# ConnectRequestFilter.java

    /*
    ** Module   : ConnectRequestFilter.java
    ** Abstract : Implementation of the builtin class.
    **
    ** Copyright (c) 2020-2023, Golden Code Development Corporation.
    **
    ** -#- -I- --Date-- -------------------------------Description--------------------------------
    ** 001 MP  20200603 First version, stubs taken by converting the skeleton using FWD.
    ** 002 MP  20200707 Add code in constructor and methods
    ** 003 MP  20210106 Improve code based on existing tests - as OE12.2
    *
    ** 004 CA  20210221 Fixed 'qualified', 'extent' and 'returns' annotations at the legacy
    **                  signature.
    **     CA  20220923 Variable definitions (including associated with parameters) must be done always outside of
    **                  the BlockManager API
    ** 005 CA  20231113 The 'execute' method must be annotated with LegacySignature Type.Execute, and also can be
    **                  dropped if is a no-op.
    */

    /*
    ** This program is free software: you can redistribute it and/or modify
    ** it under the terms of the GNU Affero General Public License as
    ** published by the Free Software Foundation, either version 3 of the
    ** License, or (at your option) any later version.
    **
    ** This program 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 Affero General Public License for more details.
    **
    ** You may find a copy of the GNU Affero GPL version 3 at the following
    ** location: https://www.gnu.org/licenses/agpl-3.0.en.html
    **
    ** Additional terms under GNU Affero GPL version 3 section 7:
    **
    **   Under Section 7 of the GNU Affero GPL version 3, the following additional
    **   terms apply to the works covered under the License.  These additional terms
    **   are non-permissive additional terms allowed under Section 7 of the GNU
    **   Affero GPL version 3 and may not be removed by you.
    **
    **   0. Attribution Requirement.
    **
    **     You must preserve all legal notices or author attributions in the covered
    **     work or Appropriate Legal Notices displayed by works containing the covered
    **     work.  You may not remove from the covered work any author or developer
    **     credit already included within the covered work.
    **
    **   1. No License To Use Trademarks.
    **
    **     This license does not grant any license or rights to use the trademarks
    **     Golden Code, FWD, any Golden Code or FWD logo, or any other trademarks
    **     of Golden Code Development Corporation. You are not authorized to use the
    **     name Golden Code, FWD, or the names of any author or contributor, for
    **     publicity purposes without written authorization.
    **
    **   2. No Misrepresentation of Affiliation.
    **
    **     You may not represent yourself as Golden Code Development Corporation or FWD.
    **
    **     You may not represent yourself for publicity purposes as associated with
    **     Golden Code Development Corporation, FWD, or any author or contributor to
    **     the covered work, without written authorization.
    **
    **   3. No Misrepresentation of Source or Origin.
    **
    **     You may not represent the covered work as solely your work.  All modified
    **     versions of the covered work must be marked in a reasonable way to make it
    **     clear that the modified work is not originating from Golden Code Development
    **     Corporation or FWD.  All modified versions must contain the notices of
    **     attribution required in this license.
    */

    package com.goldencode.p2j.oo.net.http.filter.payload;

    import com.goldencode.p2j.util.*;
    import com.goldencode.p2j.util.BlockManager.Action;
    import com.goldencode.p2j.util.BlockManager.Condition;

    import static com.goldencode.p2j.report.ReportConstants.CVT_LVL_FULL;
    import static com.goldencode.p2j.report.ReportConstants.RT_LVL_FULL;
    import static com.goldencode.p2j.util.BlockManager.*;
    import static com.goldencode.p2j.util.InternalEntry.Type;

    import com.goldencode.p2j.oo.core.Assert;
    import com.goldencode.p2j.oo.core.ByteBucket;
    import com.goldencode.p2j.oo.lang.AppError;
    import com.goldencode.p2j.oo.net.http.IhttpRequest;

    /**
     * Business logic (converted to Java from the 4GL source code
     * in OpenEdge/Net/HTTP/Filter/Payload/ConnectRequestFilter.cls).
     */
    @LegacyResource(resource = "OpenEdge.Net.HTTP.Filter.Payload.ConnectRequestFilter")
    @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_FULL)
    public class ConnectRequestFilter
    extends com.goldencode.p2j.oo.net.http.filter.payload.MessageWriter
    {

       @LegacySignature(type = Type.EXECUTE)
       public void __net_http_filter_payload_ConnectRequestFilter_execute__()
       {
          onBlockLevel(Condition.ERROR, Action.THROW);
       }

       @LegacySignature(type = Type.CONSTRUCTOR)
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_FULL)
       public void __net_http_filter_payload_ConnectRequestFilter_constructor__()
       {
          internalProcedure(ConnectRequestFilter.class, this, "__net_http_filter_payload_ConnectRequestFilter_constructor__", new Block((Body) () ->
          {
             __net_http_filter_payload_MessageWriter_constructor__(ObjectOps.getLegacyClass(ByteBucket.class));
          }));
       }

       @LegacySignature(returns = "INT64", type = Type.METHOD, name = "Write", parameters =
       {
          @LegacyParameter(name = "pData", type = "OBJECT", qualified = "progress.lang.object", mode = "INPUT")
       })
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_FULL)
       @Override
       public int64 write(final object<? extends com.goldencode.p2j.oo.lang._BaseObject_> _pData)
       {
          object<? extends com.goldencode.p2j.oo.lang._BaseObject_> pData = TypeFactory.initInput(_pData);
          longchar CRLF = TypeFactory.longchar("~r~n");

          return function(ConnectRequestFilter.class, this, "Write", int64.class, new Block((Body) () ->
          {

             Assert.isType(pData, ObjectOps.getLegacyClass(IhttpRequest.class));
             int64 prevSize = bucket().getSize();
             object<? extends IhttpRequest> req = ObjectOps.cast(pData, IhttpRequest.class);

             Assert.notNull(req.ref().getUri(), new character("Request URI"));
             character host = new character(req.ref().getUri().ref().getHost());
             integer port = new integer(req.ref().getUri().ref().getPort());

             Assert.notNullOrEmpty(host, new character("Host name"));
             if(port.isUnknown())
             {
                String scheme = req.ref().getUri().ref().getScheme().getValue();

                if( scheme.equals("http"))
                {
                   port.assign(80);
                }
                if( scheme.equals("https"))
                {
                   port.assign(443);
                }
             }
             Assert.notNullOrZero(port, new character("Port"));
             if(port.intValue() > 65535)
             {
                undoThrowTopLevel(AppError.newInstance(TextOps.substitute("Port is too large: &1 (max allowed: 65535)", port.intValue()).getValue(), 0));
             }
             character reqUri = new character(TextOps.substitute("&1:&2", host.getValue(), port.intValue()));

             //add connect line
             bucket().putString(new longchar(TextOps.substitute("CONNECT &1 &2", reqUri, req.ref().getVersion())));
             bucket().putString(CRLF);

             //add headers
             bucket().putString(new longchar(TextOps.substitute("Host: &1", reqUri)));
             bucket().putString(CRLF);

             bucket().putString(new longchar(req.ref().getHeader(new character("User-Agent")).ref().toLegacyString()));
             bucket().putString(CRLF);

             bucket().putString(new longchar("Connection: keep-alive"));
             bucket().putString(CRLF);

             //add final CRLF who indicate end of headers
             bucket().putString(CRLF);

             returnNormal(MathOps.minus(bucket().getSize(), prevSize));

          }));
       }
    }