Example usage for javax.net.ssl HttpsURLConnection connect

List of usage examples for javax.net.ssl HttpsURLConnection connect

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  6. connect

Introduction

In this page you can find the example usage for javax.net.ssl HttpsURLConnection connect.

Prototype

public abstract void connect() throws IOException;

Source Link

Document

Opens a communications link to the resource referenced by this URL, if such a connection has not already been established.

Usage

From source file:net.sf.taverna.t2.security.credentialmanager.impl.HTTPSConnectionAndTrustConfirmationIT.java

@Test
public void testTrustConfirmationAddDeleteCertificateDirectly()
        throws CMException, IOException, CertificateException {
    // Initially trust provider list is empty, we only verify by what is in 
    // Credential Manager's Truststore (and it does not contains the certificate for https://heater.cs.man.ac.uk:7443/)

    // Do not forget to initialise Taverna's/Credential Manager's SSLSocketFactory
    credentialManager.initializeSSL();/*from   ww  w  .  j  ava2 s. c  om*/

    URL url = new URL("https://heater.cs.man.ac.uk:7443/");
    HttpsURLConnection conn;
    conn = (HttpsURLConnection) url.openConnection();
    try {
        // This should fail
        conn.connect();
        fail("Connection to https://heater.cs.man.ac.uk:7443/ should be untrusted at this point.");
    } catch (SSLHandshakeException sslex) {
        // expected to fail so all is good
    } finally {
        conn.disconnect();
    }

    // Add heater's certificate directly to Credential Manager's Truststore

    // Load the test trusted certificate (belonging to heater.cs.man.ac.uk)
    X509Certificate trustedCertficate;
    URL trustedCertficateFileURL = getClass().getResource("/security/tomcat_heater_certificate.pem");
    System.out.println("testTrustConfirmationAddDeleteCertificateDirectly: trusted certficate file URL "
            + trustedCertficateFileURL);
    File trustedCertFile = new File(trustedCertficateFileURL.getPath());
    FileInputStream inStream = new FileInputStream(trustedCertFile);
    //InputStream inStream = getClass().getClassLoader().getResourceAsStream("security/tomcat_heater_certificate.pem");
    CertificateFactory certFactory = CertificateFactory.getInstance("X.509");
    trustedCertficate = (X509Certificate) certFactory.generateCertificate(inStream);
    try {
        inStream.close();
    } catch (Exception e) {
        // Ignore
    }
    String alias = credentialManager.addTrustedCertificate(trustedCertficate);

    HttpsURLConnection conn2 = (HttpsURLConnection) url.openConnection();
    // This should work now
    conn2.connect();
    //System.out.println(conn2.getHeaderField(0));

    assertEquals("HTTP/1.1 200 OK", conn2.getHeaderField(0));
    conn2.disconnect();

    // Now remove certificate and see if the "trust" changes
    credentialManager.deleteTrustedCertificate(alias);
    HttpsURLConnection conn3;
    conn3 = (HttpsURLConnection) url.openConnection();
    try {
        // This should fail
        conn3.connect();
        fail("Connection to https://heater.cs.man.ac.uk:7443/ should be untrusted at this point.");
    } catch (SSLHandshakeException sslex) {
        // expected to fail so all is good
    } finally {
        conn3.disconnect();
    }
}

From source file:com.kaixin.connect.Util.java

/**
 * http/*w  w  w .ja v  a2  s  .co m*/
 * 
 * @param context
 *            
 * @param requestURL
 *            
 * @param httpMethod
 *            GET  POST
 * @param params
 *            key-valuekeyvalueStringbyte[]
 * @param photos
 *            key-value keyfilename
 *            valueInputStreambyte[]
 *            InputStreamopenUrl
 * @return JSON
 * @throws IOException
 */
public static String openUrl(Context context, String requestURL, String httpMethod, Bundle params,
        Map<String, Object> photos) throws IOException {

    OutputStream os;

    if (httpMethod.equals("GET")) {
        requestURL = requestURL + "?" + encodeUrl(params);
    }

