Example usage for java.net HttpURLConnection getInputStream

Introduction

In this page you can find the example usage for java.net HttpURLConnection getInputStream.

Prototype

public InputStream getInputStream() throws IOException 

Source Link

Document

Returns an input stream that reads from this open connection.

Usage

From source file:Authentication.DinserverAuth.java

public static boolean Login(String nick, String pass, Socket socket) throws IOException {
    boolean logged = false;

    JSONObject authRequest = new JSONObject();
    authRequest.put("username", nick);
    authRequest.put("auth_id", pass);

    String query = "http://127.0.0.1:5000/token";

    URL url = new URL(query);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setConnectTimeout(5000);// w w  w.j ava2 s  .co m
    conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
    conn.setDoOutput(true);
    conn.setDoInput(true);
    conn.setRequestMethod("POST");

    OutputStream os = conn.getOutputStream();
    os.write(authRequest.toString().getBytes(Charset.forName("UTF-8")));
    os.close();
    String output = new String();
    StringBuilder sb = new StringBuilder();
    int HttpResult = conn.getResponseCode();
    if (HttpResult == HttpURLConnection.HTTP_OK) {
        output = IOUtils.toString(new InputStreamReader(conn.getInputStream(), Charset.forName("UTF-8")));
    } else {
        System.out.println(conn.getResponseMessage());
    }

    JSONObject jsonObject = new JSONObject(output);
    logged = jsonObject.getBoolean("ok");

    conn.disconnect();

    if (logged) {
        if (DinserverMaster.addUser(nick, socket)) {
            System.out.println("User " + nick + " logged in");
        } else {
            logged = false;
        }
    }
    return logged;
}

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From source file:eu.eexcess.ddb.recommender.PartnerConnector.java

/**
 * Opens a HTTP connection, gets the response and converts into to a String.
 * //from   w ww .  j  a v a  2s .  c o  m
 * @param urlStr Servers URL
 * @param properties Keys and values for HTTP request properties
 * @return Servers response
 * @throws IOException  If connection could not be established or response code is !=200
 */
public static String httpGet(String urlStr, HashMap<String, String> properties) throws IOException {
    if (properties == null) {
        properties = new HashMap<String, String>();
    }
    // open HTTP connection with URL
    URL url = new URL(urlStr);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    // set properties if any do exist
    for (String key : properties.keySet()) {
        conn.setRequestProperty(key, properties.get(key));
    }
    // test if request was successful (status 200)
    if (conn.getResponseCode() != 200) {
        throw new IOException(conn.getResponseMessage());
    }
    // buffer the result into a string
    InputStreamReader isr = new InputStreamReader(conn.getInputStream(), "UTF-8");
    BufferedReader br = new BufferedReader(isr);
    StringBuilder sb = new StringBuilder();
    String line;
    while ((line = br.readLine()) != null) {
        sb.append(line);
    }
    br.close();
    isr.close();
    conn.disconnect();
    return sb.toString();
}

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From source file:io.webfolder.cdp.ChromiumDownloader.java

public static ChromiumVersion getLatestVersion() {
    String url = DOWNLOAD_HOST;//from  w w w  . j a  v a2  s  .  c  om

    if (WINDOWS) {
        url += "/Win_x64/LAST_CHANGE";
    } else if (LINUX) {
        url += "/Linux_x64/LAST_CHANGE";
    } else if (MAC) {
        url += "/Mac/LAST_CHANGE";
    } else {
        throw new CdpException("Unsupported OS found - " + OS);
    }

    try {
        URL u = new URL(url);

        HttpURLConnection conn = (HttpURLConnection) u.openConnection();
        conn.setRequestMethod("GET");
        conn.setConnectTimeout(TIMEOUT);
        conn.setReadTimeout(TIMEOUT);

        if (conn.getResponseCode() != 200) {
            throw new CdpException(conn.getResponseCode() + " - " + conn.getResponseMessage());
        }

