# DefaultRequestFilter.java

    /*
    ** Module   : DefaultRequestFilter.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  20210108 Adapt error message and do a cast for method access
    **     ME  20210204 Fix writeMessage and extractEntity methods.
    ** 003 CA  20210221 Fixed 'qualified', 'extent' and 'returns' annotations at the legacy signature.
    **     CA  20220120 Do not used TypeFactory.object when the OO reference must not be tracked or registered.
    **                  Do not use TypeFactory.object for internal usages, use ObjectVar if the reference must
    **                  be tracked.
    **                  All TypeFactory.object variable definitions must be done outside of the top-level block.
    ** 004 ME  20210929 Fixed return object on extractEntity.
    **     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.
    ** 006 AL2 20240930 Delete temporary ByteBuckets; they are still in memory due to positive reference count.
    */

    /*
    ** 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_STUB;
    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 java.util.concurrent.atomic.AtomicReference;

    import com.goldencode.p2j.oo.core.ByteBucket;
    import com.goldencode.p2j.oo.core.HashAlgorithmEnum;
    import com.goldencode.p2j.oo.core.IAdaptable;
    import com.goldencode.p2j.oo.core.assertion.AssertObject;
    import com.goldencode.p2j.oo.lang.AppError;
    import com.goldencode.p2j.oo.lang._BaseObject_;

    import static com.goldencode.p2j.util.character.*;
    import com.goldencode.p2j.oo.net.ISupportEncoding;
    import com.goldencode.p2j.oo.net.ISupportMultipartEntity;
    import com.goldencode.p2j.oo.net.ISupportTransferEncoding;
    import com.goldencode.p2j.oo.net.http.HttpHeader;
    import com.goldencode.p2j.oo.net.http.ISupportProxy;
    import com.goldencode.p2j.oo.net.http.IhttpRequest;
    import com.goldencode.p2j.oo.net.http.TransferEncodingEnum;
    import com.goldencode.p2j.oo.net.http.filter.writer.BodyWriterBuilder;
    import com.goldencode.p2j.oo.net.http.filter.writer.MessageWriterBuilder;

    /**
     * Business logic (converted to Java from the 4GL source code
     * in OpenEdge/Net/HTTP/Filter/Payload/DefaultRequestFilter.cls).
     */
    @LegacyResource(resource = "OpenEdge.Net.HTTP.Filter.Payload.DefaultRequestFilter")
    @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_STUB)
    public class DefaultRequestFilter
    extends com.goldencode.p2j.oo.net.http.filter.payload.MessageWriter
    {
       @LegacySignature(type = Type.EXECUTE)
       public void __net_http_filter_payload_DefaultRequestFilter_execute__()
       {
          onBlockLevel(Condition.ERROR, Action.THROW);
       }

       @LegacySignature(type = Type.CONSTRUCTOR)
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_FULL)
       public void __net_http_filter_payload_DefaultRequestFilter_constructor__()
       {
          internalProcedure(DefaultRequestFilter.class, this, "__net_http_filter_payload_DefaultRequestFilter_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 = "poData", type = "OBJECT", qualified = "progress.lang.object", mode = "INPUT")
       })
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_STUB)
       @Override
       public int64 write(final object<? extends _BaseObject_> _poData)
       {
          object<? extends _BaseObject_> poData = TypeFactory.initInput(_poData);

          return function(DefaultRequestFilter.class, this, "Write", int64.class, new Block((Body) () ->
          {
             AssertObject.isType(poData, ObjectOps.getLegacyClass(IhttpRequest.class));

             int64 prevSize = bucket().getSize();

             this.writeMessage(ObjectOps.cast(poData, IhttpRequest.class));

             int64 actualSize = bucket().getSize();

             returnNormal(actualSize.intValue() - prevSize.intValue());

