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:in.leafco.wallet.ExchangeRatesProvider.java

private static float requestDogeBtcConversion(int provider) {
    HttpURLConnection connection = null;
    Reader reader = null;//from  w  w w . jav  a2 s.  c  o  m
    URL providerUrl;
    switch (provider) {
    case 0:
        providerUrl = LEAFPOOL_URL;
        break;
    case 1:
        providerUrl = VIRCUREX_URL;
        break;
    default:
        providerUrl = LEAFPOOL_URL;
        break;
    }

    try {
        connection = (HttpURLConnection) providerUrl.openConnection();
        connection.setConnectTimeout(Constants.HTTP_TIMEOUT_MS);
        connection.setReadTimeout(Constants.HTTP_TIMEOUT_MS);
        connection.connect();

        final int responseCode = connection.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            reader = new InputStreamReader(new BufferedInputStream(connection.getInputStream(), 1024),
                    Constants.UTF_8);
            final StringBuilder content = new StringBuilder();
            Io.copy(reader, content);

            try {
                float rate;
                switch (provider) {
                case 0:
                    /*rate = Float.parseFloat(
                        json.getJSONObject("return")
                            .getJSONObject("markets")
                            .getJSONObject("LEAF")
                            .getString("lasttradeprice"));*/ //For later use.
                    rate = Float.parseFloat(content.toString());
                    break;
                case 1:
                    final JSONObject json = new JSONObject(content.toString());
                    rate = Float.parseFloat(json.getString("value"));
                    break;
                default:
                    return -1;
                }
                return rate;
            } catch (NumberFormatException e) {
                log.debug("Couldn't get the current exchnage rate from provider " + String.valueOf(provider));
                return -1;
            }

        } else {
            log.debug("http status " + responseCode + " when fetching " + providerUrl);
        }
    } catch (final Exception x) {
        log.debug("problem reading exchange rates", x);
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (final IOException x) {
                // swallow
            }
        }

        if (connection != null)
            connection.disconnect();
    }

    return -1;
}

From source file:de.jdellay.wallet.ExchangeRatesProvider.java

private static float requestCcnBtcConversion(int provider) {
    HttpURLConnection connection = null;
    Reader reader = null;//from   w  w  w .  jav  a2s . co m
    URL providerUrl;
    switch (provider) {
    case 0:
        providerUrl = CCNPOOL_URL;
        break;
    case 1:
        providerUrl = VIRCUREX_URL;
        break;
    default:
        providerUrl = CCNPOOL_URL;
        break;
    }

    try {
        connection = (HttpURLConnection) providerUrl.openConnection();
        connection.setConnectTimeout(Constants.HTTP_TIMEOUT_MS);
        connection.setReadTimeout(Constants.HTTP_TIMEOUT_MS);
        connection.connect();

        final int responseCode = connection.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            reader = new InputStreamReader(new BufferedInputStream(connection.getInputStream(), 1024),
                    Constants.UTF_8);
            final StringBuilder content = new StringBuilder();
            Io.copy(reader, content);

            try {
                float rate;
                switch (provider) {
                case 0:
                    /*rate = Float.parseFloat(
                        json.getJSONObject("return")
                            .getJSONObject("markets")
                            .getJSONObject("CCN")
                            .getString("lasttradeprice"));*/ //For later use.
                    rate = Float.parseFloat(content.toString());
                    break;
                case 1:
                    final JSONObject json = new JSONObject(content.toString());
                    rate = Float.parseFloat(json.getString("value"));
                    break;
                default:
                    return -1;
                }
                return rate;
            } catch (NumberFormatException e) {
                log.debug("Couldn't get the current exchnage rate from provider " + String.valueOf(provider));
                return -1;
            }

