HTTP Post Action Block

Question

Greetings all,
I am using a HTTP Post Action in BLS - Vs 11.5. 
The objective is to return a HTTP string from a jsp page, so I can scrap the page. 
The URL:  http://mospublic.ercot.com/ercot/jsp/balancing_services_mcp.jsp?marketdate=2008-06-16   (obviously you might have to change the date to Yesterdays Date)
I have set up the HTTP Post Action with
URL Address of:   http://mospublic.ercot.com/ercot/jsp/balancing_services_mcp.jsp
Post Document:   marketdate=2008-06-16
Encoding: UTF-8
ID and Password are provided
Content Type:   application/x-www-form-urlencoded
Post_0.ReturnAsString comes back with typical HTML content for Today's Date.
Testing has shown that on a fresh IE window.  Using the above url will show today's data. 
Hitting this url again the second time will get the browser to yesterday's data.
So any suggestions on how to make this happen. 
(btw, I have no control over the external public ERCOT website so changing thier jsp page isn't an option.)
Anyway we could emulate that action in BLS - v11.5?
Thanks
Dennis

Answer 1

It's not working for me???
Did that work for you?
I have attached my sample... It's a repeater, a http Post and a tracer. 
<?xml version="1.0" encoding="UTF-8"?>
<Transaction xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
     <TransactionAttributes>
          <ContextItem>
               <Name>Description</Name>
               <Description>Transaction Description</Description>
               <MinRange>0</MinRange>
               <MaxRange>0</MaxRange>
               <Value xsi:type="xsd:string"/>
               <ReadOnly>true</ReadOnly>
          </ContextItem>
     </TransactionAttributes>
     <Name>west_test/html Post Question</Name>
     <Version>1</Version>
     <WriterRoles/>
     <ReaderRoles/>
     <Context/>
     <Local/>
     <Layout>
          <GUILayoutItem>
               <Name>Sequence</Name>
               <X>8</X>
               <Y>8</Y>
               <Width>120</Width>
               <SpacingWidth>120</SpacingWidth>
               <DescendantWidth>120</DescendantWidth>
               <Height>96</Height>
          </GUILayoutItem>
          <GUILayoutItem>
               <Name>Post_0</Name>
               <X>16</X>
               <Y>24</Y>
               <Width>104</Width>
               <SpacingWidth>0</SpacingWidth>
               <DescendantWidth>0</DescendantWidth>
               <Height>72</Height>
          </GUILayoutItem>
          <GUILayoutItem>
               <Name>Sequence_0</Name>
               <X>8</X>
               <Y>136</Y>
               <Width>120</Width>
               <SpacingWidth>120</SpacingWidth>
               <DescendantWidth>0</DescendantWidth>
               <Height>96</Height>
          </GUILayoutItem>
          <GUILayoutItem>
               <Name>Tracer_0</Name>
               <X>16</X>
               <Y>152</Y>
               <Width>104</Width>
               <SpacingWidth>0</SpacingWidth>
               <DescendantWidth>0</DescendantWidth>
               <Height>72</Height>
          </GUILayoutItem>
     </Layout>
     <Actions>
          <ContextItem>
               <Name>Post_0</Name>
               <Description/>
               <MinRange>0</MinRange>
               <MaxRange>0</MaxRange>
               <Value xsi:type="Post">
                    <URL>http://mospublic.ercot.com/ercot/jsp/balancing_services_mcp.jsp?marketdate=2008-06-18</URL>
                    <Encoding>UTF-8</Encoding>
                    <ContentType>text/html</ContentType>
                    <Timeout>60</Timeout>
                    <UserName>YOUSUPPLY</UserName>
                    <PostData/>
                    <UserPassword>YOUROWN</UserPassword>
                    <ReturnAsString/>
                    <ReturnAsXML>
                         <ReferenceDocumentSource/>
                    </ReturnAsXML>
               </Value>
               <ReadOnly>false</ReadOnly>
          </ContextItem>
          <ContextItem>
               <Name>Tracer_0</Name>
               <Description/>
               <MinRange>0</MinRange>
               <MaxRange>0</MaxRange>
               <Value xsi:type="Tracer">
                    <Level>INFO</Level>
                    <Message/>
               </Value>
               <ReadOnly>false</ReadOnly>
          </ContextItem>
     </Actions>
     <Steps>
          <Step xsi:type="ActionSequence">
               <Name>Sequence</Name>
               <Description/>
               <Steps>
                    <Step xsi:type="ActionSequence">
                         <Name>Sequence_0</Name>
                         <Description/>
                         <Steps/>
                         <Actions>
                              <Action>
                                   <Name>Tracer_0</Name>
                                   <Description/>
                                   <IncomingLinks>
                                        <Assign xsi:type="Assign">
                                             <Name/>
                                             <Description/>
                                             <To>Tracer_0.Message</To>
                                             <From>Post_0.ReturnAsString</From>
                                        </Assign>
                                   </IncomingLinks>
                                   <OutgoingLinks/>
                              </Action>
                         </Actions>
                    </Step>
               </Steps>
               <Actions>
                    <Action>
                         <Name>Post_0</Name>
                         <Description/>
                         <IncomingLinks>
                              <Assign xsi:type="Assign">
                                   <Name/>
                                   <Description/>
                                   <To>Post_0.URL</To>
                                   <From>"http://mospublic.ercot.com/ercot/jsp/balancing_services_mcp.jsp?marketdate=" &amp; datefromxmlformat( datenow, "yyyy-MM-dd")"</From>
                              </Assign>
                         </IncomingLinks>
                         <OutgoingLinks/>
                    </Action>
               </Actions>
          </Step>
     </Steps>
</Transaction>