Example usage for java.net HttpURLConnection setUseCaches

List of usage examples for java.net HttpURLConnection setUseCaches

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Introduction

In this page you can find the example usage for java.net HttpURLConnection setUseCaches.

Prototype

public void setUseCaches(boolean usecaches)

Source Link

Document

Sets the value of the useCaches field of this URLConnection to the specified value.

Usage

From source file:Main.java

private static void post(String endpoint, Map<String, String> params) throws IOException {

    URL url;/*from   ww  w . ja v a  2s  . co m*/
    try {
        url = new URL(endpoint);
    } catch (MalformedURLException e) {
        throw new IllegalArgumentException("invalid url: " + endpoint);
    }
    StringBuilder bodyBuilder = new StringBuilder();
    Iterator<Map.Entry<String, String>> iterator = params.entrySet().iterator();
    // constructs the POST body using the parameters
    while (iterator.hasNext()) {
        Map.Entry<String, String> param = iterator.next();
        bodyBuilder.append(param.getKey()).append('=').append(param.getValue());
        if (iterator.hasNext()) {
            bodyBuilder.append('&');
        }
    }
    String body = bodyBuilder.toString();
    Log.v(TAG, "Posting '" + body + "' to " + url);
    byte[] bytes = body.getBytes();
    HttpURLConnection conn = null;
    try {
        Log.e("URL", "> " + url);
        conn = (HttpURLConnection) url.openConnection();
        conn.setDoOutput(true);
        conn.setUseCaches(false);
        conn.setFixedLengthStreamingMode(bytes.length);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
        // post the request
        OutputStream out = conn.getOutputStream();
        out.write(bytes);
        out.close();
        // handle the response
        int status = conn.getResponseCode();
        if (status != 200) {
            throw new IOException("Post failed with error code " + status);
        }
    } finally {
        if (conn != null) {
            conn.disconnect();
        }
    }
}

From source file:net.daporkchop.porkbot.util.HTTPUtils.java

private static HttpURLConnection createUrlConnection(@NonNull URL url) throws IOException {
    final HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setConnectTimeout(15000);
    connection.setReadTimeout(15000);/*from  www.j  a v a  2 s .c  o  m*/
    connection.setUseCaches(false);
    return connection;
}

From source file:Main.java

private static HttpURLConnection initHttpURLConn(String requestURL)
        throws MalformedURLException, IOException, ProtocolException {
    URL url = new URL(requestURL);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setConnectTimeout(TIME_OUT);
    connection.setReadTimeout(TIME_OUT);
    connection.setDoInput(true);// www .j  a  v  a 2  s .co  m
    connection.setDoOutput(true);
    connection.setUseCaches(false);
    connection.setRequestMethod("POST");
    connection.setRequestProperty("Charset", CHARSET);
    connection.setRequestProperty("connection", "keep-alive");
    return connection;
}

From source file:com.intellectualcrafters.plot.uuid.UUIDFetcher.java

private static HttpURLConnection createConnection() throws Exception {
    final URL url = new URL(PROFILE_URL);
    final HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("POST");
    connection.setRequestProperty("Content-Type", "application/json");
    connection.setUseCaches(false);
    connection.setDoInput(true);/*from   ww w .ja  v  a  2  s . c o m*/
    connection.setDoOutput(true);
    return connection;
}

From source file:com.fastbootmobile.encore.api.common.HttpGet.java

/**
 * Downloads the data from the provided URL.
 * @param inUrl The URL to get from//from  ww w. j  a  v a 2s  . c om
 * @param query The query field. '?' + query will be appended automatically, and the query data
 *              MUST be encoded properly.
 * @return A byte array of the data
 */
public static byte[] getBytes(String inUrl, String query, boolean cached)
        throws IOException, RateLimitException {
    final String formattedUrl = inUrl + (query.isEmpty() ? "" : ("?" + query));

    Log.d(TAG, "Formatted URL: " + formattedUrl);

