Example usage for java.net URLConnection getLastModified

Introduction

In this page you can find the example usage for java.net URLConnection getLastModified.

Prototype

public long getLastModified() 

Source Link

Document

Returns the value of the last-modified header field.

Usage

From source file:ru.appliedtech.template.velocity.VelocityResourceLoader.java

@Override
public long getLastModified(Resource resource) {
    IResourcesService resources = AC.getInsecureService(IResourcesService.class);
    try {/*from w  ww  .ja  va  2 s . c o  m*/
        URLConnection connection = resources.getURL(resource.getName()).openConnection();
        return connection.getLastModified();
    } catch (AppException | IOException e) {
        throw new ResourceNotFoundException(e);
    }
}

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From source file:com.github.jknack.handlebars.io.URLTemplateSource.java

/**
 * Read the last modified date from a resource.
 *
 * @param resource The resource./*from  w w  w .j  a  v a2s. com*/
 * @return The last modified date from a resource.
 * @throws IOException
 */
private long lastModified(final URL resource) {
    URLConnection uc = null;
    try {
        uc = resource.openConnection();
        return uc.getLastModified();
    } catch (IOException ex) {
        Handlebars.warn("Can't get last modified date of: %s", resource);
        return -1;
    } finally {
        try {
            if (uc != null) {
                // http://stackoverflow.com/questions/2057351/how-do-i-get-the-last-modification-time-of
                // -a-java-resource
                InputStream is = uc.getInputStream();
                if (is != null) {
                    is.close();
                }
            }
        } catch (IOException e) {
            Handlebars.warn("Can't close: %s", resource);
        }
    }
}

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From source file:com.datos.vfs.provider.url.UrlFileObject.java

/**
 * Returns the last modified time of this file.
 *///w w w.  j  a  v a  2 s  . c  o m
@Override
protected long doGetLastModifiedTime() throws Exception {
    final URLConnection conn = url.openConnection();
    final InputStream in = conn.getInputStream();
    try {
        return conn.getLastModified();
    } finally {
        in.close();
    }
}

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From source file:org.josso.tooling.gshell.install.provider.maven2.MavenFileObject.java

/**
 * Returns the last modified time of this file.
 *//*from   ww  w.j  a va2 s .  co  m*/
protected long doGetLastModifiedTime() throws Exception {
    final URLConnection conn = uri.toURL().openConnection();
    final InputStream in = conn.getInputStream();
    try {
        return conn.getLastModified();
    } finally {
        in.close();
    }
}

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From source file:annis.gui.servlets.ResourceServlet.java

@Override
@SuppressWarnings("unchecked")
public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    OutputStream outStream = response.getOutputStream();

    String completePath = request.getPathInfo();

    if (completePath == null) {
        response.sendError(404, "must provide a valid and existing path with a vistype");
        return;/*from   w w w  .  ja  v  a 2 s. c om*/
    }

    // remove trailing /
    completePath = completePath.substring(1);

    String[] pathComponents = completePath.split("/");

    String vistype = pathComponents[0];

    if (pathComponents.length < 2) {
        response.sendError(404, "must provide a valid and existing path");
        return;
    }

    String path = StringUtils.join(Arrays.copyOfRange(pathComponents, 1, pathComponents.length), "/");

