HttpServletRequest which should be parsed
- */
- protected final void parseParameters(final HttpServletRequest req)
- {
- queryParamOrder = new Vector();
- queryParameters = new Hashtable();
- bodyParamOrder = new Vector();
- bodyParameters = new Hashtable();
-
- //Insert code for Query string parsing
- String rawQuery = req.getQueryString();
- queryParameters = tokenize(queryParameters, queryParamOrder, rawQuery, DEFAULT_CHARACTER_ENCODING);
-
- //analyze HTTP Post body parameters
- if (req.getMethod().equalsIgnoreCase("POST"))
- {
- //get body encoding
- String enc = req.getCharacterEncoding();
- if (enc == null) enc = DEFAULT_CHARACTER_ENCODING;
-
- if (req.getContentType().equals("application/x-www-form-urlencoded"))
- {
- try
- {
- bodyParameters = parsePostData(bodyParameters, req.getContentLength(), req.getInputStream(), enc);
- }
- catch (IOException e)
- {
- context.log("could not open input stream of reqest \n" + e.toString());
- }
- }
- else
- {
- //TODO add multipart code
- context.log(
- "ERROR other Content-Types than 'application/x-www-form-urlencoded' not supported!");
- }
-
- }// end POST
- }
-
- /**
- * parses the HTTP POST parameters
- *
- * @param ht parameter Hashtable to put parameters in.
- * @param length of content
- * @param instream the ServletInputStream of the request
- * @param encoding encoding of the instream
- *
- * @return the Hashtable with the parsed data
- */
- private Hashtable parsePostData(Hashtable ht, final int length, final ServletInputStream instream,
- final String encoding)
- {
- int inputLen, offset;
- byte[] postedBytes = null;
- boolean dataRemaining = true;
- String postedBody;
-
- StringBuffer sb = new StringBuffer();
-
- if (length <= 0)
- {
- return null;
- }
-
- postedBytes = new byte[length];
- try
- {
- offset = 0;
- while (dataRemaining)
- {
- inputLen = instream.read(postedBytes, offset, length - offset);
- if (inputLen <= 0)
- {
- throw new IOException("read error during reading the HTTP POST body");
- }
- offset += inputLen;
- if ((length - offset) == 0)
- {
- dataRemaining = false;
- }
- }
- }
- catch (IOException e)
- {
- System.out.println("Exception =" + e);
- return null;
- }
-
- postedBody = new String(postedBytes);
- Hashtable ht2 = tokenize(ht, bodyParamOrder, postedBody, encoding);
- return ht2;
- }
-
-
- /**
- * tokenizes parameter strings
- *
- * @param ht parameter Hashtable to put parameters in.
- * @param order Vector in which the order of the tokenized parameters will be stored.
- * @param parameterString String to tokenize.
- * @param encoding which will be used to decode the parameterString.
- *
- * @return the Hashtable with the parsed data
- */
- private Hashtable tokenize(Hashtable ht, Vector order, final String parameterString, final String encoding)
- {
- String[] valArray = null;
-
- if (null == parameterString) return ht;
-
- StringTokenizer st = new StringTokenizer(parameterString, "&");
-
- String key = null;
- String val = null;
-
- while (st.hasMoreTokens())
- {
- String pair = (String) st.nextToken();
- int pos = pair.indexOf('=');
- if (pos == -1)
- {
- throw new IllegalArgumentException();
- }
- try
- {
- key = URLDecoder.decode(pair.substring(0, pos), encoding);
- val = URLDecoder.decode(pair.substring(pos + 1, pair.length()), encoding);
- }
- catch (Exception e)
- {
- throw new IllegalArgumentException();
- }
- if (ht.containsKey(key))
- {
- String oldVals[] = (String[]) ht.get(key);
- valArray = new String[oldVals.length + 1];
- for (int i = 0; i < oldVals.length; i++)
- {
- valArray[i] = oldVals[i];
- }
- valArray[oldVals.length] = val;
- }
- else
- {
- valArray = new String[1];
- valArray[0] = val;
- }
- ht.put(key, valArray);
- order.addElement(key);
- }
- return ht;
-
- }
-
- /**
- * Returns the value of a request parameter as a String, or null if the
- * parameter does not exist. Request parameters are extra information sent with the request. For HTTP
- * servlets, parameters are contained in the query string or posted form data.
