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:Main.java

public static String doGet(String urlStr) {
    URL url = null;/*  www .  j  a  v a 2  s  . c om*/
    HttpURLConnection conn = null;
    InputStream is = null;
    ByteArrayOutputStream baos = null;
    try {
        url = new URL(urlStr);
        conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(TIMEOUT_IN_MILLIONS);
        conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);
        conn.setRequestMethod("GET");
        conn.setRequestProperty("accept", "*/*");
        conn.setRequestProperty("connection", "Keep-Alive");
        if (conn.getResponseCode() == 200) {
            is = conn.getInputStream();
            baos = new ByteArrayOutputStream();
            int len = -1;
            byte[] buf = new byte[128];

            while ((len = is.read(buf)) != -1) {
                baos.write(buf, 0, len);
            }
            baos.flush();
            return baos.toString();
        } else {
            throw new RuntimeException(" responseCode is not 200 ... ");
        }

    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            if (is != null)
                is.close();
        } catch (IOException e) {
        }
        try {
            if (baos != null)
                baos.close();
        } catch (IOException e) {
        }
        conn.disconnect();
    }

    return null;

}

---

From source file:org.apache.brooklyn.util.http.HttpTool.java

/**
 * Consumes the input stream entirely and then cleanly closes the connection.
 * Ignores all exceptions completely, not even logging them!
 *
 * Consuming the stream fully is useful for preventing idle TCP connections.
 * @see <a href="http://docs.oracle.com/javase/8/docs/technotes/guides/net/http-keepalive.html">Persistent Connections</a>
 *//*from w  w  w . j  a  v  a 2  s.com*/
public static void consumeAndCloseQuietly(HttpURLConnection connection) {
    try {
        Streams.readFully(connection.getInputStream());
    } catch (Exception e) {
    }
    closeQuietly(connection);
}

---

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  ww .  ja  v a2  s  .  c  om*/
 * @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:Main.java

public static byte[] doGet(String urlStr) {
    URL url = null;//from  ww w  .  jav a  2  s.  co  m
    HttpURLConnection conn = null;
    InputStream is = null;
    ByteArrayOutputStream baos = null;
    try {
        url = new URL(urlStr);
        conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(TIMEOUT_IN_MILLIONS);
        conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);
        conn.setRequestMethod("GET");
        conn.setRequestProperty("accept", "*/*");
        conn.setRequestProperty("connection", "Keep-Alive");
        if (conn.getResponseCode() == 200) {
            is = conn.getInputStream();
            baos = new ByteArrayOutputStream();
            int len = -1;
            byte[] buf = new byte[128];

            while ((len = is.read(buf)) != -1) {
                baos.write(buf, 0, len);
            }
            baos.flush();
            return baos.toByteArray();
        } else {
            throw new RuntimeException(" responseCode is not 200 ... ");
        }

    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            if (is != null)
                is.close();
        } catch (IOException e) {
        }
        try {
            if (baos != null)
                baos.close();
        } catch (IOException e) {
        }
        conn.disconnect();
    }

    return null;

}

---

From source file:com.machinepublishers.jbrowserdriver.StreamConnectionClient.java

private static SSLContext sslContext() {
    final String property = SettingsManager.settings().ssl();
    if (property != null && !property.isEmpty() && !"null".equals(property)) {
        if ("trustanything".equals(property)) {
            try {
                return SSLContexts.custom().loadTrustMaterial(KeyStore.getInstance(KeyStore.getDefaultType()),
                        new TrustStrategy() {
                            public boolean isTrusted(X509Certificate[] chain, String authType)
                                    throws CertificateException {
                                return true;
                            }/*from   w ww.  ja  va2 s. c  o  m*/
                        }).build();
            } catch (Throwable t) {
                LogsServer.instance().exception(t);
            }
        } else {
            try {
                String location = property;
                location = location.equals("compatible")
                        ? "https://raw.githubusercontent.com/bagder/ca-bundle/master/ca-bundle.crt"
                        : location;
                File cachedPemFile = new File("./pemfile_cached");
                boolean remote = location.startsWith("https://") || location.startsWith("http://");
                if (remote && cachedPemFile.exists()
                        && (System.currentTimeMillis() - cachedPemFile.lastModified() < 48 * 60 * 60 * 1000)) {
                    location = cachedPemFile.getAbsolutePath();
                    remote = false;
                }
                String pemBlocks = null;
                if (remote) {
                    HttpURLConnection remotePemFile = (HttpURLConnection) StreamHandler
                            .defaultConnection(new URL(location));
                    remotePemFile.setRequestMethod("GET");
                    remotePemFile.connect();
                    pemBlocks = Util.toString(remotePemFile.getInputStream(), Util.charset(remotePemFile));
                    cachedPemFile.delete();
                    Files.write(Paths.get(cachedPemFile.getAbsolutePath()), pemBlocks.getBytes("utf-8"));
                } else {
                    pemBlocks = new String(Files.readAllBytes(Paths.get(new File(location).getAbsolutePath())),
                            "utf-8");
                }
                KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
                keyStore.load(null);
                CertificateFactory cf = CertificateFactory.getInstance("X.509");
                Matcher matcher = pemBlock.matcher(pemBlocks);
                boolean found = false;
                while (matcher.find()) {
                    String pemBlock = matcher.group(1).replaceAll("[\\n\\r]+", "");
                    ByteArrayInputStream byteStream = new ByteArrayInputStream(
                            Base64.getDecoder().decode(pemBlock));
                    java.security.cert.X509Certificate cert = (java.security.cert.X509Certificate) cf
                            .generateCertificate(byteStream);
                    String alias = cert.getSubjectX500Principal().getName("RFC2253");
                    if (alias != null && !keyStore.containsAlias(alias)) {
                        found = true;
                        keyStore.setCertificateEntry(alias, cert);
                    }
                }
                if (found) {
                    KeyManagerFactory keyManager = KeyManagerFactory
                            .getInstance(KeyManagerFactory.getDefaultAlgorithm());
                    keyManager.init(keyStore, null);
                    TrustManagerFactory trustManager = TrustManagerFactory
                            .getInstance(TrustManagerFactory.getDefaultAlgorithm());
                    trustManager.init(keyStore);
                    SSLContext context = SSLContext.getInstance("TLS");
                    context.init(keyManager.getKeyManagers(), trustManager.getTrustManagers(), null);
                    return context;
                }
            } catch (Throwable t) {
                LogsServer.instance().exception(t);
            }
        }
    }
    return SSLContexts.createSystemDefault();
}

