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/*
* Copyright 2004 - 2012 Mirko Nasato and contributors
* 2016 - 2020 Simon Braconnier and contributors
*
* This file is part of JODConverter - Java OpenDocument Converter.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jodconverter.office;
import static java.lang.Math.toIntExact;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.Socket;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Map;
import javax.net.ssl.SSLContext;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.Validate;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.PrivateKeyDetails;
import org.apache.http.ssl.PrivateKeyStrategy;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.ssl.SSLContexts;
import org.jodconverter.ssl.SslConfig;
import org.jodconverter.task.OfficeTask;
/**
* A OnlineOfficeManagerPoolEntry is responsible to execute tasks submitted through a {@link
* OnlineOfficeManager} that does not depend on an office installation. It will send conversion
* request to a LibreOffice Online server and wait until the task is done or a configured task
* execution timeout is reached.
*
* @see OnlineOfficeManager
*/
class OnlineOfficeManagerPoolEntry extends AbstractOfficeManagerPoolEntry {
private final String connectionUrl;
private final SslConfig sslConfig;
private static final class SelectByAlias implements PrivateKeyStrategy {
private final String keyAlias;
@Override
public String chooseAlias(final Map aliases, final Socket socket) {
return aliases.keySet().stream()
.filter(key -> StringUtils.equalsIgnoreCase(key, keyAlias))
.findFirst()
.orElse(null);
}
public SelectByAlias(final String keyAlias) {
this.keyAlias = keyAlias;
}
}
private static final class TrustAllStrategy implements TrustStrategy {
private static final TrustAllStrategy INSTANCE = new TrustAllStrategy();
@Override
public boolean isTrusted(final X509Certificate[] chain, final String authType) {
return true;
}
}
// Taken from Spring org.springframework.util.ClassUtils class.
private static ClassLoader getDefaultClassLoader() {
ClassLoader cl = null;
try {
cl = Thread.currentThread().getContextClassLoader();
} catch (Throwable ex) {
// Cannot access thread context ClassLoader - falling back...
}
if (cl == null) {
// No thread context class loader -> use class loader of this class.
cl = OnlineOfficeManagerPoolEntry.class.getClassLoader();
if (cl == null) {
// getClassLoader() returning null indicates the bootstrap ClassLoader
try {
cl = ClassLoader.getSystemClassLoader();
} catch (Throwable ex) {
// Cannot access system ClassLoader - oh well, maybe the caller can live with null...
}
}
}
return cl;
}
// Taken from spring org.springframework.util.ResourceUtils class
private static File getFile(final URL url) {
try {
return new File(
new URI(StringUtils.replace(url.toString(), " ", "%20")).getSchemeSpecificPart());
} catch (URISyntaxException ex) {
// Fallback for URLs that are not valid URIs (should hardly ever happen).
return new File(url.getFile());
}
}
// Taken from spring org.springframework.util.ResourceUtils class
private static File getFile(final String resourceLocation) throws FileNotFoundException {
Validate.notNull(resourceLocation, "Resource location must not be null");
if (resourceLocation.startsWith("classpath:")) {
final String path = resourceLocation.substring("classpath:".length());
final String description = "class path resource [" + path + "]";
final ClassLoader cl = getDefaultClassLoader();
final URL url = (cl != null ? cl.getResource(path) : ClassLoader.getSystemResource(path));
if (url == null) {
throw new FileNotFoundException(
description + " cannot be resolved to absolute file path because it does not exist");
}
return getFile(url.toString());
}
try {
// try URL
return getFile(new URL(resourceLocation));
} catch (MalformedURLException ex) {
// no URL -> treat as file path
return new File(resourceLocation);
}
}
/**
* Creates a new pool entry with the specified configuration.
*
* @param connectionUrl The URL to the LibreOffice Online server.
* @param sslConfig The SSL configuration used to secure communication with LibreOffice Online
* server.
* @param config The entry configuration.
