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.nit.vicky.web.HttpFetcher.java

public static String downloadFileToSdCardMethod(String UrlToFile, Context context, String prefix, String method,
        Boolean isMP3) {/*from w  ww  .  j  a va 2 s.  co  m*/
    try {
        URL url = new URL(UrlToFile);

        String extension = ".mp3";

        if (!isMP3)
            extension = UrlToFile.substring(UrlToFile.lastIndexOf("."));

        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setConnectTimeout(10 * 1000);
        urlConnection.setReadTimeout(10 * 1000);
        urlConnection.setRequestMethod(method);
        //urlConnection.setRequestProperty("Referer", "http://mm.taobao.com/");
        urlConnection.setRequestProperty("User-Agent", "Mozilla/5.0 ( compatible ) ");
        urlConnection.setRequestProperty("Accept", "*/*");
        urlConnection.connect();

        File file = File.createTempFile(prefix, extension, DiskUtil.getStoringDirectory());

        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();
    }
}

---

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

private static Map<String, ExchangeRate> getBitcoinCharts() {
    try {//  w ww . 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("http://api.bitcoincharts.com/v1/weighted_prices.json");
        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();
                if (!"timestamp".equals(currencyCode)) {
                    final JSONObject o = head.getJSONObject(currencyCode);
                    String rate = o.optString("24h", null);
                    if (rate == null)
                        rate = o.optString("7d", null);
                    if (rate == null)
                        rate = o.optString("30d", null);

                    double rateForBTC = Double.parseDouble(rate);

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

                    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;
}

---

From source file:de.mas.telegramircbot.utils.images.ImgurUploader.java

public static String uploadImageAndGetLink(String clientID, byte[] image) throws IOException {
    URL url;//w  w  w.  j  a va 2  s.  c  o m
    url = new URL(Settings.IMGUR_API_URL);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();

    String dataImage = Base64.getEncoder().encodeToString(image);
    String data = URLEncoder.encode("image", "UTF-8") + "=" + URLEncoder.encode(dataImage, "UTF-8");

    conn.setDoOutput(true);
    conn.setDoInput(true);
    conn.setRequestMethod("POST");
    conn.setRequestProperty("Authorization", "Client-ID " + clientID);
    conn.setRequestMethod("POST");
    conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

    conn.connect();
    StringBuilder stb = new StringBuilder();
    OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
    wr.write(data);
    wr.flush();

    // Get the response
    BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    String line;
    while ((line = rd.readLine()) != null) {
        stb.append(line).append("\n");
    }
    wr.close();
    rd.close();

    GsonBuilder gsonBuilder = new GsonBuilder();
    gsonBuilder.registerTypeAdapter(ImgurResponse.class, new ImgurResponseDeserializer());
    Gson gson = gsonBuilder.create();

    // The JSON data
    try {
        ImgurResponse response = gson.fromJson(stb.toString(), ImgurResponse.class);
        return response.getLink();
    } catch (Exception e) {
        e.printStackTrace();
    }

    return stb.toString();
}

---

From source file:fr.zcraft.zbanque.network.PacketSender.java

private static HTTPResponse makeRequest(String url, PacketPlayOut.PacketType method, String data)
        throws Throwable {
    // ***  REQUEST  ***

    final URL urlObj = new URL(url);
    final HttpURLConnection connection = (HttpURLConnection) urlObj.openConnection();

    connection.setRequestMethod(method.name());
    connection.setRequestProperty("User-Agent", USER_AGENT);

    authenticateRequest(connection);//from w  w w . j a v a2 s  .  c  o m

    connection.setDoOutput(true);

    try {
        try {
            connection.connect();
        } catch (IOException ignored) {
        }

        if (method == PacketPlayOut.PacketType.POST) {
            DataOutputStream out = null;
            try {
                out = new DataOutputStream(connection.getOutputStream());
                if (data != null)
                    out.writeBytes(data);
                out.flush();
            } finally {
                if (out != null)
                    out.close();
            }
        }

