Unzip data received from web service?

In my Apex 3.0.1 application I am trying to obtain data from a web service. The problem is that the returned data is first zipped and then encoded using base 64 coding.
I can decode the data using the utl_encode package and if I download the result, I can unzip it using winzip to get the original XML message. However, I need to unzip the message within Apex in order to process the content. The Oracle package utl_compress provides uncompression functions for the LZ compression algorithm but this does not seem to be the same as winzip etc.
Thanks for any suggestions anyone might have.

One way would be to use a Java stored procedure to perform the unzipping.

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    =======================================================
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    import java.net.URI;
    import java.rmi.RemoteException;
    import java.util.Calendar;
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    private String PresenceUsername;
    private String PresencePassword;
    private String PresenceRealm;
    private String PresencePort;
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    permissions[i] = pp;
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    pp.setPresenceAttribute(pat); //You always pass in Activity
    pp.setDecision(true); //Put the user on the allow list
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    } catch (Exception e) {
    System.out.println("Publish failed: " + e.toString());
    e.printStackTrace();
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    "/aggregationproxy/presenceconsumerws/presenceconsumer");
    consumer.setMaintainSession(true);
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    PresenceAttributeType pa = PresenceAttributeType.Activity;
    PresenceAttributeType[] pat = new PresenceAttributeType[] { pa };
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    client2.publishPresence("Available",":)");
    client2.subscribePresence();
    URI[] buddy_list3 = {new URI("sip:[email protected]"),new URI("sip:[email protected]"),new URI("sip:[email protected]")};
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    client3.subscribePresence();
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        select full_name,email_address
        into v_scientist_name,v_scientist_email
        from v_users
        where ldap_account = :F140_USER_ID; 
      exception when no_data_found then
        v_scientist_name := '';
        v_scientist_email := '';
        v_scientist_name := 'Test, Christine';
        v_scientist_email := '[email protected]';
      end;
      -- set up xml file 
      if :OWNER like '%DEV%' then
        v_xml_info := '
          <?xml version="1.0" encoding="utf-8"?>
          <exchange xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                    xmlns="deService"
                    xsi:schemaLocation="deService http://mycompany.com/webservices/apexdataexchange/schemas/RTPCATT.xsd">
      else
        v_xml_info := '
          <?xml version="1.0" encoding="utf-8"?>
          <exchange xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                    xmlns="deService"
                    xsi:schemaLocation="deService http://mycompanyprod.com/webservices/apexdataexchange/schemas/RTPCATT.xsd">
      end if;
      -- populate xml header records
      v_xml_header := '<header xmlns="">
        <stdXmlVer>2.0</stdXmlVer>
        <sendingUnit>'||:P36_UNIT_NUMBER||'</sendingUnit>
        <sendingPerson>'||v_scientist_name||'</sendingPerson>
        <notification>'||v_scientist_email||'</notification>
        <creationDate>'||v_create_date||'</creationDate>
      </header>
      <entities xmlns="">
      for rec in build_data loop
        begin
          -- get primas code for current construct
          select fkprimas
          into v_primas_code
          from construct
          where constructid = rec.constructid;
        exception when no_data_found then
          v_primas_code := null;
        end;
        begin
          -- get nominator name for current construct
          select full_name
          into v_nominator_name
          from v_nominators
          where nominator_id = rec.u_nominator;
        exception
          when no_data_found then
            v_nominator_name := null;
          when invalid_number then
            v_nominator_name := catt_pkg.full_name_from_user_id(p_user_id => rec.u_nominator);
            v_nominator_name := 'Test, Christine';
        end;
        v_xml_data := v_xml_data||'
          <Construct>
          <requestBUID>'||rec.u_catt_request_buid||'</requestBUID>
          <requestName>'||rec.u_catt_request_name||'</requestName>
          <cassetteBUID>'||rec.u_catt_cassette_buid||'</cassetteBUID>
          <cassetteName>'||rec.u_catt_cassette_name||'</cassetteName>
          <scientist>'||v_scientist_name||'</scientist>
          <projectNumber>'||v_primas_code||'</projectNumber>
          <subProject>'||rec.u_sub_project||'</subProject>
          <comments>'||rec.description||'</comments>
          <nominator>'||v_nominator_name||'</nominator>
          <goingToVqc>'||rec.u_going_to_vqc||'</goingToVqc>
          <primaryTrait>'||rec.u_primary_trait||'</primaryTrait>
          <sourceMatPrvd>'||rec.u_source_mat_prvd||'</sourceMatPrvd>
          <prokaryoticResistance>'||rec.u_pro_resistance_1||'</prokaryoticResistance>
          <vectorType>'||rec.u_vector_type||'</vectorType>
          <priority>'||rec.u_my_priority||'</priority>
          <immediateTrafo>'||rec.u_immediate_trafo||'</immediateTrafo>
          <newComponent>'||rec.u_new_bps_cmpnt||'</newComponent>
          <componentName>'||rec.u_compnt_name||'</componentName>
          <newComponentDescription>'||rec.u_new_cmpt_desc||'</newComponentDescription>
          <targetCrop>'||rec.u_target_crop||'</targetCrop>
          <Line>'||rec.u_corn_line||'</Line>
          <plantSelection>'||rec.u_plant_selection||'</plantSelection>
          <numOfIndEvents>'||rec.u_num_of_ind_events||'</numOfIndEvents>
          <numOfPlantsPerEvent>'||rec.u_num_plants_per_event||'</numOfPlantsPerEvent>
          <molecularQualityEvents>'||rec.u_molecular_quality_events||'</molecularQualityEvents>
          <toField>'||rec.u_field||'</toField>
          <potentialPhenotype>'||rec.u_potential_phenotype||'</potentialPhenotype>
          </Construct>
      end loop;
      -- complete xml data   
      v_xml_footer := '
          </entities>
        </exchange>
      -- complete submission data
      :P36_XML_SUBMISSION := null;   
      :P36_XML_SUBMISSION := v_xml_info||v_xml_header||v_xml_data||v_xml_footer;
      :P36_XML_SUBMISSION := trim(:P36_XML_SUBMISSION);
    end;Here is an example of :P36_XML_SUBMISSION:
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    Christine
    I should add that once I have nested tags in the xml, I get the Oracle no data found error ("<header xmlns=""> <stdXmlVer>2.0</stdXmlVer> <sendingUnit>10</sendingUnit> </header>"). I f I do not have nested tags in the xml ("<notification>[email protected]</notification> <creationDate>2011-12-20</creationDate>"), I get the web service response (error).
    Edited by: ChristineD on Dec 20, 2011 9:54 AM

