Java Code Examples for java.net.HttpURLConnection#getLastModified()

The following examples show how to use java.net.HttpURLConnection#getLastModified() . These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
@Override
public CacheEntry call() throws Exception {
    LOGGER.log(Level.FINE, "Attempting to fetch remote avatar: {0}", url);
    long start = System.nanoTime();
    try {
        HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
        try {
            connection.setConnectTimeout(10000);
            connection.setReadTimeout(30000);
            if (!connection.getContentType().startsWith("image/")) {
                return new CacheEntry(url);
            }
            int length = connection.getContentLength();
            // buffered stream should be no more than 16k if we know the length
            // if we don't know the length then 8k is what we will use
            length = length > 0 ? Math.min(16384, length) : 8192;
            try (InputStream is = connection.getInputStream();
                BufferedInputStream bis = new BufferedInputStream(is, length)) {
                BufferedImage image = ImageIO.read(bis);
                if (image == null) {
                    return new CacheEntry(url);
                }
                return new CacheEntry(url, image, connection.getLastModified());
            }
        } finally {
            connection.disconnect();
        }
    } catch (IOException e) {
        LOGGER.log(Level.INFO, e.getMessage(), e);
        return new CacheEntry(url);
    } finally {
        long end = System.nanoTime();
        long duration = TimeUnit.NANOSECONDS.toMillis(end - start);
        LOGGER.log(duration > 250 ? Level.INFO : Level.FINE, "Avatar lookup of {0} took {1}ms",
            new Object[]{url, duration}
        );
    }
}
 
Example 2
/**
 * isValid
 * 
 * @return boolean
 */
public boolean isValid() {
	if (timestamp == -1) {
		return false;
	}
	if (expires >= System.currentTimeMillis()) {
		return true;
	}
	try {
		URLConnection connection = getURI().toURL().openConnection();
		if (connection instanceof HttpURLConnection) {
			connection.setIfModifiedSince(timestamp);
			((HttpURLConnection) connection).setRequestMethod("HEAD"); //$NON-NLS-1$
		}
		connection.connect();
		if (connection instanceof HttpURLConnection) {
			HttpURLConnection httpConnection = (HttpURLConnection) connection;
			long lastModified = httpConnection.getLastModified();
			if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_NOT_MODIFIED || (lastModified != 0 && timestamp >= lastModified)) {
				expires = System.currentTimeMillis();
				long expiration = connection.getExpiration();
				long date = connection.getDate();
				if (expiration != 0 && date != 0 && expiration > date) {
					expires += (expiration - date);
				} else {
					expires += 10 * 1000; // 10 sec
				}
				return true;
			}
		}
	} catch (IOException e) {
		IdeLog.logError(CorePlugin.getDefault(), e);
	}
	return false;
}
 
Example 3
void updatePropertiesFromResponse(HttpURLConnection request) {
    // ETag
    this.getProperties().setEtag(request.getHeaderField(Constants.HeaderConstants.ETAG));

    // Last Modified
    if (0 != request.getLastModified()) {
        final Calendar lastModifiedCalendar = Calendar.getInstance(Utility.LOCALE_US);
        lastModifiedCalendar.setTimeZone(Utility.UTC_ZONE);
        lastModifiedCalendar.setTime(new Date(request.getLastModified()));
        this.getProperties().setLastModified(lastModifiedCalendar.getTime());
    }
}
 
Example 4
Source Project: azure-storage-android   File: CloudBlob.java    License: Apache License 2.0 5 votes vote down vote up
protected void updateEtagAndLastModifiedFromResponse(HttpURLConnection request) {
    // ETag
    this.getProperties().setEtag(request.getHeaderField(Constants.HeaderConstants.ETAG));

    // Last Modified
    if (0 != request.getLastModified()) {
        final Calendar lastModifiedCalendar = Calendar.getInstance(Utility.LOCALE_US);
        lastModifiedCalendar.setTimeZone(Utility.UTC_ZONE);
        lastModifiedCalendar.setTime(new Date(request.getLastModified()));
        this.getProperties().setLastModified(lastModifiedCalendar.getTime());
    }
}
 
Example 5
private void updatePropertiesFromResponse(HttpURLConnection request) {
    // ETag
    this.getProperties().setEtag(request.getHeaderField(Constants.HeaderConstants.ETAG));

