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.eryansky.common.web.servlet.RemoteContentServlet.java

private void fetchContentByJDKConnection(HttpServletResponse response, String contentUrl) throws IOException {

    HttpURLConnection connection = (HttpURLConnection) new URL(contentUrl).openConnection();
    // Socket//from w w  w.j ava 2s  . co  m
    connection.setReadTimeout(TIMEOUT_SECONDS * 1000);
    try {
        connection.connect();

        // ?
        InputStream input;
        try {
            input = connection.getInputStream();
        } catch (FileNotFoundException e) {
            response.sendError(HttpServletResponse.SC_NOT_FOUND, contentUrl + " is not found.");
            return;
        }

        // Header
        response.setContentType(connection.getContentType());
        if (connection.getContentLength() > 0) {
            response.setContentLength(connection.getContentLength());
        }

        // 
        OutputStream output = response.getOutputStream();
        try {
            // byte?InputStreamOutputStream, ?4k.
            IOUtils.copy(input, output);
            output.flush();
        } finally {
            // ??InputStream.
            IOUtils.closeQuietly(input);
        }
    } finally {
        connection.disconnect();
    }
}

---

From source file:br.bireme.accounts.Authentication.java

public JSONObject getUser(final String user, final String password) throws IOException, ParseException {
    if (user == null) {
        throw new NullPointerException("user");
    }/*w  w  w. j av  a  2 s .  c om*/
    if (password == null) {
        throw new NullPointerException("password");
    }

    final JSONObject parameters = new JSONObject();
    parameters.put("username", user);
    parameters.put("password", password);
    parameters.put("service", SERVICE_NAME);
    parameters.put("format", "json");

    //final URL url = new URL("http", host, port, DEFAULT_PATH);
    final URL url = new URL("http://" + host + DEFAULT_PATH);
    final HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestProperty("Content-Type", "application/json");
    connection.setDoInput(true);
    connection.setDoOutput(true);
    connection.connect();

    final StringBuilder builder = new StringBuilder();
    final BufferedWriter writer = new BufferedWriter(
            new OutputStreamWriter(connection.getOutputStream(), "UTF-8"));

    //final String message = parameters.toJSONString();
    //System.out.println(message);

    writer.write(parameters.toJSONString());
    writer.newLine();
    writer.close();

    final int respCode = connection.getResponseCode();
    final boolean respCodeOk = (respCode == 200);
    final BufferedReader reader;

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

    while (true) {
        final String line = reader.readLine();
        if (line == null) {
            break;
        }
        builder.append(line);
        builder.append("\n");
    }

    reader.close();

    if (!respCodeOk && (respCode != 401)) {
        throw new IOException(builder.toString());
    }

    return (JSONObject) new JSONParser().parse(builder.toString());
}

---

From source file:com.cloudbees.mtslaves.client.RemoteReference.java

protected HttpURLConnection postJson(HttpURLConnection con, JSONObject json) throws IOException {
    try {//from  w w  w.  j  a  v a  2  s . co m
        token.authorizeRequest(con);
        con.setDoOutput(true);
        con.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
        con.connect();

        // send JSON
        OutputStreamWriter w = new OutputStreamWriter(con.getOutputStream(), "UTF-8");
        json.write(w);
        w.close();

        return con;
    } catch (IOException e) {
        throw (IOException) new IOException("Failed to POST to " + url).initCause(e);
    }
}

---

From source file:io.indy.drone.service.ScheduledService.java

private String httpGet(String path) throws IOException {
    BufferedReader reader = null;
    try {// w  w w  .ja v  a 2 s  .  com
        URL url = new URL(path);
        HttpURLConnection c = (HttpURLConnection) url.openConnection();

        c.setRequestMethod("GET");
        c.setReadTimeout(15000);
        c.connect();

        reader = new BufferedReader(new InputStreamReader(c.getInputStream()));
        StringBuilder buf = new StringBuilder();
        String line;

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

        return buf.toString();

    } finally {
        if (reader != null) {
            reader.close();
        }
    }
}

---

From source file:com.acrutiapps.browser.tasks.SearchUrlTask.java

@Override
protected String doInBackground(Void... params) {

    publishProgress(0);//from  w ww.j a v  a 2  s.  co m

    String message = null;
    HttpURLConnection c = null;

    try {
        URL url = new URL("http://anasthase.github.com/TintBrowser/search-engines.json");
        c = (HttpURLConnection) url.openConnection();

        c.connect();

        int responseCode = c.getResponseCode();

        if (responseCode == 200) {
            StringBuilder sb = new StringBuilder();