        } else {
            log.debug("http status " + responseCode + " when fetching " + providerUrl);
        }
    } catch (final Exception x) {
        log.debug("problem reading exchange rates", x);
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (final IOException x) {
                // swallow
            }
        }

        if (connection != null)
            connection.disconnect();
    }

    return -1;
}

From source file:com.roadwarrior.vtiger.client.NetworkUtilities.java

/**
 * Fetches the list of friend data updates from the server
 * /*from ww w.  java2s. c  o  m*/
 * @param account The account being synced.
 * @param authtoken The authtoken stored in AccountManager for this account
 * @param lastUpdated The last time that sync was performed
 * @return list The list of updates received from the server.
 */
public static List<User> fetchFriendUpdates(Account account, String auth_url, String authtoken,
        long serverSyncState/*Date lastUpdated*/, String type_contact)
        throws JSONException, ParseException, IOException, AuthenticationException {
    ArrayList<User> friendList = new ArrayList<User>();
    ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
    params.add(new BasicNameValuePair(PARAM_OPERATION, "sync"));
    params.add(new BasicNameValuePair(PARAM_SESSIONNAME, sessionName));
    if (serverSyncState == 0)
        params.add(new BasicNameValuePair("modifiedTime", "878925701")); // il y a 14 ans.... 
    else
        params.add(new BasicNameValuePair("modifiedTime", String.valueOf(serverSyncState)));
    params.add(new BasicNameValuePair("elementType", type_contact)); // "Accounts,Leads , Contacts... 
    Log.d(TAG, "fetchFriendUpdates");
    //   params.add(new BasicNameValuePair(PARAM_QUERY, "select firstname,lastname,mobile,email,homephone,phone from Contacts;"));
    //        if (lastUpdated != null) {
    //            final SimpleDateFormat formatter =
    //                new SimpleDateFormat("yyyy/MM/dd HH:mm");
    //            formatter.setTimeZone(TimeZone.getTimeZone("UTC"));
    //            params.add(new BasicNameValuePair(PARAM_UPDATED, formatter
    //                .format(lastUpdated)));
    //        }

    // HTTP GET REQUEST
    URL url = new URL(auth_url + "/webservice.php?" + URLEncodedUtils.format(params, "utf-8"));
    HttpURLConnection con;
    con = (HttpURLConnection) url.openConnection();
    con.setRequestMethod("GET");
    con.setRequestProperty("Content-length", "0");
    con.setRequestProperty("accept", "application/json");

    con.setUseCaches(false);
    con.setAllowUserInteraction(false);
    int timeout = 10000; // si tiemout pas assez important la connection echouait =>IOEXception
    con.setConnectTimeout(timeout);
    con.setReadTimeout(timeout);
    con.connect();
    int status = con.getResponseCode();

    LastFetchOperationStatus = true;
    if (status == HttpURLConnection.HTTP_OK) {
        // Succesfully connected to the samplesyncadapter server and
        // authenticated.
        // Extract friends data in json format.

        BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream()));
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = br.readLine()) != null) {
            sb.append(line + "\n");
        }
        br.close();

        String response = sb.toString();
        Log.i(TAG, "--response--");
        // <Hack> to bypass vtiger 5.4 webservice bug:
        int idx = response.indexOf("{\"success");
        response = response.substring(idx);
        Log.i(TAG, response);
        // </Hack>
        Log.i(TAG, "--response end--");
        JSONObject result = new JSONObject(response);

        String success = result.getString("success");
        Log.i(TAG, "success is" + success);
        if (success == "true") {
            Log.i(TAG, result.getString("result"));
            final JSONObject data = new JSONObject(result.getString("result"));
            final JSONArray friends = new JSONArray(data.getString("updated"));
            // == VTiger updated contacts ==
            for (int i = 0; i < friends.length(); i++) {
                friendList.add(User.valueOf(friends.getJSONObject(i)));
            }
            // == Vtiger contacts deleted ===
            String deleted_contacts = data.getString("deleted");
            Log.d(TAG, deleted_contacts);
            Log.d(TAG, deleted_contacts.substring(deleted_contacts.indexOf("[")));
            List<String> items = Arrays.asList(
                    deleted_contacts.substring(deleted_contacts.indexOf("[") + 1, deleted_contacts.indexOf("]"))
                            .split("\\s*,\\s*"));
            for (int ii = 0; ii < items.size(); ii++) {
                Log.d(TAG, items.get(ii));
                if (items.get(ii).startsWith("\"4x")) // this is a contact
                {
                    //Log.d(TAG,"{\"id\":"+items.get(ii)+",\"d\":true,\"contact_no\":1}");
                    JSONObject item = new JSONObject(
                            "{\"id\":" + items.get(ii) + ",\"d\":true,\"contact_no\":\"CON1\"}");
                    friendList.add(User.valueOf(item));
                }
                if (items.get(ii).startsWith("\"3x")) // this is an account
                {
                    //Log.d(TAG,"{\"id\":"+items.get(ii)+",\"d\":true,\"contact_no\":1}");
                    JSONObject item = new JSONObject(
                            "{\"id\":" + items.get(ii) + ",\"d\":true,\"account_no\":\"ACC1\"}");
                    friendList.add(User.valueOf(item));
                }
                if (items.get(ii).startsWith("\"2x")) // this is a lead
                {
                    //Log.d(TAG,"{\"id\":"+items.get(ii)+",\"d\":true,\"contact_no\":1}");
                    JSONObject item = new JSONObject(
                            "{\"id\":" + items.get(ii) + ",\"d\":true,\"lead_no\":\"LEA1\"}");
                    friendList.add(User.valueOf(item));
                }
            }
        } else {
            LastFetchOperationStatus = false;
            // FIXME: else false...
            // possible error code :
            //{"success":false,"error":{"code":"AUTHENTICATION_REQUIRED","message":"Authencation required"}}
            //               throw new AuthenticationException();
        }
    } else {
        if (status == HttpURLConnection.HTTP_UNAUTHORIZED) {
            LastFetchOperationStatus = false;