    URL url = new URL(formattedUrl);
    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
    urlConnection.setRequestProperty("User-Agent", "OmniMusic/1.0-dev (http://www.omnirom.org)");
    urlConnection.setUseCaches(cached);
    urlConnection.setInstanceFollowRedirects(true);
    int maxStale = 60 * 60 * 24 * 28; // tolerate 4-weeks stale
    urlConnection.addRequestProperty("Cache-Control", "max-stale=" + maxStale);
    try {
        final int status = urlConnection.getResponseCode();
        // MusicBrainz returns 503 Unavailable on rate limit errors. Parse the JSON anyway.
        if (status == HttpURLConnection.HTTP_OK) {
            InputStream in = new BufferedInputStream(urlConnection.getInputStream());
            int contentLength = urlConnection.getContentLength();
            if (contentLength <= 0) {
                // No length? Let's allocate 100KB.
                contentLength = 100 * 1024;
            }
            ByteArrayBuffer bab = new ByteArrayBuffer(contentLength);
            BufferedInputStream bis = new BufferedInputStream(in);
            int character;

            while ((character = bis.read()) != -1) {
                bab.append(character);
            }
            return bab.toByteArray();
        } else if (status == HttpURLConnection.HTTP_NOT_FOUND) {
            // 404
            return new byte[] {};
        } else if (status == HttpURLConnection.HTTP_FORBIDDEN) {
            return new byte[] {};
        } else if (status == HttpURLConnection.HTTP_UNAVAILABLE) {
            throw new RateLimitException();
        } else if (status == HttpURLConnection.HTTP_MOVED_TEMP || status == HttpURLConnection.HTTP_MOVED_PERM
                || status == 307 /* HTTP/1.1 TEMPORARY REDIRECT */
                || status == HttpURLConnection.HTTP_SEE_OTHER) {
            // We've been redirected, follow the new URL
            final String followUrl = urlConnection.getHeaderField("Location");
            Log.e(TAG, "Redirected to: " + followUrl);
            return getBytes(followUrl, "", cached);
        } else {
            Log.e(TAG, "Error when fetching: " + formattedUrl + " (" + urlConnection.getResponseCode() + ")");
            return new byte[] {};
        }
    } finally {
        urlConnection.disconnect();
    }
}

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

/**
 * Connects to an HTTP resource using the post method.
 * @param url the URL to connect to.//from w ww . j a v a2 s .c o  m
 * @param requestProperties optional request properties, <code>null</code> if not required.
 * @param postData the data to post.
 * @return the resulting {@link HttpURLConnection}.
 * @throws IOException
 */
public static HttpURLConnection connectPost(final String url, final RequestProperty[] requestProperties,
        final byte[] postData) throws IOException {
    // setup connection
    HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
    connection.setDoOutput(true);
    connection.setUseCaches(false);
    connection.setRequestMethod(POST_METHOD);

    // send the post form
    connection.setFixedLengthStreamingMode(postData.length);
    addRequestProperties(connection, requestProperties);
    OutputStream outStream = connection.getOutputStream();
    outStream.write(postData);
    outStream.close();

    return connection;
}

From source file:com.google.android.gcm.demo.app.ServerUtilities.java

/**
 * Issue a POST request to the server.// w  ww .j  a  v a  2 s.c om
 *
 * @param endpoint POST address.
 * @param params request parameters.
 *
 * @throws IOException propagated from POST.
 */
private static void post(String endpoint, Map<String, String> params) throws IOException {
    URL url;
    try {
        url = new URL(endpoint);
    } catch (MalformedURLException e) {
        throw new IllegalArgumentException("invalid url: " + endpoint);
    }
    JSONObject jsonObj = new JSONObject(params);
    String body = jsonObj.toString();
    Log.v(TAG, "Posting '" + body + "' to " + url);
    byte[] bytes = body.getBytes();
    HttpURLConnection conn = null;
    try {
        conn = (HttpURLConnection) url.openConnection();
        conn.setDoOutput(true);
        conn.setUseCaches(false);
        conn.setFixedLengthStreamingMode(bytes.length);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "application/json");
        // post the request
        OutputStream out = conn.getOutputStream();
        out.write(bytes);
        out.close();
        // handle the response
        int status = conn.getResponseCode();
        if (status != 200) {
            throw new IOException("Post failed with error code " + status);
        }
    } finally {
        if (conn != null) {
            conn.disconnect();
        }
    }
}