    URL url = new URL(requestURL);
    HttpsURLConnection conn = (HttpsURLConnection) getConnection(context, url);

    conn.setRequestProperty("User-Agent",
            System.getProperties().getProperty("http.agent") + " KaixinAndroidSDK");

    conn.setDoInput(true);
    conn.setUseCaches(false);
    conn.setRequestProperty("Connection", "close");
    conn.setRequestProperty("Charsert", "UTF-8");

    if (!httpMethod.equals("GET")) {
        Bundle dataparams = new Bundle();
        for (String key : params.keySet()) {
            if (params.getByteArray(key) != null) {
                dataparams.putByteArray(key, params.getByteArray(key));
            }
        }

        String BOUNDARY = Util.md5(String.valueOf(System.currentTimeMillis())); // 
        String endLine = "\r\n";

        conn.setRequestMethod("POST");

        conn.setDoOutput(true);
        conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + BOUNDARY);

        conn.connect();
        os = new BufferedOutputStream(conn.getOutputStream());

        os.write(("--" + BOUNDARY + endLine).getBytes());
        os.write((encodePostBody(params, BOUNDARY)).getBytes());
        os.write((endLine + "--" + BOUNDARY + endLine).getBytes());

        if (!dataparams.isEmpty()) {

            for (String key : dataparams.keySet()) {
                os.write(("Content-Disposition: form-data; name=\"" + key + "\"" + endLine).getBytes());
                os.write(("Content-Type: content/unknown" + endLine + endLine).getBytes());
                os.write(dataparams.getByteArray(key));
                os.write((endLine + "--" + BOUNDARY + endLine).getBytes());
            }
        }

        if (photos != null && !photos.isEmpty()) {

            for (String key : photos.keySet()) {

                Object obj = photos.get(key);
                if (obj instanceof InputStream) {
                    InputStream is = (InputStream) obj;
                    try {
                        os.write(("Content-Disposition: form-data; name=\"pic\";filename=\"" + key + "\""
                                + endLine).getBytes());
                        os.write(("Content-Type:application/octet-stream\r\n\r\n").getBytes());
                        byte[] data = new byte[UPLOAD_BUFFER_SIZE];
                        int nReadLength = 0;
                        while ((nReadLength = is.read(data)) != -1) {
                            os.write(data, 0, nReadLength);
                        }
                        os.write((endLine + "--" + BOUNDARY + endLine).getBytes());
                    } finally {
                        try {
                            if (null != is) {
                                is.close();
                            }
                        } catch (Exception e) {
                            Log.e(LOG_TAG, "Exception on closing input stream", e);
                        }
                    }
                } else if (obj instanceof byte[]) {
                    byte[] byteArray = (byte[]) obj;
                    os.write(("Content-Disposition: form-data; name=\"pic\";filename=\"" + key + "\"" + endLine)
                            .getBytes());
                    os.write(("Content-Type:application/octet-stream\r\n\r\n").getBytes());
                    os.write(byteArray);
                    os.write((endLine + "--" + BOUNDARY + endLine).getBytes());
                } else {
                    Log.e(LOG_TAG, "");
                }
            }
        }

        os.flush();
    }

    String response = "";
    try {
        response = read(conn.getInputStream());
    } catch (FileNotFoundException e) {
        response = read(conn.getErrorStream());
    }
    return response;
}

From source file:com.ds.kaixin.Util.java

/**
 * http//from  w w  w.j a  v  a  2 s . c o  m
 * 
 * @param context
 *            
 * @param requestURL
 *            
 * @param httpMethod
 *            GET  POST
 * @param params
 *            key-valuekeyvalueString
 *            byte[]
 * @param photos
 *            key-value keyfilename
 *            valueInputStreambyte[]
 *            InputStreamopenUrl
 * @return JSON
 * @throws IOException
 */
public static String openUrl(Context context, String requestURL, String httpMethod, Bundle params,
        Map<String, Object> photos) throws IOException {

    OutputStream os;

    if (httpMethod.equals("GET")) {
        requestURL = requestURL + "?" + encodeUrl(params);
    }

    URL url = new URL(requestURL);
    HttpsURLConnection conn = (HttpsURLConnection) getConnection(context, url);

    conn.setRequestProperty("User-Agent",
            System.getProperties().getProperty("http.agent") + " KaixinAndroidSDK");

    conn.setDoInput(true);
    conn.setUseCaches(false);
    conn.setRequestProperty("Connection", "close");
    conn.setRequestProperty("Charsert", "UTF-8");

    if (!httpMethod.equals("GET")) {
        Bundle dataparams = new Bundle();
        for (String key : params.keySet()) {
            if (params.getByteArray(key) != null) {
                dataparams.putByteArray(key, params.getByteArray(key));
            }
        }