            Log.e(TAG, "Authentication exception in fetching remote contacts");
            throw new AuthenticationException();
        } else {
            LastFetchOperationStatus = false;

            Log.e(TAG, "Server error in fetching remote contacts: ");
            throw new IOException();
        }
    }
    return friendList;
}

From source file:com.webarch.common.net.http.HttpService.java

/**
 * ?Http/*from   www . j ava2  s  .  c  o  m*/
 *
 * @param requestUrl    ?
 * @param requestMethod ?
 * @param outputJson    ?
 * @return 
 */
public static String doHttpRequest(String requestUrl, String requestMethod, String outputJson) {
    String result = null;
    try {
        StringBuffer buffer = new StringBuffer();
        URL url = new URL(requestUrl);
        HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();
        httpUrlConn.setDoOutput(true);
        httpUrlConn.setDoInput(true);
        httpUrlConn.setUseCaches(false);

        httpUrlConn.setUseCaches(false);
        httpUrlConn.setRequestProperty("Accept-Charset", DEFAULT_CHARSET);
        httpUrlConn.setRequestProperty("Content-Type", "application/json;charset=" + DEFAULT_CHARSET);
        // ?GET/POST
        httpUrlConn.setRequestMethod(requestMethod);

        if ("GET".equalsIgnoreCase(requestMethod))
            httpUrlConn.connect();

        // ????
        if (null != outputJson) {
            OutputStream outputStream = httpUrlConn.getOutputStream();
            //??
            outputStream.write(outputJson.getBytes(DEFAULT_CHARSET));
            outputStream.close();
        }

        // ???
        InputStream inputStream = httpUrlConn.getInputStream();
        InputStreamReader inputStreamReader = new InputStreamReader(inputStream, DEFAULT_CHARSET);
        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

        String str = null;
        while ((str = bufferedReader.readLine()) != null) {
            buffer.append(str);
        }
        result = buffer.toString();
        bufferedReader.close();
        inputStreamReader.close();
        // ?
        inputStream.close();
        httpUrlConn.disconnect();
    } catch (ConnectException ce) {
        logger.error("server connection timed out.", ce);
    } catch (Exception e) {
        logger.error("http request error:", e);
    } finally {
        return result;
    }
}

From source file:com.mobile.natal.natalchart.NetworkUtilities.java

/**
 * Sends an HTTP GET request to a url//w ww. j ava 2s .  c  o  m
 *
 * @param urlStr            - The URL of the server. (Example: " http://www.yahoo.com/search")
 * @param file              the output file. If it is a folder, it tries to get the file name from the header.
 * @param requestParameters - all the request parameters (Example: "param1=val1&param2=val2").
 *                          Note: This method will add the question mark (?) to the request -
 *                          DO NOT add it yourself
 * @param user              user.
 * @param password          password.
 * @return the file written.
 * @throws Exception if something goes wrong.
 */
public static File sendGetRequest4File(String urlStr, File file, String requestParameters, String user,
        String password) throws Exception {
    if (requestParameters != null && requestParameters.length() > 0) {
        urlStr += "?" + requestParameters;
    }
    HttpURLConnection conn = makeNewConnection(urlStr);
    conn.setRequestMethod("GET");
    // conn.setDoOutput(true);
    conn.setDoInput(true);
    // conn.setChunkedStreamingMode(0);
    conn.setUseCaches(false);