        // ***  RESPONSE  ***

        int responseCode;
        boolean failed = false;

        try {
            responseCode = connection.getResponseCode();
        } catch (IOException e) {
            // HttpUrlConnection will throw an IOException if any 4XX
            // response is sent. If we request the status again, this
            // time the internal status will be properly set, and we'll be
            // able to retrieve it.
            // Thanks to Iigo.
            responseCode = connection.getResponseCode();
            failed = true;
        }

        BufferedReader in = null;
        String body = "";
        try {
            InputStream stream;
            try {
                stream = connection.getInputStream();
            } catch (IOException e) {
                // Same as before
                stream = connection.getErrorStream();
                failed = true;
            }

            in = new BufferedReader(new InputStreamReader(stream));
            StringBuilder responseBuilder = new StringBuilder();

            String inputLine;
            while ((inputLine = in.readLine()) != null) {
                responseBuilder.append(inputLine);
            }

            body = responseBuilder.toString();
        } finally {
            if (in != null)
                in.close();
        }

        HTTPResponse response = new HTTPResponse();
        response.setResponseCode(responseCode, failed);
        response.setResponseBody(body);

        int i = 0;
        String headerName, headerContent;
        while ((headerName = connection.getHeaderFieldKey(i)) != null) {
            headerContent = connection.getHeaderField(i);
            response.addHeader(headerName, headerContent);
        }

        // ***  REDIRECTION  ***

        switch (responseCode) {
        case 301:
        case 302:
        case 307:
        case 308:
            if (response.getHeaders().containsKey("Location")) {
                response = makeRequest(response.getHeaders().get("Location"), method, data);
            }
        }

        // ***  END  ***

        return response;
    } finally {
        connection.disconnect();
    }
}

---

From source file:Main.java

/**
 * Do an HTTP POST and return the data as a byte array.
 *//* w ww.  j a va  2  s  .  co m*/
public static byte[] executePost(String url, byte[] data, Map<String, String> requestProperties)
        throws MalformedURLException, IOException {
    HttpURLConnection urlConnection = null;
    try {
        urlConnection = (HttpURLConnection) new URL(url).openConnection();
        urlConnection.setRequestMethod("POST");
        urlConnection.setDoOutput(data != null);
        urlConnection.setDoInput(true);
        if (requestProperties != null) {
            for (Map.Entry<String, String> requestProperty : requestProperties.entrySet()) {
                urlConnection.setRequestProperty(requestProperty.getKey(), requestProperty.getValue());
            }
        }
        urlConnection.connect();
        if (data != null) {
            OutputStream out = new BufferedOutputStream(urlConnection.getOutputStream());
            out.write(data);
            out.close();
        }
        InputStream in = new BufferedInputStream(urlConnection.getInputStream());
        return convertInputStreamToByteArray(in);
    } catch (IOException e) {
        String details;
        if (urlConnection != null) {
            details = "; code=" + urlConnection.getResponseCode() + " (" + urlConnection.getResponseMessage()
                    + ")";
        } else {
            details = "";
        }
        Log.e("ExoplayerUtil", "executePost: Request failed" + details, e);
        throw e;
    } finally {
        if (urlConnection != null) {
            urlConnection.disconnect();
        }
    }
}

