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:eu.eubrazilcc.lvl.oauth2.AuthTest.java

private static HttpURLConnection doRequest(final OAuthClientRequest request) throws IOException {
    final URL url = new URL(request.getLocationUri());
    final HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setInstanceFollowRedirects(true);
    conn.connect();
    conn.getResponseCode();//from ww w.  j a  v  a  2  s. c om
    return conn;
}

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From source file:com.nhncorp.lucy.security.xss.listener.SecurityUtils.java

public static String getContentTypeFromUrlConnection(String strUrl, ContentTypeCacheRepo contentTypeCacheRepo) {
    // cache ?  ?.
    String result = contentTypeCacheRepo.getContentTypeFromCache(strUrl);
    //System.out.println("getContentTypeFromCache : " + result);
    if (StringUtils.isNotEmpty(result)) {
        return result;
    }/*from   w  ww . j  av  a2  s  . c o m*/

    HttpURLConnection con = null;

    try {
        URL url = new URL(strUrl);
        con = (HttpURLConnection) url.openConnection();
        con.setRequestMethod("HEAD");
        con.setConnectTimeout(1000);
        con.setReadTimeout(1000);
        con.connect();

        int resCode = con.getResponseCode();

        if (resCode != HttpURLConnection.HTTP_OK) {
            System.err.println("error");
        } else {
            result = con.getContentType();
            //System.out.println("content-type from response header: " + result);

            if (result != null) {
                contentTypeCacheRepo.addContentTypeToCache(strUrl, new ContentType(result, new Date()));
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (con != null) {
            con.disconnect();
        }
    }

    return result;

}

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From source file:io.github.bonigarcia.wdm.Downloader.java

private static HttpURLConnection getConnection(URL url) throws IOException {
    Proxy proxy = createProxy();//from   w  ww. j a  va2 s  .c  om
    URLConnection conn1 = proxy != null ? url.openConnection(proxy) : url.openConnection();
    HttpURLConnection conn = (HttpURLConnection) conn1;
    conn.setRequestProperty("User-Agent", "Mozilla/5.0");
    conn.addRequestProperty("Connection", "keep-alive");
    conn.setInstanceFollowRedirects(true);
    HttpURLConnection.setFollowRedirects(true);
    conn.connect();
    return conn;
}

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From source file:net.doubledoordev.cmd.CurseModpackDownloader.java

public static String getFinalURL(String url) throws IOException {
    while (true) {
        HttpURLConnection con = null;
        try {/* ww  w .  j a v  a2s.  c o m*/
            con = (HttpURLConnection) new URL(url).openConnection();
            con.setInstanceFollowRedirects(false);
            con.connect();
            if (con.getHeaderField("Location") == null)
                return url;
            url = con.getHeaderField("Location");
        } catch (IOException e) {
            return url;
        } finally {
            if (con != null)
                con.disconnect();
        }
    }
}

---

From source file:Main.java

public static String customrequest(String url, HashMap<String, String> params, String method) {
    try {/*from   w w w. ja  v a2 s  .  c  o  m*/

        URL postUrl = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) postUrl.openConnection();
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setConnectTimeout(5 * 1000);

        conn.setRequestMethod(method);
        conn.setUseCaches(false);
        conn.setInstanceFollowRedirects(true);
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows XP; DigExt)");

        conn.connect();
        OutputStream out = conn.getOutputStream();
        StringBuilder sb = new StringBuilder();
        if (null != params) {
            int i = params.size();
            for (Map.Entry<String, String> entry : params.entrySet()) {
                if (i == 1) {
                    sb.append(entry.getKey() + "=" + entry.getValue());
                } else {
                    sb.append(entry.getKey() + "=" + entry.getValue() + "&");
                }

                i--;
            }
        }
        String content = sb.toString();
        out.write(content.getBytes("UTF-8"));
        out.flush();
        out.close();
        InputStream inStream = conn.getInputStream();
        String result = inputStream2String(inStream);
        conn.disconnect();
        return result;
    } catch (Exception e) {
        // TODO: handle exception
    }
    return null;
}