    // Last Modified
    if (0 != request.getLastModified()) {
        final Calendar lastModifiedCalendar = Calendar.getInstance(Utility.LOCALE_US);
        lastModifiedCalendar.setTimeZone(Utility.UTC_ZONE);
        lastModifiedCalendar.setTime(new Date(request.getLastModified()));
        this.getProperties().setLastModified(lastModifiedCalendar.getTime());
    }
}
 
Example 6
private void updatePropertiesFromResponse(HttpURLConnection request) {
    // ETag
    this.getProperties().setEtag(request.getHeaderField(Constants.HeaderConstants.ETAG));

    // Last Modified
    if (0 != request.getLastModified()) {
        final Calendar lastModifiedCalendar = Calendar.getInstance(Utility.LOCALE_US);
        lastModifiedCalendar.setTimeZone(Utility.UTC_ZONE);
        lastModifiedCalendar.setTime(new Date(request.getLastModified()));
        this.getProperties().setLastModified(lastModifiedCalendar.getTime());
    }
}
 
Example 7
Source Project: azure-storage-android   File: CloudFile.java    License: Apache License 2.0 5 votes vote down vote up
protected void updateEtagAndLastModifiedFromResponse(HttpURLConnection request) {
    // ETag
    this.getProperties().setEtag(request.getHeaderField(Constants.HeaderConstants.ETAG));

    // Last Modified
    if (0 != request.getLastModified()) {
        final Calendar lastModifiedCalendar = Calendar.getInstance(Utility.LOCALE_US);
        lastModifiedCalendar.setTimeZone(Utility.UTC_ZONE);
        lastModifiedCalendar.setTime(new Date(request.getLastModified()));
        this.getProperties().setLastModified(lastModifiedCalendar.getTime());
    }
}
 
Example 8
Source Project: JWebAssembly   File: SpiderMonkey.java    License: Apache License 2.0 4 votes vote down vote up
/**
 * Check if there is a new version of the script engine
 * 
 * @throws IOException
 *             if any error occur
 */
private void download() throws IOException {
    boolean is32 = "32".equals( System.getProperty( "sun.arch.data.model" ) );
    String fileName;
    final String os = System.getProperty( "os.name", "" ).toLowerCase();
    if( os.contains( "windows" ) ) {
        fileName = is32 ? "win32" : "win64";
    } else if( os.contains( "mac" ) ) {
        fileName = is32 ? "mac" : "mac64";
    } else if( os.contains( "linux" ) ) {
        fileName = is32 ? "linux-i686" : "linux-x86_64";
    } else {
        throw new IllegalStateException( "Unknown OS: " + os );
    }
    File target = new File( System.getProperty( "java.io.tmpdir" ) + "/SpiderMonkey" );
    URL url = new URL( "https://archive.mozilla.org/pub/firefox/nightly/latest-mozilla-central/jsshell-" + fileName + ".zip" );
    System.out.println( "\tDownload: " + url );
    command = target.getAbsolutePath() + "/js";
    HttpURLConnection conn = (HttpURLConnection)url.openConnection();
    conn.setConnectTimeout( 5000 );
    if( target.exists() ) {
        conn.setIfModifiedSince( target.lastModified() );
    }
    InputStream input;
    try {
        input = conn.getInputStream();
    } catch( IOException ex ) {
        if( target.exists() ) {
            System.err.println( ex );
            return;
        }
        throw ex;
    }
    if( conn.getResponseCode() == HttpURLConnection.HTTP_NOT_MODIFIED ) {
        System.out.println( "\tUP-TP-DATE, use version from " + Instant.ofEpochMilli( target.lastModified() ) );
        return;
    }
    long lastModfied = conn.getLastModified();
    extractStream( input, false, target );
    target.setLastModified( lastModfied );
    System.out.println( "\tUse Version from " + Instant.ofEpochMilli( lastModfied ) );
}
 
Example 9
private URLConnection openConnection(URL aSource) throws IOException {

            // set up the URL connection
            URLConnection connection = aSource.openConnection();
            // modify the headers
            // NB: things like user authentication could go in here too.
            if (hasTimestamp) {
                connection.setIfModifiedSince(timestamp);
            }