          }));
       }

       @LegacySignature(type = Type.METHOD, name = "WriteMessage", parameters =
       {
          @LegacyParameter(name = "poRequest", type = "OBJECT", qualified = "openedge.net.http.ihttprequest", mode = "INPUT")
       })
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_STUB)
       protected void writeMessage(final object<? extends IhttpRequest> _poRequest)
       {
          object<? extends IhttpRequest> poRequest = TypeFactory.initInput(_poRequest);
          object<? extends ByteBucket> oByteBucket = TypeFactory.object(ByteBucket.class);

          internalProcedure(DefaultRequestFilter.class, this, "WriteMessage", new Block((Body) () ->
          {
             if (poRequest.ref().getEntity()._isValid())
             {
                oByteBucket.assign(this.extractEntity(poRequest));
             }
             else
             {
                poRequest.ref().removeHeader(new character("Content-Type"));
                poRequest.ref().removeHeader(new character("Content-Length"));
             }

             this.writeRequestLine(poRequest);
             this.writeHeaders(poRequest);

             bucket().putString(new longchar(TextOps.concat(chr(13), chr(10))));

             if (poRequest.ref().getContentLength().intValue() > 0)
             {
                bucket().putBytes(oByteBucket);
             }
          },
          (Fini) () ->
          {
             if (oByteBucket._isValid())
             {
                ObjectOps.delete(oByteBucket);
             }
          }));
       }

       @LegacySignature(returns = "OBJECT", type = Type.METHOD, name = "ExtractEntity", qualified = "openedge.core.bytebucket", parameters =
       {
          @LegacyParameter(name = "poRequest", type = "OBJECT", qualified = "openedge.net.http.ihttprequest", mode = "INPUT")
       })
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_STUB)
       protected object<? extends ByteBucket> extractEntity(final object<? extends IhttpRequest> _poRequest)
       {
          object<? extends IhttpRequest> poRequest = TypeFactory.initInput(_poRequest);
          object<? extends ByteBucket> oMessageBody = TypeFactory.object(ByteBucket.class);

          return function(DefaultRequestFilter.class, this, "ExtractEntity", object.class, new Block((Body) () ->
          {
             oMessageBody.assign(ByteBucket.instance());

             object<? extends MessageWriterBuilder> oMWB = BodyWriterBuilder.build_1(poRequest);
             object<? extends MessageWriter> oBodyWriter = oMWB.ref().writeTo(oMessageBody).ref().getWriter();

             if (!oBodyWriter._isValid())
             {
                character errMsg = TextOps.substitute("Unable to build request for transmission: no builder available for Content-Type: &1",
                         poRequest.ref().getContentType());
                logger.ref().error(errMsg);
                undoThrow(AppError.newInstance(errMsg, new integer(0)));
             }

             oBodyWriter.ref().open();
             int64 iBytesWritten = oBodyWriter.ref().write(poRequest.ref().getEntity());
             oBodyWriter.ref().close();

             if (ObjectOps.typeOf(oBodyWriter, ISupportEncoding.class).booleanValue())
             {
                object<? extends ISupportEncoding> oSuppEnc = ObjectOps.cast(oBodyWriter, ISupportEncoding.class);
                poRequest.ref().setCharacterEncoding(oSuppEnc.ref().getEncoding());
             }
             if (ObjectOps.typeOf(oBodyWriter, ISupportMultipartEntity.class).booleanValue())
             {
                object<? extends ISupportMultipartEntity> oSuppMultiEnt = ObjectOps.cast(oBodyWriter, ISupportMultipartEntity.class);
                poRequest.ref().getHeader(new character("Content-Type")).ref().setParameterValue(new character("boundary"), oSuppMultiEnt.ref().getBoundary());
             }
             if (ObjectOps.typeOf(oBodyWriter, ISupportTransferEncoding.class).booleanValue())
             {
                object<? extends ISupportTransferEncoding> oSuppTransfEnc = ObjectOps.cast(oBodyWriter, ISupportTransferEncoding.class);
                poRequest.ref().setTransferEncoding(oSuppTransfEnc.ref().getTransferEncoding());
             }

             poRequest.ref().setContentLength(new integer(iBytesWritten));
             oMessageBody.assign(ObjectOps.cast(oBodyWriter.ref().getEntity(), ByteBucket.class));
             poRequest.ref().setContentMd5(oMessageBody.ref().getHash(HashAlgorithmEnum.md5));

