diff options
author | lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68> | 2008-09-11 04:10:13 +0000 |
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committer | lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68> | 2008-09-11 04:10:13 +0000 |
commit | a72fcfa3adf5be93bcf62e8ed26c08d10939b364 (patch) | |
tree | ebe3e388f11a71335f38b120a11d83be3cbc95d7 /branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main | |
parent | 1ac507b3dc36ffa3340f66fe85cf626bfcf18831 (diff) |
Branch before trunk cleanup
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@694106 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main')
9 files changed, 1327 insertions, 0 deletions
diff --git a/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCBindingInvoker.java b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCBindingInvoker.java new file mode 100644 index 0000000000..a9fff462fa --- /dev/null +++ b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCBindingInvoker.java @@ -0,0 +1,45 @@ +/* + * 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 org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.invocation.Message; + +/** + * Invoker for the JSONRPC Binding + * + * @version $Rev$ $Date$ + */ +public class JSONRPCBindingInvoker implements Invoker { + Operation operation; + String uri; + + public JSONRPCBindingInvoker(Operation operation, String uri) { + this.operation = operation; + this.uri = uri; + } + + public Message invoke(Message msg) { + // TODO Auto-generated method stub + return null; + } + +} diff --git a/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCBindingProviderFactory.java b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCBindingProviderFactory.java new file mode 100644 index 0000000000..eb85453bbb --- /dev/null +++ b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCBindingProviderFactory.java @@ -0,0 +1,64 @@ +/* + * 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 org.apache.tuscany.sca.binding.jsonrpc.JSONRPCBinding; +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.host.http.ServletHost; +import org.apache.tuscany.sca.host.http.ServletHostExtensionPoint; +import org.apache.tuscany.sca.provider.BindingProviderFactory; +import org.apache.tuscany.sca.provider.ReferenceBindingProvider; +import org.apache.tuscany.sca.provider.ServiceBindingProvider; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentReference; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; + +/** + * JSON-RPC Provider Factory + * + * @version $Rev$ $Date$ + */ +public class JSONRPCBindingProviderFactory implements BindingProviderFactory<JSONRPCBinding> { + + private ServletHost servletHost; + + public JSONRPCBindingProviderFactory(ExtensionPointRegistry extensionPoints) { + ServletHostExtensionPoint servletHosts = extensionPoints.getExtensionPoint(ServletHostExtensionPoint.class); + this.servletHost = servletHosts.getServletHosts().get(0); + } + + public ReferenceBindingProvider createReferenceBindingProvider(RuntimeComponent component, + RuntimeComponentReference reference, + JSONRPCBinding binding) { + + return new JSONRPCReferenceBindingProvider(component, reference, binding); + } + + public ServiceBindingProvider createServiceBindingProvider(RuntimeComponent component, + RuntimeComponentService service, + JSONRPCBinding binding) { + return new JSONRPCServiceBindingProvider(component, service, binding, servletHost); + } + + public Class<JSONRPCBinding> getModelType() { + return JSONRPCBinding.class; + } + +} diff --git a/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCReferenceBindingProvider.java b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCReferenceBindingProvider.java new file mode 100644 index 0000000000..e2528f59e5 --- /dev/null +++ b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCReferenceBindingProvider.java @@ -0,0 +1,70 @@ +/* + * 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 org.apache.tuscany.sca.binding.jsonrpc.JSONRPCBinding; +import org.apache.tuscany.sca.interfacedef.InterfaceContract; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.provider.ReferenceBindingProvider; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentReference; + +/** + * Implementation