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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.dubbo.rpc.protocol.http;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.remoting.RemotingServer;
import org.apache.dubbo.remoting.http.HttpBinder;
import org.apache.dubbo.remoting.http.HttpHandler;
import org.apache.dubbo.rpc.ProtocolServer;
import org.apache.dubbo.rpc.RpcContext;
import org.apache.dubbo.rpc.RpcException;
import org.apache.dubbo.rpc.protocol.AbstractProxyProtocol;
import com.googlecode.jsonrpc4j.HttpException;
import com.googlecode.jsonrpc4j.JsonRpcClientException;
import com.googlecode.jsonrpc4j.JsonRpcServer;
import com.googlecode.jsonrpc4j.spring.JsonProxyFactoryBean;
import org.apache.dubbo.rpc.service.GenericService;
import org.apache.dubbo.rpc.support.ProtocolUtils;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.remoting.RemoteAccessException;
import org.springframework.remoting.support.RemoteInvocation;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.SocketTimeoutException;
import java.util.ArrayList;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import static org.apache.dubbo.rpc.Constants.GENERIC_KEY;
public class HttpProtocol extends AbstractProxyProtocol {
public static final String ACCESS_CONTROL_ALLOW_ORIGIN_HEADER = "Access-Control-Allow-Origin";
public static final String ACCESS_CONTROL_ALLOW_METHODS_HEADER = "Access-Control-Allow-Methods";
public static final String ACCESS_CONTROL_ALLOW_HEADERS_HEADER = "Access-Control-Allow-Headers";
private final Map skeletonMap = new ConcurrentHashMap<>();
private HttpBinder httpBinder;
public HttpProtocol() {
super(HttpException.class, JsonRpcClientException.class);
}
public void setHttpBinder(HttpBinder httpBinder) {
this.httpBinder = httpBinder;
}
@Override
public int getDefaultPort() {
return 80;
}
private class InternalHandler implements HttpHandler {
private boolean cors;
public InternalHandler(boolean cors) {
this.cors = cors;
}
@Override
public void handle(HttpServletRequest request, HttpServletResponse response)
throws ServletException {
String uri = request.getRequestURI();
JsonRpcServer skeleton = skeletonMap.get(uri);
if (cors) {
response.setHeader(ACCESS_CONTROL_ALLOW_ORIGIN_HEADER, "*");
response.setHeader(ACCESS_CONTROL_ALLOW_METHODS_HEADER, "POST");
response.setHeader(ACCESS_CONTROL_ALLOW_HEADERS_HEADER, "*");
}
if (request.getMethod().equalsIgnoreCase("OPTIONS")) {
response.setStatus(200);
} else if (request.getMethod().equalsIgnoreCase("POST")) {
RpcContext.getContext().setRemoteAddress(request.getRemoteAddr(), request.getRemotePort());
try {
skeleton.handle(request.getInputStream(), response.getOutputStream());
} catch (Throwable e) {
throw new ServletException(e);
}
} else {
response.setStatus(500);
}
}
}
@Override
protected Runnable doExport(final T impl, Class type, URL url) throws RpcException {
String addr = getAddr(url);
ProtocolServer protocolServer = serverMap.get(addr);
if (protocolServer == null) {
RemotingServer remotingServer = httpBinder.bind(url, new InternalHandler(url.getParameter("cors", false)));
serverMap.put(addr, new ProxyProtocolServer(remotingServer));
}
final String path = url.getAbsolutePath();
final String genericPath = path + "/" + GENERIC_KEY;
ObjectMapper mapper = new ObjectMapper();
mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
JsonRpcServer skeleton = new JsonRpcServer(mapper, impl, type);
JsonRpcServer genericServer = new JsonRpcServer(mapper, impl, GenericService.class);
skeletonMap.put(path, skeleton);
skeletonMap.put(genericPath, genericServer);
return () -> {
skeletonMap.remove(path);
skeletonMap.remove(genericPath);
};
}
@SuppressWarnings("unchecked")
@Override
protected T doRefer(final Class serviceType, URL url) throws RpcException {
final String generic = url.getParameter(GENERIC_KEY);
final boolean isGeneric = ProtocolUtils.isGeneric(generic) || serviceType.equals(GenericService.class);
JsonProxyFactoryBean jsonProxyFactoryBean = new JsonProxyFactoryBean();
JsonRpcProxyFactoryBean jsonRpcProxyFactoryBean = new JsonRpcProxyFactoryBean(jsonProxyFactoryBean);
jsonRpcProxyFactoryBean.setRemoteInvocationFactory((methodInvocation) -> {
RemoteInvocation invocation = new JsonRemoteInvocation(methodInvocation);
if (isGeneric) {
invocation.addAttribute(GENERIC_KEY, generic);
}
return invocation;
});
String key = url.setProtocol("http").toIdentityString();
if (isGeneric) {
key = key + "/" + GENERIC_KEY;
}
jsonRpcProxyFactoryBean.setServiceUrl(key);
jsonRpcProxyFactoryBean.setServiceInterface(serviceType);
jsonProxyFactoryBean.afterPropertiesSet();
return (T) jsonProxyFactoryBean.getObject();
}
protected int getErrorCode(Throwable e) {
if (e instanceof RemoteAccessException) {
e = e.getCause();
}
if (e != null) {
Class cls = e.getClass();
if (SocketTimeoutException.class.equals(cls)) {
return RpcException.TIMEOUT_EXCEPTION;
} else if (IOException.class.isAssignableFrom(cls)) {
return RpcException.NETWORK_EXCEPTION;
} else if (ClassNotFoundException.class.isAssignableFrom(cls)) {
return RpcException.SERIALIZATION_EXCEPTION;
}
if (e instanceof HttpProtocolErrorCode) {
return ((HttpProtocolErrorCode) e).getErrorCode();
}
}
return super.getErrorCode(e);
}
@Override
public void destroy() {
super.destroy();
for (String key : new ArrayList<>(serverMap.keySet())) {
ProtocolServer server = serverMap.remove(key);
if (server != null) {
try {
if (logger.isInfoEnabled()) {
logger.info("Close jsonrpc server " + server.getUrl());
}
server.close();
} catch (Throwable t) {
logger.warn(t.getMessage(), t);
}
}
}
}
}