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From source file:org.immopoly.android.helper.WebHelper.java

public static JSONObject getHttpsData(URL url, boolean signed, Context context) throws ImmopolyException {
    JSONObject obj = null;/*w  w  w  .j  a v  a  2 s.  c  om*/
    if (Settings.isOnline(context)) {
        HttpURLConnection request;
        try {
            request = (HttpURLConnection) url.openConnection();
            request.addRequestProperty("User-Agent",
                    "immopoly android client " + ImmopolyActivity.getStaticVersionInfo());

            if (signed)
                OAuthData.getInstance(context).consumer.sign(request);

            request.setConnectTimeout(SOCKET_TIMEOUT);
            request.connect();

            InputStream in = new BufferedInputStream(request.getInputStream());
            String s = readInputStream(in);
            JSONTokener tokener = new JSONTokener(s);
            return new JSONObject(tokener);
        } catch (JSONException e) {
            throw new ImmopolyException("Kommunikationsproblem (beim lesen der Antwort)", e);
        } catch (MalformedURLException e) {
            throw new ImmopolyException("Kommunikationsproblem (fehlerhafte URL)", e);
        } catch (OAuthMessageSignerException e) {
            throw new ImmopolyException("Kommunikationsproblem (Signierung)", e);
        } catch (OAuthExpectationFailedException e) {
            throw new ImmopolyException("Kommunikationsproblem (Sicherherit)", e);
        } catch (OAuthCommunicationException e) {
            throw new ImmopolyException("Kommunikationsproblem (Sicherherit)", e);
        } catch (IOException e) {
            throw new ImmopolyException("Kommunikationsproblem", e);
        }
    } else
        throw new ImmopolyException("Kommunikationsproblem (Offline)");
}

---

From source file:website.openeng.anki.web.HttpFetcher.java

public static String downloadFileToSdCardMethod(String UrlToFile, Context context, String prefix,
        String method) {//www  .j  ava2s  .  co m
    try {
        URL url = new URL(UrlToFile);

        String extension = UrlToFile.substring(UrlToFile.length() - 4);

        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setRequestMethod(method);
        urlConnection.setRequestProperty("Referer", "website.openeng.anki");
        urlConnection.setRequestProperty("User-Agent", "Mozilla/5.0 ( compatible ) ");
        urlConnection.setRequestProperty("Accept", "*/*");
        urlConnection.setConnectTimeout(10000);
        urlConnection.setReadTimeout(60000);
        urlConnection.connect();

        File file = File.createTempFile(prefix, extension, context.getCacheDir());

        FileOutputStream fileOutput = new FileOutputStream(file);
        InputStream inputStream = urlConnection.getInputStream();

        byte[] buffer = new byte[1024];
        int bufferLength = 0;

        while ((bufferLength = inputStream.read(buffer)) > 0) {
            fileOutput.write(buffer, 0, bufferLength);
        }
        fileOutput.close();

        return file.getAbsolutePath();

    } catch (Exception e) {
        return "FAILED " + e.getMessage();
    }
}

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From source file:com.delicious.deliciousfeeds4J.DeliciousUtil.java

public static String expandShortenedUrl(String shortenedUrl, String userAgent) throws IOException {

    if (shortenedUrl == null || shortenedUrl.isEmpty())
        return shortenedUrl;

    if (userAgent == null || userAgent.isEmpty())
        throw new IllegalArgumentException("UserAgent must not be null or empty!");

    if (shortenedUrl.contains(URL_SHORTENED_SNIPPET) == false)
        return shortenedUrl;

    logger.debug("Trying to expand shortened url: " + shortenedUrl);

    final URL url = new URL(shortenedUrl);

    final HttpURLConnection connection = (HttpURLConnection) url.openConnection(Proxy.NO_PROXY);

    try {/*from w w w  . ja v a2  s. co m*/
        connection.setInstanceFollowRedirects(false);
        connection.setRequestProperty("User-Agent", userAgent);
        connection.connect();
        final String expandedDeliciousUrl = connection.getHeaderField("Location");

        if (expandedDeliciousUrl.contains("url=")) {

            final Matcher matcher = URL_PARAMETER_PATTERN.matcher(expandedDeliciousUrl);

            if (matcher.find()) {
                final String expanded = matcher.group();

                logger.trace("Successfully expanded: " + shortenedUrl + " -> " + expandedDeliciousUrl + " -> "
                        + expanded);

                return expanded;
            }
        }
    } catch (Exception ex) {
        logger.debug("Error while trying to expand shortened url: " + shortenedUrl, ex);
    } finally {
        connection.getInputStream().close();
    }

    return shortenedUrl;
}

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From source file:LNISmokeTest.java