of the JSONRPC Binding Provider for References + * + * @version $Rev$ $Date$ + */ +public class JSONRPCReferenceBindingProvider implements ReferenceBindingProvider { + + private RuntimeComponentReference reference; + private JSONRPCBinding binding; + + public JSONRPCReferenceBindingProvider(RuntimeComponent component, + RuntimeComponentReference reference, + JSONRPCBinding binding) { + this.reference = reference; + this.binding = binding; + + } + + public InterfaceContract getBindingInterfaceContract() { + return reference.getInterfaceContract(); + } + + public Invoker createInvoker(Operation operation) { + return new JSONRPCBindingInvoker(operation, binding.getURI()); + } + + public void start() { + // TODO Auto-generated method stub + + } + + public void stop() { + // TODO Auto-generated method stub + + } + + public boolean supportsOneWayInvocation() { + return false; + } + +} diff --git a/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCServiceBindingProvider.java b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCServiceBindingProvider.java new file mode 100644 index 0000000000..8d9f8193e9 --- /dev/null +++ b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCServiceBindingProvider.java @@ -0,0 +1,184 @@ +/* + * 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.net.URI; +import java.util.ArrayList; +import java.util.List; + +import org.apache.tuscany.sca.binding.jsonrpc.JSONRPCBinding; +import org.apache.tuscany.sca.databinding.javabeans.SimpleJavaDataBinding; +import org.apache.tuscany.sca.databinding.json.JSONDataBinding; +import org.apache.tuscany.sca.host.http.ServletHost; +import org.apache.tuscany.sca.interfacedef.DataType; +import org.apache.tuscany.sca.interfacedef.Interface; +import org.apache.tuscany.sca.interfacedef.InterfaceContract; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.interfacedef.java.JavaInterface; +import org.apache.tuscany.sca.provider.ServiceBindingProvider; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; + +/** + * Implementation of the JSONRPC Binding Provider for Services + * + * @version $Rev$ $Date$ + */ +public class JSONRPCServiceBindingProvider implements ServiceBindingProvider { + + // Path to the scaDomain.js script + // Note: this is the same as the Ajax binding to keep the client code + // the same for clients using either the ajax or jsonrpc binding + private static final String SCA_DOMAIN_SCRIPT = "/SCADomain/scaDomain.js"; + + private RuntimeComponent component; + private RuntimeComponentService service; + private InterfaceContract serviceContract; + private JSONRPCBinding binding; + private ServletHost servletHost; + private List<String> servletMappings = new ArrayList<String>(); + private String domainScriptMapping; + + public JSONRPCServiceBindingProvider(RuntimeComponent component, + RuntimeComponentService service, + JSONRPCBinding binding, + ServletHost servletHost) { + this.component = component; + this.service = service; + this.binding = binding; + this.servletHost = servletHost; + + //clone the service contract to avoid databinding issues + try { + this.serviceContract = (InterfaceContract)service.getInterfaceContract().clone(); + } catch(CloneNotSupportedException e) { + this.serviceContract = service.getInterfaceContract(); + } + + setDataBinding(serviceContract.getInterface()); + } + + public InterfaceContract getBindingInterfaceContract() { + return service.getInterfaceContract(); + } + + public boolean supportsOneWayInvocation() { + return false; + } + + public void start() { + // Set default databinding to json + serviceContract.getInterface().resetDataBinding(JSONDataBinding.NAME); + + // Determine the service business interface + Class<?