        String BOUNDARY = Util.md5(String.valueOf(System.currentTimeMillis())); // 
        String endLine = "\r\n";

        conn.setRequestMethod("POST");

        conn.setDoOutput(true);
        conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + BOUNDARY);

        conn.connect();
        os = new BufferedOutputStream(conn.getOutputStream());

        os.write(("--" + BOUNDARY + endLine).getBytes());
        os.write((encodePostBody(params, BOUNDARY)).getBytes());
        os.write((endLine + "--" + BOUNDARY + endLine).getBytes());

        if (!dataparams.isEmpty()) {

            for (String key : dataparams.keySet()) {
                os.write(("Content-Disposition: form-data; name=\"" + key + "\"" + endLine).getBytes());
                os.write(("Content-Type: content/unknown" + endLine + endLine).getBytes());
                os.write(dataparams.getByteArray(key));
                os.write((endLine + "--" + BOUNDARY + endLine).getBytes());
            }
        }

        if (photos != null && !photos.isEmpty()) {

            for (String key : photos.keySet()) {

                Object obj = photos.get(key);
                if (obj instanceof InputStream) {
                    InputStream is = (InputStream) obj;
                    try {
                        os.write(("Content-Disposition: form-data; name=\"pic\";filename=\"" + key + "\""
                                + endLine).getBytes());
                        os.write(("Content-Type:application/octet-stream\r\n\r\n").getBytes());
                        byte[] data = new byte[UPLOAD_BUFFER_SIZE];
                        int nReadLength = 0;
                        while ((nReadLength = is.read(data)) != -1) {
                            os.write(data, 0, nReadLength);
                        }
                        os.write((endLine + "--" + BOUNDARY + endLine).getBytes());
                    } finally {
                        try {
                            if (null != is) {
                                is.close();
                            }
                        } catch (Exception e) {
                            Log.e(LOG_TAG, "Exception on closing input stream", e);
                        }
                    }
                } else if (obj instanceof byte[]) {
                    byte[] byteArray = (byte[]) obj;
                    os.write(("Content-Disposition: form-data; name=\"pic\";filename=\"" + key + "\"" + endLine)
                            .getBytes());
                    os.write(("Content-Type:application/octet-stream\r\n\r\n").getBytes());
                    os.write(byteArray);
                    os.write((endLine + "--" + BOUNDARY + endLine).getBytes());
                } else {
                    Log.e(LOG_TAG, "");
                }
            }
        }

        os.flush();
    }

    String response = "";
    try {
        response = read(conn.getInputStream());
    } catch (FileNotFoundException e) {
        response = read(conn.getErrorStream());
    }
    return response;
}

From source file:com.example.onenoteservicecreatepageexample.SendRefreshTokenAsyncTask.java

private Object[] attemptRefreshAccessToken(String refreshToken) throws Exception {
    /**//from   w w w.j  av  a2s .  c  o m
     * A new connection to the endpoint that processes requests for refreshing the access token
     */
    HttpsURLConnection refreshTokenConnection = (HttpsURLConnection) (new URL(MSA_TOKEN_REFRESH_URL))
            .openConnection();
    refreshTokenConnection.setDoOutput(true);
    refreshTokenConnection.setRequestMethod("POST");
    refreshTokenConnection.setDoInput(true);
    refreshTokenConnection.setRequestProperty("Content-Type", TOKEN_REFRESH_CONTENT_TYPE);
    refreshTokenConnection.connect();
    OutputStream refreshTokenRequestStream = null;
    try {
        refreshTokenRequestStream = refreshTokenConnection.getOutputStream();
        String requestBody = MessageFormat.format(TOKEN_REFRESH_REQUEST_BODY, Constants.CLIENTID,
                TOKEN_REFRESH_REDIRECT_URL, refreshToken);
        refreshTokenRequestStream.write(requestBody.getBytes());
        refreshTokenRequestStream.flush();
    } finally {
        if (refreshTokenRequestStream != null) {
            refreshTokenRequestStream.close();
        }
    }
    if (refreshTokenConnection.getResponseCode() == 200) {
        return parseRefreshTokenResponse(refreshTokenConnection);
    } else {
        throw new Exception("The attempt to refresh the access token failed");
    }
}