From source file:lu.list.itis.dkd.aig.util.FusekiHttpHelper.java

/**
 * Delete specified dataset//ww  w.j a va2s  .com
 * 
 * @param dataSetName
 * @throws IOException
 * @throws HttpException
 */
public static void deleteDataSet(@NonNull String dataSetName) throws IOException, HttpException {
    logger.info("delete dataset: " + dataSetName);

    URL url = new URL(HOST + "/$/datasets/" + dataSetName);
    final HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
    httpConnection.setUseCaches(false);
    httpConnection.setRequestMethod("DELETE");
    httpConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

    // handle HTTP/HTTPS strange behaviour
    httpConnection.connect();
    httpConnection.disconnect();

    // handle response
    switch (httpConnection.getResponseCode()) {
    case HttpURLConnection.HTTP_OK:
        break;
    default:
        throw new HttpException(
                httpConnection.getResponseCode() + " message: " + httpConnection.getResponseMessage());
    }
}

From source file:lu.list.itis.dkd.aig.util.FusekiHttpHelper.java

/**
 * Check if specified dataset already exists on server
 * //from   w  w w .  j  a va 2  s .  c  o  m
 * @param dataSetName
 * @return boolean true if the dataset already exits, false if not
 * @throws IOException
 * @throws HttpException
 */
public static boolean chechIfExist(String dataSetName) throws IOException, HttpException {
    boolean exists = false;
    URL url = new URL(HOST + "/$/datasets/" + dataSetName);
    final HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
    httpConnection.setUseCaches(false);
    httpConnection.setRequestMethod("GET");

    // handle HTTP/HTTPS strange behaviour
    httpConnection.connect();
    httpConnection.disconnect();

    // handle response
    switch (httpConnection.getResponseCode()) {
    case HttpURLConnection.HTTP_OK:
        exists = true;
        break;
    case HttpURLConnection.HTTP_NOT_FOUND:
        break;
    default:
        throw new HttpException(
                httpConnection.getResponseCode() + " message: " + httpConnection.getResponseMessage());
    }
    return exists;
}

From source file:itdelatrisu.opsu.downloads.BloodcatServer.java

/**
 * Returns a JSON object from a URL.// ww  w  . j a  v  a2s .com
 * @param url the remote URL
 * @return the JSON object
 * @author Roland Illig (http://stackoverflow.com/a/4308662)
 */
public static JSONObject readJsonFromUrl(URL url) throws IOException {
    // open connection
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setConnectTimeout(Download.CONNECTION_TIMEOUT);
    conn.setReadTimeout(Download.READ_TIMEOUT);
    conn.setUseCaches(false);
    try {
        conn.connect();
    } catch (SocketTimeoutException e) {
        ErrorHandler.error("Connection to server timed out.", e, false);
        throw e;
    }

    if (Thread.interrupted())
        return null;

    // read JSON
    JSONObject json = null;
    try (InputStream in = conn.getInputStream()) {
        BufferedReader rd = new BufferedReader(new InputStreamReader(in));
        StringBuilder sb = new StringBuilder();
        int c;
        while ((c = rd.read()) != -1)
            sb.append((char) c);
        json = new JSONObject(sb.toString());
    } catch (SocketTimeoutException e) {
        ErrorHandler.error("Connection to server timed out.", e, false);
        throw e;
    } catch (JSONException e1) {
        ErrorHandler.error("Failed to create JSON object.", e1, true);
    }
    return json;
}