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Extract data and value from REST

Question asked by DigiSV on Apr 6, 2017
Latest reply on Apr 10, 2017 by DigiSV

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Hi Team,

I have below request coming in lisa.vse.request and the requirement is to extract Argument e.g.URLPARAM0, metaData properties e.g. Postman-Token unique to a transaction (assuming this doesn't change) and if it matches certain value send it to virtual invocation else continue with live. This is little urgent appreciate if you can look into this and help me.

Possible solution I could think is to write assertion script in listener step to capture the incoming data and set execution method to Live.

lisa.vse.request ] {id=0, operation="GET /v1/A1/{URLPARAM0}/{URLPARAM1}/abcd/", arguments=URLPARAM0=12345678901234&URLPARAM1=4, attributes=, metaData=HTTP-Method=GET&HTTP-URI=/v1/A1/12345678901234/4/abcd&HTTP-Version=1.1&Host=localhost:31156&Connection=keep-alive&Cache-Control=no-cache&User-Agent=Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36&Postman-Token=3d793263-8b53-c2d4-157a-b978252eaefa&Accept=*/*&Accept-Encoding=gzip, deflate, sdch, br&Accept-Language=en-US,en;q=0.8&lisa.vse.request.client.id=0:0:0:0:0:0:0:1:53811, matchTolerance=Exact, binary=false, body=(non-binary)<null>]

Rick.Brown

Apr 10, 2017 12:57 PM

Correct Answer

That will search the request for the string "URLPARAM0", rather than searching for the string "77741900528607".

I see the same error only when I set my responseBody to null, which leads me to think that the body is blank, and the request message is just a GET.

If this is the case, it's the whole request message we want, instead of lisa_vse_request.getBodyText().

Change the line:

requestMessage = lisa_vse_request.getBodyText();

to:

requestMessage = lisa_vse_request.toString();

This brings back the entire request, including your URL arguments, rather than just the request body, and should allow the "contains" to work as expected.

See the reply in context

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Rick.Brown

Apr 6, 2017 1:40 PM

You could run your virtual service in "Dynamic" mode, and then put something like this in the Routing step

requestMessage = lisa_vse_request.getBodyText();

Postman_Token="3d793263-8b53-c2d4-157a-b978252eaefa";

if requestMessage.contains(Postman_Token) return ExecutionMode.EFFICIENT;

return ExecutionMode.LIVE;

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DigiSV @ Rick.Brown on Apr 7, 2017 11:14 AM

Thanks Rick. Did you mean in router step replace default entries import com.itko.lisa.vse.ExecutionMode;

return ExecutionMode.EFFICIENT; to the one you mentioned above? Also please let me know if I need to import any class

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Prem_Bairoliya

@ DigiSV on Apr 7, 2017 3:52 PM

You will need to keep the following line & replace the rest with the code mentioned by Rick.Brown

import com.itko.lisa.vse.ExecutionMode;

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DigiSV @ Prem_Bairoliya on Apr 8, 2017 7:53 PM

Prem_Bairoliya and Rick.Brown..version I am using is 7.5.2. when above code is run in "DYNAMIC" mode I am getting step error | Message: An error occurred resolving dynamic execution mode to a concrete mode, however have not seen this error when I run in "LIVE" mode.

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Rick.Brown

@ DigiSV on Apr 10, 2017 10:43 AM

Please post the contents of your router step. My pseudo-code isn't syntax-checked, so I'm sure it needs modification.

