Example usage for java.net HttpURLConnection getInputStream

List of usage examples for java.net HttpURLConnection getInputStream

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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:Main.java

/**
 * This method fetches data from a given url
 *
 * @param strUrl Url from which the data will be fetched
 * @return A String representing the resource obtained in the connection
 * @throws IOException If something went wrong with the connection
 *///  w w w . j  av a 2 s  .  c o m
public static String getDataFromUrl(String strUrl) throws IOException {
    InputStream iStream;
    HttpURLConnection urlConnection;
    URL url = new URL(strUrl);

    // Creating an http connection to communicate with url
    urlConnection = (HttpURLConnection) url.openConnection();

    // Connecting to url
    urlConnection.connect();

    // Reading data from url
    iStream = urlConnection.getInputStream();

    BufferedReader br = new BufferedReader(new InputStreamReader(iStream));

    StringBuilder sb = new StringBuilder();

    String line;
    while ((line = br.readLine()) != null) {
        sb.append(line);
    }
    br.close();
    iStream.close();
    urlConnection.disconnect();
    return sb.toString();
}

From source file:com.google.cloud.runtime.jetty.util.HttpUrlUtil.java

/**
 * Obtain the text (non-binary) response body from an {@link HttpURLConnection},
 * using the response provided charset.//from   w  w w .j  a  v a  2  s .c  o m
 * <p>
 * Note: Normal HttpURLConnection doesn't use the provided charset properly.
 * </p>
 *
 * @param http the {@link HttpURLConnection} to obtain the response body from
 * @return the text of the response body
 * @throws IOException if unable to get the text of the response body
 */
public static String getResponseBody(HttpURLConnection http) throws IOException {
    Charset responseEncoding = StandardCharsets.UTF_8;
    if (http.getContentEncoding() != null) {
        responseEncoding = Charset.forName(http.getContentEncoding());
    }

    return IOUtils.toString(http.getInputStream(), responseEncoding);
}

From source file:Main.java

public static String getJsonContent(String url_path) {
    try {//from   w  w  w .ja  v  a  2 s.co m
        URL url = new URL(url_path);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setConnectTimeout(3000);
        connection.setRequestMethod("GET");
        connection.setDoInput(true);
        int code = connection.getResponseCode();
        if (code == 200) {
            return changeInputStream(connection.getInputStream());
        }
    } catch (Exception e) {

    }
    return "";
}

From source file:Main.java

public static String customrequestget(String url, HashMap<String, String> map, String method) {

    if (null != map) {
        int i = 0;
        for (Map.Entry<String, String> entry : map.entrySet()) {

            if (i == 0) {
                url = url + "?" + entry.getKey() + "=" + entry.getValue();
            } else {
                url = url + "&" + entry.getKey() + "=" + entry.getValue();
            }/*from  w ww  .j  av a  2  s . com*/

            i++;
        }
    }
    try {

        URL murl = new URL(url);
        System.out.print(url);
        HttpURLConnection conn = (HttpURLConnection) murl.openConnection();
        conn.setConnectTimeout(5 * 1000);
        conn.setRequestMethod(method);

        conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows XP; DigExt)");

        InputStream inStream = conn.getInputStream();
        String result = inputStream2String(inStream);
        conn.disconnect();
        return result;
    } catch (Exception e) {
        // TODO: handle exception
    }
    return null;
}

From source file:com.arthurpitman.common.HttpUtils.java

/**
 * Downloads a file from a URL and saves it to the local file system.
 * @param url the URL to connect to.//w  w w  . j  av a 2  s  . co m
 * @param requestProperties optional request properties, <code>null</code> if not required.
 * @param outputFile local file to write to.
 * @throws IOException
 */
public static void downloadFile(final String url, final RequestProperty[] requestProperties,
        final File outputFile) throws IOException {
    for (int i = 0;; i++) {
        HttpURLConnection connection = null;
        try {
            connection = connectGet(url, requestProperties);
            StreamUtils.readStreamIntoFile(connection.getInputStream(), outputFile, BUFFER_SIZE, true);
            return;
        } catch (IOException e) {
            if (i == CONNECTION_RETRIES) {
                throw e;
            }
        } finally {
            // always close the connection
            if (connection != null) {
                connection.disconnect();
            }
        }

        // allow recovery time
        try {
            Thread.sleep(CONNECTION_RETRY_SLEEP);
        } catch (InterruptedException e) {
        }
    }
}

From source file:OCRRestAPI.java

private static void DownloadConvertedFile(String outputFileUrl) throws IOException {
    URL downloadUrl = new URL(outputFileUrl);
    HttpURLConnection downloadConnection = (HttpURLConnection) downloadUrl.openConnection();

    if (downloadConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {

        InputStream inputStream = downloadConnection.getInputStream();