/**
 * Get an item with WebDAV GET http request.
 * /* w ww .j a v  a  2 s .com*/
 * @param lni the lni
 * @param itemHandle the item handle
 * @param packager the packager
 * @param output the output
 * @param endpoint the endpoint
 * 
 * @throws RemoteException the remote exception
 * @throws ProtocolException the protocol exception
 * @throws IOException Signals that an I/O exception has occurred.
 * @throws FileNotFoundException the file not found exception
 */
private static void doGet(LNISoapServlet lni, String itemHandle, String packager, String output,
        String endpoint)
        throws java.rmi.RemoteException, ProtocolException, IOException, FileNotFoundException {
    // assemble URL from chopped endpoint-URL and relative URI
    String itemURI = doLookup(lni, itemHandle, null);
    URL url = LNIClientUtils.makeDAVURL(endpoint, itemURI, packager);
    System.err.println("DEBUG: GET from URL: " + url.toString());

    // connect with GET method, then copy file over.
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("GET");
    conn.setDoInput(true);
    fixBasicAuth(url, conn);
    conn.connect();
    int status = conn.getResponseCode();
    if (status < 200 || status >= 300) {
        die(status, "HTTP error, status=" + String.valueOf(status) + ", message=" + conn.getResponseMessage());
    }

    InputStream in = conn.getInputStream();
    OutputStream out = new FileOutputStream(output);
    copyStream(in, out);
    in.close();
    out.close();

    System.err.println("DEBUG: Created local file " + output);
    System.err.println(
            "RESULT: Status=" + String.valueOf(conn.getResponseCode()) + " " + conn.getResponseMessage());
}

---

From source file:hashengineering.digitalcoin.wallet.ExchangeRatesProvider.java

private static Map<String, ExchangeRate> getBlockchainInfo() {
    try {//from w w  w  .j av a 2 s .c o m
        Double btcRate = 0.0;

        Object result = getCoinValueBTC();

        if (result == null)
            return null;

        else
            btcRate = (Double) result;

        final URL URL = new URL("https://blockchain.info/ticker");
        final HttpURLConnection connection = (HttpURLConnection) URL.openConnection();
        connection.setConnectTimeout(Constants.HTTP_TIMEOUT_MS);
        connection.setReadTimeout(Constants.HTTP_TIMEOUT_MS);
        connection.connect();

        if (connection.getResponseCode() != HttpURLConnection.HTTP_OK)
            return null;

        Reader reader = null;
        try {
            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>();

            //Add Bitcoin information
            rates.put(CoinDefinition.cryptsyMarketCurrency,
                    new ExchangeRate(CoinDefinition.cryptsyMarketCurrency,
                            Utils.toNanoCoins(String.format("%.8f", btcRate).replace(",", ".")),
                            "pubapi.cryptsy.com"));

            final JSONObject head = new JSONObject(content.toString());
            for (final Iterator<String> i = head.keys(); i.hasNext();) {
                final String currencyCode = i.next();
                final JSONObject o = head.getJSONObject(currencyCode);
                //final String rate = o.optString("15m", null);

                double rateForBTC = o.getDouble("15m") * btcRate;

                final String rate = String.format("%.8f", rateForBTC); //o.optString("15m", null);

                if (rate != null) {
                    try {
                        rates.put(currencyCode, new ExchangeRate(currencyCode,
                                Utils.toNanoCoins(rate.replace(",", ".")), URL.getHost()));
                    } catch (final ArithmeticException x) {
                        log.debug("problem reading exchange rate: " + currencyCode, x);
                    }
                }
            }

            return rates;
        } finally {
            if (reader != null)
                reader.close();
        }
    } catch (final Exception x) {
        log.debug("problem reading exchange rates", x);
    }

    return null;
}

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