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:pushandroid.POST2GCM.java

public static void post(Content content) {

    try {//from   w w w  .j ava2 s  .  c  om

        // 1. URL
        URL url = new URL(URL);

        // 2. Open connection
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();

        // 3. Specify POST method
        conn.setRequestMethod("POST");

        // 4. Set the headers
        conn.setRequestProperty("Content-Type", "application/json");
        conn.setRequestProperty("Authorization", "key=" + apiKey);

        conn.setDoOutput(true);

        // 5. Add JSON data into POST request body
        //`5.1 Use Jackson object mapper to convert Contnet object into JSON
        ObjectMapper mapper = new ObjectMapper();

        // 5.2 Get connection output stream
        DataOutputStream wr = new DataOutputStream(conn.getOutputStream());

        // 5.3 Copy Content "JSON" into
        mapper.writeValue(wr, content);

        // 5.4 Send the request
        wr.flush();

        // 5.5 close
        wr.close();

        // 6. Get the response
        int responseCode = conn.getResponseCode();
        System.out.println("\nSending 'POST' request to URL : " + url);
        System.out.println("Response Code : " + responseCode);

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

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

        // 7. Print result
        System.out.println(response.toString());

    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

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From source file:com.asual.lesscss.ResourceUtils.java

public static byte[] readBinaryUrl(URL source) throws IOException {
    byte[] result;
    try {//from w  w w  .  j ava  2s .  c  o  m
        URLConnection urlc = source.openConnection();
        ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
        InputStream input = urlc.getInputStream();
        try {
            byte[] buffer = new byte[1024];
            int bytesRead = -1;
            while ((bytesRead = input.read(buffer)) != -1) {
                byteStream.write(buffer, 0, bytesRead);
            }
            result = byteStream.toByteArray();
        } finally {
            byteStream.close();
            input.close();
        }
    } catch (IOException e) {
        logger.error("Can't read '" + source.getFile() + "'.");
        throw e;
    }
    return result;
}

---

From source file:com.microsoft.azure.engagement.ws.VideoParser.java

/**
 * Method that returns the result object
 *
 * @param urlString The url to parse/* w  w w  . java2  s .c o m*/
 * @return The result object
 */
private static final JSONObject getJsonObject(String urlString) {
    Log.d(VideoParser.TAG, "Parse URL: " + urlString);

    InputStream inputStream = null;

    try {
        final URL url = new URL(urlString);
        final URLConnection urlConnection = url.openConnection();

        inputStream = new BufferedInputStream(urlConnection.getInputStream());
        final BufferedReader reader = new BufferedReader(
                new InputStreamReader(urlConnection.getInputStream(), "utf-8"), 8);
        final StringBuilder sb = new StringBuilder();

        String line;
        while ((line = reader.readLine()) != null) {
            sb.append(line);
        }
        final String json = sb.toString();
        return new JSONObject(json);
    } catch (Exception e) {
        Log.w(VideoParser.TAG, "Failed to parse the json for media list", e);
        return null;
    } finally {
        if (inputStream != null) {
            try {
                inputStream.close();
            } catch (IOException e) {
                Log.w(VideoParser.TAG, "JSON feed closed", e);
            }
        }
    }

}

---

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

public static String doPOST(String urlstr, List<BasicNameValuePair> params) throws IOException {
    String result = null;/*from   w  w w. ja va  2  s. co m*/
    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:Main.java

public static void server2mobile(Context context, String type) {

    String serverPath = "http://shaunrain.zicp.net/FileUp/QueryServlet?type=" + type;
    try {/*from   w  ww .j  a  v  a2  s .c  om*/
        URL url = new URL(serverPath);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setConnectTimeout(10000);
        conn.setRequestMethod("GET");

        int code = conn.getResponseCode();
        Log.d("code", code + "");
        if (code == 200) {
            InputStream is = conn.getInputStream();

            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            int len = 0;
            byte[] buffer = new byte[1024];

            while ((len = is.read(buffer)) != -1) {
                baos.write(buffer, 0, len);
            }
            is.close();
            conn.disconnect();

            String result = new String(baos.toByteArray());
            String[] results = result.split("[$]");
            for (String r : results) {
                if (r.length() != 0) {
                    URL json = new URL(r);
                    HttpURLConnection con = (HttpURLConnection) json.openConnection();
                    con.setConnectTimeout(5000);
                    con.setRequestMethod("GET");
                    int co = con.getResponseCode();
                    if (co == 200) {
                        File jsonFile;
                        if (r.endsWith("clear.json")) {
                            jsonFile = new File(
                                    Environment.getExternalStorageDirectory() + "/traffic_json/clear.json");
                        } else if (r.endsWith("crowd.json")) {
                            jsonFile = new File(
                                    Environment.getExternalStorageDirectory() + "/traffic_json/crowd.json");
                        } else if (r.endsWith("trouble.json")) {
                            jsonFile = new File(
                                    Environment.getExternalStorageDirectory() + "/traffic_json/trouble.json");
                        } else {
                            jsonFile = new File(
                                    Environment.getExternalStorageDirectory() + "/traffic_json/control.json");
                        }