> serviceInterface = getTargetJavaClass(serviceContract.getInterface()); + + // Create a Java proxy to the target service + Object proxy = component.getComponentContext().createSelfReference(serviceInterface, service).getService(); + + // Create and register a Servlet for this service + JSONRPCServiceServlet serviceServlet = + new JSONRPCServiceServlet(binding, service, serviceContract, serviceInterface, proxy); + String mapping = binding.getURI(); + if (!mapping.endsWith("/")) { + mapping += "/"; + } + if (!mapping.endsWith("*")) { + mapping += "*"; + } + + servletHost.addServletMapping(mapping, serviceServlet); + servletMappings.add(mapping); + servletHost.addServletMapping(binding.getURI(), serviceServlet); + servletMappings.add(binding.getURI()); + + // Register service to scaDomain.js + int port; + URI uri = URI.create(servletHost.getURLMapping(binding.getURI()).toString()); + port = uri.getPort(); + if (port == -1) { + port = servletHost.getDefaultPort(); + } + + // get the ScaDomainScriptServlet, if it doesn't yet exist create one + // this uses removeServletMapping / addServletMapping as there is no getServletMapping facility + domainScriptMapping = URI.create("http://localhost:" + port + SCA_DOMAIN_SCRIPT).toString(); + ScaDomainScriptServlet scaDomainServlet = + (ScaDomainScriptServlet)servletHost.getServletMapping(domainScriptMapping); + if (scaDomainServlet == null) { + scaDomainServlet = new ScaDomainScriptServlet(); + servletHost.addServletMapping(domainScriptMapping, scaDomainServlet); + } + + // Add this service to the SCA Domain Script Servlet + scaDomainServlet.addService(binding.getName()); + } + + public void stop() { + + // Remove the Servlet mappings we've added + for (String mapping: servletMappings) { + servletHost.removeServletMapping(mapping); + } + + // Unregister the service from the SCA Domain Script Servlet + ScaDomainScriptServlet scaDomainServlet = (ScaDomainScriptServlet) servletHost.getServletMapping(domainScriptMapping); + if (scaDomainServlet != null) { + scaDomainServlet.removeService(binding.getName()); + + // Remove the Servlet if there's no more registered services + if (scaDomainServlet.getServiceNames().isEmpty()) { + servletHost.removeServletMapping(domainScriptMapping); + } + } + + } + + private Class<?> getTargetJavaClass(Interface targetInterface) { + // TODO: right now assume that the target is always a Java + // Implementation. Need to figure out how to generate Java + // Interface in cases where the target is not a Java Implementation + return ((JavaInterface)targetInterface).getJavaClass(); + } + + private void setDataBinding(Interface interfaze) { + List<Operation> operations = interfaze.getOperations(); + for (Operation operation : operations) { + operation.setDataBinding(JSONDataBinding.NAME); + DataType<List<DataType>> inputType = operation.getInputType(); + if (inputType != null) { + List<DataType> logical = inputType.getLogical(); + for (DataType inArg : logical) { + if (!SimpleJavaDataBinding.NAME.equals(inArg.getDataBinding())) { + inArg.setDataBinding(JSONDataBinding.NAME); + } + } + } + DataType outputType = operation.getOutputType(); + if (outputType != null) { + if (!SimpleJavaDataBinding.NAME.equals(outputType.getDataBinding())) { + outputType.setDataBinding(JSONDataBinding.NAME); + } + } + } + } + + +} diff --git a/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCServiceServlet.java b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCServiceServlet.java new file mode 100644 index 0000000000..c0d0415f91 --- /dev/null +++ b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JSONRPCServiceServlet.java @@ -0,0 +1,282 @@ +/* + * 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.lang.reflect.InvocationTargetException; +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.tuscany.sca.assembly.Binding; +import org.apache.tuscany.sca.interfacedef.InterfaceContract; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; +import org.apache.tuscany.sca.runtime.RuntimeWire; +import org.json.JSONArray; +import org.json.JSONObject; +import org.osoa.sca.ServiceRuntimeException; + +import com.metaparadigm.jsonrpc.JSONRPCBridge; +import com.metaparadigm.jsonrpc.JSONRPCResult; +import com.metaparadigm.jsonrpc.JSONRPCServlet; + +/** + * 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 Binding binding; + transient String serviceName; + transient Object serviceInstance; + transient RuntimeComponentService componentService; + transient InterfaceContract serviceContract; + transient Class<?> serviceInterface; + + public JSONRPCServiceServlet(Binding binding, + RuntimeComponentService componentService, + InterfaceContract serviceContract, + Class<?