    // get the visualizer for this vistype
    ResourcePlugin vis = resourceRegistry.get(vistype);
    if (vis == null) {
        response.sendError(500, "There is no resource with the short name " + vistype);
    } else if (path.endsWith(".class")) {
        response.sendError(403, "illegal class path access");
    } else {
        URL resource = vis.getClass().getResource(path);
        if (resource == null) {
            response.sendError(404, path + " not found");
        } else {
            // check if it is new
            URLConnection resourceConnection = resource.openConnection();
            long resourceLastModified = resourceConnection.getLastModified();
            long requestLastModified = request.getDateHeader("If-Modified-Since");
            if (requestLastModified != -1 && resourceLastModified <= requestLastModified) {
                response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
            } else {
                response.addDateHeader("Last-Modified", resourceLastModified);
                if ("localhost".equals(request.getServerName())) {
                    // does always expire right now
                    response.addDateHeader("Expires", new Date().getTime());
                } else {
                    // expires in one minute per default
                    response.addDateHeader("Expires", new Date().getTime() + 60000);
                }
                // not in cache, stream out
                String mimeType = getServletContext().getMimeType(path);
                response.setContentType(mimeType);
                if (mimeType.startsWith("text/")) {
                    response.setCharacterEncoding("UTF-8");
                }
                OutputStream bufferedOut = new BufferedOutputStream(outStream);
                InputStream resourceInStream = new BufferedInputStream(resource.openStream());

                try {
                    int v = -1;
                    while ((v = resourceInStream.read()) != -1) {
                        bufferedOut.write(v);
                    }
                } finally {
                    resourceInStream.close();
                    bufferedOut.flush();
                    outStream.flush();
                }
            }
        }
    }

}

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From source file:bboss.org.apache.velocity.runtime.resource.loader.URLResourceLoader.java

/**
 * Checks to see when a resource was last modified
 *
 * @param resource Resource the resource to check
 * @return long The time when the resource was last modified or 0 if the file can't be reached
 *///w ww .  ja va2s.co  m
public long getLastModified(Resource resource) {
    // get the previously used root
    String name = resource.getName();
    String root = (String) templateRoots.get(name);

    try {
        // get a connection to the URL
        URL u = new URL(root + name);
        URLConnection conn = u.openConnection();
        tryToSetTimeout(conn);
        return conn.getLastModified();
    } catch (IOException ioe) {
        // the file is not reachable at its previous address
        String msg = "URLResourceLoader: '" + name + "' is no longer reachable at '" + root + "'";
        log.error(msg, ioe);
        throw new ResourceNotFoundException(msg, ioe);
    }
}

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From source file:org.apache.velocity.runtime.resource.loader.URLResourceLoader.java

/**
 * Checks to see when a resource was last modified
 *
 * @param resource Resource the resource to check
 * @return long The time when the resource was last modified or 0 if the file can't be reached
 *///ww w.j  a  v  a 2s  . c o m
public long getLastModified(Resource resource) {
    // get the previously used root
    String name = resource.getName();
    String root = (String) templateRoots.get(name);

    try {
        // get a connection to the URL
        URL u = new URL(root + name);
        URLConnection conn = u.openConnection();
        tryToSetTimeout(conn);
        return conn.getLastModified();
    } catch (IOException ioe) {
        // the file is not reachable at its previous address
        String msg = "URLResourceLoader: '" + name + "' is no longer reachable at '" + root + "'";
        Logger.error(this, msg, ioe);
        throw new ResourceNotFoundException(msg, ioe);
    }
}

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From source file:org.mycore.common.content.MCRURLContent.java

@Override
public String getETag() throws IOException {
    URLConnection openConnection = url.openConnection();
    openConnection.connect();//from  w  ww .  ja  va2  s  . com
    String eTag = openConnection.getHeaderField("ETag");
    if (eTag != null) {
        return eTag;
    }
    long lastModified = openConnection.getLastModified();
    long length = openConnection.getContentLengthLong();
    eTag = getSimpleWeakETag(url.toString(), length, lastModified);
    return eTag == null ? null : eTag.substring(2);
}

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From source file:com.haulmont.cuba.web.sys.CubaWebJarsHandler.java

@Override
public boolean handleRequest(VaadinSession session, VaadinRequest request, VaadinResponse response)
        throws IOException {
    String path = request.getPathInfo();

    if (StringUtils.isEmpty(path) || StringUtils.isNotEmpty(path) && !path.startsWith(VAADIN_WEBJARS_PREFIX)) {
        return false;
    }/*from   www  . j a  va2s  .c  o m*/

    log.trace("WebJar resource requested: {}", path.replace(VAADIN_WEBJARS_PREFIX, ""));

