/*

 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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package com.sun.xml.internal.ws.transport.http.server;

import com.sun.istack.internal.NotNull;

import com.sun.net.httpserver.Headers;

import com.sun.net.httpserver.HttpExchange;

import com.sun.net.httpserver.HttpsExchange;

import com.sun.xml.internal.ws.api.message.Packet;

import com.sun.xml.internal.ws.api.server.WSEndpoint;

import com.sun.xml.internal.ws.api.server.WebServiceContextDelegate;

import com.sun.xml.internal.ws.api.server.PortAddressResolver;

import com.sun.xml.internal.ws.transport.http.HttpAdapter;

import com.sun.xml.internal.ws.transport.http.WSHTTPConnection;

import com.sun.xml.internal.ws.developer.JAXWSProperties;

import com.sun.xml.internal.ws.resources.WsservletMessages;

import com.sun.xml.internal.ws.util.ReadAllStream;

import javax.xml.ws.handler.MessageContext;

import javax.xml.ws.WebServiceException;

import java.io.FilterInputStream;

import java.io.FilterOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.URI;

import java.security.Principal;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

import java.util.Set;

/**

 * {@link WSHTTPConnection} used with Java SE endpoints. It provides connection

 * implementation using {@link HttpExchange} object.

 *

 * @author Jitendra Kotamraju

 */

final class ServerConnectionImpl extends WSHTTPConnection implements WebServiceContextDelegate {

    private final HttpExchange httpExchange;

    private int status;

    private final HttpAdapter adapter;

    private LWHSInputStream in;

    private OutputStream out;

    public ServerConnectionImpl(@NotNull HttpAdapter adapter, @NotNull HttpExchange httpExchange) {

        this.adapter = adapter;

        this.httpExchange = httpExchange;

    }

    @Override

    @Property(value = {MessageContext.HTTP_REQUEST_HEADERS, Packet.INBOUND_TRANSPORT_HEADERS})

    public @NotNull Map<String,List<String>> getRequestHeaders() {

        return httpExchange.getRequestHeaders();

    }

    @Override

    public String getRequestHeader(String headerName) {

        return httpExchange.getRequestHeaders().getFirst(headerName);

    }

    @Override

    public void setResponseHeaders(Map<String,List<String>> headers) {

        Headers r = httpExchange.getResponseHeaders();

        r.clear();

        for(Map.Entry <String, List<String>> entry : headers.entrySet()) {

            String name = entry.getKey();

            List<String> values = entry.getValue();

            // ignore headers that interfere with our correct operations

            if (!"Content-Length".equalsIgnoreCase(name) && !"Content-Type".equalsIgnoreCase(name)) {

                r.put(name,new ArrayList<String>(values));

            }

        }

    }

    @Override

        public void setResponseHeader(String key, List<String> value) {

                httpExchange.getResponseHeaders().put(key, value);

        }

        @Override

        public Set<String> getRequestHeaderNames() {

        return httpExchange.getRequestHeaders().keySet();

        }

        @Override

        public List<String> getRequestHeaderValues(String headerName) {

                return httpExchange.getRequestHeaders().get(headerName);

        }

    @Override

    @Property({MessageContext.HTTP_RESPONSE_HEADERS,Packet.OUTBOUND_TRANSPORT_HEADERS})

    public Map<String,List<String>> getResponseHeaders() {

        return httpExchange.getResponseHeaders();

    }

    @Override

    public void setContentTypeResponseHeader(@NotNull String value) {

        httpExchange.getResponseHeaders().set("Content-Type",value);

    }

    @Override

    public void setStatus(int status) {

        this.status = status;

    }

    @Override

    @Property(MessageContext.HTTP_RESPONSE_CODE)

    public int getStatus() {

        return status;

    }

    public @NotNull InputStream getInput() {

        if (in == null) {

            in = new LWHSInputStream(httpExchange.getRequestBody());

        }

        return in;

    }

    // Light weight http server's InputStream.close() throws exception if

    // all the bytes are not read. Work around until it is fixed.

    private static class LWHSInputStream extends FilterInputStream {

        // Workaround for "SJSXP XMLStreamReader.next() closes stream".

        boolean closed;

        boolean readAll;

        LWHSInputStream(InputStream in) {

            super(in);

        }

        void readAll() throws IOException {

            if (!closed && !readAll) {

                ReadAllStream all = new ReadAllStream();

                all.readAll(in, 4000000);

                in.close();

                in = all;

                readAll = true;

            }

        }

        @Override

        public void close() throws IOException {

            if (!closed) {

                readAll();

                super.close();

                closed = true;

            }

        }

    }

    public @NotNull OutputStream getOutput() throws IOException {

        if (out == null) {

            String lenHeader = httpExchange.getResponseHeaders().getFirst("Content-Length");

            int length = (lenHeader != null) ? Integer.parseInt(lenHeader) : 0;

            httpExchange.sendResponseHeaders(getStatus(), length);

            // Light weight http server's OutputStream.close() throws exception if

            // all the bytes are not read on the client side(StreamMessage on the client

            // side doesn't read all bytes.

            out =  new FilterOutputStream(httpExchange.getResponseBody()) {

                boolean closed;

                @Override

                public void close() throws IOException {

                    if (!closed) {

                        closed = true;

                        // lwhs closes input stream, when you close the output stream

                        // This causes problems for streaming in one-way cases

                        in.readAll();

                        try {

                            super.close();

                        } catch(IOException ioe) {

                            // Ignoring purposefully.

