JS rewriting target endpoint for Target Server

Google Cloud Apigee
1

I confused on how it works. So creating a new post to get it resolved.

See I have defined a Target Server and calling it in Target Endpoint HTTP Target Connection.

Now I want to re-write the target with Javascript.

//context.setVariable("target.copy.pathsuffix", false);
var name =context.getVariable("name");
if(name !== null ){
  var targeturl = context.getVariable("target.url");
  context.setVariable("target.url", targeturl+"/siddharth1/sandbox/volvos/"+name);
}

Using the above code I can re-write the target if I hardcode the targe url in Http target connections.

How can I re-write target by Java Script if I use Target Servers?

What I know is, for Target servers, the following variables are available in the ‘Target Response’ flow,

target.host,target.ip,request.path.

1 Like
2

@Barahalikar Siddharth

You mean the changing the target server dynamically in API flow in run time ? You mean you have defined target server like below,

<TargetEndpoint name="default">
  <HTTPTargetConnection>
    <LoadBalancer>
      <Server name="target1" />
    </LoadBalancer>
    <Path>/test</Path>
  </HTTPTargetConnection>
</TargetEndpoint>

And , Would you like to change the target server name to something like “target2” in the API Proxy ?

I am afraid , As far as i know, it’s not allowed. Since you can actually define more than one target server inside load balancer & changing one target server in API Proxy flow doesn’t make any sense since multiple servers will be used for load balancing.

3

Yes, @Anil Sagar I have defined it in that way.

If target1 is api.user.com

I want to append url to target 1 through js as, target1+“/name” === api.user.com/name.

Is this not possible through Service callout/kvm/ any other?

4

Very Interesting Use Case @Barahalikar Siddharth ,

I can see a way to implement same ,

  • Define an API Proxy with target server config like below,
    <HTTPTargetConnection>
        <LoadBalancer>
            <Server name="target1"/>
            <Server name="target2"/>
        </LoadBalancer>
        <Path>/{request.queryparam.dynamicPath}</Path>
    </HTTPTargetConnection>

Basically, use any flow variable to update target basePath like above. Keep us posted.

3 Likes
5

In proxyendpoint define like below

(proxy.pathsuffix MatchesPath “/Test”)

BinayaTest

Then Go to the Target Endpoints name BinayaTest

BinayaTest is my traget server where you can define the URL.

/v1/availability

Then call the below java script code

context.setVariable(“target.copy.pathsuffix”, false); preflow of the Tragetendpoint BinayaTest

Try This

6

This solution worked flawlessly for me.

7

Hi,

I am trying to append variable {env} in the middle of the Target URL.
For example,

https://myManager.svc.{env}.myValue/accounts/{accounts_id}

It is working fine in the ServiceCallout policy but when I tried to use in Target - default.xml, it is not working.
I don’t want to use the JavaScript and RouteRule options.

If any one know about - how to append or concat variable (Example here - {env}) in the Target URL really very help ful.

8

Hi @Rajeev Chaturvedi , AFAIK we cant do that in TargetEndpont default.xml.

You need to use a JS policy on Targetendpoint preflow to set the target.url

var env = context.getVariable(xyz);
var accounts_id = ap235xyz;
var targetURL = 'https://myManager.svc.' + env + '.myValue/accounts/' + accounts_id;
context.setVariable("target.url",targetURL);<br>

BTW this is a very old post, please create a new post with, issue & requirement.

9

Is it possible to override port number during runtime? @Anil Sagar @ Google