diff options
Diffstat (limited to 'sca-java-2.x/tags/sca-java-2.0-M5.1/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCServiceServlet.java')
-rw-r--r-- | sca-java-2.x/tags/sca-java-2.0-M5.1/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCServiceServlet.java | 381 |
1 files changed, 0 insertions, 381 deletions
diff --git a/sca-java-2.x/tags/sca-java-2.0-M5.1/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCServiceServlet.java b/sca-java-2.x/tags/sca-java-2.0-M5.1/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCServiceServlet.java deleted file mode 100644 index 1177940891..0000000000 --- a/sca-java-2.x/tags/sca-java-2.0-M5.1/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCServiceServlet.java +++ /dev/null @@ -1,381 +0,0 @@ -/* - * 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.tuscany.sca.binding.jsonrpc.provider; - -import java.io.BufferedReader; -import java.io.CharArrayWriter; -import java.io.IOException; -import java.io.InputStreamReader; -import java.io.OutputStream; -import java.io.UnsupportedEncodingException; -import java.math.BigInteger; -import java.net.URLDecoder; -import java.security.MessageDigest; -import java.util.Date; -import java.util.List; - -import javax.servlet.ServletConfig; -import javax.servlet.http.HttpServletRequest; -import javax.servlet.http.HttpServletResponse; -import javax.servlet.http.HttpSession; - -import org.apache.commons.codec.binary.Base64; -import org.apache.tuscany.sca.assembly.Binding; -import org.apache.tuscany.sca.interfacedef.Operation; -import org.apache.tuscany.sca.invocation.Message; -import org.apache.tuscany.sca.invocation.MessageFactory; -import org.apache.tuscany.sca.runtime.RuntimeEndpoint; -import org.jabsorb.JSONRPCBridge; -import org.jabsorb.JSONRPCResult; -import org.jabsorb.JSONRPCServlet; -import org.json.JSONArray; -import org.json.JSONException; -import org.json.JSONObject; -import org.oasisopen.sca.ServiceRuntimeException; - -/** - * Servlet that handles JSON-RPC requests invoking SCA services. - * - * There is an instance of this Servlet for each <binding.jsonrpc> - * - * @version $Rev$ $Date$ - */ -public class JSONRPCServiceServlet extends JSONRPCServlet { - private static final long serialVersionUID = 1L; - - transient MessageFactory messageFactory; - - transient Binding binding; - transient String serviceName; - transient Object serviceInstance; - transient RuntimeEndpoint endpoint; - transient Class<?> serviceInterface; - - public JSONRPCServiceServlet(MessageFactory messageFactory, - RuntimeEndpoint endpoint, - Class<?> serviceInterface, - Object serviceInstance) { - this.endpoint = endpoint; - this.messageFactory = messageFactory; - this.binding = endpoint.getBinding(); - this.serviceName = binding.getName(); - this.serviceInterface = serviceInterface; - this.serviceInstance = serviceInstance; - } - - /** - * Override to do nothing as the JSONRPCServlet is setup by the - * service method in this class. - */ - @Override - public void init(ServletConfig config) { - } - - @Override - public void service(HttpServletRequest request, HttpServletResponse response) throws IOException { - if ("smd".equals(request.getQueryString())) { - handleSMDRequest(request, response); - } else { - try { - handleServiceRequest(request, response); - - } catch(RuntimeException re) { - if (re.getCause() instanceof javax.security.auth.login.LoginException) { - response.setHeader("WWW-Authenticate", "BASIC realm=\"" + "ldap-realm" + "\""); - response.sendError(HttpServletResponse.SC_UNAUTHORIZED); - } - } finally { - HttpSession session = request.getSession(false); - if (session != null) { - session.removeAttribute("JSONRPCBridge"); - } - } - } - } - - private void handleServiceRequest(HttpServletRequest request, HttpServletResponse response) throws IOException { - // Decode using the charset in the request if it exists otherwise - // use UTF-8 as this is what all browser implementations use. - // The JSON-RPC-Java JavaScript client is ASCII clean so it - // although here we can correctly handle data from other clients - // that do not escape non ASCII data - String charset = request.getCharacterEncoding(); - if (charset == null) { - charset = "UTF-8"; - } - - CharArrayWriter data = new