---

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

/**
 * /*from  ww w .  j a  v  a 2  s.  co  m*/
 *
 * @param media_id ?ID
 * @param identity 
 * @param filepath ?(????)
 * @return ?(???)error
 */
public static String downLoadMediaFile(String requestUrl, String media_id, String identity, String filepath) {
    String mediaLocalURL = "error";
    InputStream inputStream = null;
    FileOutputStream fileOutputStream = null;
    DataOutputStream dataOutputStream = null;
    try {
        URL downLoadURL = new URL(requestUrl);
        // URL
        HttpURLConnection connection = (HttpURLConnection) downLoadURL.openConnection();
        //?
        connection.setRequestMethod("GET");
        // 
        connection.connect();
        //?,?text,json
        if (connection.getContentType().equalsIgnoreCase("text/plain")) {
            // BufferedReader???URL?
            inputStream = connection.getInputStream();
            BufferedReader read = new BufferedReader(new InputStreamReader(inputStream, DEFAULT_CHARSET));
            String valueString = null;
            StringBuffer bufferRes = new StringBuffer();
            while ((valueString = read.readLine()) != null) {
                bufferRes.append(valueString);
            }
            inputStream.close();
            String errMsg = bufferRes.toString();
            JSONObject jsonObject = JSONObject.parseObject(errMsg);
            logger.error("???" + (jsonObject.getInteger("errcode")));
            mediaLocalURL = "error";
        } else {
            BufferedInputStream bis = new BufferedInputStream(connection.getInputStream());
            String ds = connection.getHeaderField("Content-disposition");
            //??
            String fullName = ds.substring(ds.indexOf("filename=\"") + 10, ds.length() - 1);
            //?--??
            String preffix = fullName.substring(0, fullName.lastIndexOf("."));
            //?
            String suffix = fullName.substring(preffix.length() + 1);
            //
            String length = connection.getHeaderField("Content-Length");
            //
            String type = connection.getHeaderField("Content-Type");
            //
            byte[] buffer = new byte[8192]; // 8k
            int count = 0;
            mediaLocalURL = filepath + File.separator;
            File file = new File(mediaLocalURL);
            if (!file.exists()) {
                file.mkdirs();
            }
            File mediaFile = new File(mediaLocalURL, fullName);
            fileOutputStream = new FileOutputStream(mediaFile);
            dataOutputStream = new DataOutputStream(fileOutputStream);
            while ((count = bis.read(buffer)) != -1) {
                dataOutputStream.write(buffer, 0, count);
            }
            //?
            mediaLocalURL += fullName;
            bis.close();
            dataOutputStream.close();
            fileOutputStream.close();
        }
    } catch (IOException e) {
        logger.error("?", e);
    }
    return mediaLocalURL;
}

---

From source file:com.mopaas_mobile.http.BaseHttpRequester.java

public static String doPOST(String urlstr, List<BasicNameValuePair> params) throws IOException {
    String result = null;// www  . j  a  v a  2s .c  om
    URL url = new URL(urlstr);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setDoOutput(true);
    connection.setDoInput(true);
    connection.setRequestMethod("POST");
    connection.setUseCaches(false);
    connection.setInstanceFollowRedirects(false);
    connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
    //       connection.setRequestProperty("token",token);
    connection.setConnectTimeout(30000);
    connection.setReadTimeout(30000);
    connection.connect();

    DataOutputStream out = new DataOutputStream(connection.getOutputStream());

    String content = "";
    if (params != null && params.size() > 0) {
        for (int i = 0; i < params.size(); i++) {
            content = content + "&" + URLEncoder.encode(((NameValuePair) params.get(i)).getName(), "UTF-8")
                    + "=" + URLEncoder.encode(((NameValuePair) params.get(i)).getValue(), "UTF-8");
        }
        out.writeBytes(content.substring(1));
    }

    out.flush();
    out.close();
    InputStream is = connection.getInputStream();
    BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8"));

    StringBuffer b = new StringBuffer();
    int ch;
    while ((ch = br.read()) != -1) {
        b.append((char) ch);
    }
    result = b.toString().trim();
    connection.disconnect();
    return result;
}

---

From source file:LNISmokeTest.java

/**
 * Implement WebDAV PUT http request./*from   w  w w.j ava  2 s .co  m*/
 * 
 * This might be simpler with a real HTTP client library, but
 * java.net.HttpURLConnection is part of the standard SDK and it
 * demonstrates the concepts.
 * 
 * @param lni the lni
 * @param collHandle the coll handle
 * @param packager the packager
 * @param source the source
 * @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 doPut(LNISoapServlet lni, String collHandle, String packager, String source,
        String endpoint)
        throws java.rmi.RemoteException, ProtocolException, IOException, FileNotFoundException {
    // assemble URL from chopped endpoint-URL and relative URI
    String collURI = doLookup(lni, collHandle, null);
    URL url = LNIClientUtils.makeDAVURL(endpoint, collURI, packager);
    System.err.println("DEBUG: PUT file=" + source + " to URL=" + url.toString());