> serviceInterface, + Object serviceInstance) { + this.binding = binding; + this.serviceName = binding.getName(); + this.componentService = componentService; + this.serviceContract = serviceContract; + 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); + } finally { + HttpSession session = request.getSession(false); + if (session != null) { + session.removeAttribute("JSONRPCBridge"); + } + } + } + } + + private void handleServiceRequest(HttpServletRequest request, HttpServletResponse response) + throws IOException { + // 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"); + OutputStream out = response.getOutputStream(); + + // 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"; + } + BufferedReader in = new BufferedReader(new InputStreamReader(request.getInputStream(), charset)); + + // Read the request + CharArrayWriter data = new CharArrayWriter(); + 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; + 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; + if (method.startsWith("system.")) { + bout = handleJSONRPCSystemInvocation(request, response, data.toString()); + } else { + bout = handleJSONRPCMethodInvocation(request, response, jsonReq); + } + + // Send response to client + 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 { + /* + * 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; + com.metaparadigm.jsonrpc.JSONRPCResult jsonResp = null; + try { + jsonReq = new org.json.JSONObject(requestData); + } catch (java.text.ParseException e) { + throw new RuntimeException("Unable to parse request", e); + } + + 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 + RuntimeWire wire = componentService.getRuntimeWire(binding, serviceContract); + Operation jsonOperation = findOperation(method); + Object result = null; + + try { + JSONObject jsonResponse = new JSONObject(); + result = wire.invoke(jsonOperation, args); + + try { + 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); + } + } catch (InvocationTargetException e) { + JSONRPCResult errorResult = new JSONRPCResult(JSONRPCResult.CODE_REMOTE_EXCEPTION, id, e.getCause() ); + return errorResult.toString().getBytes("UTF-8"); + } catch(RuntimeException e) { + JSONRPCResult errorResult = new JSONRPCResult(JSONRPCResult.CODE_REMOTE_EXCEPTION, id, e.getCause()); + 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 = serviceContract.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; + } +} diff --git a/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JavaToSmd.java b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JavaToSmd.java new file mode 100644 index 0000000000..64339fda7b --- /dev/null +++ b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/JavaToSmd.java @@ -0,0 +1,56 @@ +/* + * 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.lang.reflect.Method; + +/** + * Utility class to create a Simple Method Description (SMD) descriptor + * from a Java class. See http://dojo.jot.com/SMD. + * + * TODO: Change to work from the Tuscany Interface instead of a Java class + * + * @version $Rev$ $Date$ + */ +class JavaToSmd { + + static String interfaceToSmd(Class<?> klazz, String serviceUrl) { + String name = klazz.getSimpleName(); + Method[] methods = klazz.getMethods(); + + StringBuffer smdSb = new StringBuffer(); + smdSb.append("{\"SMDVersion\":\".1\",\"objectName\":\"" + name + "\",\"serviceType\":\"JSON-RPC\",\"serviceURL\":\""+ serviceUrl + "\",\"methods\":["); + for (int i = 0; i < methods.length; i++) { + if (i != 0) smdSb.append(","); + Class<?>[] params = methods[i].getParameterTypes(); + smdSb.append("{\"name\":\""+methods[i].getName() + "\",\"parameters\":["); + for (int j = 0; j < params.length; j++) { + if (j != 0) smdSb.append(","); + // right now Dojo doesn't look at the type value, so we'll default it to STRING + // also, since we can't introspect the method parameter names we'll just create an incrementing parameter name + smdSb.append("{\"name\":\"param" + j + "\",\"type\":\"STRING\"}"); + } + smdSb.append("]}"); + } + smdSb.append("]}"); + + return smdSb.toString(); + } + +} diff --git a/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/ScaDomainScriptServlet.java b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/ScaDomainScriptServlet.java new file mode 100644 index 0000000000..999588abf1 --- /dev/null +++ b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/java/org/apache/tuscany/sca/binding/jsonrpc/provider/ScaDomainScriptServlet.java @@ -0,0 +1,114 @@ +/* + * 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.IOException; +import java.io.InputStream; +import java.net.URL; +import java.util.ArrayList; +import java.util.List; + +import javax.servlet.ServletOutputStream; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; + +/** + * Servlet to handle requests for the scaDomain.js script. + * + * This script wrappers the JSON-RPC-Java jsonrpc.js script + * adding in at the bottom the JavaScript to create and initialize + * the variables representing the SCA services. + * + * @version $Rev$ $Date$ + */ +public class ScaDomainScriptServlet extends HttpServlet { + private static final long serialVersionUID = 1L; + + protected transient List<String> serviceNames; + + public ScaDomainScriptServlet() { + serviceNames = new ArrayList<String>(); + } + + @Override + public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException { + + ServletOutputStream os = response.getOutputStream(); + + os.println(); + os.println("/* Apache Tuscany scaDomain.js Header */"); + os.println(); + + writeJSONRPCJavaScript(os); + writeScaDomainCode(os, request.getServletPath()); + } + + /** + * Creates a JavaScript variable within the scaDomain script for each SCA service and + * initializes its value with the JSON-RPC client to invoke the serverside service. + */ + protected void writeScaDomainCode(ServletOutputStream out, String path) throws IOException { + out.println(); + out.println("/* Apache Tuscany scaDomain.js Footer */"); + out.println(); + out.println("function scaDomain() {}"); + + // remove the leading slash '/' character + path = path.substring(1); + + for (String serviceName : serviceNames) { + out.println(); + + // A slight hack to make the service function available with a variable named 'serviceName' + // to do that the JSONRpcClient is added to the scaDomain and then the service function is got from that + out.println("scaDomain." + serviceName + " = " + "new JSONRpcClient(\"" + serviceName + "\");"); + out.println(serviceName + " = scaDomain." + serviceName + ".Service;"); + } + + out.println(); + out.println("/** End of Apache Tuscany scaDomain.js */"); + out.println(); + } + + /** + * Reads the jsonrpc.js script from the classpath and adds its contents to the output stream. + */ + protected void writeJSONRPCJavaScript(ServletOutputStream os) throws IOException { + URL url = getClass().getResource("jsonrpc.js"); + InputStream is = url.openStream(); + int i; + while ((i = is.read()) != -1) { + os.write(i); + } + } + + public void addService(String serviceName) { + serviceNames.add(serviceName); + } + + public void removeService(String serviceName) { + serviceNames.remove(serviceName); + } + + public List<String> getServiceNames() { + return serviceNames; + } + +} diff --git a/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.BindingProviderFactory b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.BindingProviderFactory new file mode 100644 index 0000000000..4767358e7a --- /dev/null +++ b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/resources/META-INF/services/org.apache.tuscany.sca.provider.BindingProviderFactory @@ -0,0 +1,19 @@ +# 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.
+
+# Implementation class for the binding extension
+org.apache.tuscany.sca.binding.jsonrpc.provider.JSONRPCBindingProviderFactory;model=org.apache.tuscany.sca.binding.jsonrpc.JSONRPCBinding
diff --git a/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/resources/org/apache/tuscany/sca/binding/jsonrpc/provider/jsonrpc.js b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/resources/org/apache/tuscany/sca/binding/jsonrpc/provider/jsonrpc.js new file mode 100644 index 0000000000..d837bab91c --- /dev/null +++ b/branches/trunk-20080910/modules/binding-jsonrpc-runtime/src/main/resources/org/apache/tuscany/sca/binding/jsonrpc/provider/jsonrpc.js @@ -0,0 +1,493 @@ +/* + * JSON-RPC JavaScript client + * + * $Id: jsonrpc.js,v 1.36.2.3 2006/03/08 15:09:37 mclark Exp $ + * + * Copyright (c) 2003-2004 Jan-Klaas Kollhof + * Copyright (c) 2005 Michael Clark, Metaparadigm Pte Ltd + * + * This code is based on Jan-Klaas' JavaScript o lait library (jsolait). + * + * 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. + * + */ + +/* + * Modifications for Apache Tuscany: + * - JSONRpcClient_createMethod changed so callback is last arg + */ + +/* escape a character */ + +escapeJSONChar = +function escapeJSONChar(c) +{ + if(c == "\"" || c == "\\") return "\\" + c; + else if (c == "\b") return "\\b"; + else if (c == "\f") return "\\f"; + else if (c == "\n") return "\\n"; + else if (c == "\r") return "\\r"; + else if (c == "\t") return "\\t"; + var hex = c.charCodeAt(0).toString(16); + if(hex.length == 1) return "\\u000" + hex; + else if(hex.length == 2) return "\\u00" + hex; + else if(hex.length == 3) return "\\u0" + hex; + else return "\\u" + hex; +}; + + +/* encode a string into JSON format */ + +escapeJSONString = +function escapeJSONString(s) +{ + /* The following should suffice but Safari's regex is b0rken + (doesn't support callback substitutions) + return "\"" + s.replace(/([^\u0020-\u007f]|[\\\"])/g, + escapeJSONChar) + "\""; + */ + + /* Rather inefficient way to do it */ + var parts = s.split(""); + for(var i=0; i < parts.length; i++) { + var c =parts[i]; + if(c == '"' || + c == '\\' || + c.charCodeAt(0) < 32 || + c.charCodeAt(0) >= 128) + parts[i] = escapeJSONChar(parts[i]); + } + return "\"" + parts.join("") + "\""; +}; + + +/* Marshall objects to JSON format */ + +toJSON = function toJSON(o) +{ + if(o == null) { + return "null"; + } else if(o.constructor == String) { + return escapeJSONString(o); + } else if(o.constructor == Number) { + return o.toString(); + } else if(o.constructor == Boolean) { + return o.toString(); + } else if(o.constructor == Date) { + return '{javaClass: "java.util.Date", time: ' + o.valueOf() +'}'; + } else if(o.constructor == Array) { + var v = []; + for(var i = 0; i < o.length; i++) v.push(toJSON(o[i])); + return "[" + v.join(", ") + "]"; + } else { + var v = []; + for(attr in o) { + if(o[attr] == null) v.push("\"" + attr + "\": null"); + else if(typeof o[attr] == "function"); /* skip */ + else v.push(escapeJSONString(attr) + ": " + toJSON(o[attr])); + } + return "{" + v.join(", ") + "}"; + } +}; + + +/* JSONRpcClient constructor */ + +JSONRpcClient = +function JSONRpcClient_ctor(serverURL, user, pass, objectID) +{ + this.serverURL = serverURL; + this.user = user; + this.pass = pass; + this.objectID = objectID; + + /* Add standard methods */ + if(this.objectID) { + this._addMethods(["listMethods"]); + var req = this._makeRequest("listMethods", []); + } else { + this._addMethods(["system.listMethods"]); + var req = this._makeRequest("system.listMethods", []); + } + var m = this._sendRequest(req); + this._addMethods(m); +}; + + +/* JSONRpcCLient.Exception */ + +JSONRpcClient.Exception = +function JSONRpcClient_Exception_ctor(code, message, javaStack) +{ + this.code = code; + var name; + if(javaStack) { + this.javaStack = javaStack; + var m = javaStack.match(/^([^:]*)/); + if(m) name = m[0]; + } + if(name) this.name = name; + else this.name = "JSONRpcClientException"; + this.message = message; +}; + +JSONRpcClient.Exception.CODE_REMOTE_EXCEPTION = 490; +JSONRpcClient.Exception.CODE_ERR_CLIENT = 550; +JSONRpcClient.Exception.CODE_ERR_PARSE = 590; +JSONRpcClient.Exception.CODE_ERR_NOMETHOD = 591; +JSONRpcClient.Exception.CODE_ERR_UNMARSHALL = 592; +JSONRpcClient.Exception.CODE_ERR_MARSHALL = 593; + +JSONRpcClient.Exception.prototype = new Error(); + +JSONRpcClient.Exception.prototype.toString = +function JSONRpcClient_Exception_toString(code, msg) +{ + return this.name + ": " + this.message; +}; + + +/* Default top level exception handler */ + +JSONRpcClient.default_ex_handler = +function JSONRpcClient_default_ex_handler(e) { alert(e); }; + + +/* Client settable variables */ + +JSONRpcClient.toplevel_ex_handler = JSONRpcClient.default_ex_handler; +JSONRpcClient.profile_async = false; +JSONRpcClient.max_req_active = 1; +JSONRpcClient.requestId = 1; + + +/* JSONRpcClient implementation */ + +JSONRpcClient.prototype._createMethod = +function JSONRpcClient_createMethod(methodName) +{ + var fn=function() + { + var args = []; + var callback = null; + for(var