1 files changed, 148 insertions, 0 deletions
diff --git a/simple/simple-http/src/main/java/org/simpleframework/http/core/QueryBuilder.java b/simple/simple-http/src/main/java/org/simpleframework/http/core/QueryBuilder.java
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+++ b/simple/simple-http/src/main/java/org/simpleframework/http/core/QueryBuilder.java
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+/*
+ * QueryBuilder.java October 2002
+ *
+ * Copyright (C) 2002, Niall Gallagher <niallg@users.sf.net>
+ *
+ * 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.simpleframework.http.core;
+
+import static org.simpleframework.http.Protocol.APPLICATION;
+import static org.simpleframework.http.Protocol.URL_ENCODED;
+
+import org.simpleframework.http.ContentType;
+import org.simpleframework.http.Query;
+import org.simpleframework.http.Request;
+import org.simpleframework.http.message.Entity;
+import org.simpleframework.http.message.Header;
+
+/**
+ * The <code>QueryBuilder</code> object is used to create the query. 
+ * It is created using the request URI query and a form post body if
+ * sent. The application/x-www-form-urlencoded conent type identifies
+ * the body as contain form data. If there are duplicates then they
+ * both are available from the query that is built.
+ * 
+ * @author Niall Gallagher
+ */
+class QueryBuilder {
+   
+   /**
+    * This is the request that is used to acquire the data.
+    */
+   private final Request request;
+   
+   /**
+    * This is the header that is used to acquire the data.
+    */
+   private final Header header;
+
+   /**
+    * Constructor for the <code>QueryBuilder</code> object. This will
+    * create an object that can be used to construct a single query
+    * from the multiple sources of data within the request entity.
+    * 
+    * @param request this is the request to build a query for
+    * @param entity this is the entity that contains the data
+    */
+   public QueryBuilder(Request request, Entity entity) {
+      this.header = entity.getHeader();
+      this.request = request;     
+   } 
+   
+   /**
+    * This method is used to acquire the query part from the HTTP 
+    * request URI target and a form post if it exists. Both the 
+    * query and the form post are merge together in a single query.
+    * 
+    * @return the query associated with the HTTP target URI
+    */   
+   public Query build() {;
+      Query query = header.getQuery();
+      
+      if(!isFormPost()) {
+         return query;
+      }
+      return getQuery(query);
+   }
+   
+   /**
+    * This method is used to acquire the query part from the HTTP 
+    * request URI target and a form post if it exists. Both the 
+    * query and the form post are merge together in a single query.
+    * 
+    * @param query this is the URI query string to be used
+    * 
+    * @return the query associated with the HTTP target URI
+    */   
+   private Query getQuery(Query query) {
+      String body = getContent(); 
+      
+      if(body == null) {
+         return query;
+      }
+      return new QueryCombiner(query, body);
+   }
+   
+   /**
+    * This method attempts to acquire the content of the  request
+    * body. If there is an <code>IOException</code> acquiring the
+    * content of the body then this will simply return a null
+    * value without reporting the exception.
+    * 
+    * @return the content of the body, or null on error
+    */
+   private String getContent() {
+      try {
+         return request.getContent();
+      } catch(Exception e) {
+         return null;
+      }
+   }
+   
+   /**
+    * This is used to determine if the content type is a form POST
+    * of type application/x-www-form-urlencoded. Such a type is
+    * used when a HTML form is used to post data to the server.
+    * 
+    * @return this returns true if content type is a form post
+    */   
+   private boolean isFormPost() {
+      ContentType type = request.getContentType();
+      
+      if(type == null) {
+         return false;
+      }
+      return isFormPost(type);
+   }
+   
+   /**
+    * This is used to determine if the content type is a form POST
+    * of type application/x-www-form-urlencoded. Such a type is
+    * used when a HTML form is used to post data to the server.  
+    * 
+    * @param type the type to determine if its a form post
+    * 
+    * @return this returns true if content type is a form post
+    */
+   private boolean isFormPost(ContentType type) {   
+      String primary = type.getPrimary();
+      String secondary = type.getSecondary();
+      
+      if(!primary.equals(APPLICATION)) {
+         return false;
+      }
+      return secondary.equals(URL_ENCODED);
+   }
+}