ERROR - An appropriate check for a message body was not found on the enclosing Step or Flow. (PO001)

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1

I am getting Po001 error in CodeLint when I am trying to apply a JSON-threat-protection policy.

in proxy.xml

<Step>  <Name>basic-json-threat-protection</Name>  <Condition>(request.header.Content-Length != 0)</Condition></Step>

among policies

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<JSONThreatProtection continueOnError="true"  enabled="true" name="basic-json-threat-protection">
   <DisplayName>Basic JSON Threat Protection</DisplayName>
   <ArrayElementCount>1200</ArrayElementCount>
   <ContainerDepth>10</ContainerDepth>
   <ObjectEntryCount>100</ObjectEntryCount>
   <ObjectEntryNameLength>40</ObjectEntryNameLength>
   <StringValueLength>1200</StringValueLength>
</JSONThreatProtection>
2 
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><JSONThreatProtection async="false" continueOnError="false" enabled="true" name="JTP-contentValidation">
    <DisplayName>JTP-contentValidation</DisplayName>
    <Properties/>
    <ArrayElementCount>0</ArrayElementCount>
    <ContainerDepth>1</ContainerDepth>
    <ObjectEntryCount>13</ObjectEntryCount>
    <Source>request</Source>
    <StringValueLength>50</StringValueLength>
</JSONThreatProtection>
3

screen-shot-2019-04-18-at-13639-pm.png I am also facing the same error. see as above xml and attached for error log

4

Do you have a sample proxy? What is the payload you are sending?

Above information doesn’t have better exception details..

5

Hello Vinay, Since this is error occurs during the code analysis done via CodeLint, I don’t think this has anything to do with how the payload looks like at least that’s what I think.

6

Hi. You need condition added to your JSON Threat protection related step which will check if your policy source (in your case “request”) is valid (not empty, …).

1 Like
7

Ok, so how do you do that?

Update: I Figured it out:


<Step>
<Name>JSON-Threat-Protection</Name>
<Condition>(request.content != null)</Condition>
</Step>
1 Like