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:Main.java

/**
 * Given a string url, connects and returns response code
 *
 * @param urlString       string to fetch
 * @param readTimeOutMs       read time out
 * @param connectionTimeOutMs       connection time out
 * @param urlRedirect       should use urlRedirect
 * @param useCaches       should use cache
 * @return httpResponseCode http response code
 * @throws IOException//from  w ww .ja v a  2 s .c  o  m
 */

public static int checkUrlWithOptions(String urlString, int readTimeOutMs, int connectionTimeOutMs,
        boolean urlRedirect, boolean useCaches) throws IOException {
    URL url = new URL(urlString);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setReadTimeout(readTimeOutMs /* milliseconds */);
    connection.setConnectTimeout(connectionTimeOutMs /* milliseconds */);
    connection.setRequestMethod("GET");
    connection.setInstanceFollowRedirects(urlRedirect);
    connection.setUseCaches(useCaches);
    // Starts the query
    connection.connect();
    int responseCode = connection.getResponseCode();
    connection.disconnect();
    return responseCode;
}

---

From source file:com.mk4droid.IMC_Services.Download_Data.java

/**
 * Download Image from a certain url//  w w  w . ja v  a 2 s  .com
 * 
 * @param fullPath the url of the image
 * @return
 */
public static byte[] Down_Image(String fullPath) {

    try {
        //----- Split----
        String[] AllInfo = fullPath.split("/");

        // Encode filename as UTF8 -------
        String fnExt = AllInfo[AllInfo.length - 1];

        String fnExt_UTF8 = URLEncoder.encode(fnExt, "UTF-8");

        //- Replace new fn to old
        AllInfo[AllInfo.length - 1] = fnExt_UTF8;

        //------ Concatenate to a single string -----
        String newfullPath = AllInfo[0];
        for (int i = 1; i < AllInfo.length; i++)
            newfullPath += "/" + AllInfo[i];

        // empty space becomes + after UTF8, then replace with %20
        newfullPath = newfullPath.replace("+", "%20");

        //------------ Download -------------
        URL myFileUrl = new URL(newfullPath);

        HttpURLConnection conn = (HttpURLConnection) myFileUrl.openConnection();
        conn.setDoInput(true);
        conn.setConnectTimeout(10000);
        conn.connect();
        InputStream isBitmap = conn.getInputStream();
        return readBytes(isBitmap);

    } catch (Exception e) {
        Log.e(Constants_API.TAG, "Download_Data: Down_Image: Error in http connection " + e.getMessage());
        return null;
    }

}

---

From source file:Main.java

public static String getHtml(String getUrl, String charsetName) {
    String html = "";
    URL url;/* w ww  . j a v a 2  s.co  m*/
    try {
        url = new URL(getUrl);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestProperty("User-Agent", userAgent);
        connection.setRequestProperty("Connection", "Keep-Alive");
        connection.setRequestProperty("Cache-Control", "no-cache");
        connection.setReadTimeout(timeout);
        connection.setFollowRedirects(true);
        connection.connect();
        InputStream inStrm = connection.getInputStream();

        BufferedReader br = new BufferedReader(new InputStreamReader(inStrm, charsetName));
        String temp = "";

        while ((temp = br.readLine()) != null) {
            html = html + (temp + '\n');
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return html;
}

---

From source file:hudson.Main.java

/**
 * Run command and send result to {@code ExternalJob} in the {@code external-monitor-job} plugin.
 * Obsoleted by {@code SetExternalBuildResultCommand} but kept here for compatibility.
 *//*w w  w.j a  v  a 2 s  .  co m*/
public static int remotePost(String[] args) throws Exception {
    String projectName = args[0];

    String home = getHudsonHome();
    if (!home.endsWith("/"))
        home = home + '/'; // make sure it ends with '/'

    // check for authentication info
    String auth = new URL(home).getUserInfo();
    if (auth != null)
        auth = "Basic " + new Base64Encoder().encode(auth.getBytes("UTF-8"));

    {// check if the home is set correctly
        HttpURLConnection con = open(new URL(home));
        if (auth != null)
            con.setRequestProperty("Authorization", auth);
        con.connect();
        if (con.getResponseCode() != 200 || con.getHeaderField("X-Hudson") == null) {
            System.err.println(home + " is not Hudson (" + con.getResponseMessage() + ")");
            return -1;
        }
    }