CharArrayWriter(); - if (request.getMethod().equals("GET")) { - // if using GET Support (see http://groups.google.com/group/json-rpc/web/json-rpc-over-http) - - //parse the GET QueryString - try { - String params = new String(Base64.decodeBase64(URLDecoder.decode(request.getParameter("params"),charset).getBytes())); - StringBuffer sb = new StringBuffer(); - sb.append("{"); - sb.append("\"method\": \"" + request.getParameter("method") + "\","); - sb.append("\"params\": " + params + ","); - sb.append("\"id\":" + request.getParameter("id")); - sb.append("}"); - - data.write(sb.toString().toCharArray(), 0, sb.length()); - } catch (Exception e) { - //FIXME Exceptions are not handled correctly here - // They should be reported to the client JavaScript as proper - // JavaScript exceptions. - throw new RuntimeException("Unable to parse request", e); - } - - } else { - // default POST style - BufferedReader in = new BufferedReader(new InputStreamReader(request.getInputStream(), charset)); - - // Read the request into charArray - char[] buf = new char[4096]; - int ret; - while ((ret = in.read(buf, 0, 4096)) != -1) { - data.write(buf, 0, ret); - } - } - - JSONObject jsonReq = null; - String method = null; - //parse the JSON payload - try { - jsonReq = new JSONObject(data.toString()); - method = jsonReq.getString("method"); - } catch (Exception e) { - //FIXME Exceptions are not handled correctly here - // They should be reported to the client JavaScript as proper - // JavaScript exceptions. - throw new RuntimeException("Unable to parse request", e); - } - - // check if it's a system request - // or a method invocation - byte[] bout; - try { - if (method.startsWith("system.")) { - bout = handleJSONRPCSystemInvocation(request, response, data.toString()); - } else { - bout = handleJSONRPCMethodInvocation(request, response, jsonReq); - } - } catch (JSONException e) { - throw new RuntimeException(e); - } - - // Send response to client - // Encode using UTF-8, although We are actually ASCII clean as - // all unicode data is JSON escaped using backslash u. This is - // less data efficient for foreign character sets but it is - // needed to support naughty browsers such as Konqueror and Safari - // which do not honour the charset set in the response - response.setContentType("text/plain;charset=utf-8"); - - //set Cache-Control to no-cache to avoid intermediary - //proxy/reverse-proxy caches and always hit the server - //that would identify if the value was current or not - response.setHeader("Cache-Control", "no-cache"); - response.setHeader("Expires", new Date(0).toGMTString()); - - //handle etag if using GET - if( request.getMethod().equals("GET")) { - String eTag = calculateETag(bout); - - // Test request for predicates. - String predicate = request.getHeader( "If-Match" ); - if (( predicate != null ) && ( !predicate.equals(eTag) )) { - // No match, should short circuit - response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); - return; - } - predicate = request.getHeader( "If-None-Match" ); - if (( predicate != null ) && ( predicate.equals(eTag) )) { - // Match, should short circuit - response.sendError(HttpServletResponse.SC_NOT_MODIFIED); - return; - } - - response.addHeader("ETag", eTag); - } - - OutputStream out = response.getOutputStream(); - out.write(bout); - out.flush(); - out.close(); - } - - /** - * handles requests for the SMD descriptor for a service - */ - protected void handleSMDRequest(HttpServletRequest request, HttpServletResponse response) throws IOException, UnsupportedEncodingException { - String serviceUrl = request.getRequestURL().toString(); - String smd = JavaToSmd.interfaceToSmd(serviceInterface, serviceUrl); - - response.setContentType("text/plain;charset=utf-8"); - OutputStream out = response.getOutputStream(); - byte[] bout = smd.getBytes("UTF-8"); - out.write(bout); - out.flush(); - out.close(); - } - - protected byte[] handleJSONRPCSystemInvocation(HttpServletRequest request, HttpServletResponse response, String requestData) throws IOException, - UnsupportedEncodingException, JSONException { - /* - * Create a new bridge for every request to avoid all the problems with - * JSON-RPC-Java storing the bridge in the session - */ - HttpSession session = request.getSession(); - - JSONRPCBridge jsonrpcBridge = new JSONRPCBridge(); - jsonrpcBridge.registerObject("Service", serviceInstance, serviceInterface); - session.setAttribute("JSONRPCBridge", jsonrpcBridge); - - org.json.JSONObject jsonReq = null; - JSONRPCResult jsonResp = null; - jsonReq = new org.json.JSONObject(requestData); - - String method = jsonReq.getString("method"); - if ((method != null) && (method.indexOf('.') < 0)) { - jsonReq.putOpt("method", "Service" + "." + method); - } - - // invoke the request - jsonResp = jsonrpcBridge.call(new Object[] {request}, jsonReq); - - return jsonResp.toString().getBytes("UTF-8"); - } - - protected byte[] handleJSONRPCMethodInvocation(HttpServletRequest request, HttpServletResponse response, JSONObject jsonReq) throws IOException, - UnsupportedEncodingException { - - String method = null; - Object[] args = null; - Object id = null; - try { - // Extract the method - method = jsonReq.getString("method"); - if ((method != null) && (method.indexOf('.') < 0)) { - jsonReq.putOpt("method", "Service" + "." + method); - } - - // Extract the arguments - JSONArray array = jsonReq.getJSONArray("params"); - args = new Object[array.length()]; - for (int i = 0; i < args.length; i++) { - args[i] = array.get(i); - } - id = jsonReq.get("id"); - - } catch (Exception e) { - throw new RuntimeException("Unable to find json method name", e); - } - - // invoke the request - Operation jsonOperation = findOperation(method); - Object result = null; - - - // Invoke the get operation on the service implementation - Message requestMessage = messageFactory.createMessage(); - requestMessage.setOperation(jsonOperation); - - requestMessage.getHeaders().add(request); - - requestMessage.setBody(args); - - //result = wire.invoke(jsonOperation, args); - Message responseMessage = null; - try { - responseMessage = endpoint.getInvocationChain(jsonOperation).getHeadInvoker().invoke(requestMessage); - } catch (RuntimeException re) { - if (re.getCause() instanceof javax.security.auth.login.LoginException) { - throw re; - } else { - //some other exception - JSONRPCResult errorResult = new JSONRPCResult(JSONRPCResult.CODE_REMOTE_EXCEPTION, id, re); - return errorResult.toString().getBytes("UTF-8"); - } - } - - if (!responseMessage.isFault()) { - //successful execution of the invocation - try { - result = responseMessage.getBody(); - JSONObject jsonResponse = new JSONObject(); - jsonResponse.put("result", result); - jsonResponse.putOpt("id", id); - //get response to send to client - return jsonResponse.toString().getBytes("UTF-8"); - } catch (Exception e) { - throw new ServiceRuntimeException("Unable to create JSON response", e); - } - } else { - //exception thrown while executing the invocation - Throwable exception = (Throwable)responseMessage.getBody(); - JSONRPCResult errorResult = new JSONRPCResult(JSONRPCResult.CODE_REMOTE_EXCEPTION, id, exception ); - return errorResult.toString().getBytes("UTF-8"); - } - - } - - /** - * Find the operation from the component service contract - * @param componentService - * @param method - * @return - */ - private Operation findOperation(String method) { - if (method.contains(".")) { - method = method.substring(method.lastIndexOf(".") + 1); - } - - List<Operation> operations = endpoint.getComponentServiceInterfaceContract().getInterface().getOperations(); - //endpoint.getComponentTypeServiceInterfaceContract().getInterface().getOperations(); - //componentService.getBindingProvider(binding).getBindingInterfaceContract().getInterface().getOperations(); - - - Operation result = null; - for (Operation o : operations) { - if (o.getName().equalsIgnoreCase(method)) { - result = o; - break; - } - } - - return result; - } - - private String calculateETag(byte[] content) { - String eTag = "invalid"; - try { - MessageDigest messageDigest = MessageDigest.getInstance("MD5"); - byte[] digest = messageDigest.digest(content); - BigInteger number = new BigInteger(1, digest); - StringBuffer sb = new StringBuffer('0'); - sb.append(number.toString(16)); - eTag = sb.toString(); - } catch(Exception e) { - //ignore, we will return random etag - eTag = Integer.toString((new java.util.Random()).nextInt(Integer.MAX_VALUE)); - } - return eTag; - } -} |