- Spring driven (configure in new web api methods)

- Support for authentication
- HTTP Basic authentication implementation

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@4645 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

config/alfresco/web-api-application-context.xml

@@ -0,0 +1,34 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE beans PUBLIC '-//SPRING//DTD BEAN//EN' 'http://www.springframework.org/dtd/spring-beans.dtd'>
+
+<beans>
+
+   <!--  -->   
+   <!--  Web API Authentication -->
+   <!--  -->   
+
+   <!--  TODO: For now, experiment with HTTP Basic Authentication -->
+   <alias alias="web.api.Authentication" name="web.api.BasicAuthentication" />
+   
+   <bean id="web.api.BasicAuthentication" class="org.alfresco.web.api.BasicAuthentication">
+      <property name="authenticationService" ref="AuthenticationService" />
+   </bean>
+
+
+   <!--  -->
+   <!--  Web API Services -->
+   <!--  -->
+
+   <bean id="web.api.TextSearchDescription" class="org.alfresco.web.api.services.TextSearchDescription">
+      <property name="httpUri" value="/search/textsearchdescription.xml" />
+      <property name="templateService" ref="TemplateService" />
+   </bean>
+
+   <bean id="web.api.TextSearch" class="org.alfresco.web.api.services.TextSearch">
+      <property name="httpUri" value="/search/text" />
+      <property name="serviceRegistry" ref="ServiceRegistry" />
+      <property name="searchService" ref="SearchService" />
+      <property name="templateService" ref="TemplateService"/>
+   </bean>
+   
+</beans>

source/java/org/alfresco/web/api/APIRequest.java

@@ -37,6 +37,16 @@ public class APIRequest extends HttpServletRequestWrapper
         // TODO: Complete list...
     }
 
+    /**
+     * Enumeration of "required" Authentication level
+     */
+    public enum RequiredAuthentication
+    {
+        None,
+        Guest,
+        User
+    }
+    
     
     /**
      * Construct

source/java/org/alfresco/web/api/APIService.java

@@ -18,8 +18,6 @@ package org.alfresco.web.api;
 
 import java.io.IOException;
 
-import javax.servlet.ServletContext;
-
 /**
  * API Service
  * 
@@ -29,12 +27,25 @@ public interface APIService
 {
 
     /**
-     * Initialise service
+     * Gets the required authentication level for execution of this service
      * 
-     * @param context
+     * @return  the required authentication level 
      */
-    public void init(ServletContext context);
+    public APIRequest.RequiredAuthentication getRequiredAuthentication();
 
+    /**
+     * Gets the HTTP method this service is bound to
+     * 
+     * @return  HTTP method
+     */
+    public APIRequest.HttpMethod getHttpMethod();
+
+    /**
+     * Gets the HTTP uri this service is bound to
+     * 
+     * @return  HTTP uri
+     */
+    public String getHttpUri();
     