    if (user != null && password != null && user.trim().length() > 0 && password.trim().length() > 0) {
        conn.setRequestProperty("Authorization", getB64Auth(user, password));
    }
    conn.connect();

    if (file.isDirectory()) {
        // try to get the header
        String headerField = conn.getHeaderField("Content-Disposition");
        String fileName = null;
        if (headerField != null) {
            String[] split = headerField.split(";");
            for (String string : split) {
                String pattern = "filename=";
                if (string.toLowerCase().startsWith(pattern)) {
                    fileName = string.replaceFirst(pattern, "");
                    break;
                }
            }
        }
        if (fileName == null) {
            // give a name
            fileName = "FILE_" + TimeUtilities.INSTANCE.TIMESTAMPFORMATTER_LOCAL.format(new Date());
        }
        file = new File(file, fileName);
    }

    InputStream in = null;
    FileOutputStream out = null;
    try {
        in = conn.getInputStream();
        out = new FileOutputStream(file);

        byte[] buffer = new byte[(int) maxBufferSize];
        int bytesRead = in.read(buffer, 0, (int) maxBufferSize);
        while (bytesRead > 0) {
            out.write(buffer, 0, bytesRead);
            bytesRead = in.read(buffer, 0, (int) maxBufferSize);
        }
        out.flush();
    } finally {
        if (in != null)
            in.close();
        if (out != null)
            out.close();
        if (conn != null)
            conn.disconnect();
    }
    return file;
}

From source file:edu.stanford.epadd.launcher.Splash.java

private static boolean killRunningServer(String url) throws IOException {
    try {//w  w  w  . j  a  v  a2  s.com
        // attempt to fetch the page
        // throws a connect exception if the server is not even running
        // so catch it and return false
        // String http = url + "exit.jsp?message=Shutdown%20request%20from%20a%20different%20instance%20of%20ePADD"; // version num spaces and brackets screw up the URL connection

        // actually this should not be a HTTP connection, it can be simply any connection
        out.println("Sending a kill request to " + url);
        HttpURLConnection u = (HttpURLConnection) new URL(url).openConnection();
        u.connect();
        if (u.getResponseCode() == 200) {
            u.disconnect();
            return true;
        }
        u.disconnect();
    } catch (ConnectException ce) {
        err.println("Warning: unable to kill running server: " + ce);
    }
    return false;
}

From source file:br.bireme.tb.URLS.java

/**
 * Given an url, loads its content (GET - method)
 * @param url url to be loaded/*  w  w  w  .  j  av  a 2s.c om*/
 * @return an array with the real location of the page (in case of redirect)
 * and its content.
 * @throws IOException
 */
public static String[] loadPageGet(final URL url) throws IOException {
    if (url == null) {
        throw new NullPointerException("url");
    }
    System.out.print("loading page (GET) : [" + url + "]");
    HttpURLConnection.setFollowRedirects(false);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("GET");
    connection.setRequestProperty("Accept-Charset", DEFAULT_ENCODING);
    connection.setRequestProperty("User-Agent", "curl/7.29.0");
    connection.setRequestProperty("Accept", "*/*");
    connection.connect();

    int respCode = connection.getResponseCode();
    final StringBuilder builder = new StringBuilder();
    String location = url.toString();

    while ((respCode >= 300) && (respCode <= 399)) {
        location = connection.getHeaderField("Location");
        connection = (HttpURLConnection) new URL(location).openConnection();
        respCode = connection.getResponseCode();
    }

    final boolean respCodeOk = (respCode == 200);
    final BufferedReader reader;
    boolean skipLine = false;

    if (respCodeOk) {
        reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), DEFAULT_ENCODING));
    } else {
        reader = new BufferedReader(new InputStreamReader(connection.getErrorStream(), DEFAULT_ENCODING));
    }

    while (true) {
        String line = reader.readLine();
        if (line == null) {
            break;
        }
        final String line2 = line.trim();