From source file:org.croudtrip.activities.MainActivity.java

public void showUserInfoInNavigationDrawer() {

    // Get logged-in user and his data
    User user = AccountManager.getLoggedInUser(getApplicationContext());
    String firstName = (user == null || user.getFirstName() == null) ? "" : user.getFirstName();
    String lastName = (user == null || user.getLastName() == null) ? "" : user.getLastName();
    String email = (user == null || user.getEmail() == null) ? "" : user.getEmail();
    final String avatarUrl = (user == null || user.getAvatarUrl() == null) ? null : user.getAvatarUrl();
    Timber.i("Nav drawer avatarUrl is: " + avatarUrl);
    final MaterialAccount account = new MaterialAccount(this.getResources(), firstName + " " + lastName, email,
            R.drawable.profile, R.drawable.background_drawer);
    this.addAccount(account);
    // Download his avatar
    if (avatarUrl != null) {
        Observable.defer(new Func0<Observable<Bitmap>>() {
            @Override//  w w  w .  ja  v a  2  s.co  m
            public Observable<Bitmap> call() {
                try {
                    URL url = new URL(avatarUrl);
                    HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
                    connection.setDoInput(true);
                    connection.connect();
                    InputStream input = connection.getInputStream();
                    return Observable.just(BitmapFactory.decodeStream(input));
                } catch (Exception e) {
                    return Observable.error(e);
                }
            }
        }).compose(new DefaultTransformer<Bitmap>()).subscribe(new Action1<Bitmap>() {
            @Override
            public void call(Bitmap avatar) {
                Timber.d("avatar is null " + (avatar == null));
                Timber.d("" + avatar.getWidth());
                account.setPhoto(avatar);
                notifyAccountDataChanged();
            }
        }, new Action1<Throwable>() {
            @Override
            public void call(Throwable throwable) {
                Timber.e(throwable, "failed to download avatar");
            }
        });
    }
}

From source file:com.google.android.apps.picview.request.CachedWebRequestFetcher.java

/** 
 * Fetches the given URL from the web./*from w w  w.  ja  v a 2 s  .  c  om*/
 */
public String fetchFromWeb(URL url) {

    Log.d(TAG, "Fetching from web: " + url.toString());
    HttpsURLConnection conn = null;
    HttpResponse resp = null;
    try {
        conn = (HttpsURLConnection) url.openConnection();
        conn.setUseCaches(false);
        conn.setReadTimeout(30000); // 30 seconds. 
        conn.setDoInput(true);
        conn.addRequestProperty("GData-Version", "2");
        conn.connect();
        InputStream is = conn.getInputStream();
        return readStringFromStream(is);
    } catch (Exception e) {
        Log.v(TAG, readStringFromStream(conn.getErrorStream()));
        e.printStackTrace();
    }
    return null;
}

From source file:xin.nic.sdk.registrar.util.HttpUtil.java

/**
 * ??HTTPS GET// w  w w  .  j a v a2  s .c o m
 * 
 * @param url URL
 * @return 
 */
public static HttpResp doHttpsGet(URL url) {

    HttpsURLConnection conn = null;
    InputStream inputStream = null;
    Reader reader = null;

    try {
        // ???httphttps
        String protocol = url.getProtocol();
        if (!PROTOCOL_HTTPS.equals(protocol)) {
            throw new XinException("xin.error.url", "?https");
        }

        // 
        conn = (HttpsURLConnection) url.openConnection();

        SSLContext sc = SSLContext.getInstance("SSL");
        sc.init(null, tmArr, new SecureRandom());

        conn.setSSLSocketFactory(sc.getSocketFactory());

        // ?
        conn.setConnectTimeout(connTimeout);
        conn.setReadTimeout(readTimeout);
        conn.setDoOutput(true);
        conn.setDoInput(true);

        // UserAgent
        conn.setRequestProperty("User-Agent", "java-sdk");

        // ?
        conn.connect();

        // ?
        inputStream = conn.getInputStream();
        reader = new InputStreamReader(inputStream, charset);
        BufferedReader bufferReader = new BufferedReader(reader);
        StringBuilder stringBuilder = new StringBuilder();
        String inputLine = "";
        while ((inputLine = bufferReader.readLine()) != null) {
            stringBuilder.append(inputLine);
            stringBuilder.append("\n");
        }