     /**
      * Execute service

source/java/org/alfresco/web/api/APIServiceMap.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2005 Alfresco, Inc.
+ *
+ * Licensed under the Mozilla Public License version 1.1 
+ * with a permitted attribution clause. You may obtain a
+ * copy of the License at
+ *
+ *   http://www.alfresco.org/legal/license.txt
+ *
+ * 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.alfresco.web.api;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+import org.aopalliance.intercept.MethodInterceptor;
+import org.springframework.aop.framework.ProxyFactory;
+import org.springframework.context.ApplicationContext;
+
+
+/**
+ * Registry of Web API Services methods
+ * 
+ * @author davidc
+ */
+public class APIServiceMap
+{
+    // TODO: Support different kinds of uri resolution (e.g. regex:/search/.*)
+    
+    private List<APIRequest.HttpMethod> methods = new ArrayList<APIRequest.HttpMethod>();
+    private List<String> uris = new ArrayList<String>();
+    private List<APIService> services = new ArrayList<APIService>();
+    
+    
+    /**
+     * Construct list of API Services
+     * 
+     * @param context
+     */
+    public APIServiceMap(ApplicationContext context)
+    {
+        // locate authentication interceptor
+        MethodInterceptor authInterceptor = (MethodInterceptor)context.getBean("web.api.Authentication");
+        
+        // register all API Services
+        // NOTE: An API Service is one registered in Spring which supports the APIService interface
+        Map<String, APIService> apiServices = context.getBeansOfType(APIService.class, false, false);
+        for (Map.Entry<String, APIService> apiService : apiServices.entrySet())
+        {
+            APIService service = apiService.getValue();
+            APIRequest.HttpMethod method = service.getHttpMethod();
+            String httpUri = service.getHttpUri();
+            if (httpUri == null || httpUri.length() == 0)
+            {
+                throw new APIException("Web API Service " + apiService.getKey() + " does not specify a HTTP URI mapping");
+            }
+            
+            if (authInterceptor != null && service.getRequiredAuthentication() != APIRequest.RequiredAuthentication.None)
+            {
+                // wrap API Service in appropriate interceptors (e.g. authentication)
+                ProxyFactory authFactory = new ProxyFactory(service);
+                authFactory.addAdvice(authInterceptor);
+                service = (APIService)authFactory.getProxy();
+            }
+            
+            methods.add(method);
+            uris.add(httpUri);
+            services.add(service);
+        }
+    }
+    
+    
+    /**
+     * Gets an API Service given an HTTP Method and URI
+     * 
+     * @param method
+     * @param uri
+     * @return
+     */
+    public APIService get(APIRequest.HttpMethod method, String uri)
+    {
+        APIService apiService = null;
+
+        // TODO: Replace with more efficient approach
+        for (int i = 0; i < services.size(); i++)
+        {
+            if (methods.get(i).equals(method) && uris.get(i).equals(uri))
+            {
+                apiService = services.get(i);
+                break;
+            }
+        }
+        
+        return apiService;
+    }
+    
+}

source/java/org/alfresco/web/api/APIServlet.java

@@ -17,13 +17,14 @@
 package org.alfresco.web.api;
 
 import java.io.IOException;
-import java.util.regex.Pattern;
 
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 import org.alfresco.web.app.servlet.BaseServlet;
+import org.springframework.context.ApplicationContext;
+import org.springframework.web.context.support.WebApplicationContextUtils;
 
 
 /**
@@ -35,14 +36,8 @@ public class APIServlet extends BaseServlet
 {
     private static final long serialVersionUID = 4209892938069597860L;
     
-    
     // API Services
-    // TODO: Define via configuration
-    // TODO: Provide mechanism to construct service specific urls (ideally from template)
-    private static Pattern TEXT_SEARCH_DESCRIPTION_URI = Pattern.compile("/search/textsearchdescription.xml");
-    private static Pattern SEARCH_URI = Pattern.compile("/search/text");
-    private static APIService TEXT_SEARCH_DESCRIPTION_SERVICE;
-    private static APIService TEXT_SEARCH_SERVICE;
+    private APIServiceMap apiServiceMap;
     
     
     @Override
@@ -50,16 +45,14 @@ public class APIServlet extends BaseServlet
     {
         super.init();
 
-        // TODO: Replace with dispatch mechanism (maybe lazy construct)
-        TEXT_SEARCH_DESCRIPTION_SERVICE = new TextSearchDescriptionService();
-        TEXT_SEARCH_DESCRIPTION_SERVICE.init(getServletContext());
-        TEXT_SEARCH_SERVICE = new TextSearchService();
-        TEXT_SEARCH_SERVICE.init(getServletContext());
+        // Retrieve all web api services and index by http url & http method
+        ApplicationContext context = WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext());
+        apiServiceMap = new APIServiceMap(context);
     }
 
 
 // TODO:
-// - authentication
+// - authentication (as suggested in http://www.xml.com/pub/a/2003/12/17/dive.html)
 // - atom
 //   - generator
 //   - author (authenticated)
@@ -79,31 +72,24 @@ public class APIServlet extends BaseServlet
         APIRequest request = new APIRequest(req);
         APIResponse response = new APIResponse(res);
         
-        // TODO: Handle authentication - HTTP Auth?
-        
-
         //
         // Execute appropriate service
         //
-        // TODO: Replace with configurable dispatch mechanism based on HTTP method & uri.
         // TODO: Handle errors (with appropriate HTTP error responses) 
 
