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:com.android.projectz.teamrocket.thebusapp.activities.SplashScreenActivity.java

/**
 * permette di capire se il server esterno  attualmente disponibile oppure  offline
 *
 * @return boolean che identifica se il server  online o offline
 */// w w  w  .  j  av a  2 s  .  c o m
private boolean checkConnectionToServer() {
    if (android.os.Build.VERSION.SDK_INT > 9) { //questo per i permessi OBBLIGATORIO
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
    }
    URL url = null;
    HttpURLConnection urlConnection = null;
    try {
        url = new URL(SharedPreferencesUtils.getWebsiteUrl(this) + "/app/altra_prova.php");
        urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.connect();
        if (urlConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
            urlConnection.disconnect();
            return true;
        }
        return false;
    } catch (IOException e) {
        e.printStackTrace();
        if (!SharedPreferencesUtils.getWebsiteUrl(this).equals("http://thebusapp.orgfree.com")) {
            urlConnection.disconnect();
            SharedPreferencesUtils.setWebsiteUrl(this, "http://thebusapp.orgfree.com");
            checkConnectionToServer();
        }
        return false;
    }
}

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From source file:org.sufficientlysecure.keychain.keyimport.HkpKeyServer.java

private String query(String request) throws QueryException, HttpError {
    InetAddress ips[];//from w w  w .j a  v  a  2 s  .  c  o m
    try {
        ips = InetAddress.getAllByName(mHost);
    } catch (UnknownHostException e) {
        throw new QueryException(e.toString());
    }
    for (int i = 0; i < ips.length; ++i) {
        try {
            String url = "http://" + ips[i].getHostAddress() + ":" + mPort + request;
            Log.d(Constants.TAG, "hkp keyserver query: " + url);
            URL realUrl = new URL(url);
            HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
            conn.setConnectTimeout(5000);
            conn.setReadTimeout(25000);
            conn.connect();
            int response = conn.getResponseCode();
            if (response >= 200 && response < 300) {
                return readAll(conn.getInputStream(), conn.getContentEncoding());
            } else {
                String data = readAll(conn.getErrorStream(), conn.getContentEncoding());
                throw new HttpError(response, data);
            }
        } catch (MalformedURLException e) {
            // nothing to do, try next IP
        } catch (IOException e) {
            // nothing to do, try next IP
        }
    }

    throw new QueryException("querying server(s) for '" + mHost + "' failed");
}

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From source file:at.florian_lentsch.expirysync.net.JsonCaller.java

/**
 * Calls a server path and returns a json object with the server's response
 * @param path the url to call// w w  w . j  a v a  2 s .  c  o  m
 * @param method either {@code "GET"} or {@code "POST"}
 * @param params parameters to send to the server
 * @return the server's response
 * @throws MalformedURLException if the url is invalid
 * @throws IOException something went wrong while talking to the server
 * @throws ProtocolException if an invalid {@code method} has been passed
 * @throws JSONException invalid response received from the server
 */
public JSONObject performJsonCall(String path, String method, JSONObject params)
        throws MalformedURLException, IOException, ProtocolException, JSONException {

    String getParams = "";
    if (params != null && method == METHOD_GET) {
        getParams = jsonToGetParams(params);
    }

    URL url = new URL(this.host.toString() + path + getParams);
    boolean outputAvailable = (params != null && method != METHOD_GET);

    //connect to the server:
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    prepareConnection(connection, method, outputAvailable);
    connection.addRequestProperty("Accept-Language", Locale.getDefault().getLanguage());
    connection.connect();

    // write out:
    if (outputAvailable) { // in case there are params and this is a POST request:
        writeParams(connection, params);
    }

    // read:
    determineTimeSkew(connection);
    storeCookies(connection);
    JSONObject obj = readJSON(connection);

    return obj;
}

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From source file:com.google.android.apps.santatracker.service.RemoteApiProcessor.java

/**
 * Downloads the given URL and return/* w w  w  .j  ava  2 s  .  c o  m*/
 */
protected String downloadUrl(String myurl) throws IOException {
    InputStream is = null;
    // Only display the first 500 characters of the retrieved
    // web page content.
    // int len = 500;

    try {
        URL url = new URL(myurl);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(10000);
        conn.setConnectTimeout(15000);
        conn.setRequestMethod("GET");
        conn.setDoInput(true);
        // Starts the query
        conn.connect();
        int response = conn.getResponseCode();
        if (!isValidHeader(conn)) {
            // not a valid header
            Log.d(TAG, "Santa communication failure.");
            return null;

        } else if (response != 200) {
            Log.d(TAG, "Santa communication failure " + response);
            return null;

        } else {
            is = conn.getInputStream();

            // Convert the InputStream into a string
            return read(is).toString();
        }

        // Makes sure that the InputStream is closed
    } finally {
        if (is != null) {
            is.close();
        }
    }
}