Doing a quick visual syntax check (I added brackets to the "if" line), I think your Router step should read like this:

import com.itko.lisa.vse.ExecutionMode;

requestMessage = lisa_vse_request.getBodyText();

Postman_Token="3d793263-8b53-c2d4-157a-b978252eaefa";

if(requestMessage.contains(Postman_Token)) return ExecutionMode.EFFICIENT;

return ExecutionMode.LIVE;

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DigiSV @ Rick.Brown on Apr 10, 2017 11:11 AM

Hi Rick, below is the code..

import com.itko.lisa.vse.ExecutionMode;
requestMessage = lisa_vse_request.getBodyText();
URLPARAM0="77741900528607";
if (requestMessage.contains(URLPARAM0)) return ExecutionMode.EFFICIENT;
return ExecutionMode.LIVE;

============================================================================
| LISA Exception:
============================================================================
| Step: Virtual Service Execution Router
----------------------------------------------------------------------------
| Message: An error occurred resolving dynamic execution mode to a concrete mode.
----------------------------------------------------------------------------
| Trapped Exception: Sourced file: inline evaluation of: ``// This script must return either an enum entry from ExecutionMode or // a stri . . . ''
| Trapped Message: Sourced file: inline evaluation of: ``// This script must return either an enum entry from ExecutionMode or // a stri . . . '' : at Line: 8 : in file: inline evaluation of: ``// This script must return either an enum entry from ExecutionMode or // a stri . . . '' : requestMessage .contains ( URLPARAM0 )

Target exception: java.lang.NullPointerException: Null Pointer in Method Invocation

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Joel NeSmith @ DigiSV on Apr 10, 2017 12:39 PM

Add quote marks ( " ) around URLPARAM0 on line 8. You need to send a string to the .contains method.

if (requestMessage.contains( "URLPARAM0" ) )

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Rick.Brown

@ Joel NeSmith on Apr 10, 2017 12:57 PM

That will search the request for the string "URLPARAM0", rather than searching for the string "77741900528607".

I see the same error only when I set my responseBody to null, which leads me to think that the body is blank, and the request message is just a GET.

If this is the case, it's the whole request message we want, instead of lisa_vse_request.getBodyText().

Change the line:

requestMessage = lisa_vse_request.getBodyText();

to:

requestMessage = lisa_vse_request.toString();

This brings back the entire request, including your URL arguments, rather than just the request body, and should allow the "contains" to work as expected.

Actions

Joel NeSmith @ Rick.Brown on Apr 10, 2017 1:11 PM

Yep, sorry 'bout that. Brain spasm. I was thinking parameter list contains key not the string requestMessage.

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Rick.Brown

@ Joel NeSmith on Apr 10, 2017 1:24 PM

A less of a sledgehammer way would be to use a getAttributes parameter list, so you're right, but it would mean some extra lines of scripting, and would need to be aware if the attribute had been moved to an argument (all too much work for me )

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DigiSV Apr 10, 2017 1:53 PM

Thanks Rick.Brown J_NeSmith ..working now .

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11 Replies

Rick.Brown Apr 6, 2017 1:40 PM
Mark Correct
Correct Answer
You could run your virtual service in "Dynamic" mode, and then put something like this in the Routing step

requestMessage = lisa_vse_request.getBodyText();
Postman_Token="3d793263-8b53-c2d4-157a-b978252eaefa";
if requestMessage.contains(Postman_Token) return ExecutionMode.EFFICIENT;
return ExecutionMode.LIVE;
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- DigiSV @ Rick.Brown on Apr 7, 2017 11:14 AM
  Mark Correct
  Correct Answer
  Thanks Rick. Did you mean in router step replace default entries import com.itko.lisa.vse.ExecutionMode;
  return ExecutionMode.EFFICIENT; to the one you mentioned above? Also please let me know if I need to import any class
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  - Prem_Bairoliya @ DigiSV on Apr 7, 2017 3:52 PM
    Mark Correct
    Correct Answer
    You will need to keep the following line & replace the rest with the code mentioned by Rick.Brown
    import com.itko.lisa.vse.ExecutionMode;
    Like • Show 0 Likes0
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    - DigiSV @ Prem_Bairoliya on Apr 8, 2017 7:53 PM
      Mark Correct
      Correct Answer
      Prem_Bairoliya and Rick.Brown..version I am using is 7.5.2. when above code is run in "DYNAMIC" mode I am getting step error | Message: An error occurred resolving dynamic execution mode to a concrete mode, however have not seen this error when I run in "LIVE" mode.
      Like • Show 0 Likes0
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      - Rick.Brown @ DigiSV on Apr 10, 2017 10:43 AM
        Mark Correct
        Correct Answer
        Please post the contents of your router step. My pseudo-code isn't syntax-checked, so I'm sure it needs modification.
        Doing a quick visual syntax check (I added brackets to the "if" line), I think your Router step should read like this:
        