         APIRequest.HttpMethod method = request.getHttpMethod();
         String uri = request.getPathInfo();
 
-        if (method == APIRequest.HttpMethod.GET && TEXT_SEARCH_DESCRIPTION_URI.matcher(uri).matches())
+        APIService service = apiServiceMap.get(method, uri);
+        if (service != null)
         {
-            TEXT_SEARCH_DESCRIPTION_SERVICE.execute(request, response);
-        }
-        else if (method == APIRequest.HttpMethod.GET && SEARCH_URI.matcher(uri).matches())
-        {
-            TEXT_SEARCH_SERVICE.execute(request, response);
+            service.execute(request, response);
         }
         else
         {
             response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+            // TODO: add appropriate error detail 
         }
-        
     }
 
 }

source/java/org/alfresco/web/api/BasicAuthentication.java

@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2005 Alfresco, Inc.
+ *
+ * Licensed under the Mozilla Public License version 1.1 
+ * with a permitted attribution clause. You may obtain a
+ * copy of the License at
+ *
+ *   http://www.alfresco.org/legal/license.txt
+ *
+ * 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.alfresco.web.api;
+
+import org.alfresco.repo.security.authentication.AuthenticationException;
+import org.alfresco.repo.security.authentication.AuthenticationUtil;
+import org.alfresco.service.cmr.security.AuthenticationService;
+import org.alfresco.util.Base64;
+import org.aopalliance.intercept.MethodInterceptor;
+import org.aopalliance.intercept.MethodInvocation;
+
+
+/**
+ * HTTP Basic Authentication Interceptor
+ * 
+ * @author davidc
+ */
+public class BasicAuthentication implements MethodInterceptor
+{
+    // dependencies
+    private AuthenticationService authenticationService;
+    
+    /**
+     * @param authenticationService
+     */
+    public void setAuthenticationService(AuthenticationService authenticationService)
+    {
+        this.authenticationService = authenticationService;
+    }
+    
+    /* (non-Javadoc)
+     * @see org.aopalliance.intercept.MethodInterceptor#invoke(org.aopalliance.intercept.MethodInvocation)
+     */
+    public Object invoke(MethodInvocation invocation)
+        throws Throwable
+    {
+        boolean authorized = false;
+        Object retVal = null;
+        Object[] args = invocation.getArguments();
+        APIRequest request = (APIRequest)args[0];
+        APIService service = (APIService)invocation.getThis();
+
+        try
+        {
+            //
+            // validate credentials
+            // 
+
+            String authorization = request.getHeader("Authorization");
+            if ((authorization == null || authorization.length() == 0) && service.getRequiredAuthentication().equals(APIRequest.RequiredAuthentication.Guest))
+            {
+                // authenticate as guest, if service allows
+                authenticationService.authenticateAsGuest();
+                authorized = true;
+            }
+            else if (authorization != null && authorization.length() > 0)
+            {
+                try
+                {
+                    String[] authorizationParts = authorization.split(" ");
+                    if (!authorizationParts[0].equalsIgnoreCase("basic"))
+                    {
+                        throw new APIException("Authorization '" + authorizationParts[0] + "' not supported.");
+                    }
+                    String decodedAuthorisation = new String(Base64.decode(authorizationParts[1]));
+                    String[] parts = decodedAuthorisation.split(":");
+                    
+                    if (parts.length == 1)
+                    {
+                        // assume a ticket has been passed
+                        authenticationService.validate(parts[0]);
+                        authorized = true;
+                    }
+                    else
+                    {
+                        // assume username and password passed
+                        if (parts[0].equals(AuthenticationUtil.getGuestUserName()))
+                        {
+                            authenticationService.authenticateAsGuest();
+                            authorized = true;
+                        }
+                        else
+                        {
+                            authenticationService.authenticate(parts[0], parts[1].toCharArray());
+                            authorized = true;
+                        }
+                    }
+                }
+                catch(AuthenticationException e)
+                {
+                    // failed authentication
+                }
+            }
+
+            //
+            // execute API service or request authorization
+            //
+            
+            if (authorized)
+            {
+                retVal = invocation.proceed();
+            }
+            else
+            {
+                APIResponse response = (APIResponse)args[1];
+                response.setStatus(401);
+                response.setHeader("WWW-Authenticate", "Basic realm=\"Alfresco\"");
+            }
+        }
+        finally
+        {
+            // clear authentication
+            // TODO: Consider case where authentication is set before this method is called.
+            //       That shouldn't be the case for the web api.
+            if (authorized)
+            {
+                authenticationService.clearCurrentSecurityContext();
+            }
+        }
+
+        return retVal;
+    }
+
+}