            InputStream is = c.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(is));

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

            publishProgress(1);

            JSONArray jsonArray = new JSONArray(sb.toString());

            for (int i = 0; i < jsonArray.length(); i++) {
                JSONObject jsonObject = jsonArray.getJSONObject(i);

                String groupName = jsonObject.getString("group");

                SearchUrlGroup group = mResults.get(groupName);
                if (group == null) {
                    group = new SearchUrlGroup(groupName);
                    mResults.put(groupName, group);
                }

                JSONArray items = jsonObject.getJSONArray("items");
                for (int j = 0; j < items.length(); j++) {
                    JSONObject item = items.getJSONObject(j);

                    group.addItem(item.getString("name"), item.getString("url"));
                }
            }

        } else {
            message = String.format(mContext.getString(R.string.SearchUrlBadResponseCodeMessage),
                    Integer.toString(responseCode));
        }

    } catch (MalformedURLException e) {
        message = e.getMessage();
    } catch (IOException e) {
        message = e.getMessage();
    } catch (JSONException e) {
        message = e.getMessage();
    } finally {
        if (c != null) {
            c.disconnect();
        }
    }

    return message;
}

---

From source file:ai.api.RequestTask.java

@Override
protected String doInBackground(final String... params) {
    final String payload = params[0];
    if (TextUtils.isEmpty(payload)) {
        throw new IllegalArgumentException("payload argument should not be empty");
    }/*ww w .  j  av  a2  s  .  co m*/

    String response = null;
    HttpURLConnection connection = null;

    try {
        connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("POST");
        connection.setDoOutput(true);
        connection.addRequestProperty("Authorization", "Bearer " + accessToken);

        connection.connect();

        final BufferedOutputStream outputStream = new BufferedOutputStream(connection.getOutputStream());
        IOUtils.write(payload, outputStream, Charsets.UTF_8);
        outputStream.close();

        final InputStream inputStream = new BufferedInputStream(connection.getInputStream());
        response = IOUtils.toString(inputStream, Charsets.UTF_8);
        inputStream.close();

        return response;

    } catch (final IOException e) {
        Log.e(TAG,
                "Can't make request to the Speaktoit AI service. Please, check connection settings and API access token.",
                e);
    } finally {
        if (connection != null) {
            connection.disconnect();
        }
    }

    return null;
}

---

From source file:com.predic8.membrane.core.interceptor.balancer.NodeOnlineChecker.java

private List<BadNode> pingOfflineNodes() {
    ArrayList<BadNode> onlineNodes = new ArrayList<BadNode>();

    for (BadNode node : offlineNodes) {
        URL url = null;//ww w .  ja  v  a 2  s. c o  m
        try {
            url = new URL(node.getNode().getHost());
        } catch (MalformedURLException ignored) {
            continue;
        }
        try {
            HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
            urlConn.setConnectTimeout(pingTimeoutInSeconds * 1000);
            urlConn.connect();
            if (urlConn.getResponseCode() == HttpURLConnection.HTTP_OK)
                onlineNodes.add(node);
        } catch (IOException ignored) {
            continue;
        }
    }

    return onlineNodes;
}

---

From source file:com.googlecode.jsonrpc4j.JsonRpcHttpClient.java

/**
 * Invokes the given method with the given arguments and returns
 * an object of the given type, or null if void.
 *
 * @see JsonRpcClient#writeRequest(String, Object, java.io.OutputStream, String)
 * @param methodName the name of the method to invoke
 * @param arguments the arguments to the method
 * @param returnType the return type/*from   ww w. ja  va2s. c om*/
 * @param extraHeaders extra headers to add to the request
 * @return the return value
 * @throws Throwable on error
 */
public Object invoke(String methodName, Object argument, Type returnType, Map<String, String> extraHeaders)
        throws Throwable {

    // create URLConnection
    HttpURLConnection con = prepareConnection(extraHeaders);
    con.connect();

    // invoke it
    OutputStream ops = con.getOutputStream();
    try {
        super.invoke(methodName, argument, ops);
    } finally {
        ops.close();
    }

    // read and return value
    try {
        InputStream ips = con.getInputStream();
        try {
            // in case of http error try to read response body and return it in exception
            return super.readResponse(returnType, ips);
        } finally {
            ips.close();
        }
    } catch (IOException e) {
        throw new HttpException(readString(con.getErrorStream()), e);
    }
}

