Java Code Examples for org.apache.catalina.WebResource#getInputStream()

/**
 * Copy the contents of the specified input stream to the specified
 * output stream, and ensure that both streams are closed before returning
 * (even in the face of an exception).
 *
 * @param resource  The source resource
 * @param ostream   The output stream to write to
 * @param range     Range the client wanted to retrieve
 * @exception IOException if an input/output error occurs
 */
protected void copy(WebResource resource, ServletOutputStream ostream,
                  Range range)
    throws IOException {

    IOException exception = null;

    InputStream resourceInputStream = resource.getInputStream();
    InputStream istream =
        new BufferedInputStream(resourceInputStream, input);
    exception = copyRange(istream, ostream, range.start, range.end);

    // Clean up the input stream
    istream.close();

    // Rethrow any exception that has occurred
    if (exception != null)
        throw exception;

}
 

/**
 * Copy the contents of the specified input stream to the specified
 * output stream, and ensure that both streams are closed before returning
 * (even in the face of an exception).
 *
 * @param resource      The source resource
 * @param ostream       The output stream to write to
 * @param ranges        Enumeration of the ranges the client wanted to
 *                          retrieve
 * @param contentType   Content type of the resource
 * @exception IOException if an input/output error occurs
 */
protected void copy(WebResource resource, ServletOutputStream ostream,
                  Iterator<Range> ranges, String contentType)
    throws IOException {

    IOException exception = null;

    while ( (exception == null) && (ranges.hasNext()) ) {

        InputStream resourceInputStream = resource.getInputStream();
        try (InputStream istream = new BufferedInputStream(resourceInputStream, input)) {

            Range currentRange = ranges.next();

            // Writing MIME header.
            ostream.println();
            ostream.println("--" + mimeSeparation);
            if (contentType != null)
                ostream.println("Content-Type: " + contentType);
            ostream.println("Content-Range: bytes " + currentRange.start
                           + "-" + currentRange.end + "/"
                           + currentRange.length);
            ostream.println();

            // Printing content
            exception = copyRange(istream, ostream, currentRange.start,
                                  currentRange.end);
        }
    }

    ostream.println();
    ostream.print("--" + mimeSeparation + "--");

    // Rethrow any exception that has occurred
    if (exception != null)
        throw exception;

}
 

@Override
protected void processWebInfLib() throws LifecycleException {

    // Don't extract JAR files unless the application is deployed as a
    // packed WAR file.
    if (!super.isPackedWarFile()) {
        super.processWebInfLib();
        return;
    }

    File expansionTarget = getExpansionTarget();
    if (!expansionTarget.isDirectory()) {
        if (!expansionTarget.mkdirs()) {
            throw new LifecycleException(
                    sm.getString("extractingRoot.targetFailed", expansionTarget));
        }
    }

    WebResource[] possibleJars = listResources("/WEB-INF/lib", false);

    for (WebResource possibleJar : possibleJars) {
        if (possibleJar.isFile() && possibleJar.getName().endsWith(".jar")) {
            try {
                File dest = new File(expansionTarget, possibleJar.getName());
                dest = dest.getCanonicalFile();
                try (InputStream sourceStream = possibleJar.getInputStream();
                        OutputStream destStream= new FileOutputStream(dest)) {
                    IOTools.flow(sourceStream, destStream);
                }

                createWebResourceSet(ResourceSetType.CLASSES_JAR,
                        "/WEB-INF/classes", dest.toURI().toURL(), "/");
            } catch (IOException ioe) {
                throw new LifecycleException(
                        sm.getString("extractingRoot.jarFailed", possibleJar.getName()), ioe);
            }
        }
    }
}
 

private InputStream getWrappedClosedInputStream() throws IOException {
    StandardRoot root = new StandardRoot();
    root.setCachingAllowed(false);
    JarResourceSet jarResourceSet =
            new JarResourceSet(root, "/", "test/webresources/non-static-resources.jar", "/");
    WebResource webResource = jarResourceSet.getResource("/META-INF/MANIFEST.MF");
    InputStream wrapped = webResource.getInputStream();
    wrapped.close();
    return wrapped;
}
 

/**
 * Find the resource with the given name, and return an input stream
 * that can be used for reading it.  The search order is as described
 * for <code>getResource()</code>, after checking to see if the resource
 * data has been previously cached.  If the resource cannot be found,
 * return <code>null</code>.
 *
 * @param name Name of the resource to return an input stream for
 */
@Override
public InputStream getResourceAsStream(String name) {

    if (log.isDebugEnabled())
        log.debug("getResourceAsStream(" + name + ")");

    checkStateForResourceLoading(name);

    InputStream stream = null;

    boolean delegateFirst = delegate || filter(name, false);

    // (1) Delegate to parent if requested
    if (delegateFirst) {
        if (log.isDebugEnabled())
            log.debug("  Delegating to parent classloader " + parent);
        stream = parent.getResourceAsStream(name);
        if (stream != null) {
            if (log.isDebugEnabled())
                log.debug("  --> Returning stream from parent");
            return stream;
        }
    }

    // (2) Search local repositories
    if (log.isDebugEnabled())
        log.debug("  Searching local repositories");
    String path = nameToPath(name);
    WebResource resource = resources.getClassLoaderResource(path);
    if (resource.exists()) {
        stream = resource.getInputStream();
        trackLastModified(path, resource);
    }
    try {
        if (hasExternalRepositories && stream == null) {
            URL url = super.findResource(name);
            if (url != null) {
                stream = url.openStream();
            }
        }
    } catch (IOException e) {
        // Ignore
    }
    if (stream != null) {
        if (log.isDebugEnabled())
            log.debug("  --> Returning stream from local");
        return stream;
    }

    // (3) Delegate to parent unconditionally
    if (!delegateFirst) {
        if (log.isDebugEnabled())
            log.debug("  Delegating to parent classloader unconditionally " + parent);
        stream = parent.getResourceAsStream(name);
        if (stream != null) {
            if (log.isDebugEnabled())
                log.debug("  --> Returning stream from parent");
            return stream;
        }
    }

    // (4) Resource was not found
    if (log.isDebugEnabled())
        log.debug("  --> Resource not found, returning null");
    return null;
}