    Ok, I think I'm getting closer to thinking this all the way through. When I have used clobs in the past, I've always used the DBMS_CLOB package. I use this to create a temp clob and then make the above calls. I had to go find an example in my own code to remember all of this. So, here is another suggestion... feel free to disregard all the previous code snippets..
    declare
      cursor build_data  is
        select u_catt_request_buid,u_catt_request_name,u_catt_cassette_buid,u_catt_cassette_name
          ,u_project_name,u_sub_project,replace(u_nominator,'ERROR ','') u_nominator
          ,replace(replace(u_going_to_vqc,'Yes','true'),'No','false') u_going_to_vqc
          ,u_promoter,u_cds,u_terminator
          ,u_primary_trait,u_source_mat_prvd,u_pro_resistance_1,u_vector_type
          ,nvl(u_my_priority,'Medium') u_my_priority
          ,replace(replace(u_immediate_trafo,'Yes','true'),'No','false') u_immediate_trafo
          ,replace(replace(u_new_bps_cmpnt,'Yes','true'),'No','false') u_new_bps_cmpnt
          ,u_compnt_name,u_new_cmpt_desc,initcap(u_target_crop) u_target_crop,u_corn_line
          ,u_plant_selection,u_num_of_ind_events,u_num_plants_per_event,u_molecular_quality_events
          ,replace(replace(u_field,'Yes','true'),'No','false') u_field
          ,u_t1_seed_request,u_potential_phenotype,u_submission_date
          ,u_sequence_length,u_trait,u_frst_parent,u_frst_parent_vshare_id,u_cds_vshare_id
          ,constructid,cassetteid,description
        from temp_constructs_lims
        order by constructid,description;
      v_xml_info         varchar2(350);
      v_xml_header       varchar2(1000);
      v_xml_data         clob;
      v_xml_footer       varchar2(50);
      v_create_date      varchar2(10);
      v_scientist_name   v_users.full_name%type;
      v_scientist_email  v_users.email_address%type;
      v_primas_code      construct.fkprimas%type;
      v_nominator_name   v_nominators.full_name%type;
      v_file_length      number;
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      v_page_item    varchar2(32767);  --added by AustinJ
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      -- initialize variables
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      --v_xml_data := null;   --commented out by AustinJ
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      dbms_lob.open( v_xml_data, dbms_lob.lob_readwrite );  --added by AustinJ
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      begin
        select full_name,email_address
        into v_scientist_name,v_scientist_email
        from v_users
        where ldap_account = :F140_USER_ID; 
      exception when no_data_found then
        v_scientist_name := '';
        v_scientist_email := '';
        v_scientist_name := 'Test, Christine';
        v_scientist_email := '[email protected]';
      end;
      -- set up xml file 
      if :OWNER like '%DEV%' then
        v_xml_info := '
          <?xml version="1.0" encoding="utf-8"?>
          <exchange xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                    xmlns="deService"
                    xsi:schemaLocation="deService http://mycompany.com/webservices/apexdataexchange/schemas/RTPCATT.xsd">
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        v_xml_info := '
          <?xml version="1.0" encoding="utf-8"?>
          <exchange xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                    xmlns="deService"
                    xsi:schemaLocation="deService http://mycompanyprod.com/webservices/apexdataexchange/schemas/RTPCATT.xsd">
      end if;
      -- populate xml header records
      v_xml_header := '<header xmlns="">
        <stdXmlVer>2.0</stdXmlVer>
        <sendingUnit>'||:P36_UNIT_NUMBER||'</sendingUnit>
        <sendingPerson>'||v_scientist_name||'</sendingPerson>
        <notification>'||v_scientist_email||'</notification>
        <creationDate>'||v_create_date||'</creationDate>
      </header>
