) {
            ErrorHandler.setErrno(ErrorHandler.ERROR_HTTP_TOO_MANY_REDIRECTS);
            LogUtils.logError("Too many redirects");
            return null;
        }

        HttpURLConnection conn = null;

        try {
            if (httpsOnly && url.getProtocol().equalsIgnoreCase("http")) {
                ErrorHandler.setErrno(ErrorHandler.ERROR_HTTPS_ONLY);
                LogUtils.logError("Attempting insecure connection");
                return null;
            }

            if (useHttpTorProxy) {
                conn = (HttpURLConnection) url.openConnection(new Proxy(Proxy.Type.HTTP,
                        new InetSocketAddress(InetAddress.getByName(HTTP_PROXY_TOR_IP), HTTP_PROXY_TOR_PORT)));
            } else {
                conn = (HttpURLConnection) url.openConnection();
            }

            conn.setRequestProperty("Accept-Charset", StandardCharsets.UTF_8.name());

            conn.setConnectTimeout(HTTP_URL_DEFAULT_TIMEOUT);
            conn.setReadTimeout(HTTP_URL_DEFAULT_TIMEOUT);

            conn.connect();

            final int responseCode = conn.getResponseCode();

            switch (responseCode) {
            case HttpURLConnection.HTTP_OK:
                return getInputStream(conn.getInputStream());
            case HttpURLConnection.HTTP_MOVED_PERM:
            case HttpURLConnection.HTTP_MOVED_TEMP:
            case HttpURLConnection.HTTP_SEE_OTHER:
            case HTTP_TEMP_REDIRECT:
                if (followRedir) {
                    final String location = conn.getHeaderField("Location");
                    url = new URL(url, location);

                    if (responseCode == HttpURLConnection.HTTP_MOVED_PERM) {
                        SharedPrefUtils.updateSubscriptionUrl(context, url.toString());
                    }
                    continue;
                }
                ErrorHandler.setErrno(ErrorHandler.ERROR_HTTP_FOLLOW_REDIRECT_DENIED);
                LogUtils.logError("Couldn't follow redirect");
                return null;
            default:
                if (responseCode < 0) {
                    ErrorHandler.setErrno(ErrorHandler.ERROR_HTTP_RESPONSE);
                    LogUtils.logError("No valid HTTP response");
                    return null;
                } else if (responseCode >= 400 && responseCode <= 500) {
                    ErrorHandler.setErrno(ErrorHandler.ERROR_HTTP_CLIENT);
                } else if (responseCode >= 500 && responseCode <= 600) {
                    ErrorHandler.setErrno(ErrorHandler.ERROR_HTTP_SERVER);
                } else {
                    ErrorHandler.setErrno(ErrorHandler.ERROR_HTTP_UNHANDLED);
                }
                LogUtils.logError("Error " + responseCode + ": " + conn.getResponseMessage());
                return null;
            }
        } catch (final IOException e) {
            if ((e instanceof ConnectException && e.getMessage().equals("Network is unreachable"))
                    || e instanceof SocketTimeoutException || e instanceof UnknownHostException) {
                ErrorHandler.setErrno(ErrorHandler.ERROR_NETWORK, e);
            } else {
                ErrorHandler.setErrno(ErrorHandler.ERROR_HTTP_UNHANDLED, e);
            }
            return null;
        } finally {
            if (conn != null) {
                conn.disconnect();
            }
        }
    }
}

From source file:edu.rit.chrisbitler.ritcraft.slackintegration.rtm.RTMClient.java

/**
 * Send a slack message to a channel via the web api
 * @param text The text to send to the channel
 * @param channel The channel ID to send it to (usually the relay channel)
 *//* w ww  .  j av  a  2  s . com*/
public void sendSlackMessage(String text, String channel) {
    try {
        URL chat = new URL("https://slack.com/api/chat.postMessage?token=" + SlackIntegration.BOT_TOKEN
                + "&channel=" + channel + "&text=" + URLEncoder.encode(text, "UTF-8"));
        HttpURLConnection conn = (HttpURLConnection) chat.openConnection();
        conn.connect();
        conn.getContent();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

}

From source file:com.gson.util.HttpKit.java

/**
 * ?http?/*  w w  w  .j  a v a 2  s.  c om*/
 * @param url
 * @param method
 * @param headers
 * @return
 * @throws IOException
 */
private static HttpURLConnection initHttp(String url, String method, Map<String, String> headers)
        throws IOException {
    URL _url = new URL(url);
    HttpURLConnection http = (HttpURLConnection) _url.openConnection();
    // 
    http.setConnectTimeout(25000);
    // ? --??
    http.setReadTimeout(25000);
    http.setRequestMethod(method);
    http.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
    http.setRequestProperty("User-Agent",
            "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36");
    if (null != headers && !headers.isEmpty()) {
        for (Entry<String, String> entry : headers.entrySet()) {
            http.setRequestProperty(entry.getKey(), entry.getValue());
        }
    }
    http.setDoOutput(true);
    http.setDoInput(true);
    http.connect();
    return http;
}

From source file:com.krayzk9s.imgurholo.tools.LoadImageAsync.java

@Override
protected Bitmap doInBackground(Void... voids) {
    try {/*from ww w .  ja v a2s .  c  om*/
        URL url;
        if (imageData.getJSONObject().has(ImgurHoloActivity.IMAGE_DATA_COVER))
            url = new URL("http://imgur.com/"
                    + imageData.getJSONObject().getString(ImgurHoloActivity.IMAGE_DATA_COVER) + ".png");
        else
            url = new URL(imageData.getJSONObject().getString(ImgurHoloActivity.IMAGE_DATA_LINK));
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.connect();
        InputStream input = connection.getInputStream();
        return BitmapFactory.decodeStream(input);
    } catch (JSONException e) {
        Log.e("Error!", e.toString());
    } catch (IOException e) {
        Log.e("Error!", e.toString());
    } catch (OutOfMemoryError e) {
        Log.e("Error!", e.toString());
    }

    return null;
}

From source file:ar.com.zauber.common.image.impl.JREImageRetriver.java

/** @see ImageRetriver#retrive(URL) */
public final InputStream retrive(final URL url) throws IOException {
    Validate.notNull(url);/*from   ww  w  .j  a  v a2s.c  om*/

    final URLConnection uc = url.openConnection();
    if (uc instanceof HttpURLConnection) {
        final HttpURLConnection huc = (HttpURLConnection) uc;
        prepare(uc);
        huc.connect();
        final String contentType = huc.getContentType();
        if (contentType != null && contentType.length() > 0
                && !huc.getContentType().trim().startsWith("image/")) {

            throw new RuntimeException("la URL no parece apuntar a una imagen ");
        }
        if (huc.getContentLength() > maxBytes) {
            throw new RuntimeException("la imagen pesa ms de " + maxBytes);
        }
        final InputStream is = uc.getInputStream();
        return is;
    } else {
        throw new IllegalArgumentException("solo se soporta el protocolo " + " http");
    }
}