---

From source file:com.intravel.Facebook.Util.java

/**
 * Connect to an HTTP URL and return the response as a string.
 *
 * Note that the HTTP method override is used on non-GET requests. (i.e.
 * requests are made as "POST" with method specified in the body).
 *
 * @param url - the resource to open: must be a welformed URL
 * @param method - the HTTP method to use ("GET", "POST", etc.)
 * @param params - the query parameter for the URL (e.g. access_token=foo)
 * @return the URL contents as a String//  www. j a  v  a2 s  . c o  m
 * @throws MalformedURLException - if the URL format is invalid
 * @throws IOException - if a network problem occurs
 */
public static String openUrl(String url, String method, Bundle params)
        throws MalformedURLException, IOException {
    // random string as boundary for multi-part http post
    String strBoundary = "3i2ndDfv2rTHiSisAbouNdArYfORhtTPEefj3q2f";
    String endLine = "\r\n";

    OutputStream os;

    if (method.equals("GET")) {
        url = url + "?" + encodeUrl(params);
    }
    //        else{
    //            url = url + "&" + encodeUrl(params);
    //        }
    Log.d("Facebook-Util", method + " URL: " + url);
    HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
    conn.setRequestProperty("User-Agent",
            System.getProperties().getProperty("http.agent") + " FacebookAndroidSDK");
    if (!method.equals("GET")) {
        Bundle dataparams = new Bundle();
        for (String key : params.keySet()) {
            if (params.getByteArray(key) != null) {
                dataparams.putByteArray(key, params.getByteArray(key));
            }
        }

        // use method override
        if (!params.containsKey("method")) {
            params.putString("method", method);
        }

        if (params.containsKey("access_token")) {
            String decoded_token = URLDecoder.decode(params.getString("access_token"));
            params.putString("access_token", decoded_token);
        }

        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + strBoundary);
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setRequestProperty("Connection", "Keep-Alive");
        conn.connect();
        os = new BufferedOutputStream(conn.getOutputStream());

        os.write(("--" + strBoundary + endLine).getBytes());
        os.write((encodePostBody(params, strBoundary)).getBytes());
        os.write((endLine + "--" + strBoundary + endLine).getBytes());

        if (!dataparams.isEmpty()) {

            for (String key : dataparams.keySet()) {
                os.write(("Content-Disposition: form-data; filename=\"" + key + "\"" + endLine).getBytes());
                os.write(("Content-Type: content/unknown" + endLine + endLine).getBytes());
                os.write(dataparams.getByteArray(key));
                os.write((endLine + "--" + strBoundary + endLine).getBytes());

            }
        }
        os.flush();
    }

    String response = "";
    try {
        response = read(conn.getInputStream());
    } catch (FileNotFoundException e) {
        // Error Stream contains JSON that we can parse to a FB error
        response = read(conn.getErrorStream());
    }
    return response;
}

---

From source file:org.thialfihar.android.apg.keyimport.HkpKeyserver.java

private String query(String request) throws QueryFailedException, HttpError {
    InetAddress ips[];/* w  w w.  j  ava  2s .  co m*/
    try {
        ips = InetAddress.getAllByName(mHost);
    } catch (UnknownHostException e) {
        throw new QueryFailedException(e.toString());
    }
    for (int i = 0; i < ips.length; ++i) {
        try {
            String url = "http://" + ips[i].getHostAddress() + ":" + mPort + request;
            Log.d(Constants.TAG, "hkp keyserver query: " + url);
            URL realUrl = new URL(url);
            HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
            conn.setConnectTimeout(5000);
            conn.setReadTimeout(25000);
            conn.connect();
            int response = conn.getResponseCode();
            if (response >= 200 && response < 300) {
                return readAll(conn.getInputStream(), conn.getContentEncoding());
            } else {
                String data = readAll(conn.getErrorStream(), conn.getContentEncoding());
                throw new HttpError(response, data);
            }
        } catch (MalformedURLException e) {
            // nothing to do, try next IP
        } catch (IOException e) {
            // nothing to do, try next IP
        }
    }

    throw new QueryFailedException("querying server(s) for '" + mHost + "' failed");
}

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From source file:ch.pec0ra.mobilityratecalculator.DistanceCalculator.java

private String downloadUrl(String myurl) throws IOException {
    InputStream is = null;//from w  w w .j  a v a2  s  .  c o m

    try {
        URL url = new URL(myurl);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(10000 /* milliseconds */);
        conn.setConnectTimeout(15000 /* milliseconds */);
        conn.setRequestMethod("GET");
        conn.setDoInput(true);
        // Starts the query
        conn.connect();
        conn.getResponseCode();
        is = conn.getInputStream();

        String responseAsString = CharStreams.toString(new InputStreamReader(is));
        return responseAsString;

