Example usage for java.net URL openConnection

Introduction

In this page you can find the example usage for java.net URL openConnection.

Prototype

public URLConnection openConnection() throws java.io.IOException 

Source Link

Document

Returns a java.net.URLConnection URLConnection instance that represents a connection to the remote object referred to by the URL .

Usage

From source file:PostTest.java

/**
 * Makes a POST request and returns the server response.
 * @param urlString the URL to post to//  w  ww.  ja  va  2s .c o m
 * @param nameValuePairs a map of name/value pairs to supply in the request.
 * @return the server reply (either from the input stream or the error stream)
 */
public static String doPost(String urlString, Map<String, String> nameValuePairs) throws IOException {
    URL url = new URL(urlString);
    URLConnection connection = url.openConnection();
    connection.setDoOutput(true);

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

    boolean first = true;
    for (Map.Entry<String, String> pair : nameValuePairs.entrySet()) {
        if (first)
            first = false;
        else
            out.print('&');
        String name = pair.getKey();
        String value = pair.getValue();
        out.print(name);
        out.print('=');
        out.print(URLEncoder.encode(value, "UTF-8"));
    }

    out.close();

    Scanner in;
    StringBuilder response = new StringBuilder();
    try {
        in = new Scanner(connection.getInputStream());
    } catch (IOException e) {
        if (!(connection instanceof HttpURLConnection))
            throw e;
        InputStream err = ((HttpURLConnection) connection).getErrorStream();
        if (err == null)
            throw e;
        in = new Scanner(err);
    }

    while (in.hasNextLine()) {
        response.append(in.nextLine());
        response.append("\n");
    }

    in.close();
    return response.toString();
}

---

From source file:com.blogspot.ryanfx.auth.GoogleUtil.java

/**
 * Sends the auth token to google and gets the json result.
 * @param token auth token//from w  w  w  .  java  2  s.  c  o  m
 * @return json result if valid request, null if invalid.
 * @throws IOException
 * @throws LoginException
 */
private static String issueTokenGetRequest(String token) throws IOException, LoginException {
    int timeout = 2000;
    URL u = new URL("https://www.googleapis.com/oauth2/v2/userinfo");
    HttpURLConnection c = (HttpURLConnection) u.openConnection();
    c.setRequestMethod("GET");
    c.setRequestProperty("Content-length", "0");
    c.setRequestProperty("Authorization", "OAuth " + token);
    c.setUseCaches(false);
    c.setAllowUserInteraction(false);
    c.setConnectTimeout(timeout);
    c.setReadTimeout(timeout);
    c.connect();
    int status = c.getResponseCode();
    if (status == HttpServletResponse.SC_OK) {
        BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = br.readLine()) != null) {
            sb.append(line + "\n");
        }
        br.close();
        return sb.toString();
    } else if (status == HttpServletResponse.SC_UNAUTHORIZED) {
        Logger.getLogger(GoogleUtil.class.getName()).severe("Invalid token request: " + token);
    }
    return null;
}

---

From source file:javaphpmysql.JavaPHPMySQL.java

public static void sendGet() {
    //Creamos un objeto JSON
    JSONObject jsonObj = new JSONObject();
    //Aadimos el nombre, apellidos y email del usuario
    jsonObj.put("nombre", nombre);
    jsonObj.put("apellidos", apellidos);
    jsonObj.put("email", email);
    //Creamos una lista para almacenar el JSON
    List l = new LinkedList();
    l.addAll(Arrays.asList(jsonObj));
    //Generamos el String JSON
    String jsonString = JSONValue.toJSONString(l);
    System.out.println("JSON GENERADO:");
    System.out.println(jsonString);
    System.out.println("");

    try {//from  w  w w .java 2s  .c o m
        //Codificar el json a URL
        jsonString = URLEncoder.encode(jsonString, "UTF-8");
        //Generar la URL
        String url = SERVER_PATH + "listenGet.php?json=" + jsonString;
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();

        // optional default is GET
        con.setRequestMethod("GET");

        //add request header
        con.setRequestProperty("User-Agent", USER_AGENT);

        int responseCode = con.getResponseCode();
        System.out.println("\nSending 'GET' request to URL : " + url);
        System.out.println("Response Code : " + responseCode);

        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        //print result
        System.out.println(response.toString());
    } catch (Exception e) {
        e.printStackTrace();
    }
}