    // connect with PUT method, then copy file over.
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("PUT");
    conn.setDoOutput(true);
    fixBasicAuth(url, conn);
    conn.connect();

    InputStream in = null;
    OutputStream out = null;
    try {
        in = new FileInputStream(source);
        out = conn.getOutputStream();
        copyStream(in, out);
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException e) {
                log.error("Unable to close input stream", e);
            }
        }

        if (out != null) {
            try {
                out.close();
            } catch (IOException e) {
                log.error("Unable to close output stream", e);
            }
        }
    }

    int status = conn.getResponseCode();
    if (status < 200 || status >= 300) {
        die(status, "HTTP error, status=" + String.valueOf(status) + ", message=" + conn.getResponseMessage());
    }

    // diagnostics, and get resulting new item's location if avail.
    System.err.println("DEBUG: sent " + source);
    System.err.println(
            "RESULT: Status=" + String.valueOf(conn.getResponseCode()) + " " + conn.getResponseMessage());
    String loc = conn.getHeaderField("Location");
    System.err.println("RESULT: Location=" + ((loc == null) ? "NULL!" : loc));
}

---

From source file:com.magnet.plugin.helpers.URLHelper.java

public static InputStream loadUrl(final String url) throws Exception {
    final InputStream[] inputStreams = new InputStream[] { null };
    final Exception[] exception = new Exception[] { null };
    Future<?> downloadThreadFuture = ApplicationManager.getApplication().executeOnPooledThread(new Runnable() {
        public void run() {
            try {
                HttpURLConnection connection;
                if (ApplicationManager.getApplication() != null) {
                    connection = HttpConfigurable.getInstance().openHttpConnection(url);
                } else {
                    connection = (HttpURLConnection) new URL(url).openConnection();
                    connection.setReadTimeout(Rest2MobileConstants.CONNECTION_TIMEOUT);
                    connection.setConnectTimeout(Rest2MobileConstants.CONNECTION_TIMEOUT);
                }/*from   w ww . j  a  v  a 2 s  .  co  m*/
                connection.connect();

                inputStreams[0] = connection.getInputStream();
            } catch (IOException e) {
                exception[0] = e;
            }
        }
    });

    try {
        downloadThreadFuture.get(5, TimeUnit.SECONDS);
    } catch (TimeoutException ignored) {
    }

    if (!downloadThreadFuture.isDone()) {
        downloadThreadFuture.cancel(true);
        throw new ConnectionException(IdeBundle.message("updates.timeout.error"));
    }

    if (exception[0] != null)
        throw exception[0];
    return inputStreams[0];
}

---

From source file:biz.mosil.webtools.MosilWeb.java

/**
 * ? InputStream//  w w w  .j a  v a  2 s. c  o  m
 * */
public static final InputStream getInputStream(final String _url) {
    InputStream result = null;

    try {
        URL url = new URL(_url);
        URLConnection conn = url.openConnection();

        if (!(conn instanceof HttpURLConnection)) {
            throw new IOException("This URL Can't Connect!");
        }

        HttpURLConnection httpConn = (HttpURLConnection) conn;
        //????
        httpConn.setAllowUserInteraction(false);
        //??
        httpConn.setInstanceFollowRedirects(true);
        httpConn.setRequestMethod("GET");
        httpConn.connect();

        final int response = httpConn.getResponseCode();

        if (response == HttpURLConnection.HTTP_OK) {
            result = httpConn.getInputStream();
        }

    } catch (MalformedURLException _ex) {
        Log.e("getInputStream", "Malformed URL Exception: " + _ex.toString());
    } catch (IOException _ex) {
        Log.e("getInputStream", "IO Exception: " + _ex.toString());
    }
    return result;
}

---

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