Postman PreRequests and Tests

1 minute read

Description:

So in Postman, you can use pre-request scripts to have Postman run scripts before the connection and tests to run after the connection. This works really well with a software like, for example Netiq Identity Governance. That particular software requires an Oauth token before the connection and afterwards to revoke the token.

To Resolve:

  1. First create an environment:
    • Set var: ``
    • Set var: ``
  2. Set pre-request script:

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    const echoPostRequest = {
       url: 'https://server.domain.com:8443/osp/a/idm/auth/oauth2/token',
       method: 'POST',
       header: {
          'Accept': 'application/json',
          'Content-Type': 'application/x-www-form-urlencoded'
       },
       body: {
          mode: 'urlencoded',
          urlencoded: [
             { key: "grant_type", value: "password" },
             { key: "username", value: "myUser" },
             { key: "password", value: "pa55word" },
             { key: "client_id", value: "mySuperLongClientID" },
             { key: "client_secret", value: "mySuperLongClientSecret" }
          ]
       }
    };
    
    pm.sendRequest(echoPostRequest, function (err, response) {
       console.log(response.json());
       var responseJson = response.json();
       pm.environment.set('currentAccessToken', responseJson.access_token)
       pm.environment.set('currentRefreshToken', responseJson.refresh_token)
    });
    
  3. Set tests:

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    const echoPostRequest = {
       url: 'https://server.domain.com:8443/osp/a/idm/auth/oauth2/revoke',
       method: 'POST',
       header: {
          'Accept': 'application/json',
          'Content-Type': 'application/x-www-form-urlencoded'
       },
       body: {
          mode: 'urlencoded',
          urlencoded: [
             { key: "token", value: pm.environment.get("currentRefreshToken") },
             { key: "client_id", value: "mySuperLongClientID" },
             { key: "client_secret", value: "mySuperLongClientSecret" }
          ]
       }
    };
    
    pm.sendRequest(echoPostRequest, function (err, response) {
       try {
       console.log(response.json());
       jsonData = JSON.parse(responseBody);
       } catch (err) {
          pm.environment.set('currentRefreshToken', "blank")
          console.log(err); // This must be logging the error on console
          console.log("If error is No data, empty input at 1:1^, that is okay")
       }
    });
    
  4. Lastly, inside the connection just set Authorization tab to:
    • type: Bearer Token
    • Value: ``

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