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:Main.java

private static HttpURLConnection _openPostConnection(String purl) throws IOException {
    URL url = new URL(purl);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setDoInput(true);/*from   w  ww.  j  a va  2 s  . c  o  m*/
    connection.setUseCaches(false);
    connection.setDoOutput(true);
    connection.setRequestMethod("GET");
    connection.setRequestProperty("User-Agent", "Android Client Agent");

    return connection;
}

From source file:Main.java

static String downloadHtml(String urlString) {
    StringBuffer buffer = new StringBuffer();

    try {/*w ww .j a v a 2 s. c  om*/
        URL url = new URL(urlString);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        HttpURLConnection.setFollowRedirects(true);
        conn.setRequestProperty("Accept-Encoding", "gzip, deflate");
        String encoding = conn.getContentEncoding();
        InputStream inStr = null;

        if (encoding != null && encoding.equalsIgnoreCase("gzip")) {
            inStr = new GZIPInputStream(conn.getInputStream());
        } else if (encoding != null && encoding.equalsIgnoreCase("deflate")) {
            inStr = new InflaterInputStream(conn.getInputStream(), new Inflater(true));
        } else {
            inStr = conn.getInputStream();
        }
        int ptr = 0;
        InputStreamReader inStrReader = new InputStreamReader(inStr, Charset.forName("GB2312"));

        while ((ptr = inStrReader.read()) != -1) {
            buffer.append((char) ptr);
        }
        inStrReader.close();
        conn.disconnect();
        inStr.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return buffer.toString();
}

From source file:Main.java

private static HttpURLConnection createHttpsURLConnection(String urlString) throws IOException {
    URL url = new URL(urlString);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setConnectTimeout(ONE_MINUTE);
    connection.setReadTimeout(ONE_MINUTE);

    return connection;
}

From source file:Main.java

private static String readXmlFromURL(String theUrl) {
    StringBuilder content = new StringBuilder();
    try {/*from w w  w.ja  va2s  . c  om*/
        URL url = new URL(theUrl);
        URLConnection urlConnection = url.openConnection();

        BufferedReader bufferedReader = new BufferedReader(
                new InputStreamReader(urlConnection.getInputStream()));

        String line;
        while ((line = bufferedReader.readLine()) != null) {
            content.append(line + "\n");
        }
        bufferedReader.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return content.toString();
}

From source file:com.joliciel.jochre.search.webClient.SearchWebClientUtils.java

public static String getJson(URL url) {
    try {//  w  w w  .  ja v a2s .  c o  m
        URLConnection con = url.openConnection();
        InputStream in = con.getInputStream();
        StringWriter writer = new StringWriter();
        IOUtils.copy(in, writer, "UTF-8");
        String json = writer.toString();
        return json;
    } catch (IOException e) {
        LogUtils.logError(LOG, e);
        throw new RuntimeException(e);
    }
}

From source file:com.threerings.getdown.util.ConnectionUtil.java

/**
 * Opens a connection to a URL, setting the authentication header if user info is present.
 *///from   w ww .j ava2s. co  m
public static URLConnection open(URL url) throws IOException {
    URLConnection conn = url.openConnection();

    // If URL has a username:password@ before hostname, use HTTP basic auth
    String userInfo = url.getUserInfo();
    if (userInfo != null) {
        // Remove any percent-encoding in the username/password
        userInfo = URLDecoder.decode(userInfo, "UTF-8");
        // Now base64 encode the auth info and make it a single line
        String encoded = Base64.encodeBase64String(userInfo.getBytes("UTF-8")).replaceAll("\\n", "")
                .replaceAll("\\r", "");
        conn.setRequestProperty("Authorization", "Basic " + encoded);
    }

    return conn;
}

From source file:Main.java

public static InputStream getIS(String address) {
    InputStream is = null;//from   w  w w. j a v a2 s. c  o m
    try {
        URL url = new URL(address);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setDoInput(true);
        conn.connect();
        is = conn.getInputStream();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return is;
}

From source file:Main.java

private static String getRawText(String link) throws IOException {

    URL url;
    url = new URL(link);

    URLConnection connection = url.openConnection();

    BufferedReader bufferedReader = new BufferedReader(
            new InputStreamReader(connection.getInputStream(), "UTF-8"));

    StringBuffer stringBuffer = new StringBuffer();
    String inputLine;/*ww w.  jav a2  s  .  c  o m*/
    // read from buffer line by line
    while ((inputLine = bufferedReader.readLine()) != null) {
        stringBuffer.append(inputLine + "\n");
    }
    bufferedReader.close();
    return stringBuffer.toString();
}

From source file:Main.java

/**
 * /*from   w  ww  . j a v a  2  s  .c om*/
 * @param imgURL
 * @return
 */
public static BitmapDrawable downloadBitmapDrawable(String imgURL) {
    BitmapDrawable icon = null;
    try {
        URL url = new URL(imgURL);
        HttpURLConnection hc = (HttpURLConnection) url.openConnection();
        icon = new BitmapDrawable(hc.getInputStream());
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
    return icon;
}

From source file:MainClass.java

public static void saveBinaryFile(URL u) {
    int bufferLength = 128;
    try {//from   ww  w  .j av  a 2  s.c  o  m
        URLConnection uc = u.openConnection();
        String ct = uc.getContentType();
        int contentLength = uc.getContentLength();
        if (ct.startsWith("text/") || contentLength == -1) {
            System.err.println("This is not a binary file.");
            return;
        }

        InputStream stream = uc.getInputStream();
        byte[] buffer = new byte[contentLength];
        int bytesread = 0;
        int offset = 0;
        while (bytesread >= 0) {
            bytesread = stream.read(buffer, offset, bufferLength);
            if (bytesread == -1)
                break;
            offset += bytesread;
        }
        if (offset != contentLength) {
            System.err.println("Error: Only read " + offset + " bytes");
            System.err.println("Expected " + contentLength + " bytes");
        }

        String theFile = u.getFile();
        theFile = theFile.substring(theFile.lastIndexOf('/') + 1);
        FileOutputStream fout = new FileOutputStream(theFile);
        fout.write(buffer);
    } catch (Exception e) {
        System.err.println(e);
    }
    return;
}