                        if (jsonFile.exists())
                            jsonFile.delete();
                        jsonFile.createNewFile();
                        try (BufferedReader reader = new BufferedReader(
                                new InputStreamReader(con.getInputStream(), "gb2312"));
                                BufferedWriter writer = new BufferedWriter(new FileWriter(jsonFile));) {
                            String line = null;
                            while ((line = reader.readLine()) != null) {
                                writer.write(line);
                            }
                        }

                    }
                    con.disconnect();
                }
            }

        }

    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

}

---

From source file:ilearnrw.utils.ServerHelperClass.java

public static String sendPost(String link, String urlParameters) throws Exception {
    String url = baseUrl + link;// w w  w  .  ja  v  a2s .c  o  m

    URL obj = new URL(url);
    HttpURLConnection con = (HttpURLConnection) obj.openConnection();

    con.setRequestMethod("POST");
    con.setRequestProperty("Authorization", userNamePasswordBase64("api", "api"));

    con.setRequestProperty("Content-Type", "application/json;charset=utf-8");
    con.setDoOutput(true);
    OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream(), "UTF8");

    wr.write(urlParameters);
    wr.flush();
    wr.close();
    int responseCode = con.getResponseCode();
    System.out.println("\nSending 'POST' request to URL : " + url);
    System.out.println("Post parameters : " + urlParameters);
    System.out.println("Response Code : " + responseCode);

    BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream(), "UTF-8"));
    String inputLine;
    StringBuffer response = new StringBuffer();

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

    return response.toString();
}

---

From source file:massbank.svn.MSDBUpdateUtil.java

/**
 *
 *///from www .  jav a2  s .c om
public static boolean updateSubStructData(String serverUrl) {
    boolean ret = true;
    String cgiUrl = serverUrl + "cgi-bin/GenSubstructure.cgi";
    try {
        URL url = new URL(cgiUrl);
        HttpURLConnection con = (HttpURLConnection) url.openConnection();
        con.setConnectTimeout(10 * 1000);
        con.setReadTimeout(60 * 1000);
        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String line = "";
        StringBuilder res = new StringBuilder();
        while ((line = in.readLine()) != null) {
            res.append(line);
        }
        if (res.indexOf("OK") == -1) {
            ret = false;
        }
    } catch (IOException e) {
        e.printStackTrace();
        ret = false;
    }
    return ret;
}

---

From source file:com.facebook.fresco.sample.urlsfetcher.ImageUrlsFetcher.java

@Nullable
private static String downloadContentAsString(String urlString) throws IOException {
    InputStream is = null;/*www.  ja  v  a  2s. c  o  m*/
    try {
        URL url = new URL(urlString);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestProperty("Authorization", IMGUR_CLIENT_ID);
        conn.setReadTimeout(10000 /* milliseconds */);
        conn.setConnectTimeout(15000 /* milliseconds */);
        conn.setRequestMethod("GET");
        conn.setDoInput(true);
        // Starts the query
        conn.connect();
        int response = conn.getResponseCode();
        if (response != HttpStatus.SC_OK) {
            FLog.e(TAG, "Album request returned %s", response);
            return null;
        }
        is = conn.getInputStream();
        return readAsString(is);
    } finally {
        if (is != null) {
            is.close();
        }
    }
}

---

From source file:be.solidx.hot.utils.IOUtils.java

public static InputStream loadResourceNoCache(URL path) throws IOException {
    URLConnection resConn = path.openConnection();
    // !!! needed to avoid jvm resource catching
    resConn.setUseCaches(false);//w  w  w.  j  a  v  a  2  s. c o  m
    return resConn.getInputStream();
}

---

From source file:mdretrieval.FileFetcher.java

public static InputStream fetchFileFromUrl(String urlString) {

    InputStream inputStream = null;

    Proxy proxy = ServerConstants.isProxyEnabled
            ? new Proxy(Proxy.Type.HTTP, new InetSocketAddress(ServerConstants.hostname, ServerConstants.port))
            : Proxy.NO_PROXY;/*  w  w w  .j a  v  a  2  s .  c  o  m*/

    URL url;
    try {
        url = new URL(urlString);
        url.openConnection();

        if (proxy != Proxy.NO_PROXY && proxy.type() != Proxy.Type.DIRECT) {
            inputStream = url.openConnection(proxy).getInputStream();
        } else {
            inputStream = url.openConnection().getInputStream();
        }
    } catch (MalformedURLException e) {
        GUIrefs.displayAlert("Invalid URL " + urlString + "- \\n malformed expression");
        e.printStackTrace();
        inputStream = null;
    } catch (IOException ioe) {
        GUIrefs.displayAlert("Cannot read from " + StringUtilities.escapeQuotes(urlString) + "- IOException");
        ioe.printStackTrace();
        inputStream = null;
    }

    return inputStream;
}

---

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