Is it possible to have two quota policies attached to one proxy?

Google Cloud Apigee
1

I have a proxy “X”,if the incoming API request has header=“abc” i need to execute quota policy “Quota A” or else “Quota B” for the proxy.I cannot have multiple products .I need to do it one proxy and one product . @Anil Sagar

1 Like
2

Yes. You can attach one or more quota policies in an API proxy and conditionally execute them.

3

Here’s how I would do it.

<Flow name='example flow'>
  <Description>demonstrate Conditional Quota</Description>
  <Condition>(request.verb = "POST") and (proxy.pathsuffix = "/example")</Condition>

  <Request>
    <Step>
      <Name>Quota-1</Name>
      <Condition>request.header.HEADERNAME = "abc"</Condition>
    </Step>
    <Step>
      <Name>Quota-2</Name>
      <Condition>NOT (request.header.HEADERNAME = "abc")</Condition>
    </Step>

  </Request>
  ....

And then of course configure your Quota policies the way you like.

4

Thanks @Dino that worked good.Now I have the javascript, which parses the actual response and adds quota values to the response. How can i know which Quota policy has been excecuted and which was skipped in the flow? Is there a way to do that?

5

Well I suppose you could cheat and chdeck request.header.HEADERNAME in the Javascript. But that means embedding that check twice - once in the Condition and once in the JS code. A better way might be to check from within JS the values for variables like

ratelimit.{policy_name}.available.count
ratelimit.{policy_name}.allowed.count
ratelimit.{policy_name}.used.count

…for each of {Quota-1, Quota-2} to determine which one has fired. If you see a variables for

ratelimit.Quota-1.used.count

..then you know Quota-1 has fired.

But you must already be doing this if you are embedding quota values into the response. Right?

6

yes ,i used a quota value to check if it null, problem was solved.

Now i want to capture response headers which have values { “count”:11,“call”:122}.Then an if condition to check count value and generate a custom message basing on the condition.I tried to use extract variables policy to extract headers from the response ,but i am not able to see them in the trace file.

page.value and page.app should contain header value right?

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ExtractVariables async="false" continueOnError="false" enabled="true" name="Extract-page-headers">
    <DisplayName>Extract page headers</DisplayName>
    <Source>response</Source>
    <Header name="X-Page-Usage">
        <Pattern ignoreCase="false">{value}</Pattern>
    </Header>
    <Header name="X-App-Usage ">
        <Pattern ignoreCase="false">{app}</Pattern>
    </Header>
    <IgnoreUnresolvedVariables>true</IgnoreUnresolvedVariables>
    <Source clearPayload="false">response</Source>
    <VariablePrefix>page</VariablePrefix>
</ExtractVariables>
7

Hi, I think this is a new question and I think you ought to use the Ask a Question button to ask a new question. We’ll answer, I promise.

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