                        }

                    }

                }

                // Otherwise, FilterOutpuStream writes byte by byte

                @Override

                public void write(byte[] buf, int start, int len) throws IOException {

                    out.write(buf, start, len);

                }

            };

        }

        return out;

    }

    public @NotNull WebServiceContextDelegate getWebServiceContextDelegate() {

        return this;

    }

    public Principal getUserPrincipal(Packet request) {

        return httpExchange.getPrincipal();

    }

    public boolean isUserInRole(Packet request, String role) {

        return false;

    }

    public @NotNull String getEPRAddress(Packet request, WSEndpoint endpoint) {

        //return WSHttpHandler.getRequestAddress(httpExchange);

        PortAddressResolver resolver = adapter.owner.createPortAddressResolver(getBaseAddress(), endpoint.getImplementationClass());

        String address = resolver.getAddressFor(endpoint.getServiceName(), endpoint.getPortName().getLocalPart());

        if(address==null)

            throw new WebServiceException(WsservletMessages.SERVLET_NO_ADDRESS_AVAILABLE(endpoint.getPortName()));

        return address;

    }

    public String getWSDLAddress(@NotNull Packet request, @NotNull WSEndpoint endpoint) {

        String eprAddress = getEPRAddress(request,endpoint);

        if(adapter.getEndpoint().getPort() != null)

            return eprAddress+"?wsdl";

        else

            return null;

    }

    @Override

    public boolean isSecure() {

        return (httpExchange instanceof HttpsExchange);

    }

    @Override

    @Property(MessageContext.HTTP_REQUEST_METHOD)

    public @NotNull String getRequestMethod() {

        return httpExchange.getRequestMethod();

    }

    @Override

    @Property(MessageContext.QUERY_STRING)

    public String getQueryString() {

        URI requestUri = httpExchange.getRequestURI();

        String query = requestUri.getQuery();

        if (query != null)

            return query;

        return null;

    }

    @Override

    @Property(MessageContext.PATH_INFO)

    public String getPathInfo() {

        URI requestUri = httpExchange.getRequestURI();

        String reqPath = requestUri.getPath();

        String ctxtPath = httpExchange.getHttpContext().getPath();

        if (reqPath.length() > ctxtPath.length()) {

            return reqPath.substring(ctxtPath.length());

        }

        return null;

    }

    @Property(JAXWSProperties.HTTP_EXCHANGE)

    public HttpExchange getExchange() {

        return httpExchange;

    }

    @Override @NotNull

    public String getBaseAddress() {

        /*

         * Computes the Endpoint's address from the request. Use "Host" header

         * so that it has correct address(IP address or someother hostname)

         * through which the application reached the endpoint.

         *

         */

        StringBuilder strBuf = new StringBuilder();

        strBuf.append((httpExchange instanceof HttpsExchange) ? "https" : "http");

        strBuf.append("://");

        String hostHeader = httpExchange.getRequestHeaders().getFirst("Host");

        if (hostHeader != null) {

            strBuf.append(hostHeader);   // Uses Host header

        } else {

            strBuf.append(httpExchange.getLocalAddress().getHostName());

            strBuf.append(":");

            strBuf.append(httpExchange.getLocalAddress().getPort());

        }

        //Do not include URL pattern here

        //strBuf.append(httpExchange.getRequestURI().getPath());

        return strBuf.toString();

    }

    @Override

    public String getProtocol() {

        return httpExchange.getProtocol();

    }

    @Override

    public void setContentLengthResponseHeader(int value) {

        httpExchange.getResponseHeaders().set("Content-Length", ""+value);

    }

        @Override

        public String getRequestURI() {

                return httpExchange.getRequestURI().toString();

        }

        @Override

        public String getRequestScheme() {

                return (httpExchange instanceof HttpsExchange) ? "https" : "http";

        }

        @Override

        public String getServerName() {

                return httpExchange.getLocalAddress().getHostName();

        }

        @Override

        public int getServerPort() {

                return httpExchange.getLocalAddress().getPort();

        }

    protected PropertyMap getPropertyMap() {

        return model;

    }

    private static final PropertyMap model;

    static {

        model = parse(ServerConnectionImpl.class);

    }

}