    String errorMessage = checkResourcePath(path);
    if (StringUtils.isNotEmpty(errorMessage)) {
        log.warn(errorMessage);
        response.sendError(HttpServletResponse.SC_FORBIDDEN, errorMessage);
        return false;
    }

    URL resourceUrl = getStaticResourceUrl(path);

    if (resourceUrl == null) {
        resourceUrl = getClassPathResourceUrl(path);
    }

    if (resourceUrl == null) {
        String msg = String.format("Requested WebJar resource is not found: %s", path);
        response.sendError(HttpServletResponse.SC_NOT_FOUND, msg);
        log.warn(msg);
        return false;
    }

    String resourceName = getResourceName(path);
    String mimeType = servletContext.getMimeType(resourceName);
    response.setContentType(mimeType != null ? mimeType : FileTypesHelper.DEFAULT_MIME_TYPE);

    String cacheControl = "public, max-age=0, must-revalidate";
    int resourceCacheTime = getCacheTime(resourceName);
    if (resourceCacheTime > 0) {
        cacheControl = "max-age=" + String.valueOf(resourceCacheTime);
    }
    response.setHeader("Cache-Control", cacheControl);
    response.setDateHeader("Expires", System.currentTimeMillis() + (resourceCacheTime * 1000));

    InputStream inputStream = null;
    try {
        URLConnection connection = resourceUrl.openConnection();
        long lastModifiedTime = connection.getLastModified();
        // Remove milliseconds to avoid comparison problems (milliseconds
        // are not returned by the browser in the "If-Modified-Since"
        // header).
        lastModifiedTime = lastModifiedTime - lastModifiedTime % 1000;
        response.setDateHeader("Last-Modified", lastModifiedTime);

        if (browserHasNewestVersion(request, lastModifiedTime)) {
            response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
            return true;
        }

        inputStream = connection.getInputStream();

        copy(inputStream, response.getOutputStream());

        return true;
    } finally {
        if (inputStream != null) {
            inputStream.close();
        }
    }
}

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From source file:org.voyanttools.trombone.input.source.UriInputSource.java

/**
 * Create a new instance with the specified URI.
 * /*ww  w .j  a v  a2  s.  c  om*/
 * @param uri the URI associated with this input source
 * @throws IOException
 *             thrown when there's a problem creating or accessing header
 *             information for the URI
 * @throws MalformedURLException
 *             thrown if the URI is malformed
 */
public UriInputSource(URI uri) throws IOException {
    this.uri = uri;
    this.metadata = new DocumentMetadata();
    this.metadata.setLocation(uri.toString());

    this.metadata.setSource(Source.URI);

    String path = uri.getPath();
    if (path.isEmpty() || path.equals("/")) { // no path, use host
        metadata.setTitle(uri.getHost());
    } else if (path.endsWith("/")) { // ends in slash, use full path
        metadata.setTitle(path);
    } else { // try to use file part of URI
        metadata.setTitle(new File(path).getName());
    }

    StringBuilder idBuilder = new StringBuilder(uri.toString());

    // establish connection to find other and default metadata
    URLConnection c = null;
    try {
        c = getURLConnection(uri, 15000, 10000);

        // last modified of file
        long modified = c.getLastModified();
        this.metadata.setModified(modified);
        idBuilder.append(modified);

        // try and get length for id
        int length = c.getContentLength();
        idBuilder.append(length);

        String format = c.getContentType();
        if (format != null && format.isEmpty() == false) {
            idBuilder.append(format);
            DocumentFormat docFormat = DocumentFormat.fromContentType(format);
            if (docFormat != DocumentFormat.UNKNOWN) {
                this.metadata.setDefaultFormat(docFormat);
            }
        }

    } finally {
        if (c != null && c instanceof HttpURLConnection) {
            ((HttpURLConnection) c).disconnect();
        }
    }

    this.id = DigestUtils.md5Hex(idBuilder.toString());
}

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