requestbase.java

OSGI这是一个中间件,与UPNP齐名,是用于移植到嵌入式平台之上

/*
 * Copyright (c) 2003, KNOPFLERFISH project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials
 *   provided with the distribution.
 *
 * - Neither the name of the KNOPFLERFISH project nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.knopflerfish.bundle.http;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Hashtable;

import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpUtils;

public class RequestBase extends HeaderBase {

    // protected constants

    protected static final String POST_METHOD = "POST";

    protected static final String HTTP_1_0_PROTOCOL = "HTTP/1.0";

    protected static final String HTTP_1_1_PROTOCOL = "HTTP/1.1";

    protected static final String FORM_MIME_TYPE = "application/x-www-form-urlencoded";

    // private fields

    private String method = null;

    private String uri = null;

    private String protocol = null;

    private String queryString = null;

    private Hashtable queryParameters = null;

    private Hashtable parameters = null;

    private ServletInputStreamImpl body = null;

    // constructors

    RequestBase() {
    }

    // public methods

    public void init(InputStream is) throws HttpException, IOException {

        ServletInputStreamImpl in = new ServletInputStreamImpl(
                new BufferedInputStream(is));

        parseRequestLine(in);
        super.init(in);

        body = in;
    }

    public void destroy() {

        method = null;
        uri = null;
        protocol = null;
        queryString = null;

        queryParameters = null;
        parameters = null;

        body = null;

        super.destroy();
    }

    public String getMethod() {
        return method;
    }

    public String getURI() {
        return uri;
    }

    public String getProtocol() {
        return protocol;
    }

    public String getQueryString() {
        return queryString;
    }

    public Hashtable getQueryParameters() {

        if (queryParameters == null)
            queryParameters = parseQueryString();

        return queryParameters;
    }

    public ServletInputStreamImpl getBody() {
        return body;
    }

    public Hashtable getParameters() {

        if (parameters == null)
            parameters = parseParameters();

        return parameters;
    }

    // private methods

    private void parseRequestLine(ServletInputStreamImpl in)
            throws HttpException, IOException {

        String line;
        int index;

        // parse method
        line = in.readLine();
        index = line.indexOf(' ');
        if (index == -1)
            throw new HttpException(HttpServletResponse.SC_BAD_REQUEST);
        method = line.substring(0, index);

        // parse uri
        line = line.substring(index + 1);
        index = line.indexOf(' ');
        if (index == -1)
            throw new HttpException(HttpServletResponse.SC_BAD_REQUEST);
        uri = line.substring(0, index);

        // parse protocol
        protocol = line.substring(index + 1).trim();

        // parse query string
        index = uri.indexOf('?');
        if (index != -1) {
            queryString = uri.substring(index + 1);
            uri = uri.substring(0, index);
        }
    }

    private Hashtable parseQueryString() {

        if (queryString != null) {
            try {
                return HttpUtils.parseQueryString(queryString);
            } catch (IllegalArgumentException ignore) {
            }
        }

        return new Hashtable();
    }

    private Hashtable parseParameters() {

        Hashtable parameters = getQueryParameters();

        if (POST_METHOD.equals(method)
                && FORM_MIME_TYPE.equals(getContentType())) {
            // Check that the input stream has not been touched
            try {
                Hashtable p = HttpUtils.parsePostData(getContentLength(),
                        getBody());
                Enumeration e = p.keys();
                while (e.hasMoreElements()) {
                    String key = (String) e.nextElement();
                    String[] val = (String[]) p.get(key);
                    String[] valArray;
                    String oldVals[] = (String[]) parameters.get(key);
                    if (oldVals == null) {
                        valArray = val;
                    } else {
                        valArray = new String[oldVals.length + val.length];
                        for (int i = 0; i < val.length; i++)
                            valArray[i] = val[i];
                        for (int i = 0; i < oldVals.length; i++)
                            valArray[val.length + i] = oldVals[i];
                    }
                    parameters.put(key, valArray);
                }
            } catch (IllegalArgumentException ignore) {
            }
        }

        return parameters;
    }

} // RequestBase