i=0;i<arguments.length;i++) args.push(arguments[i]); + +/* TUSCANY change callback to be last arg instead of first to match binding.ajax + if(typeof args[0] == "function") callback = args.shift(); +*/ + if(typeof args[arguments.length-1] == "function") callback = args.pop(); + + var req = fn.client._makeRequest.call(fn.client, fn.methodName, + args, callback); + if(callback == null) { + return fn.client._sendRequest.call(fn.client, req); + } else { + JSONRpcClient.async_requests.push(req); + JSONRpcClient.kick_async(); + return req.requestId; + } + }; + fn.client = this; + fn.methodName = methodName; + return fn; +}; + +JSONRpcClient.prototype._addMethods = +function JSONRpcClient_addMethods(methodNames) +{ + for(var i=0; i<methodNames.length; i++) { + var obj = this; + var names = methodNames[i].split("."); + for(var n=0; n<names.length-1; n++) { + var name = names[n]; + if(obj[name]) { + obj = obj[name]; + } else { + obj[name] = new Object(); + obj = obj[name]; + } + } + var name = names[names.length-1]; + if(!obj[name]) { + var method = this._createMethod(methodNames[i]); + obj[name] = method; + } + } +}; + +JSONRpcClient._getCharsetFromHeaders = +function JSONRpcClient_getCharsetFromHeaders(http) +{ + try { + var contentType = http.getResponseHeader("Content-type"); + var parts = contentType.split(/\s*;\s*/); + for(var i =0; i < parts.length; i++) { + if(parts[i].substring(0, 8) == "charset=") + return parts[i].substring(8, parts[i].length); + } + } catch (e) {} + return "UTF-8"; /* default */ +}; + +/* Async queue globals */ +JSONRpcClient.async_requests = []; +JSONRpcClient.async_inflight = {}; +JSONRpcClient.async_responses = []; +JSONRpcClient.async_timeout = null; +JSONRpcClient.num_req_active = 0; + +JSONRpcClient._async_handler = +function JSONRpcClient_async_handler() +{ + JSONRpcClient.async_timeout = null; + + while(JSONRpcClient.async_responses.length > 0) { + var res = JSONRpcClient.async_responses.shift(); + if(res.canceled) continue; + if(res.profile) res.profile.dispatch = new Date(); + try { + res.cb(res.result, res.ex, res.profile); + } catch(e) { + JSONRpcClient.toplevel_ex_handler(e); + } + } + + while(JSONRpcClient.async_requests.length > 0 && + JSONRpcClient.num_req_active < JSONRpcClient.max_req_active) { + var req = JSONRpcClient.async_requests.shift(); + if(req.canceled) continue; + req.client._sendRequest.call(req.client, req); + } +}; + +JSONRpcClient.kick_async = +function JSONRpcClient_kick_async() +{ + if(JSONRpcClient.async_timeout == null) + JSONRpcClient.async_timeout = + setTimeout(JSONRpcClient._async_handler, 0); +}; + +JSONRpcClient.cancelRequest = +function JSONRpcClient_cancelRequest(requestId) +{ + /* If it is in flight then mark it as canceled in the inflight map + and the XMLHttpRequest callback will discard the reply. */ + if(JSONRpcClient.async_inflight[requestId]) { + JSONRpcClient.async_inflight[requestId].canceled = true; + return true; + } + + /* If its not in flight yet then we can just mark it as canceled in + the the request queue and it will get discarded before being sent. */ + for(var i in JSONRpcClient.async_requests) { + if(JSONRpcClient.async_requests[i].requestId == requestId) { + JSONRpcClient.async_requests[i].canceled = true; + return true; + } + } + + /* It may have returned from the network and be waiting for its callback + to be dispatched, so mark it as canceled in the response queue + and the response will get discarded before calling the callback. */ + for(var i in JSONRpcClient.async_responses) { + if(JSONRpcClient.async_responses[i].requestId == requestId) { + JSONRpcClient.async_responses[i].canceled = true; + return true; + } + } + + return false; +}; + +JSONRpcClient.prototype._makeRequest = +function JSONRpcClient_makeRequest(methodName, args, cb) +{ + var req = {}; + req.client = this; + req.requestId = JSONRpcClient.requestId++; + + var obj = {}; + obj.id = req.requestId; + if (this.objectID) + obj.method = ".obj#" + this.objectID + "." + methodName; + else + obj.method = methodName; + obj.params = args; + + if (cb) req.cb = cb; + if (JSONRpcClient.profile_async) + req.profile = { "submit": new Date() }; + req.data = toJSON(obj); + + return req; +}; + +JSONRpcClient.prototype._sendRequest = +function JSONRpcClient_sendRequest(req) +{ + if(req.profile) req.profile.start = new Date(); + + /* Get free http object from the pool */ + var http = JSONRpcClient.poolGetHTTPRequest(); + JSONRpcClient.num_req_active++; + + /* Send the request */ + if (typeof(this.user) == "undefined") { + http.open("POST", this.serverURL, (req.cb != null)); + } else { + http.open("POST", this.serverURL, (req.cb != null), this.user, this.pass); + } + + /* setRequestHeader is missing in Opera 8 Beta */ + try { http.setRequestHeader("Content-type", "text/plain"); } catch(e) {} + + /* Construct call back if we have one */ + if(req.cb) { + var self = this; + http.onreadystatechange = function() { + if(http.readyState == 4) { + http.onreadystatechange = function () {}; + var res = { "cb": req.cb, "result": null, "ex": null}; + if (req.profile) { + res.profile = req.profile; + res.profile.end = new Date(); + } + try { res.result = self._handleResponse(http); } + catch(e) { res.ex = e; } + if(!JSONRpcClient.async_inflight[req.requestId].canceled) + JSONRpcClient.async_responses.push(res); + delete JSONRpcClient.async_inflight[req.requestId]; + JSONRpcClient.kick_async(); + } + }; + } else { + http.onreadystatechange = function() {}; + } + + JSONRpcClient.async_inflight[req.requestId] = req; + + try { + http.send(req.data); + } catch(e) { + JSONRpcClient.poolReturnHTTPRequest(http); + JSONRpcClient.num_req_active--; + throw new JSONRpcClient.Exception + (JSONRpcClient.Exception.CODE_ERR_CLIENT, "Connection failed"); + } + + if(!req.cb) return this._handleResponse(http); +}; + +JSONRpcClient.prototype._handleResponse = +function JSONRpcClient_handleResponse(http) +{ + /* Get the charset */ + if(!this.charset) { + this.charset = JSONRpcClient._getCharsetFromHeaders(http); + } + + /* Get request results */ + var status, statusText, data; + try { + status = http.status; + statusText = http.statusText; + data = http.responseText; + } catch(e) { + JSONRpcClient.poolReturnHTTPRequest(http); + JSONRpcClient.num_req_active--; + JSONRpcClient.kick_async(); + throw new JSONRpcClient.Exception + (JSONRpcClient.Exception.CODE_ERR_CLIENT, "Connection failed"); + } + + /* Return http object to the pool; */ + JSONRpcClient.poolReturnHTTPRequest(http); + JSONRpcClient.num_req_active--; + + /* Unmarshall the response */ + if(status != 200) { + throw new JSONRpcClient.Exception(status, statusText); + } + var obj; + try { + eval("obj = " + data); + } catch(e) { + throw new JSONRpcClient.Exception(550, "error parsing result"); + } + if(obj.error) + throw new JSONRpcClient.Exception(obj.error.code, obj.error.msg, + obj.error.trace); + var res = obj.result; + + /* Handle CallableProxy */ + if(res && res.objectID && res.JSONRPCType == "CallableReference") + return new JSONRpcClient(this.serverURL, this.user, + this.pass, res.objectID); + + return res; +}; + + +/* XMLHttpRequest wrapper code */ + +/* XMLHttpRequest pool globals */ +JSONRpcClient.http_spare = []; +JSONRpcClient.http_max_spare = 8; + +JSONRpcClient.poolGetHTTPRequest = +function JSONRpcClient_pool_getHTTPRequest() +{ + if(JSONRpcClient.http_spare.length > 0) { + return JSONRpcClient.http_spare.pop(); + } + return JSONRpcClient.getHTTPRequest(); +}; + +JSONRpcClient.poolReturnHTTPRequest = +function JSONRpcClient_poolReturnHTTPRequest(http) +{ + if(JSONRpcClient.http_spare.length >= JSONRpcClient.http_max_spare) + delete http; + else + JSONRpcClient.http_spare.push(http); +}; + +JSONRpcClient.msxmlNames = [ "MSXML2.XMLHTTP.5.0", + "MSXML2.XMLHTTP.4.0", + "MSXML2.XMLHTTP.3.0", + "MSXML2.XMLHTTP", + "Microsoft.XMLHTTP" ]; + +JSONRpcClient.getHTTPRequest = +function JSONRpcClient_getHTTPRequest() +{ + /* Mozilla XMLHttpRequest */ + try { + JSONRpcClient.httpObjectName = "XMLHttpRequest"; + return new XMLHttpRequest(); + } catch(e) {} + + /* Microsoft MSXML ActiveX */ + for (var i=0;i < JSONRpcClient.msxmlNames.length; i++) { + try { + JSONRpcClient.httpObjectName = JSONRpcClient.msxmlNames[i]; + return new ActiveXObject(JSONRpcClient.msxmlNames[i]); + } catch (e) {} + } + + /* None found */ + JSONRpcClient.httpObjectName = null; + throw new JSONRpcClient.Exception(0, "Can't create XMLHttpRequest object"); +}; + |