---

From source file:outfox.dict.contest.util.FileUtils.java

/**
 * ??/*from   ww w .j a  v a 2s  .  com*/
 * @param downloadUrl
 * @return
 */
public static byte[] getbytesFromURL(String downloadUrl) {
    HttpURLConnection httpUrl = null;
    ByteArrayOutputStream out = null;
    byte[] byteArray = null;
    InputStream in = null;
    try {
        // 
        URL url = new URL(downloadUrl);
        httpUrl = (HttpURLConnection) url.openConnection();
        // ?
        httpUrl.connect();
        // ??
        in = httpUrl.getInputStream();

        out = new ByteArrayOutputStream();
        byte[] b = new byte[4096];
        int n;
        while ((n = in.read(b)) != -1) {
            out.write(b, 0, n);
        }
        byteArray = out.toByteArray();
        in.close();
        out.close();
        httpUrl.disconnect();
    } catch (Exception e) {
        LOG.error("FileUtils.getBytesFromURL error...", e);
    }
    return byteArray;
}

---

From source file:fr.haploid.webservices.WebServicesHelper.java

protected static synchronized WebServicesResponseData downloadFromServer(String url, JSONObject params,
        String type) {//from  ww w  .  j ava2  s. co m

    int responseCode = 9999;

    StringBuffer buffer = new StringBuffer();

    Uri.Builder builder = new Uri.Builder();
    builder.encodedPath(url);

    JSONArray namesOfParams = params.names();

    for (int i = 0; i < namesOfParams.length(); i++) {
        try {
            String param = namesOfParams.getString(i);
            builder.appendQueryParameter(param, params.get(param).toString());
        } catch (JSONException e) {
            return new WebServicesResponseData("JSONException " + e.toString(), responseCode, false);
        }
    }

    URL urlBuild;

    try {
        urlBuild = new URL(builder.build().toString());
    } catch (MalformedURLException e) {
        return new WebServicesResponseData("MalformedURLException " + e.toString(), responseCode, false);
    }

    try {
        HttpURLConnection urlConnection = (HttpURLConnection) urlBuild.openConnection();
        try {
            urlConnection.setRequestMethod(type);
        } catch (ProtocolException e) {
            return new WebServicesResponseData("ProtocolException " + e.toString(), responseCode, false);
        }

        urlConnection.connect();
        responseCode = urlConnection.getResponseCode();
        if (responseCode < 400) {
            InputStream inputStream = urlConnection.getInputStream();
            if (inputStream == null) {
                return new WebServicesResponseData(null, responseCode, false);
            }
            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

            String line;
            while ((line = reader.readLine()) != null) {
                buffer.append(line + "\n");
            }

            if (buffer.length() == 0) {
                return new WebServicesResponseData(null, responseCode, false);
            }
        }
    } catch (IOException e) {
        return new WebServicesResponseData("IOException " + e.toString(), responseCode, false);
    }
    return new WebServicesResponseData(buffer.toString(), responseCode, true);
}

---

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 ww.  j a  v  a2 s  . 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

public static JSONObject updateRequest(String query) {
    HttpURLConnection connection = null;
    try {//from   w  w w . ja  va  2  s  . co  m
        connection = (HttpURLConnection) new URL(url + query).openConnection();
        connection.setRequestMethod("PUT");
        connection.setRequestProperty("Accept-Charset", charset);

        OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream());
        out.write("Resource content");
        out.close();

        statusCode = connection.getResponseCode();
        if (statusCode != 200) {
            return null;
        }

        InputStream response = connection.getInputStream();
        BufferedReader bR = new BufferedReader(new InputStreamReader(response));
        String line = "";

        StringBuilder responseStrBuilder = new StringBuilder();
        while ((line = bR.readLine()) != null) {
            responseStrBuilder.append(line);
        }
        response.close();
        return new JSONObject(responseStrBuilder.toString());

    } catch (IOException | JSONException e) {
        e.printStackTrace();
    }
    return new JSONObject();
}

---

From source file:com.company.project.core.connector.HttpClientHelper.java

public static String getResponseStringFromConn(HttpURLConnection conn, String payLoad) throws IOException {

    // Send the http message payload to the server.
    if (payLoad != null) {
        conn.setDoOutput(true);//  w  ww .j  a v a 2s.c o m
        OutputStreamWriter osw = new OutputStreamWriter(conn.getOutputStream());
        osw.write(payLoad);
        osw.flush();
        osw.close();
    }

    // Get the message response from the server.
    BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    String line = "";
    StringBuffer stringBuffer = new StringBuffer();
    while ((line = br.readLine()) != null) {
        stringBuffer.append(line);
    }

    br.close();

    return stringBuffer.toString();
}

---

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