//
//  ========================================================================
//  Copyright (c) 1995-2019 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
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//  You may elect to redistribute this code under either of these licenses.
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package org.eclipse.jetty.server;

import java.io.IOException;
import java.nio.file.InvalidPathException;
import java.util.HashMap;
import java.util.Map;

import org.eclipse.jetty.http.CompressedContentFormat;
import org.eclipse.jetty.http.HttpContent;
import org.eclipse.jetty.http.HttpContent.ContentFactory;
import org.eclipse.jetty.http.MimeTypes;
import org.eclipse.jetty.http.ResourceHttpContent;
import org.eclipse.jetty.util.resource.Resource;
import org.eclipse.jetty.util.resource.ResourceFactory;

A HttpContent.Factory for transient content (not cached). The HttpContent's created by this factory are not intended to be cached, so memory limits for individual HttpOutput streams are enforced.
/** * A HttpContent.Factory for transient content (not cached). The HttpContent's created by * this factory are not intended to be cached, so memory limits for individual * HttpOutput streams are enforced. */
public class ResourceContentFactory implements ContentFactory { private final ResourceFactory _factory; private final MimeTypes _mimeTypes; private final CompressedContentFormat[] _precompressedFormats; public ResourceContentFactory(ResourceFactory factory, MimeTypes mimeTypes, CompressedContentFormat[] precompressedFormats) { _factory = factory; _mimeTypes = mimeTypes; _precompressedFormats = precompressedFormats; } @Override public HttpContent getContent(String pathInContext, int maxBufferSize) throws IOException { try { // try loading the content from our factory. Resource resource = _factory.getResource(pathInContext); HttpContent loaded = load(pathInContext, resource, maxBufferSize); return loaded; } catch (Throwable t) { // Any error has potential to reveal fully qualified path throw (InvalidPathException)new InvalidPathException(pathInContext, "Invalid PathInContext").initCause(t); } } private HttpContent load(String pathInContext, Resource resource, int maxBufferSize) throws IOException { if (resource == null || !resource.exists()) return null; if (resource.isDirectory()) return new ResourceHttpContent(resource, _mimeTypes.getMimeByExtension(resource.toString()), maxBufferSize); // Look for a precompressed resource or content String mt = _mimeTypes.getMimeByExtension(pathInContext); if (_precompressedFormats.length > 0) { // Is there a compressed resource? Map<CompressedContentFormat, HttpContent> compressedContents = new HashMap<>(_precompressedFormats.length); for (CompressedContentFormat format : _precompressedFormats) { String compressedPathInContext = pathInContext + format._extension; Resource compressedResource = _factory.getResource(compressedPathInContext); if (compressedResource != null && compressedResource.exists() && compressedResource.lastModified() >= resource.lastModified() && compressedResource.length() < resource.length()) compressedContents.put(format, new ResourceHttpContent(compressedResource, _mimeTypes.getMimeByExtension(compressedPathInContext), maxBufferSize)); } if (!compressedContents.isEmpty()) return new ResourceHttpContent(resource, mt, maxBufferSize, compressedContents); } return new ResourceHttpContent(resource, mt, maxBufferSize); } @Override public String toString() { return "ResourceContentFactory[" + _factory + "]@" + hashCode(); } }