        // opens an output stream to save into file
        FileOutputStream outputStream = new FileOutputStream("C:\\converted_file.doc");

        int bytesRead = -1;
        byte[] buffer = new byte[4096];
        while ((bytesRead = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, bytesRead);
        }/*w w  w . j  a  va2  s.c  o m*/

        outputStream.close();
        inputStream.close();
    }

    downloadConnection.disconnect();
}

From source file:com.itwizard.mezzofanti.Translate.java

/**
 * Forms an HTTP request and parses the response for a translation.
 *
 * @param text The String to translate./*w w w .j av  a  2 s  . co m*/
 * @param from The language code to translate from.
 * @param to The language code to translate to.
 * @return The translated String.
 * @throws Exception
 */
private static String retrieveTranslation(String text, String from, String to) throws Exception {
    try {
        StringBuilder url = new StringBuilder();
        url.append(URL_STRING).append(from).append("%7C").append(to);
        url.append(TEXT_VAR).append(URLEncoder.encode(text, ENCODING));

        Log.d("TEST", "Connecting to " + url.toString());
        HttpURLConnection uc = (HttpURLConnection) new URL(url.toString()).openConnection();
        uc.setDoInput(true);
        uc.setDoOutput(true);
        try {
            Log.d("TEST", "getInputStream()");
            InputStream is = uc.getInputStream();
            String result = toString(is);

            JSONObject json = new JSONObject(result);
            return ((JSONObject) json.get("responseData")).getString("translatedText");
        } finally { // http://java.sun.com/j2se/1.5.0/docs/guide/net/http-keepalive.html
            uc.getInputStream().close();
            if (uc.getErrorStream() != null)
                uc.getErrorStream().close();
        }
    } catch (Exception ex) {
        throw ex;
    }
}

From source file:Main.java

private static String connect(String uri, String charsetName) {
    String result = "";
    try {/*from   www.  j a  va 2s .  co  m*/
        URL url = new URL(uri);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setConnectTimeout(5 * 1000);
        if (Integer.parseInt(Build.VERSION.SDK) < 8) {
            System.setProperty("http.keepAlive", "false");
        }
        if (conn.getResponseCode() == 200) {
            InputStream is = conn.getInputStream();
            result = readData(is, charsetName);
        }
        conn.disconnect();
    } catch (MalformedURLException e) {
    } catch (IOException e) {
    } catch (Exception e) {
    }
    return result;
}

From source file:com.android.feedmeandroid.HTTPClient.java

public static Bitmap downloadFile(final String fileUrl) {
    final Bitmap[] bitmap = new Bitmap[1];
    Thread t = new Thread(new Runnable() {
        public void run() {
            URL myFileUrl = null;
            try {
                myFileUrl = new URL(fileUrl);
            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();//from w ww .  j a  v  a  2 s. com
            }
            try {
                HttpURLConnection conn = (HttpURLConnection) myFileUrl.openConnection();
                conn.setDoInput(true);
                conn.connect();
                InputStream is = conn.getInputStream();

                Bitmap bmImg = BitmapFactory.decodeStream(is);
                bitmap[0] = bmImg;
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    });
    t.start();
    try {
        t.join();
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return bitmap[0];
}

From source file:com.mboarder.util.Translate.java

/**
 * Forms an HTTP request and parses the response for a translation.
 *
 * @param text The String to translate.//  w w w .ja  v a 2  s.co m
 * @param from The language code to translate from.
 * @param to The language code to translate to.
 * @return The translated String.
 * @throws Exception
 */
private static String retrieveTranslation(String text, String from, String to) throws Exception {
    try {
        StringBuilder url = new StringBuilder();
        url.append(URL_STRING).append(from).append("%7C").append(to);
        url.append(TEXT_VAR).append(URLEncoder.encode(text, ENCODING));

        Log.d(TAG, "Connecting to " + url.toString());
        HttpURLConnection uc = (HttpURLConnection) new URL(url.toString()).openConnection();
        uc.setDoInput(true);
        uc.setDoOutput(true);
        try {
            Log.d(TAG, "getInputStream()");
            InputStream is = uc.getInputStream();
            String result = toString(is);

            JSONObject json = new JSONObject(result);
            return ((JSONObject) json.get("responseData")).getString("translatedText");
        } finally { // http://java.sun.com/j2se/1.5.0/docs/guide/net/http-keepalive.html
            uc.getInputStream().close();
            if (uc.getErrorStream() != null)
                uc.getErrorStream().close();
        }
    } catch (Exception ex) {
        throw ex;
    }
}