- *
- * - * You should only use this method when you are sure the parameter has only one value. If the parameter - * might have more than one value, use {@link #getParameterValues}. - * - *
- * If you use this method with a multivalued parameter, the value returned is equal to the first value in
- * the array returned by getParameterValues.
- *
- *
- * If the parameter data was sent in the request body, such as occurs with an HTTP POST request, then
- * reading the body directly via {@link#getInputStream} or {@link #getReader}can interfere with the
- * execution of this method.
- *
- * @param name a String containing the name of the parameter whose value is requested
- *
- * @return a String representing the single value of the parameter
- *
- * @see #getParameterValues
- *
- */
- public final String getParameter(final String name) {
- String val = getParameter(name, QUERY_PARAM);
- return (null != val) ? val : getParameter(name, BODY_PARAM);
- }
-
- /**
- * Returns the value of a request parameter as a String, or null if the
- * parameter does not exist.
- *
- * @param name a String containing the name of the parameter whose value is requested
- * @param parameterType type of parameter
- * @see at.gv.egovernment.moa.id.util.ParametersInOrderServlet#QUERY_PARAM
- * and @see at.gv.egovernment.moa.id.util.ParametersInOrderServlet#BODY_PARAM
- * @see getParameterValues(String name);
- * @return value of the (single) parameter or null if not availlable
- **/
- public final String getParameter(final String name, final int parameterType)
- {
-
- Hashtable parameters = (parameterType == QUERY_PARAM) ? queryParameters : bodyParameters;
- String[] vals = (String[]) parameters.get(name);
- if (vals == null)
- {
- return null;
- }
- return vals[0];
- }
-
-
- /**
- * Returns an array of String objects containing all of the values the given request
- * parameter has, or null if the parameter does not exist.
- *
- *
- * If the parameter has a single value, the array has a length of 1.
- *
- * @param name a String containing the name of the parameter whose value is requested
- * @param parameterType type of parameter
- * @see at.gv.egovernment.moa.id.util.ParametersInOrderServlet#QUERY_PARAM
- * and @see at.gv.egovernment.moa.id.util.ParametersInOrderServlet#BODY_PARAM
- * @return an array of String objects containing the parameter's values or null
- *
- * @see #getParameter
- */
- public final String getParameterValues(final String name, final int parameterType)
- {
- Hashtable parameters = (parameterType == QUERY_PARAM) ? queryParameters : bodyParameters;
- String[] vals = (String[]) parameters.get(name);
- if (vals == null)
- {
- return null;
- }
- String vallist = vals[0];
- for (int i = 1; i < vals.length; i++)
- {
- vallist = vallist + "," + vals[i];
- }
- return vallist;
- }
-
- /**
- *
- * Returns an Enumeration of String objects containing the names of the
- * parameters contained in this request. If the request has no parameters, the method returns an empty
- * Enumeration.
- * @param parameterType type of parameter
- * @see at.gv.egovernment.moa.id.util.ParametersInOrderServlet#QUERY_PARAM
- * and @see at.gv.egovernment.moa.id.util.ParametersInOrderServlet#BODY_PARAM
- *
- * @return an Enumeration of String objects, each String
- * containing the name of a request parameter; or an empty Enumeration if the
- * request has no parameters
- *
- */
- public final Enumeration getParameterNames(final int parameterType)
- {
- if (QUERY_PARAM == parameterType)
- return queryParamOrder.elements();
- else
- return bodyParamOrder.elements();
- }
-} //End InOrderServletRequestWrapper
\ No newline at end of file
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