             returnNormal(oMessageBody);
          }));
       }

       @LegacySignature(type = Type.METHOD, name = "WriteRequestLine", parameters =
       {
          @LegacyParameter(name = "poRequest", type = "OBJECT", qualified = "openedge.net.http.ihttprequest", mode = "INPUT")
       })
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_STUB)
       protected void writeRequestLine(final object<? extends IhttpRequest> _poRequest)
       {
          object<? extends IhttpRequest> poRequest = TypeFactory.initInput(_poRequest);
          object<? extends ISupportProxy> oSuppProxy = TypeFactory.object(ISupportProxy.class);
          character cReqUri = TypeFactory.character();

          internalProcedure(DefaultRequestFilter.class, this, "WriteRequestLine", new Block((Body) () ->
          {
             if (ObjectOps.typeOf(poRequest, IAdaptable.class).booleanValue())
             {
                object<? extends IAdaptable> oIAdapt = ObjectOps.cast(poRequest, IAdaptable.class);
                object<? extends _BaseObject_> oLegClass = oIAdapt.ref().getAdapter(ObjectOps.getLegacyClass(ISupportProxy.class));
                oSuppProxy.assign(ObjectOps.cast(oLegClass, ISupportProxy.class));
             }
             else if (ObjectOps.typeOf(poRequest, ISupportProxy.class).booleanValue())
             {
                oSuppProxy.assign(ObjectOps.cast(poRequest, ISupportProxy.class));
             }

             if (oSuppProxy._isValid() && oSuppProxy.ref().getProxyURI()._isValid())
             {
                cReqUri.assign(ObjectOps.cast(oSuppProxy, IhttpRequest.class).ref().getUri().ref().encode());
             }
             else
             {
                cReqUri.assign(TextOps.concat(poRequest.ref().getUri().ref().getPath(),
                         poRequest.ref().getUri().ref().encodeQuery()));
             }

             character cMsg = TextOps.concat(
                      TextOps.toUpperCase(poRequest.ref().getMethod()), " ",
                      cReqUri, " ",
                      poRequest.ref().getVersion(),
                      chr(13), chr(10));

             bucket().putString(new longchar(cMsg));

          }));
       }

       @LegacySignature(type = Type.METHOD, name = "WriteHeaders", parameters =
       {
          @LegacyParameter(name = "poRequest", type = "OBJECT", qualified = "openedge.net.http.ihttprequest", mode = "INPUT")
       })
       @LegacyResourceSupport(supportLvl = CVT_LVL_FULL|RT_LVL_FULL)
       protected void writeHeaders(final object<? extends IhttpRequest> _poRequest)
       {
          object<? extends IhttpRequest> poRequest = TypeFactory.initInput(_poRequest);
          object[][] headers = { TypeFactory.objectExtent(HttpHeader.class, false) };

          internalProcedure(DefaultRequestFilter.class, this, "WriteHeaders", new Block((Body) () ->
          {
             int nh = _poRequest.ref().getHeaders(
                      new OutputExtentParameter<object<? extends HttpHeader>>()
                      {
                         @Override
                         public object<? extends HttpHeader>[] getVariable()
                         {
                            return headers[0];
                         }

                         @Override
                         public void setVariable(object<? extends HttpHeader>[] reference)
                         {
                            headers[0] = reference;
                         }
                      }).intValue();

             for (int i = nh - 1; i >= 0; i--)
             {
                object<? extends HttpHeader> hdr = headers[0][i];
                character cMsg = TextOps.concat(hdr.ref().toLegacyString(), chr(13), chr(10));
                bucket().putString(new longchar(cMsg));
             }

             if (!poRequest.ref().hasHeader(new character("Accept")).booleanValue())
             {
                character cMsg = TextOps.concat("Accept: */*", chr(13), chr(10));
                bucket().putString(new longchar(cMsg));
             }

             if (!CompareOps._isEqual(poRequest.ref().getTransferEncoding(), TransferEncodingEnum.none.ref().toLegacyString()))
             {
                character cMsg = TextOps.concat("Accept-Encoding: ", TextOps.toLowerCase(poRequest.ref().getTransferEncoding()),
                         chr(13), chr(10));
                bucket().putString(new longchar(cMsg));
             }

          }));
       }
    }