        String result = null;
        try (Scanner s = new Scanner(conn.getInputStream())) {
            s.useDelimiter("\\A");
            result = s.hasNext() ? s.next() : "";
        }
        return new ChromiumVersion(Integer.parseInt(result));
    } catch (IOException e) {
        throw new CdpException(e);
    }
}

---

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 w  w w  . ja v  a  2 s .  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:com.example.android.didyoufeelit.Utils.java

/**
 * Make an HTTP request to the given URL and return a String as the response.
 *///from ww  w .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 {
            Log.e(LOG_TAG, "Error response code: " + urlConnection.getResponseCode());
        }
    } catch (IOException e) {
        Log.e(LOG_TAG, "Problem retrieving the earthquake JSON results.", e);
    } finally {
        if (urlConnection != null) {
            urlConnection.disconnect();
        }
        if (inputStream != null) {
            inputStream.close();
        }
    }
    return jsonResponse;
}

---

From source file:org.lightjason.agentspeak.action.builtin.rest.IBaseRest.java

/**
 * creates a HTTP connection and reads the data
 *
 * @param p_url url//from  w  w  w. j  av a  2s  .c  o  m
 * @return url data
 *
 * @throws IOException is thrown on connection errors
 */
@Nonnull
private static String httpdata(@Nonnull final String p_url) throws IOException {
    final HttpURLConnection l_connection = (HttpURLConnection) new URL(p_url).openConnection();

    // follow HTTP redirects
    l_connection.setInstanceFollowRedirects(true);

    // set a HTTP-User-Agent if not exists
    l_connection.setRequestProperty("User-Agent",
            (System.getProperty("http.agent") == null) || (System.getProperty("http.agent").isEmpty())
                    ? CCommon.PACKAGEROOT + CCommon.configuration().getString("version")
                    : System.getProperty("http.agent"));

    // read stream data
    final InputStream l_stream = l_connection.getInputStream();
    final String l_return = CharStreams.toString(new InputStreamReader(l_stream,
            (l_connection.getContentEncoding() == null) || (l_connection.getContentEncoding().isEmpty())
                    ? Charsets.UTF_8
                    : Charset.forName(l_connection.getContentEncoding())));
    Closeables.closeQuietly(l_stream);

    return l_return;
}

---

From source file:imageLines.ImageHelpers.java

/**Read a jpeg image from a url into a BufferedImage*/
public static BufferedImage readAsBufferedImage(URL imageURL, String cookieVal) {
    InputStream i = null;//  ww w  .j a va2  s  .  c o  m
    try {
        HttpURLConnection conn = (HttpURLConnection) imageURL.openConnection();

        conn.setRequestProperty("Cookie", cookieVal);
        int responseCode = conn.getResponseCode();

        if (responseCode == 200 || responseCode == 304) {
            System.out.print("good response" + responseCode + "\n");

        } else {
            System.out.print("bad response " + responseCode + "\n");

        }

        i = conn.getInputStream();
        //JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(i);
        BufferedImage bi = ImageIO.read(i);//decoder.decodeAsBufferedImage();
        return bi;
    } catch (Exception e) {
        System.out.println(e);
        return null;
    } finally {
        try {
            if (i != null)
                i.close();
        } catch (IOException ex) {

        }
    }
}

---

From source file:com.clevertrail.mobile.viewtrail.Object_TrailArticle.java

private static int loadTrailArticle_helper(Activity activity, String sTrailName) {

    String sResponseLine = "";
    //sanity check
    if (sTrailName == null || sTrailName == "")
        return R.string.error_notrailname;

    //connect to clevertrail.com to get trail article
    HttpURLConnection urlConnection = null;
    try {//from  w w  w.j a v a 2s  .  c  om
        String requestURL = String.format("http://clevertrail.com/ajax/handleGetArticleJSONByName.php?name=%s",
                Uri.encode(sTrailName));

        URL url = new URL(requestURL);
        urlConnection = (HttpURLConnection) url.openConnection();

        InputStream in = new BufferedInputStream(urlConnection.getInputStream());

        BufferedReader r = new BufferedReader(new InputStreamReader(in));