source/java/org/alfresco/web/api/services/TextSearch.java

@@ -14,7 +14,7 @@
  * language governing permissions and limitations under the
  * License.
  */
-package org.alfresco.web.api;
+package org.alfresco.web.api.services;
 
 import java.io.IOException;
 import java.io.PrintWriter;
@@ -22,8 +22,6 @@ import java.io.StringWriter;
 import java.util.HashMap;
 import java.util.Map;
 
-import javax.servlet.ServletContext;
-
 import org.alfresco.service.ServiceRegistry;
 import org.alfresco.service.cmr.repository.StoreRef;
 import org.alfresco.service.cmr.repository.TemplateNode;
@@ -32,8 +30,13 @@ import org.alfresco.service.cmr.search.ResultSet;
 import org.alfresco.service.cmr.search.SearchService;
 import org.alfresco.util.ApplicationContextHelper;
 import org.alfresco.util.GUID;
+import org.alfresco.web.api.APIException;
+import org.alfresco.web.api.APIRequest;
+import org.alfresco.web.api.APIResponse;
+import org.alfresco.web.api.APIService;
+import org.alfresco.web.api.APIRequest.HttpMethod;
+import org.alfresco.web.api.APIRequest.RequiredAuthentication;
 import org.springframework.context.ApplicationContext;
-import org.springframework.web.context.support.WebApplicationContextUtils;
 
 
 /**
@@ -41,7 +44,7 @@ import org.springframework.web.context.support.WebApplicationContextUtils;
  * 
  * @author davidc
  */
-public class TextSearchService implements APIService
+public class TextSearch implements APIService
 {
     // NOTE: startPage and startIndex are 1 offset.
 
@@ -51,31 +54,68 @@ public class TextSearchService implements APIService
     private static final int itemsPerPage = 10;
 
     // dependencies
+    private String uri;
     private ServiceRegistry serviceRegistry;
     private SearchService searchService;
     private TemplateService templateService;
 
     
-    
-    /* (non-Javadoc)
-     * @see org.alfresco.web.api.APIService#init(javax.servlet.ServletContext)
+    /**
+     * Sets the Http URI
+     * 
+     * @param uri
      */
-    public void init(ServletContext context)
+    public void setHttpUri(String uri)
     {
-        ApplicationContext appContext = WebApplicationContextUtils.getWebApplicationContext(context);
-        init(appContext);
+        this.uri = uri;
     }
 
     /**
-     * Internal initialisation
-     * 
-     * @param context
+     * @param serviceRegistry 
      */
-    private void init(ApplicationContext context)
+    public void setServiceRegistry(ServiceRegistry serviceRegistry)
     {
-        serviceRegistry = (ServiceRegistry)context.getBean(ServiceRegistry.SERVICE_REGISTRY);
-        searchService = (SearchService)context.getBean(ServiceRegistry.SEARCH_SERVICE.getLocalName());
-        templateService = (TemplateService)context.getBean(ServiceRegistry.TEMPLATE_SERVICE.getLocalName());
+        this.serviceRegistry = serviceRegistry;
+    }
+
+    /**
+     * @param searchService
+     */
+    public void setSearchService(SearchService searchService)
+    {
+        this.searchService = searchService;
+    }
+
+    /**
+     * @param templateService
+     */
+    public void setTemplateService(TemplateService templateService)
+    {
+        this.templateService = templateService;
+    }
+
+    /* (non-Javadoc)
+     * @see org.alfresco.web.api.APIService#getRequiredAuthentication()
+     */
+    public RequiredAuthentication getRequiredAuthentication()
+    {
+        return APIRequest.RequiredAuthentication.User;
+    }
+
+    /* (non-Javadoc)
+     * @see org.alfresco.web.api.APIService#getHttpMethod()
+     */
+    public HttpMethod getHttpMethod()
+    {
+        return APIRequest.HttpMethod.GET;
+    }
+
+    /* (non-Javadoc)
+     * @see org.alfresco.web.api.APIService#getHttpUri()
+     */
+    public String getHttpUri()
+    {
+        return this.uri;
     }
     