      <entities xmlns="">
      for rec in build_data loop
        begin
          -- get primas code for current construct
          select fkprimas
          into v_primas_code
          from construct
          where constructid = rec.constructid;
        exception when no_data_found then
          v_primas_code := null;
        end;
        begin
          -- get nominator name for current construct
          select full_name
          into v_nominator_name
          from v_nominators
          where nominator_id = rec.u_nominator;
        exception
          when no_data_found then
            v_nominator_name := null;
          when invalid_number then
            v_nominator_name := catt_pkg.full_name_from_user_id(p_user_id => rec.u_nominator);
            v_nominator_name := 'Test, Christine';
        end;
        v_xml_body := '
          <Construct>
          <requestBUID>'||rec.u_catt_request_buid||'</requestBUID>
          <requestName>'||rec.u_catt_request_name||'</requestName>
          <cassetteBUID>'||rec.u_catt_cassette_buid||'</cassetteBUID>
          <cassetteName>'||rec.u_catt_cassette_name||'</cassetteName>
          <scientist>'||v_scientist_name||'</scientist>
          <projectNumber>'||v_primas_code||'</projectNumber>
          <subProject>'||rec.u_sub_project||'</subProject>
          <comments>'||rec.description||'</comments>
          <nominator>'||v_nominator_name||'</nominator>
          <goingToVqc>'||rec.u_going_to_vqc||'</goingToVqc>
          <primaryTrait>'||rec.u_primary_trait||'</primaryTrait>
          <sourceMatPrvd>'||rec.u_source_mat_prvd||'</sourceMatPrvd>
          <prokaryoticResistance>'||rec.u_pro_resistance_1||'</prokaryoticResistance>
          <vectorType>'||rec.u_vector_type||'</vectorType>
          <priority>'||rec.u_my_priority||'</priority>
          <immediateTrafo>'||rec.u_immediate_trafo||'</immediateTrafo>
          <newComponent>'||rec.u_new_bps_cmpnt||'</newComponent>
          <componentName>'||rec.u_compnt_name||'</componentName>
          <newComponentDescription>'||rec.u_new_cmpt_desc||'</newComponentDescription>
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          <plantSelection>'||rec.u_plant_selection||'</plantSelection>
          <numOfIndEvents>'||rec.u_num_of_ind_events||'</numOfIndEvents>
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          <molecularQualityEvents>'||rec.u_molecular_quality_events||'</molecularQualityEvents>
          <toField>'||rec.u_field||'</toField>
          <potentialPhenotype>'||rec.u_potential_phenotype||'</potentialPhenotype>
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        ';    --modified by AustinJ
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      end loop;
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      v_xml_footer := '
          </entities>
        </exchange>
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      v_page_item := null;   
      v_page_item := v_xml_info||v_xml_header||wwv_flow.do_substitutions(wwv_flow_utilities.clob_to_varchar2(v_xml_data))||v_xml_footer;   --added by AustinJ
      :P36_XML_SUBMISSION := trim(v_page_item);   --added by AustinJ
        dbms_lob.close( v_xml_data);  --added by AustinJ
        if v_xml_data is not null then   
            dbms_lob.freetemporary(v_xml_data);   --added by AustinJ
        end if;  --added by AustinJ
    end;This code will use the Database to construct your clob and then convert it back to a varchar2 for output to your webservice. This makes more sense to me now and hopefully you can follow what the process is doing.
    You don't technically need the two varchar2(36767) variables. I used two for naming convention clarity sake. You could use just one multipurpose variable instead.
    If you have any questions, just ask. I'll help if I can.
    Austin
    Edited by: AustinJ on Dec 20, 2011 12:17 PM
    Fixed spelling mistakes.

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