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PHPJavaBridge server (soluble fork)
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/*-*- mode: Java; tab-width:8 -*-*/

package io.soluble.pjb.bridge.http;

/*
 * Copyright (C) 2003-2007 Jost Boekemeier
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;

import io.soluble.pjb.bridge.NotImplementedException;
import io.soluble.pjb.bridge.Util;

/**
 * A FastCGI OutputStream
 *
 * @author jostb
 */
public class FCGIOutputStream extends FCGIConnectionOutputStream {
    public void write(int type, byte buf[]) throws FCGIConnectionException {
        write(type, buf, buf.length);
    }

    /**
     * Write a FCGI packet
     *
     * @param type   the packet type
     * @param buf    the output buffer
     * @param length the packet length
     * @throws FCGIConnectionException
     */
    public void write(int type, byte buf[], int length) throws FCGIConnectionException {
        int requestId = 1;
        byte[] header = new byte[]{
                1, (byte) type,
                (byte) ((requestId >> 8) & 0xff), (byte) ((requestId) & 0xff),
                (byte) ((FCGIUtil.FCGI_BUF_SIZE >> 8) & 0xff), (byte) ((FCGIUtil.FCGI_BUF_SIZE) & 0xff),
                0, //padding
                0};
        int contentLength = length;
        int pos = 0;
        while (pos + FCGIUtil.FCGI_BUF_SIZE <= contentLength) {
            write(header);
            write(buf, pos, FCGIUtil.FCGI_BUF_SIZE);
            pos += FCGIUtil.FCGI_BUF_SIZE;
        }
        contentLength = length % FCGIUtil.FCGI_BUF_SIZE;
        header[4] = (byte) ((contentLength >> 8) & 0xff);
        header[5] = (byte) ((contentLength) & 0xff);
        write(header);
        write(buf, pos, contentLength);
    }

    /**
     * Start the FCGI_RESPONDER conversation
     *
     * @throws FCGIConnectionException
     */
    public void writeBegin() throws FCGIConnectionException {
        int role = FCGIUtil.FCGI_RESPONDER;
        byte[] body = new byte[]{
                (byte) ((role >> 8) & 0xff), (byte) ((role) & 0xff),
                FCGIUtil.FCGI_KEEP_CONN,
                0, 0, 0, 0, 0};

        write(FCGIUtil.FCGI_BEGIN_REQUEST, body);
    }

    private void writeLength(ByteArrayOutputStream out, int keyLen) throws IOException {
        if (keyLen < 0x80) {
            out.write((byte) keyLen);
        } else {
            byte[] b = new byte[]{
                    (byte) (((keyLen >> 24) | 0x80) & 0xff),
                    (byte) ((keyLen >> 16) & 0xff),
                    (byte) ((keyLen >> 8) & 0xff),
                    (byte) keyLen};
            out.write(b);
        }
    }

    /**
     * Write FCGI Params according to FCGI spec
     *
     * @param props
     * @throws FCGIConnectionException
     */
    public void writeParams(Map props) throws FCGIConnectionException {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        for (Iterator ii = props.keySet().iterator(); ii.hasNext(); ) {
            Object k = ii.next();
            Object v = props.get(k);
            String key = String.valueOf(k);
            String val = String.valueOf(v);
            int keyLen = key.length();
            int valLen = val.length();
            if (keyLen == 0 || valLen == 0) continue;
            try {
                writeLength(out, keyLen);
                writeLength(out, valLen);
                out.write(key.getBytes(Util.ASCII));
                out.write(val.getBytes(Util.ASCII));
            } catch (IOException e) {
                throw new FCGIConnectionException(connection, e);
            }
        }
        write(FCGIUtil.FCGI_PARAMS, out.toByteArray());
        write(FCGIUtil.FCGI_PARAMS, FCGIUtil.FCGI_EMPTY_RECORD);
    }

    /* (non-Javadoc)
     * @see java.io.OutputStream#write(int)
     */
    public void write(int b) {
        throw new NotImplementedException();
    }

}