Example usage for java.net HttpURLConnection connect

List of usage examples for java.net HttpURLConnection connect

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Introduction

In this page you can find the example usage for java.net HttpURLConnection 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:com.intellij.lang.jsgraphql.languageservice.JSGraphQLNodeLanguageServiceClient.java

private static <R> R executeRequest(Request request, Class<R> responseClass, @NotNull Project project,
        boolean setProjectDir) {

    URL url = getJSGraphQLNodeLanguageServiceInstance(project, setProjectDir);
    if (url == null) {
        return null;
    }/*from ww w  .j  a v  a2  s .  co  m*/
    HttpURLConnection httpConnection = null;
    try {
        httpConnection = (HttpURLConnection) url.openConnection();
        httpConnection.setConnectTimeout(50);
        httpConnection.setReadTimeout(1000);
        httpConnection.setRequestMethod("POST");
        httpConnection.setDoOutput(true);
        httpConnection.setRequestProperty("Content-Type", "application/json");
        httpConnection.connect();
        try (OutputStreamWriter writer = new OutputStreamWriter(httpConnection.getOutputStream())) {
            final String jsonRequest = new Gson().toJson(request);
            writer.write(jsonRequest);
            writer.flush();
            writer.close();
        }
        if (httpConnection.getResponseCode() == 200) {
            if (responseClass == null) {
                return null;
            }
            try (InputStream inputStream = httpConnection.getInputStream()) {
                String jsonResponse = IOUtils.toString(inputStream, "UTF-8");
                R response = new Gson().fromJson(jsonResponse, responseClass);
                return response;
            }
        } else {
            log.warn("Got error from JS GraphQL Language Service: HTTP " + httpConnection.getResponseCode()
                    + ": " + httpConnection.getResponseMessage());
        }
    } catch (IOException e) {
        log.warn("Unable to connect to dev server", e);
    } finally {
        if (httpConnection != null) {
            httpConnection.disconnect();
        }
    }
    return null;
}

From source file:Main.java

/**
 * On some devices we have to hack://  w  w  w  .j a v  a  2 s .c  o m
 * http://developers.sun.com/mobility/reference/techart/design_guidelines/http_redirection.html
 * @return the resolved url if any. Or null if it couldn't resolve the url
 * (within the specified time) or the same url if response code is OK
 */
public static String getResolvedUrl(String urlAsString, int timeout) {
    try {
        URL url = new URL(urlAsString);
        //using proxy may increase latency
        HttpURLConnection hConn = (HttpURLConnection) url.openConnection(Proxy.NO_PROXY);
        // force no follow

        hConn.setInstanceFollowRedirects(false);
        // the program doesn't care what the content actually is !!
        // http://java.sun.com/developer/JDCTechTips/2003/tt0422.html
        hConn.setRequestMethod("HEAD");
        // default is 0 => infinity waiting
        hConn.setConnectTimeout(timeout);
        hConn.setReadTimeout(timeout);
        hConn.connect();
        int responseCode = hConn.getResponseCode();
        hConn.getInputStream().close();
        if (responseCode == HttpURLConnection.HTTP_OK)
            return urlAsString;

        String loc = hConn.getHeaderField("Location");
        if (responseCode == HttpURLConnection.HTTP_MOVED_PERM && loc != null)
            return loc.replaceAll(" ", "+");

    } catch (Exception ex) {
    }
    return "";
}

From source file:com.evrythng.java.wrapper.util.FileUtils.java

private static HttpURLConnection getConnectionForPrivateUpload(final URL url, final String contentType)
        throws IOException {

    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod(HttpPut.METHOD_NAME);

    connection.setRequestProperty(HttpHeaders.CONTENT_TYPE, contentType);
    connection.setRequestProperty(X_AMZ_ACL_HEADER_NAME, X_AMZ_ACL_HEADER_VALUE_PRIVATE);
    connection.setDoOutput(true);/*from   w w w  .ja  v a  2 s .co  m*/
    connection.connect();
    return connection;
}

From source file:a122016.rr.com.alertme.QueryUtils.java

/**
 * Make an HTTP request to the given URL and return a String as the response.
 *//*from  w  w w.j ava2 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 Places JSON results.", e);
    } finally {
        if (urlConnection != null) {
            urlConnection.disconnect();
        }
        if (inputStream != null) {
            // Closing the input stream could throw an IOException, which is why
            // the makeHttpRequest(URL url) method signature specifies than an IOException
            // could be thrown.
            inputStream.close();
        }
    }
    return jsonResponse;
}

From source file:com.evrythng.java.wrapper.util.FileUtils.java

private static HttpURLConnection getConnectionForPublicUpload(final URL url, final String contentType)
        throws IOException {

    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod(HttpPut.METHOD_NAME);
    connection.setRequestProperty(HttpHeaders.CONTENT_TYPE, contentType);
    connection.setRequestProperty(X_AMZ_ACL_HEADER_NAME, X_AMZ_ACL_HEADER_VALUE_PUBLIC_READ);
    connection.setDoOutput(true);/*from   w w  w  .ja  v  a2s .com*/
    connection.connect();
    return connection;
}