---

From source file:com.cannabiscoin.wallet.ExchangeRatesProvider.java

private static Map<String, ExchangeRate> requestExchangeRates(final URL url, final String userAgent,
        final String... fields) {
    final long start = System.currentTimeMillis();

    HttpURLConnection connection = null;
    Reader reader = null;/* w  w  w.j  a  v a2  s .  c  om*/

    try {

        Double btcRate = 0.0;
        boolean cryptsyValue = true;
        Object result = getCoinValueBTC();

        if (result == null) {
            result = getCoinValueBTC_BTER();
            cryptsyValue = false;
            if (result == null)
                return null;
        }
        btcRate = (Double) result;

        connection = (HttpURLConnection) url.openConnection();

        connection.setInstanceFollowRedirects(false);
        connection.setConnectTimeout(Constants.HTTP_TIMEOUT_MS);
        connection.setReadTimeout(Constants.HTTP_TIMEOUT_MS);
        connection.addRequestProperty("User-Agent", userAgent);
        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);

            final Map<String, ExchangeRate> rates = new TreeMap<String, ExchangeRate>();

            final JSONObject head = new JSONObject(content.toString());
            for (final Iterator<String> i = head.keys(); i.hasNext();) {
                final String currencyCode = i.next();
                if (!"timestamp".equals(currencyCode)) {
                    final JSONObject o = head.getJSONObject(currencyCode);

                    for (final String field : fields) {
                        String rateStr = o.optString(field, null);

                        if (rateStr != null) {
                            try {
                                double rateForBTC = Double.parseDouble(rateStr);

                                rateStr = String.format("%.8f", rateForBTC * btcRate).replace(",", ".");

                                final BigInteger rate = GenericUtils.toNanoCoins(rateStr, 0);

                                if (rate.signum() > 0) {
                                    rates.put(currencyCode,
                                            new ExchangeRate(currencyCode, rate, url.getHost()));
                                    break;
                                }
                            } catch (final ArithmeticException x) {
                                log.warn("problem fetching {} exchange rate from {}: {}",
                                        new Object[] { currencyCode, url, x.getMessage() });
                            }

                        }
                    }
                }
            }

            log.info("fetched exchange rates from {}, took {} ms", url, (System.currentTimeMillis() - start));

            //Add Bitcoin information
            if (rates.size() == 0) {
                int i = 0;
                i++;
            } else {
                rates.put(CoinDefinition.cryptsyMarketCurrency,
                        new ExchangeRate(CoinDefinition.cryptsyMarketCurrency,
                                GenericUtils.toNanoCoins(String.format("%.8f", btcRate).replace(",", "."), 0),
                                cryptsyValue ? "pubapi.cryptsy.com" : "data.bter.com"));
                rates.put("m" + CoinDefinition.cryptsyMarketCurrency,
                        new ExchangeRate("m" + CoinDefinition.cryptsyMarketCurrency,
                                GenericUtils.toNanoCoins(
                                        String.format("%.5f", btcRate * 1000).replace(",", "."), 0),
                                cryptsyValue ? "pubapi.cryptsy.com" : "data.bter.com"));
            }

            return rates;
        } else {
            log.warn("http status {} when fetching {}", responseCode, url);
        }
    } catch (final Exception x) {
        log.warn("problem fetching exchange rates from " + url, x);
    } finally {

        if (reader != null) {
            try {
                reader.close();
            } catch (final IOException x) {
                // swallow
            }
        }

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

    return null;
}

---

From source file:ms.sujinkim.com.test.api.FoscamSnapshotRunnable.java

public void run() {
    ToastManager manager = ToastManager.getInstance();
    HttpURLConnection conn = null;
    String urlString = FoscamUrlFactory.getSnapshotUrl(camera);
    //DefaultHttpClient client = new DefaultHttpClient();
    try {//from   ww w  .j  a  v a  2s .  c  om
        URL url = new URL(urlString);
        conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        conn.connect();
        int status = conn.getResponseCode();
        if (status != 200) {
            manager.makeToast("Unable to take snapshot: " + status);
            conn.disconnect();
            return;
        }

        String name = conn.getHeaderField(CONTENT_DISPOSITION);// ? name?  ?.
        InputStream inputStream = conn.getInputStream();
        if (inputStream != null) {
            writeSnapshot(name, inputStream);
            manager.makeToast("Saved \"" + name + "\"");
        }
    } catch (Exception e) {
        ToastManager.getInstance().makeToast("Unable to take snapshot: " + e.getMessage());
    } finally {
        conn.disconnect();
    }
}

---

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