    URL jobURL = new URL(home + "job/" + Util.encode(projectName).replace("/", "/job/") + "/");

    {// check if the job name is correct
        HttpURLConnection con = open(new URL(jobURL, "acceptBuildResult"));
        if (auth != null)
            con.setRequestProperty("Authorization", auth);
        con.connect();
        if (con.getResponseCode() != 200) {
            System.err.println(jobURL + " is not a valid external job (" + con.getResponseCode() + " "
                    + con.getResponseMessage() + ")");
            return -1;
        }
    }

    // get a crumb to pass the csrf check
    String crumbField = null, crumbValue = null;
    try {
        HttpURLConnection con = open(
                new URL(home + "crumbIssuer/api/xml?xpath=concat(//crumbRequestField,\":\",//crumb)'"));
        if (auth != null)
            con.setRequestProperty("Authorization", auth);
        String line = IOUtils.readFirstLine(con.getInputStream(), "UTF-8");
        String[] components = line.split(":");
        if (components.length == 2) {
            crumbField = components[0];
            crumbValue = components[1];
        }
    } catch (IOException e) {
        // presumably this Hudson doesn't use CSRF protection
    }

    // write the output to a temporary file first.
    File tmpFile = File.createTempFile("jenkins", "log");
    try {
        int ret;
        try (OutputStream os = Files.newOutputStream(tmpFile.toPath());
                Writer w = new OutputStreamWriter(os, "UTF-8")) {
            w.write("<?xml version='1.1' encoding='UTF-8'?>");
            w.write("<run><log encoding='hexBinary' content-encoding='" + Charset.defaultCharset().name()
                    + "'>");
            w.flush();

            // run the command
            long start = System.currentTimeMillis();

            List<String> cmd = new ArrayList<String>();
            for (int i = 1; i < args.length; i++)
                cmd.add(args[i]);
            Proc proc = new Proc.LocalProc(cmd.toArray(new String[0]), (String[]) null, System.in,
                    new DualOutputStream(System.out, new EncodingStream(os)));

            ret = proc.join();

            w.write("</log><result>" + ret + "</result><duration>" + (System.currentTimeMillis() - start)
                    + "</duration></run>");
        } catch (InvalidPathException e) {
            throw new IOException(e);
        }

        URL location = new URL(jobURL, "postBuildResult");
        while (true) {
            try {
                // start a remote connection
                HttpURLConnection con = open(location);
                if (auth != null)
                    con.setRequestProperty("Authorization", auth);
                if (crumbField != null && crumbValue != null) {
                    con.setRequestProperty(crumbField, crumbValue);
                }
                con.setDoOutput(true);
                // this tells HttpURLConnection not to buffer the whole thing
                con.setFixedLengthStreamingMode((int) tmpFile.length());
                con.connect();
                // send the data
                try (InputStream in = Files.newInputStream(tmpFile.toPath())) {
                    org.apache.commons.io.IOUtils.copy(in, con.getOutputStream());
                } catch (InvalidPathException e) {
                    throw new IOException(e);
                }

                if (con.getResponseCode() != 200) {
                    org.apache.commons.io.IOUtils.copy(con.getErrorStream(), System.err);
                }

                return ret;
            } catch (HttpRetryException e) {
                if (e.getLocation() != null) {
                    // retry with the new location
                    location = new URL(e.getLocation());
                    continue;
                }
                // otherwise failed for reasons beyond us.
                throw e;
            }
        }
    } finally {
        tmpFile.delete();
    }
}

---

From source file:com.easy.facebook.android.util.Util.java

public static byte[] loadPicture(String urlPicture) {
    byte[] pictureData = null;

    try {/*  w  w w  .  ja  v  a2 s. c om*/
        URL uploadFileUrl = null;
        try {
            uploadFileUrl = new URL(urlPicture);
        } catch (Exception e) {
            e.printStackTrace();
        }