            // in case the plugin manager is its own project, this can become an authenticator
            boolean isSecureProcotol = "https".equalsIgnoreCase(aSource.getProtocol());
            boolean isAuthInfoSet = !Strings.isNullOrEmpty(aSource.getUserInfo());
            if (isAuthInfoSet) {
                if (!isSecureProcotol) {
                    throw new IOException("Basic auth is only supported for HTTPS!");
                }
                String basicAuth = Base64.encodeBytes(aSource.getUserInfo().getBytes(StandardCharsets.UTF_8));
                connection.setRequestProperty("Authorization", "Basic " + basicAuth);
            }

            if (connection instanceof HttpURLConnection) {
                ((HttpURLConnection) connection).setInstanceFollowRedirects(false);
                connection.setUseCaches(true);
                connection.setConnectTimeout(5000);
            }
            connection.setRequestProperty("ES-Version", Version.CURRENT.toString());
            connection.setRequestProperty("ES-Build-Hash", Build.CURRENT.hashShort());
            connection.setRequestProperty("User-Agent", "elasticsearch-plugin-manager");

            // connect to the remote site (may take some time)
            connection.connect();

            // First check on a 301 / 302 (moved) response (HTTP only)
            if (connection instanceof HttpURLConnection) {
                HttpURLConnection httpConnection = (HttpURLConnection) connection;
                int responseCode = httpConnection.getResponseCode();
                if (responseCode == HttpURLConnection.HTTP_MOVED_PERM ||
                        responseCode == HttpURLConnection.HTTP_MOVED_TEMP ||
                        responseCode == HttpURLConnection.HTTP_SEE_OTHER) {
                    String newLocation = httpConnection.getHeaderField("Location");
                    URL newURL = new URL(newLocation);
                    if (!redirectionAllowed(aSource, newURL)) {
                        return null;
                    }
                    return openConnection(newURL);
                }
                // next test for a 304 result (HTTP only)
                long lastModified = httpConnection.getLastModified();
                if (responseCode == HttpURLConnection.HTTP_NOT_MODIFIED
                        || (lastModified != 0 && hasTimestamp && timestamp >= lastModified)) {
                    // not modified so no file download. just return
                    // instead and trace out something so the user
                    // doesn't think that the download happened when it
                    // didn't
                    return null;
                }
                // test for 401 result (HTTP only)
                if (responseCode == HttpURLConnection.HTTP_UNAUTHORIZED) {
                    String message = "HTTP Authorization failure";
                    throw new IOException(message);
                }
            }

            //REVISIT: at this point even non HTTP connections may
            //support the if-modified-since behaviour -we just check
            //the date of the content and skip the write if it is not
            //newer. Some protocols (FTP) don't include dates, of
            //course.
            return connection;
        }
 
Example 10
@Override
protected Long getLastModifiedForScheme(URI uri) {
	getLogger()
			.warn(MessageFormat
					.format("The URI [{0}] seems to represent an absolute HTTP or HTTPS URL. "
							+ "Getting the last modification timestamp is only possible "
							+ "if the URL is accessible "
							+ "and if the server returns the [Last-Modified] header correctly. "
							+ "This method is not reliable and is likely to fail. "
							+ "In this case the last modification timestamp will be assumed to be unknown.",
							uri));
	try {
		final URL url = uri.toURL();
		try {
			final URLConnection urlConnection = url.openConnection();
			if (urlConnection instanceof HttpURLConnection) {
				final HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;
				httpURLConnection.setInstanceFollowRedirects(true);
				final long lastModified = httpURLConnection
						.getLastModified();
				if (lastModified == 0) {
					getLogger()
							.error(MessageFormat
									.format("Could not retrieve the last modification timestamp for the URI [{0}] from the HTTP URL connection. "
											+ "The [Last-Modified] header was probably not set correctly.",
											uri));

				} else {
					getLogger()
							.debug(MessageFormat
									.format("HTTP connection to the URI [{0}] returned the last modification timestamp [{1,date,yyyy-MM-dd HH:mm:ss.SSS}].",
											uri, lastModified));
					return lastModified;
				}
			} else {
				getLogger()
						.error(MessageFormat
								.format("URL connection for the URI [{0}] is not a HTTP or HTTPS connection, can't read the [Last-Modified] header.",
										uri));
			}
		} catch (IOException ioex) {
			getLogger()
					.error(MessageFormat.format(
							"Error opening the URL connection for the URI [{0}].",
							uri), ioex);
		}
	} catch (MalformedURLException murlex) {
		getLogger().error(MessageFormat.format("URI [{0}].", uri), murlex);
	}
	getLogger()
			.warn(MessageFormat
					.format("Last modification of the URI [{0}] is not known.",
							uri));
	return null;
}