        // 
        HttpResp resp = new HttpResp();
        resp.setStatusCode(conn.getResponseCode());
        resp.setStatusPhrase(conn.getResponseMessage());
        resp.setContent(stringBuilder.toString());

        // 
        return resp;
    } catch (MalformedURLException e) {
        throw new XinException("xin.error.url", "url:" + url + ", url?");
    } catch (IOException e) {
        throw new XinException("xin.error.http", String.format("IOException:%s", e.getMessage()));
    } catch (KeyManagementException e) {
        throw new XinException("xin.error.url", "url:" + url + ", url?");
    } catch (NoSuchAlgorithmException e) {
        throw new XinException("xin.error.url", "url:" + url + ", url?");
    } finally {

        if (reader != null) {
            try {
                reader.close();

            } catch (IOException e) {
                throw new XinException("xin.error.url", "url:" + url + ", reader");
            }
        }

        if (inputStream != null) {
            try {
                inputStream.close();
            } catch (IOException e) {
                throw new XinException("xin.error.url", "url:" + url + ", ?");
            }
        }

        // 
        quietClose(conn);
    }
}

From source file:cn.bidaround.ytcore.kaixin.KaixinUtil.java

/**
 * ??http//from w  w  w  .j  a v  a 2  s.com
 * 
 * @param context
 *            
 * @param requestURL
 *            ??
 * @param httpMethod
 *            GET  POST
 * @param params
 *            key-value??key???value???Stringbyte[]
 * @param photos
 *            key-value??? keyfilename
 *            value????InputStreambyte[]
 *            ?InputStreamopenUrl?
 * @return ?JSON
 * @throws IOException
 */
public static String openUrl(Context context, String requestURL, String httpMethod, Bundle params,
        Map<String, Object> photos) throws IOException {

    OutputStream os;

    if (httpMethod.equals("GET")) {
        requestURL = requestURL + "?" + encodeUrl(params);
    }

    URL url = new URL(requestURL);
    HttpsURLConnection conn = (HttpsURLConnection) getConnection(context, url);

    conn.setRequestProperty("User-Agent",
            System.getProperties().getProperty("http.agent") + " KaixinAndroidSDK");

    conn.setDoInput(true);
    conn.setUseCaches(false);
    conn.setRequestProperty("Connection", "close");
    conn.setRequestProperty("Charsert", "UTF-8");

    if (!httpMethod.equals("GET")) {
        Bundle dataparams = new Bundle();
        //         for (String key : params.keySet()) {
        //            if (params.getByteArray(key) != null) {
        //               dataparams.putByteArray(key, params.getByteArray(key));
        //            }
        //         }

        String BOUNDARY = KaixinUtil.md5(String.valueOf(System.currentTimeMillis())); // ?
        String endLine = "\r\n";

        conn.setRequestMethod("POST");

        conn.setDoOutput(true);
        conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + BOUNDARY);

        conn.connect();
        os = new BufferedOutputStream(conn.getOutputStream());

        os.write(("--" + BOUNDARY + endLine).getBytes());
        os.write((encodePostBody(params, BOUNDARY)).getBytes());
        os.write((endLine + "--" + BOUNDARY + endLine).getBytes());

        if (!dataparams.isEmpty()) {

            for (String key : dataparams.keySet()) {
                os.write(("Content-Disposition: form-data; name=\"" + key + "\"" + endLine).getBytes());
                os.write(("Content-Type: content/unknown" + endLine + endLine).getBytes());
                os.write(dataparams.getByteArray(key));
                os.write((endLine + "--" + BOUNDARY + endLine).getBytes());
            }
        }

        if (photos != null && !photos.isEmpty()) {

            for (String key : photos.keySet()) {

                Object obj = photos.get(key);
                if (obj instanceof InputStream) {
                    InputStream is = (InputStream) obj;
                    try {
                        os.write(("Content-Disposition: form-data; name=\"pic\";filename=\"" + key + "\""
                                + endLine).getBytes());
                        os.write(("Content-Type:application/octet-stream\r\n\r\n").getBytes());
                        byte[] data = new byte[UPLOAD_BUFFER_SIZE];
                        int nReadLength = 0;
                        while ((nReadLength = is.read(data)) != -1) {
                            os.write(data, 0, nReadLength);
                        }
                        os.write((endLine + "--" + BOUNDARY + endLine).getBytes());
                    } finally {
                        try {
                            if (null != is) {
                                is.close();
                            }
                        } catch (Exception e) {
                            Log.e(LOG_TAG, "Exception on closing input stream", e);
                        }
                    }
                } else if (obj instanceof byte[]) {
                    byte[] byteArray = (byte[]) obj;
                    os.write(("Content-Disposition: form-data; name=\"pic\";filename=\"" + key + "\"" + endLine)
                            .getBytes());
                    os.write(("Content-Type:application/octet-stream\r\n\r\n").getBytes());
                    os.write(byteArray);
                    os.write((endLine + "--" + BOUNDARY + endLine).getBytes());
                } else {
                    Log.e(LOG_TAG, "?");
                }
            }
        }