*/
public OnlineOfficeManagerPoolEntry(
final String connectionUrl,
final SslConfig sslConfig,
final OnlineOfficeManagerPoolEntryConfig config) {
super(config);
this.connectionUrl = connectionUrl;
this.sslConfig = sslConfig;
}
private String buildUrl(final String connectionUrl) throws MalformedURLException {
// An example URL is like:
// http://localhost:9980/lool/convert-to/docx
final URL url = new URL(connectionUrl);
final String path = url.toExternalForm().toLowerCase();
if (StringUtils.endsWithAny(path, "lool/convert-to", "lool/convert-to/")) {
return StringUtils.appendIfMissing(connectionUrl, "/");
} else if (StringUtils.endsWithAny(path, "lool", "lool/")) {
return StringUtils.appendIfMissing(connectionUrl, "/") + "convert-to/";
}
return StringUtils.appendIfMissing(connectionUrl, "/") + "lool/convert-to/";
}
private void configureKeyMaterial(final SSLContextBuilder sslBuilder)
throws UnrecoverableKeyException, NoSuchAlgorithmException, KeyStoreException,
CertificateException, IOException, NoSuchProviderException {
final KeyStore keystore =
loadStore(
sslConfig.getKeyStore(),
sslConfig.getKeyStorePassword(),
sslConfig.getKeyStoreType(),
sslConfig.getKeyStoreProvider());
if (keystore != null) {
sslBuilder.loadKeyMaterial(
keystore,
sslConfig.getKeyPassword() != null
? sslConfig.getKeyPassword().toCharArray()
: sslConfig.getKeyStorePassword().toCharArray(),
sslConfig.getKeyAlias() == null ? null : new SelectByAlias(sslConfig.getKeyAlias()));
}
}
private SSLConnectionSocketFactory configureSsl() throws OfficeException {
if (sslConfig == null || !sslConfig.isEnabled()) {
return null;
}
try {
final SSLContextBuilder sslBuilder = SSLContexts.custom();
sslBuilder.setProtocol(sslConfig.getProtocol());
configureKeyMaterial(sslBuilder);
configureTrustMaterial(sslBuilder);
final SSLContext sslcontext = sslBuilder.build();
return new SSLConnectionSocketFactory(
sslcontext,
sslConfig.getEnabledProtocols(),
sslConfig.getCiphers(),
sslConfig.isVerifyHostname()
? SSLConnectionSocketFactory.getDefaultHostnameVerifier()
: NoopHostnameVerifier.INSTANCE);
} catch (IOException
| KeyManagementException
| NoSuchAlgorithmException
| KeyStoreException
| CertificateException
| UnrecoverableKeyException
| NoSuchProviderException ex) {
throw new OfficeException("Unable to create SSL context.", ex);
}
}
private void configureTrustMaterial(final SSLContextBuilder sslBuilder)
throws NoSuchAlgorithmException, KeyStoreException, CertificateException, IOException,
NoSuchProviderException {
if (sslConfig.isTrustAll()) {
sslBuilder.loadTrustMaterial(null, TrustAllStrategy.INSTANCE);
} else {
final KeyStore truststore =
loadStore(
sslConfig.getTrustStore(),
sslConfig.getTrustStorePassword(),
sslConfig.getTrustStoreType(),
sslConfig.getTrustStoreProvider());
if (truststore != null) {
sslBuilder.loadTrustMaterial(truststore, null);
}
}
}
@Override
protected void doExecute(final OfficeTask task) throws OfficeException {
final SSLConnectionSocketFactory sslFactory = configureSsl();
try (CloseableHttpClient httpClient =
HttpClients.custom().setSSLSocketFactory(sslFactory).build()) {
// Use the task execution timeout as connection and socket timeout.
// TODO: Should the user be able to customize connection and socket timeout ?
final RequestConfig requestConfig =
new RequestConfig(
buildUrl(connectionUrl),
toIntExact(config.getTaskExecutionTimeout()),
toIntExact(config.getTaskExecutionTimeout()));
task.execute(new OnlineOfficeConnection(httpClient, requestConfig));
} catch (IOException ex) {
throw new OfficeException("Unable to create the HTTP client", ex);
}
}
@Override
protected void doStart() {
taskExecutor.setAvailable(true);
}
@Override
protected void doStop() {
// Nothing to stop here.
}
private KeyStore loadStore(
final String store,
final String storePassword,
final String storeType,
final String storeProvider)
throws NoSuchAlgorithmException, CertificateException, IOException, KeyStoreException,
NoSuchProviderException {
if (store != null) {
Validate.notNull(storePassword, "The password of store {0} must not be null", store);
KeyStore keyStore;
final String type = storeType == null ? KeyStore.getDefaultType() : storeType;
if (storeProvider == null) {
keyStore = KeyStore.getInstance(type);
} else {
keyStore = KeyStore.getInstance(type, storeProvider);
}
try (FileInputStream instream = new FileInputStream(getFile(store))) {
keyStore.load(instream, storePassword.toCharArray());
}
return keyStore;
}
return null;
}
}