        import com.itko.lisa.vse.ExecutionMode;
        requestMessage = lisa_vse_request.getBodyText();
        Postman_Token="3d793263-8b53-c2d4-157a-b978252eaefa";
        if(requestMessage.contains(Postman_Token)) return ExecutionMode.EFFICIENT;
        return ExecutionMode.LIVE;
        
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        DigiSV @ Rick.Brown on Apr 10, 2017 11:11 AM
        Mark Correct
        Correct Answer
        Hi Rick, below is the code..
        
        import com.itko.lisa.vse.ExecutionMode;
        requestMessage = lisa_vse_request.getBodyText();
        URLPARAM0="77741900528607";
        if (requestMessage.contains(URLPARAM0)) return ExecutionMode.EFFICIENT;
        return ExecutionMode.LIVE;
        
        ============================================================================
        | LISA Exception:
        ============================================================================
        | Step: Virtual Service Execution Router
        ----------------------------------------------------------------------------
        | Message: An error occurred resolving dynamic execution mode to a concrete mode.
        ----------------------------------------------------------------------------
        | Trapped Exception: Sourced file: inline evaluation of: ``// This script must return either an enum entry from ExecutionMode or // a stri . . . ''
        | Trapped Message: Sourced file: inline evaluation of: ``// This script must return either an enum entry from ExecutionMode or // a stri . . . '' : at Line: 8 : in file: inline evaluation of: ``// This script must return either an enum entry from ExecutionMode or // a stri . . . '' : requestMessage .contains ( URLPARAM0 )
        Target exception: java.lang.NullPointerException: Null Pointer in Method Invocation
        Like • Show 0 Likes0
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        Joel NeSmith @ DigiSV on Apr 10, 2017 12:39 PM
        Mark Correct
        Correct Answer
        Add quote marks ( " ) around URLPARAM0 on line 8. You need to send a string to the .contains method.
        if (requestMessage.contains( "URLPARAM0" ) )
        Like • Show 0 Likes0
        Actions
        Rick.Brown @ Joel NeSmith on Apr 10, 2017 12:57 PM
        Unmark Correct
        Correct Answer
        That will search the request for the string "URLPARAM0", rather than searching for the string "77741900528607".
        
        I see the same error only when I set my responseBody to null, which leads me to think that the body is blank, and the request message is just a GET.
        
        If this is the case, it's the whole request message we want, instead of lisa_vse_request.getBodyText().
        
        Change the line:
        requestMessage = lisa_vse_request.getBodyText();
        to:
        requestMessage = lisa_vse_request.toString();
        This brings back the entire request, including your URL arguments, rather than just the request body, and should allow the "contains" to work as expected.
        Like • Show 0 Likes0
        Actions
        Joel NeSmith @ Rick.Brown on Apr 10, 2017 1:11 PM
        Mark Correct
        Correct Answer
        Yep, sorry 'bout that. Brain spasm. I was thinking parameter list contains key not the string requestMessage.
        Like • Show 0 Likes0
        Actions
        Rick.Brown @ Joel NeSmith on Apr 10, 2017 1:24 PM
        Mark Correct
        Correct Answer
        A less of a sledgehammer way would be to use a getAttributes parameter list, so you're right, but it would mean some extra lines of scripting, and would need to be aware if the attribute had been moved to an argument (all too much work for me )
        Like • Show 0 Likes0
        Actions
DigiSV Apr 10, 2017 1:53 PM
Mark Correct
Correct Answer
Thanks Rick.Brown J_NeSmith ..working now .
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Extract data and value from REST

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