        HttpURLConnection conn = (HttpURLConnection) uploadFileUrl.openConnection();
        conn.setDoInput(true);
        conn.connect();
        InputStream fis = null;
        try {
            fis = conn.getInputStream();
        } catch (IOException e) {

            e.printStackTrace();
        }
        Bitmap bi = BitmapFactory.decodeStream(fis);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bi.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        pictureData = baos.toByteArray();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {

        e.printStackTrace();
    }

    return pictureData;
}

---

From source file:com.wisdombud.right.client.common.HttpKit.java

/**
 * Send GET request/*ww w.j av a2  s.  c  om*/
 */
public static String get(String url, Map<String, String> queryParas, Map<String, String> headers) {
    HttpURLConnection conn = null;
    try {
        conn = getHttpConnection(buildUrlWithQueryString(url, queryParas), GET, headers);
        conn.connect();
        return readResponseString(conn);
    } catch (final Exception e) {
        throw new RuntimeException(e);
    } finally {
        if (conn != null) {
            conn.disconnect();
        }
    }
}

---

From source file:com.uksf.mf.core.utility.ClassNames.java

/**
 * Checks if connection to URL can be established
 * @param url url to check/*from   w w  w. j ava2s . com*/
 * @return connection state
 * @throws IOException error
 */
private static boolean checkConnection(URL url) throws IOException {
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("GET");
    connection.setConnectTimeout(1500);
    connection.setReadTimeout(1500);
    connection.setRequestProperty("User-Agent",
            "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)");
    connection.connect();
    return connection.getResponseCode() == 404;
}

---

From source file:com.wisdombud.right.client.common.HttpKit.java

/**
 * Send POST request/*from  w  w  w  .j  a v a  2 s  .  c  om*/
 */
public static String post(String url, Map<String, String> queryParas, String data,
        Map<String, String> headers) {
    HttpURLConnection conn = null;
    try {
        conn = getHttpConnection(buildUrlWithQueryString(url, queryParas), POST, headers);
        conn.connect();

        final OutputStream out = conn.getOutputStream();
        out.write(data != null ? data.getBytes(CHARSET) : null);
        out.flush();
        out.close();

        return readResponseString(conn);
    } catch (final Exception e) {
        throw new RuntimeException(e);
    } finally {
        if (conn != null) {
            conn.disconnect();
        }
    }
}

---

From source file:Main.java

/**
 * Make an HTTP request to the given URL and return a String as the response.
 *//* w ww. j  a v a  2  s .c o m*/
private static String makeHttpRequest(URL url) throws IOException {
    String jsonResponse = "";

    // If the URL is null, then return early.
    if (url == null) {
        return jsonResponse;
    }

    HttpURLConnection urlConnection = null;
    InputStream inputStream = null;
    try {
        urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setReadTimeout(10000 /* milliseconds */);
        urlConnection.setConnectTimeout(15000 /* milliseconds */);
        urlConnection.setRequestMethod("GET");
        urlConnection.connect();

        /*
        If the request was successful (response code 200),
        then read the input stream and parse the response.
         */
        if (urlConnection.getResponseCode() == 200) {
            inputStream = urlConnection.getInputStream();
            jsonResponse = readFromStream(inputStream);
        } else {
            //handle exception
        }
    } catch (IOException e) {
        //handle exception
    } finally {
        if (urlConnection != null) {
            urlConnection.disconnect();
        }
        if (inputStream != null) {
            inputStream.close();
        }
    }
    return jsonResponse;
}

---

From source file:Main.java

/**
 * Given a string url, connects and returns response code
 *
 * @param urlString       string to fetch
 * @param network       network/*from   ww  w . j  a  va2 s .co  m*/
 * @param readTimeOutMs       read time out
 * @param connectionTimeOutMs       connection time out
 * @param urlRedirect       should use urlRedirect
 * @param useCaches       should use cache
 * @return httpResponseCode http response code
 * @throws IOException
 */

@TargetApi(LOLLIPOP)
public static int checkUrlWithOptionsOverNetwork(String urlString, Network network, int readTimeOutMs,
        int connectionTimeOutMs, boolean urlRedirect, boolean useCaches) throws IOException {
    if (network == null) {
        return -1;
    }
    URL url = new URL(urlString);
    HttpURLConnection connection = (HttpURLConnection) network.openConnection(url);
    connection.setReadTimeout(readTimeOutMs /* milliseconds */);
    connection.setConnectTimeout(connectionTimeOutMs /* milliseconds */);
    connection.setRequestMethod("GET");
    connection.setInstanceFollowRedirects(urlRedirect);
    connection.setUseCaches(useCaches);
    // Starts the query
    connection.connect();
    int responseCode = connection.getResponseCode();
    connection.disconnect();
    return responseCode;
}

---

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