        if (line2.startsWith("<!--")) {
            if (line2.endsWith("-->")) {
                continue;
            }
            skipLine = true;
        } else if (line2.endsWith("-->")) {
            skipLine = false;
            line = "";
        }
        if (!skipLine) {
            builder.append(line);
            builder.append("\n");
        }
    }
    reader.close();
    connection.disconnect();

    if (!respCodeOk) {
        throw new IOException("url=[" + url + "]\ncode=" + respCode + "\n" + builder.toString());
    }
    //System.out.print("+");
    System.out.println(" - OK");

    return new String[] { location, builder.toString() };
}

From source file:manchester.synbiochem.datacapture.SeekConnector.java

private static Status postForm(HttpURLConnection c, MultipartFormData form) throws IOException {
    c.setInstanceFollowRedirects(false);
    c.setDoOutput(true);//from ww w. j  av a 2s.c o  m
    c.setRequestMethod("POST");
    c.setRequestProperty("Content-Type", form.contentType());
    c.setRequestProperty("Content-Length", form.length());
    c.connect();
    try (OutputStream os = c.getOutputStream()) {
        os.write(form.content());
    }
    return fromStatusCode(c.getResponseCode());
}

From source file:com.stockita.popularmovie.utility.Utilities.java

/**
 * This will make a GET request to a RESTful web.
 *
 * @return String of JSON format/*w  ww .  java  2s . c  o  m*/
 */
public static String getMovieData(String uri, Context context) {

    BufferedReader reader = null;
    HttpURLConnection con = null;

    try {
        URL url = new URL(uri);
        con = (HttpURLConnection) url.openConnection();
        con.setReadTimeout(10000 /* milliseconds */);
        con.setConnectTimeout(15000 /* milliseconds */);
        con.setRequestMethod(REQUEST_METHOD_GET);
        con.connect();

        int response = con.getResponseCode();

        if (response < 200 || response > 299) {
            Log.e(LOG_TAG, "connection failed: " + response);
            sNetworkResponse = false;
            return null;
        }

        InputStream inputStream = con.getInputStream();

        // Return null if no date
        if (inputStream == null) {
            Log.e(LOG_TAG, "inputStream returned null");
            return null;
        }

        reader = new BufferedReader(new InputStreamReader(inputStream));
        StringBuilder builder = new StringBuilder();

        String line;
        while ((line = reader.readLine()) != null) {
            builder.append(line + "\n");
        }

        // Return null if no data
        if (builder.length() == 0) {
            Log.e(LOG_TAG, "builder return null");
            return null;
        }

        return builder.toString();

    } catch (IOException e) {
        Log.e(LOG_TAG, e.toString());
        sNetworkResponse = false;
        return null;
    } finally {
        try {
            if (reader != null)
                reader.close();
            if (con != null)
                con.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
            Log.e(LOG_TAG, e.toString());
        }
    }
}

From source file:au.com.tyo.sn.shortener.GooGl.java

private static String post(String url) {
    HttpURLConnection httpcon = null;

    try {//ww w  .  j a v  a2 s . c o m
        httpcon = (HttpURLConnection) ((new URL(GOO_GL_REQUEST_URL).openConnection()));

        httpcon.setDoOutput(true);
        httpcon.setRequestProperty("Content-Type", "application/json");
        httpcon.setRequestProperty("Accept", "application/json");
        httpcon.setRequestMethod("POST");
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    byte[] outputBytes = { 0 };
    OutputStream os = null;
    InputStream is = null;
    BufferedReader in = null;
    StringBuilder text = new StringBuilder();

    try {
        outputBytes = ("{'longUrl': \"" + url + "\"}").getBytes("UTF-8");
        httpcon.setRequestProperty("Content-Length", Integer.toString(outputBytes.length));
        httpcon.connect();
        os = httpcon.getOutputStream();
        os.write(outputBytes);
        is = httpcon.getInputStream();
        in = new BufferedReader(new InputStreamReader(is, "UTF-8"));

        if (in != null) {
            // get page text
            String line;

            while ((line = in.readLine()) != null) {
                text.append(line);
                text.append("\n");
            }
        }

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (os != null)
                os.close();
            if (is != null)
                is.close();
            if (in != null)
                in.close();
        } catch (IOException e) {
        }
    }

    return text.toString();
}