        os.flush();
    }

    String response = "";
    try {
        response = read(conn.getInputStream());
    } catch (FileNotFoundException e) {
        response = read(conn.getErrorStream());
    }
    return response;
}

From source file:io.fabric8.apiman.BearerTokenFilter.java

/**
 * Validates the bearer token with the kubernetes oapi and returns the username
 * if it is a valid token.// ww w  . j a  v a  2  s  .  c o  m
 * 
 * @param bearerHeader
 * @return username of the user to whom the token was issued to
 * @throws IOException - when the token is invalid, or oapi cannot be reached.
 */
protected String validateBearerToken(String bearerHeader) throws IOException {
    ObjectMapper mapper = new ObjectMapper();
    HttpsURLConnection con = (HttpsURLConnection) kubernetesOsapiUrl.openConnection();
    con.setRequestProperty("Authorization", bearerHeader);
    con.setConnectTimeout(10000);
    con.setReadTimeout(10000);
    con.setRequestProperty("Content-Type", "application/json");
    if (kubernetesTrustCert)
        TrustEverythingSSLTrustManager.trustAllSSLCertificates(con);
    con.connect();
    OAuthClientAuthorizationList userList = mapper.readValue(con.getInputStream(),
            OAuthClientAuthorizationList.class);
    String userName = userList.getItems().get(0).getMetadata().getName();
    return userName;
}

From source file:com.glaf.core.util.http.HttpUtils.java

/**
 * ?https?//from  ww  w .jav  a  2  s  .  c  o  m
 * 
 * @param requestUrl
 *            ?
 * @param method
 *            ?GET?POST
 * @param content
 *            ???
 * @return
 */
public static String doRequest(String requestUrl, String method, String content, boolean isSSL) {
    log.debug("requestUrl:" + requestUrl);
    HttpsURLConnection conn = null;
    InputStream inputStream = null;
    BufferedReader bufferedReader = null;
    InputStreamReader inputStreamReader = null;
    StringBuffer buffer = new StringBuffer();
    try {
        URL url = new URL(requestUrl);
        conn = (HttpsURLConnection) url.openConnection();
        if (isSSL) {
            // SSLContext??
            TrustManager[] tm = { new MyX509TrustManager() };
            SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
            sslContext.init(null, tm, new java.security.SecureRandom());
            // SSLContextSSLSocketFactory
            SSLSocketFactory ssf = sslContext.getSocketFactory();
            conn.setSSLSocketFactory(ssf);
        }
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setUseCaches(false);
        // ?GET/POST
        conn.setRequestMethod(method);
        if ("GET".equalsIgnoreCase(method)) {
            conn.connect();
        }

        // ????
        if (StringUtils.isNotEmpty(content)) {
            OutputStream outputStream = conn.getOutputStream();
            // ????
            outputStream.write(content.getBytes("UTF-8"));
            outputStream.flush();
            outputStream.close();
        }

        // ???
        inputStream = conn.getInputStream();
        inputStreamReader = new InputStreamReader(inputStream, "UTF-8");
        bufferedReader = new BufferedReader(inputStreamReader);

        String str = null;
        while ((str = bufferedReader.readLine()) != null) {
            buffer.append(str);
        }

        log.debug("response:" + buffer.toString());

    } catch (ConnectException ce) {
        ce.printStackTrace();
        log.error(" http server connection timed out.");
    } catch (Exception ex) {
        ex.printStackTrace();
        log.error("http request error:{}", ex);
    } finally {
        IOUtils.closeQuietly(inputStream);
        IOUtils.closeQuietly(bufferedReader);
        IOUtils.closeQuietly(inputStreamReader);
        if (conn != null) {
            conn.disconnect();
        }
    }
    return buffer.toString();
}