        //trail article in json format
        sResponseLine = r.readLine();

    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return R.string.error_contactingclevertrail;
    } catch (IOException e) {
        // TODO Auto-generated catch block
        // could not connect to clevertrail.com
        e.printStackTrace();
        return R.string.error_contactingclevertrail;
    } finally {
        if (urlConnection != null)
            urlConnection.disconnect();
    }

    JSONObject json = null;
    try {
        if (sResponseLine != "")
            json = new JSONObject(sResponseLine);
    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return R.string.error_corrupttrailinfo;
    }

    //now that we have the latest trail information, mark it as unsaved
    Object_TrailArticle.bSaved = false;

    // if json is null, we might not have internet activity so check saved
    // files
    if (json == null) {
        Database_SavedTrails db = new Database_SavedTrails(activity);
        db.openToRead();
        String jsonString = db.getJSONString(sTrailName);
        try {
            json = new JSONObject(jsonString);

            // if we found the json object in the db, mark it as saved
            if (json != null) {
                Object_TrailArticle.bSaved = true;
            }

        } catch (JSONException e) {
            return R.string.error_corrupttrailinfo;
        }
        db.close();
    }

    if (json != null) {
        Object_TrailArticle.createFromJSON(sTrailName, json);
        Object_TrailArticle.jsonText = sResponseLine;

        //after loading the data, launch the activity to actually view the trail
        Intent i = new Intent(mActivity, Activity_ViewTrail.class);
        mActivity.startActivity(i);

        return 0;
    }
    return R.string.error_corrupttrailinfo;
}

---

From source file:com.openforevent.main.UserPosition.java

public static Map<String, Object> userPositionByIP(DispatchContext ctx, Map<String, ? extends Object> context)
        throws IOException {
    URL url = new URL("http://api.ipinfodb.com/v3/ip-city/?" + "key=" + ipinfodb_key + "&" + "&ip=" + default_ip
            + "&format=xml");
    //URL url = new URL("http://ipinfodb.com/ip_query.php");
    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

    // Set properties of the connection
    urlConnection.setRequestMethod("GET");
    urlConnection.setDoInput(true);/*from ww  w  .  j  a v  a2s.  c  om*/
    urlConnection.setDoOutput(true);
    urlConnection.setUseCaches(false);
    urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

    // Retrieve the output
    int responseCode = urlConnection.getResponseCode();
    InputStream inputStream;
    if (responseCode == HttpURLConnection.HTTP_OK) {
        inputStream = urlConnection.getInputStream();
    } else {
        inputStream = urlConnection.getErrorStream();
    }

    StringWriter writer = new StringWriter();
    IOUtils.copy(inputStream, writer, "UTF-8");
    String theString = writer.toString();

    Debug.logInfo("Get user position by IP stream is = ", theString);

    Map<String, Object> paramOut = FastMap.newInstance();
    paramOut.put("stream", theString);
    return paramOut;
}

---

From source file:Main.java

public static String httpPost(String urlStr, List<NameValuePair> params) {

    String paramsEncoded = "";
    if (params != null) {
        paramsEncoded = URLEncodedUtils.format(params, "UTF-8");
    }//from ww w .jav a  2 s.c  o  m

    String result = null;
    URL url = null;
    HttpURLConnection connection = null;
    InputStreamReader in = null;
    try {
        url = new URL(urlStr);
        connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.setDoOutput(true);
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        connection.setRequestProperty("Charset", "utf-8");
        DataOutputStream dop = new DataOutputStream(connection.getOutputStream());
        dop.writeBytes(paramsEncoded);
        dop.flush();
        dop.close();

        in = new InputStreamReader(connection.getInputStream());
        BufferedReader bufferedReader = new BufferedReader(in);
        StringBuffer strBuffer = new StringBuffer();
        String line = null;
        while ((line = bufferedReader.readLine()) != null) {
            strBuffer.append(line);
        }
        result = strBuffer.toString();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (connection != null) {
            connection.disconnect();
        }
        if (in != null) {
            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
    return result;
}

---

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