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/*
* Copyright 2012-2019 CodeLibs Project and the Others.
*
* 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.codelibs.fess.api.es;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Locale;
import java.util.UUID;
import javax.annotation.PostConstruct;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.connector.ClientAbortException;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.io.CopyUtil;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.curl.Curl.Method;
import org.codelibs.curl.CurlRequest;
import org.codelibs.curl.CurlResponse;
import org.codelibs.fess.Constants;
import org.codelibs.fess.api.BaseApiManager;
import org.codelibs.fess.exception.FessSystemException;
import org.codelibs.fess.exception.WebApiException;
import org.codelibs.fess.mylasta.action.FessUserBean;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.ResourceUtil;
import org.lastaflute.web.servlet.request.RequestManager;
import org.lastaflute.web.servlet.session.SessionManager;
public class EsApiManager extends BaseApiManager {
private static final String ADMIN_SERVER = "/admin/server_";
private static final Logger logger = LogManager.getLogger(EsApiManager.class);
protected String[] acceptedRoles = new String[] { "admin" };
public EsApiManager() {
setPathPrefix(ADMIN_SERVER);
}
@PostConstruct
public void register() {
if (logger.isInfoEnabled()) {
logger.info("Load " + this.getClass().getSimpleName());
}
ComponentUtil.getWebApiManagerFactory().add(this);
}
@Override
public boolean matches(final HttpServletRequest request) {
final String servletPath = request.getServletPath();
return servletPath.startsWith(pathPrefix);
}
@Override
public void process(final HttpServletRequest request, final HttpServletResponse response, final FilterChain chain) throws IOException,
ServletException {
final RequestManager requestManager = ComponentUtil.getRequestManager();
if (!requestManager.findUserBean(FessUserBean.class).map(user -> user.hasRoles(acceptedRoles)).orElse(Boolean.FALSE)) {
response.sendError(HttpServletResponse.SC_UNAUTHORIZED, "Unauthorized access: " + request.getServletPath());
return;
}
try {
getSessionManager().getAttribute(Constants.ES_API_ACCESS_TOKEN, String.class).ifPresent(token -> {
final String servletPath = request.getServletPath();
final String pathPrefix = ADMIN_SERVER + token;
if (!servletPath.startsWith(pathPrefix)) {
throw new WebApiException(HttpServletResponse.SC_FORBIDDEN, "Invalid access token.");
}
final String path;
final String value = servletPath.substring(pathPrefix.length());
if (!value.startsWith("/")) {
path = "/" + value;
} else {
path = value;
}
processRequest(request, response, path);
}).orElse(() -> {
throw new WebApiException(HttpServletResponse.SC_FORBIDDEN, "Invalid session.");
});
} catch (final WebApiException e) {
logger.debug("Web API access error. ", e);
e.sendError(response);
}
}
protected void processRequest(final HttpServletRequest request, final HttpServletResponse response, final String path) {
if (StringUtil.isNotBlank(path)) {
final String lowerPath = path.toLowerCase(Locale.ROOT);
if (lowerPath.endsWith(".html")) {
response.setContentType("text/html;charset=utf-8");
} else if (lowerPath.endsWith(".txt")) {
response.setContentType("text/plain");
} else if (lowerPath.endsWith(".css")) {
response.setContentType("text/css");
}
}
if (path.equals("/_plugin") || path.startsWith("/_plugin/")) {
processPluginRequest(request, response, path.replaceFirst("^/_plugin", StringUtil.EMPTY));
return;
}
final Method httpMethod = Method.valueOf(request.getMethod().toUpperCase(Locale.ROOT));
final CurlRequest curlRequest = ComponentUtil.getCurlHelper().request(httpMethod, path);
final String contentType = request.getHeader("Content-Type");
if (StringUtil.isNotEmpty(contentType)) {
curlRequest.header("Content-Type", contentType);
}
request.getParameterMap().entrySet().stream().forEach(entry -> {
if (entry.getValue().length > 1) {
curlRequest.param(entry.getKey(), String.join(",", entry.getValue()));
} else if (entry.getValue().length == 1) {
curlRequest.param(entry.getKey(), entry.getValue()[0]);
}
});
try (final CurlResponse curlResponse = curlRequest.onConnect((req, con) -> {
con.setDoOutput(true);
if (httpMethod != Method.GET) {
try (ServletInputStream in = request.getInputStream(); OutputStream out = con.getOutputStream()) {
CopyUtil.copy(in, out);
} catch (final IOException e) {
throw new WebApiException(HttpServletResponse.SC_BAD_REQUEST, e);
}
}
}).execute()) {
try (ServletOutputStream out = response.getOutputStream(); InputStream in = curlResponse.getContentAsStream()) {
response.setStatus(curlResponse.getHttpStatusCode());
writeHeaders(response);
CopyUtil.copy(in, out);
} catch (final ClientAbortException e) {
logger.debug("Client aborts this request.", e);
}
} catch (final Exception e) {
if (e.getCause() instanceof ClientAbortException) {
logger.debug("Client aborts this request.", e);
} else {
throw new WebApiException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e);
}
}
}
protected void processPluginRequest(final HttpServletRequest request, final HttpServletResponse response, final String path) {
Path filePath = ResourceUtil.getSitePath(path.replaceAll("\\.\\.+", StringUtil.EMPTY).replaceAll("/+", "/").split("/"));
if (Files.isDirectory(filePath)) {
filePath = filePath.resolve("index.html");
}
if (Files.exists(filePath)) {
try (InputStream in = Files.newInputStream(filePath); ServletOutputStream out = response.getOutputStream()) {
response.setStatus(HttpServletResponse.SC_OK);
writeHeaders(response);
CopyUtil.copy(in, out);
} catch (final ClientAbortException e) {
logger.debug("Client aborts this request.", e);
} catch (final IOException e) {
logger.error("Failed to read " + path + " from " + filePath);
throw new WebApiException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e);
}
} else {
try {
writeHeaders(response);
response.sendError(HttpServletResponse.SC_NOT_FOUND, path + " is not found.");
} catch (final ClientAbortException e) {
logger.debug("Client aborts this request.", e);
} catch (final IOException e) {
logger.error("Failed to read " + path + " from " + filePath);
throw new WebApiException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e);
}
}
}
public void setAcceptedRoles(final String[] acceptedRoles) {
this.acceptedRoles = acceptedRoles;
}
public String getServerPath() {
return getSessionManager().getAttribute(Constants.ES_API_ACCESS_TOKEN, String.class).map(token -> ADMIN_SERVER + token)
.orElseThrow(() -> new FessSystemException("Cannot create an access token."));
}
public void saveToken() {
getSessionManager().setAttribute(Constants.ES_API_ACCESS_TOKEN, UUID.randomUUID().toString().replace("-", ""));
}
private SessionManager getSessionManager() {
return ComponentUtil.getComponent(SessionManager.class);
}
@Override
protected void writeHeaders(final HttpServletResponse response) {
ComponentUtil.getFessConfig().getApiDashboardResponseHeaderList().forEach(e -> response.setHeader(e.getFirst(), e.getSecond()));
}
}
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