     /* (non-Javadoc)
@@ -409,8 +449,11 @@ public class TextSearchService implements APIService
         throws Exception
     {
         ApplicationContext context = ApplicationContextHelper.getApplicationContext();
-        TextSearchService method = new TextSearchService();
-        method.init(context);
+        TextSearch method = new TextSearch();
+        method.setServiceRegistry((ServiceRegistry)context.getBean(ServiceRegistry.SERVICE_REGISTRY));
+        method.setTemplateService((TemplateService)context.getBean(ServiceRegistry.TEMPLATE_SERVICE.getLocalName()));
+        method.setSearchService((SearchService)context.getBean(ServiceRegistry.SEARCH_SERVICE.getLocalName()));
+        method.setHttpUri("/search/text");
         method.test();
     }
 

source/java/org/alfresco/web/api/services/TextSearchDescription.java

@@ -14,18 +14,18 @@
  * language governing permissions and limitations under the
  * License.
  */
-package org.alfresco.web.api;
+package org.alfresco.web.api.services;
 
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
 
-import javax.servlet.ServletContext;
-
-import org.alfresco.service.ServiceRegistry;
 import org.alfresco.service.cmr.repository.TemplateService;
-import org.springframework.context.ApplicationContext;
-import org.springframework.web.context.support.WebApplicationContextUtils;
+import org.alfresco.web.api.APIRequest;
+import org.alfresco.web.api.APIResponse;
+import org.alfresco.web.api.APIService;
+import org.alfresco.web.api.APIRequest.HttpMethod;
+import org.alfresco.web.api.APIRequest.RequiredAuthentication;
 
 
 /**
@@ -33,18 +33,53 @@ import org.springframework.web.context.support.WebApplicationContextUtils;
  *
  * @author davidc
  */
-public class TextSearchDescriptionService implements APIService
+public class TextSearchDescription implements APIService
 {
     // dependencies
+    private String uri;
     private TemplateService templateService;
     
-    /* (non-Javadoc)
-     * @see org.alfresco.web.api.APIService#init(javax.servlet.ServletContext)
+    /**
+     * Sets the Http URI
+     * 
+     * @param uri
      */
-    public void init(ServletContext context)
+    public void setHttpUri(String uri)
     {
-        ApplicationContext appContext = WebApplicationContextUtils.getWebApplicationContext(context);
-        templateService = (TemplateService)appContext.getBean(ServiceRegistry.TEMPLATE_SERVICE.getLocalName());
+        this.uri = uri;
+    }
+
+    /**
+     * @param templateService
+     */
+    public void setTemplateService(TemplateService templateService)
+    {
+        this.templateService = templateService;
+    }
+     
+    
+    /* (non-Javadoc)
+     * @see org.alfresco.web.api.APIService#getRequiredAuthentication()
+     */
+    public RequiredAuthentication getRequiredAuthentication()
+    {
+        return APIRequest.RequiredAuthentication.None;
+    }
+
+    /* (non-Javadoc)
+     * @see org.alfresco.web.api.APIService#getHttpMethod()
+     */
+    public HttpMethod getHttpMethod()
+    {
+        return APIRequest.HttpMethod.GET;
+    }
+
+    /* (non-Javadoc)
+     * @see org.alfresco.web.api.APIService#getHttpUri()
+     */
+    public String getHttpUri()
+    {
+        return this.uri;
     }
     
     /* (non-Javadoc)

source/web/WEB-INF/web.xml

@@ -59,6 +59,7 @@
       <param-value>
          classpath:alfresco/web-client-application-context.xml
          classpath:web-services-application-context.xml
+         classpath:alfresco/web-api-application-context.xml
          classpath:alfresco/application-context.xml 
       </param-value>
       <description>Spring config file locations</description>