From source file:ee.ria.xroad.signer.certmanager.OcspClient.java

private static HttpURLConnection createConnection(URL url) throws IOException {
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestProperty(MimeUtils.HEADER_CONTENT_TYPE, MimeTypes.OCSP_REQUEST);
    connection.setRequestProperty("Accept", MimeTypes.OCSP_RESPONSE);
    connection.setDoOutput(true);//from  w w w  . j  av  a 2  s  . c o  m
    connection.setConnectTimeout(CONNECT_TIMEOUT_MS);
    connection.setReadTimeout(READ_TIMEOUT_MS);
    connection.connect();

    return connection;
}

From source file:net.kourlas.voipms_sms.Utils.java

/**
 * Retrieves a JSON object from the specified URL.
 * <p/>/*from   www  . j  ava2 s .c  om*/
 * Note that this is a blocking method; it should not be called from the URI thread.
 *
 * @param urlString The URL to retrieve the JSON from.
 * @return The JSON object at the specified URL.
 * @throws IOException   if a connection to the server could not be established.
 * @throws JSONException if the server did not return valid JSON.
 */
public static JSONObject getJson(String urlString) throws IOException, JSONException {
    URL url = new URL(urlString);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setReadTimeout(10000);
    connection.setConnectTimeout(15000);
    connection.setRequestMethod("GET");
    connection.setDoInput(true);
    connection.connect();

    BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
    StringBuilder data = new StringBuilder();
    String newLine = System.getProperty("line.separator");
    String line;
    while ((line = reader.readLine()) != null) {
        data.append(line);
        data.append(newLine);
    }
    reader.close();

    return new JSONObject(data.toString());
}

From source file:com.raphfrk.craftproxyclient.net.auth.AuthManager.java

@SuppressWarnings("unchecked")
public static void authServer16(String hash) throws IOException {
    URL url;// ww w  .  java 2  s. c o  m
    String username;
    String accessToken;
    try {
        if (loginDetails == null) {
            throw new IOException("Not logged in");
        }

        try {
            username = URLEncoder.encode(getUsername(), "UTF-8");
            accessToken = URLEncoder.encode(getAccessToken(), "UTF-8");
            hash = URLEncoder.encode(hash, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new IOException("Username/password encoding error", e);
        }

        String urlString;
        urlString = sessionServer16 + "user=" + username + "&sessionId=" + accessToken + "&serverId=" + hash;
        url = new URL(urlString);
    } catch (MalformedURLException e) {
        throw new IOException("Auth server URL error", e);
    }
    HttpURLConnection con = (HttpURLConnection) url.openConnection();
    con.setInstanceFollowRedirects(false);
    con.setReadTimeout(5000);
    con.setConnectTimeout(5000);
    con.connect();

    if (con.getResponseCode() != 200) {
        throw new IOException("Auth server rejected username and password");
    }

    BufferedReader reader = new BufferedReader(
            new InputStreamReader(con.getInputStream(), StandardCharsets.UTF_8));
    try {
        String reply = reader.readLine();
        if (!"OK".equals(reply)) {
            throw new IOException("Auth server replied (" + reply + ")");
        }
    } finally {
        reader.close();
        con.disconnect();
    }
}

From source file:com.google.android.apps.gutenberg.provider.SyncAdapter.java

private static String getCookie(String authToken) throws IOException {
    HttpURLConnection connection = null;
    try {//w  ww.  j  a  va  2s.c o  m
        connection = (HttpURLConnection) new URL(
                BuildConfig.HOST + "/_ah/login?continue=http://localhost/&auth=" + authToken).openConnection();
        connection.setInstanceFollowRedirects(false);
        connection.connect();
        if (connection.getResponseCode() != 302) {
            Log.e(TAG, "Cannot fetch the cookie: " + connection.getResponseCode());
            return null;
        }
        String cookie = connection.getHeaderField("Set-Cookie");
        if (!cookie.contains("SACSID")) {
            return null;
        }
        return cookie;
    } finally {
        if (connection != null) {
            connection.disconnect();
        }
    }
}

From source file:net.andylizi.colormotd.anim.utils.AttributionUtil.java

private static String sendGet(String url, String param, String charset) {
    StringBuilder result = new StringBuilder(1024);
    BufferedReader in = null;// ww  w .j av a2s.co m
    try {
        String urlNameString = url + "?" + param;
        URL realUrl = new URL(urlNameString);
        HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
        conn.setRequestProperty("User-Agent", Main.getInstance().getDescription().getFullName());
        conn.setRequestProperty("Accept-Charset", charset);
        conn.setUseCaches(true);
        conn.setConnectTimeout(2000);
        conn.setReadTimeout(3000);
        conn.connect();
        in = new BufferedReader(new InputStreamReader(conn.getInputStream(), Charset.forName(charset)), 1024);
        String line;
        while ((line = in.readLine()) != null) {
            result.append(line);
        }
        conn.disconnect();
    } catch (Exception e) {
    } finally {
        try {
            if (in != null) {
                in.close();
            }
        } catch (Exception e2) {
        }
    }
    return result.toString();
}