        // Makes sure that the InputStream is closed after the app is
        // finished using it.
    } finally {
        if (is != null) {
            is.close();
        }
    }
}

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From source file:utils.httpUtil_inThread.java

/**
 * ?(?)//www  . j  ava2  s .co  m
 *
 * @return ?null?
 */
public byte[] HttpGetBitmap(String url, String cookie, int timeout_connection, int timeout_read) {
    byte[] bytes = null;
    InputStream is = null;
    try {
        //??
        if (timeout_connection <= 1000)
            timeout_connection = timeout_pic_connection;
        if (timeout_read < 1000)
            timeout_read = timeout_pic_read;

        URL bitmapURL = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) bitmapURL.openConnection();
        if (cookie != null && !cookie.equals(""))
            conn.setRequestProperty("Cookie", cookie); //cookie
        conn.setConnectTimeout(timeout_connection);
        conn.setReadTimeout(timeout_read);
        conn.setDoInput(true);
        conn.connect();

        //?
        is = conn.getInputStream();
        bytes = InputStreamUtils.InputStreamTOByte(is);
    } catch (Exception e) {
        abstract_LogUtil.e(this, "[]" + e.toString());
    } finally {
        try {
            if (is != null)
                is.close();
        } catch (Exception e) {
            abstract_LogUtil.e(this, "[InputStream]");
        }
    }
    return bytes;
}

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From source file:alluxio.worker.block.BlockWorkerClientRestApiTest.java

@Test
public void writeBlock() throws Exception {
    Map<String, String> params = new HashMap<>();
    params.put("blockId", Long.toString(BLOCK_ID));
    params.put("sessionId", Long.toString(SESSION_ID));
    params.put("offset", "0");
    params.put("length", Long.toString(INITIAL_BYTES));

    TestCase testCase = new TestCase(mHostname, mPort,
            getEndpoint(BlockWorkerClientRestServiceHandler.WRITE_BLOCK), params, HttpMethod.POST, null);

    HttpURLConnection connection = (HttpURLConnection) testCase.createURL().openConnection();
    connection.setRequestProperty("Content-Type", MediaType.APPLICATION_OCTET_STREAM);
    connection.setRequestMethod(testCase.getMethod());
    connection.setDoOutput(true);//from w ww.  ja va 2  s. c  o  m
    connection.connect();
    connection.getOutputStream().write(BYTE_BUFFER.array());
    Assert.assertEquals(testCase.getEndpoint(), Response.Status.OK.getStatusCode(),
            connection.getResponseCode());
    Assert.assertEquals("", testCase.getResponse(connection));

    // Verify that the right data was written.
    mBlockWorker.commitBlock(SESSION_ID, BLOCK_ID);
    long lockId = mBlockWorker.lockBlock(SESSION_ID, BLOCK_ID);
    String file = mBlockWorker.readBlock(SESSION_ID, BLOCK_ID, lockId);
    byte[] result = new byte[INITIAL_BYTES];
    IOUtils.readFully(new FileInputStream(file), result);
    Assert.assertArrayEquals(BYTE_BUFFER.array(), result);
}

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From source file:com.orange.oidc.tim.service.HttpOpenidConnect.java

static String getTimUserInfo(String server_url, String tim_access_token) {
    // android.os.Debug.waitForDebugger();
    // default result
    String result = null;// w w w . j a  va 2  s .  c  o m

    // check if server is valid
    if (isEmpty(server_url) || isEmpty(tim_access_token)) {
        Logd(TAG, "getTimUserInfo no server url or tim_access_token");
        return null;
    }

    if (!server_url.endsWith("/"))
        server_url += "/";

    // get user info endpoint
    String userinfo_endpoint = getEndpointFromConfigOidc("userinfo_endpoint", server_url);
    if (isEmpty(userinfo_endpoint)) {
        Logd(TAG, "getTimUserInfo : could not get endpoint on server : " + server_url);
        return null;
    }

    // build connection
    HttpURLConnection huc = getHUC(userinfo_endpoint);
    huc.setInstanceFollowRedirects(false);
    huc.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

    huc.setRequestProperty("Authorization", "Bearer " + tim_access_token);
    Logd("getTimUserInfo", "bearer: " + tim_access_token);

    try {
        // try to establish connection 
        huc.connect();
        // get result
        int responseCode = huc.getResponseCode();
        Logd(TAG, "getTimUserInfo 2 response: " + responseCode);

        // if 200, read http body
        if (responseCode == 200) {
            InputStream is = huc.getInputStream();
            result = convertStreamToString(is);
            is.close();
            Logd(TAG, "getTimUserInfo 2 result: " + result);
        } else {
            // result = "response code: "+responseCode;
        }

        // close connection
        huc.disconnect();

    } catch (Exception e) {
        Log.e(TAG, "getTimUserInfo FAILED");
        e.printStackTrace();
    }

    return result;
}

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