---

From source file:Main.java

private static void downloadResource(String from, String to) {
    OutputStream outputStream = null;
    BufferedInputStream inputStream = null;
    HttpURLConnection connection = null;
    URL url;
    byte[] buffer = new byte[1024];

    try {//from w  w  w  .  j  ava 2 s .c  o  m
        url = new URL(from);

        connection = (HttpURLConnection) url.openConnection();

        connection.setRequestMethod("GET");
        connection.setDoOutput(true);
        connection.connect();
        outputStream = new FileOutputStream(to);

        inputStream = new BufferedInputStream(url.openStream());
        int read;

        while ((read = inputStream.read(buffer)) > 0) {
            outputStream.write(buffer, 0, read);
        }

    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (outputStream != null)
            try {
                outputStream.close();
            } catch (IOException e) {
            }
        if (inputStream != null)
            try {
                inputStream.close();
            } catch (IOException e) {
            }
        if (connection != null)
            connection.disconnect();
    }
}

---

From source file:Bing.java

/**
 *
 * @param query - query to use for the search
 * @return - a json array of results. each contains a title, description, url,
 * and some other metadata that can be easily extracted since its in json format
 *///ww  w  .ja  va2s  . c om
public static JSONArray search(String query) {
    try {
        query = "'" + query + "'";
        String encodedQuery = URLEncoder.encode(query, "UTF-8");
        System.out.println(encodedQuery);
        //            URL url = new URL("https://api.datamarket.azure.com/Bing/Search/v1/Composite?Sources=%27web%27&Query=%27car%27");
        //            URL url = new URL("http://csb.stanford.edu/class/public/pages/sykes_webdesign/05_simple.html");
        String webPage = "https://api.datamarket.azure.com/Bing/Search/v1/Composite?Sources=%27web%27&Query="
                + encodedQuery + "&$format=JSON";
        String name = "6604d12c-3e89-4859-8013-3132f78c1595";
        String password = "cefgNRl3OL4PrJJvssxkqLw0VKfYNCgyTe8wNXotUmQ";

        String authString = name + ":" + password;
        System.out.println("auth string: " + authString);
        byte[] authEncBytes = Base64.encodeBase64(authString.getBytes());
        String authStringEnc = new String(authEncBytes);
        System.out.println("Base64 encoded auth string: " + authStringEnc);

        URL url = new URL(webPage);
        URLConnection urlConnection = url.openConnection();
        urlConnection.setRequestProperty("Authorization", "Basic " + authStringEnc);

        BufferedReader in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
        String inputLine;
        StringBuilder response = new StringBuilder();

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

        in.close();
        JSONParser parser = new JSONParser();
        JSONArray arr = (JSONArray) ((JSONObject) ((JSONObject) parser.parse(response.toString())).get("d"))
                .get("results");
        JSONObject obj = (JSONObject) arr.get(0);
        JSONArray out = (JSONArray) obj.get("Web");

        return out;

        //

    } catch (MalformedURLException ex) {
        Logger.getLogger(Bing.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException ex) {
        Logger.getLogger(Bing.class.getName()).log(Level.SEVERE, null, ex);
    } catch (ParseException ex) {
        Logger.getLogger(Bing.class.getName()).log(Level.SEVERE, null, ex);
    }
    return null;
}

---

From source file:com.leosys.core.utils.HttpServiceImpl.java

public static String getZiku(String domin) {
    Properties p = new Properties();
    String urls = getXmlPath();// w  w w  .ja  v a  2  s  .  co  m
    try {
        p.load(new FileInputStream(urls));
    } catch (Exception e) {
        e.printStackTrace();
    }
    String subUrl = p.getProperty("path");
    String restUrl = subUrl + "model=myservice&action=getwebsiteziku&domain=" + domin + "&pagesize=1000";
    StringBuffer strBuf;
    strBuf = new StringBuffer();

    try {
        URL url = new URL(restUrl);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("POST");

        BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));//?  
        String line = null;
        while ((line = reader.readLine()) != null)
            strBuf.append(line + " ");
        reader.close();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    System.out.println(strBuf.toString());

    return strBuf.toString();
}

---

From source file:com.memetix.gun4j.GunshortenAPI.java

protected static JSONObject post(final String serviceUrl, final String paramsString) throws Exception {
    final URL url = new URL(serviceUrl);
    final HttpURLConnection uc = (HttpURLConnection) url.openConnection();
    if (referrer != null)
        uc.setRequestProperty("referer", referrer);

    uc.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=" + ENCODING);
    uc.setRequestProperty("Accept-Charset", ENCODING);
    uc.setRequestMethod("POST");
    uc.setDoOutput(true);/*from  www.  java  2s.c  o  m*/

    final PrintWriter pw = new PrintWriter(uc.getOutputStream());
    pw.write(paramsString);
    pw.close();
    uc.getOutputStream().close();

    try {
        final int responseCode = uc.getResponseCode();
        final String result = inputStreamToString(uc.getInputStream());
        if (responseCode != 200) {
            throw new Exception("Error from Gunshorten API: " + result);
        }
        return parseJSON(result);
    } finally {
        uc.getInputStream().close();
        if (uc.getErrorStream() != null) {
            uc.getErrorStream().close();
        }
    }
}

---

From source file:Main.java

public static boolean isConnectionAvailable() {
    class NetworkCheckTask extends AsyncTask<Void, Void, Boolean> {

        @Override/* w w w  . ja va  2s  .co  m*/
        protected Boolean doInBackground(Void... params) {
            try {
                URL url = new URL(MAD_SERVER + "/sync.html");
                HttpURLConnection conn = null;
                conn = (HttpURLConnection) url.openConnection();
                conn.setConnectTimeout(999);
                conn.setRequestMethod("GET");
                conn.setDoInput(true);
                conn.connect();
                if (conn.getResponseCode() == 200)
                    return true;
                else
                    return false;
            } catch (Exception e) {
                return false;
            }
        }

    }

    try {
        NetworkCheckTask async = new NetworkCheckTask();
        async.execute();
        return async.get();
    } catch (Exception e) {
        return false;
    }
}

---

From source file:Main.java

@SuppressWarnings("SameParameterValue")
public static Bitmap fetchAndRescaleBitmap(String uri, int width, int height) throws IOException {
    URL url = new URL(uri);
    BufferedInputStream is = null;
    try {/*  w  w  w .  j  av  a  2 s. c  o m*/
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        is = new BufferedInputStream(urlConnection.getInputStream());
        is.mark(MAX_READ_LIMIT_PER_IMG);
        int scaleFactor = findScaleFactor(width, height, is);
        is.reset();
        return scaleBitmap(scaleFactor, is);
    } finally {
        if (is != null) {
            is.close();
        }
    }
}

---

From source file:com.gmt2001.HttpRequest.java

public static HttpResponse getData(RequestType type, String url, String post, HashMap<String, String> headers) {
    Thread.setDefaultUncaughtExceptionHandler(com.gmt2001.UncaughtExceptionHandler.instance());

    HttpResponse r = new HttpResponse();

    r.type = type;/*ww  w .  j  a  v  a2 s  .c  o  m*/
    r.url = url;
    r.post = post;
    r.headers = headers;

    try {
        URL u = new URL(url);

        HttpURLConnection h = (HttpURLConnection) u.openConnection();

        for (Entry<String, String> e : headers.entrySet()) {
            h.addRequestProperty(e.getKey(), e.getValue());
        }

        h.setRequestMethod(type.name());
        h.setUseCaches(false);
        h.setDefaultUseCaches(false);
        h.setConnectTimeout(timeout);
        h.setRequestProperty("User-Agent",
                "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.52 Safari/537.36 PhantomBotJ/2015");
        if (!post.isEmpty()) {
            h.setDoOutput(true);
        }

        h.connect();

        if (!post.isEmpty()) {
            BufferedOutputStream stream = new BufferedOutputStream(h.getOutputStream());
            stream.write(post.getBytes());
            stream.flush();
            stream.close();
        }

        if (h.getResponseCode() < 400) {
            r.content = IOUtils.toString(new BufferedInputStream(h.getInputStream()), h.getContentEncoding());
            r.httpCode = h.getResponseCode();
            r.success = true;
        } else {
            r.content = IOUtils.toString(new BufferedInputStream(h.getErrorStream()), h.getContentEncoding());
            r.httpCode = h.getResponseCode();
            r.success = false;
        }
    } catch (IOException ex) {
        r.success = false;
        r.httpCode = 0;
        r.exception = ex.getMessage();

        com.gmt2001.Console.err.printStackTrace(ex);
    }

    return r;
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• »