README.md

Bruno (Postman Alternative) - Share a variable across requests

2023/11/11 - Coenraad Stijne

Summary

Bruno describes itself as:

Bruno is a Fast and Git-Friendly Opensource API client, aimed at revolutionizing the status quo represented by Postman, Insomnia and similar tools out there.

Reuse a variable across requests:

For example, let's create a request which fetches the newest stories from Hacker News.

GetNewestStories Request

By running a Post Response script, we can set a variable which is available to all requests in the same collection:

Post Response Script:

bru.setVar('hn-newest-story-id', res.body[0]);

Output:

hn-newest-story-id == 38226217

GetByID Request

By using {{hn-newest-story-id}} in the URL, it gets automatically substituted with our variable content: 38226217.

If we want to assert our variable has been set correctly, the following could be added to GetById => Script => Pre Request:

if (!bru.getVar('hn-newest-story-id'))
    throw "hn-newest-story-id is not defined. Run GetNewestStories request first."

---

GetNewestStories.bru

meta {
  name: GetNewestStories
  type: http
  seq: 1
}

get {
  url: https://hacker-news.firebaseio.com/v0/newstories.json?print=pretty
  body: none
  auth: none
}

query {
  print: pretty
}

script:post-response {
  bru.setVar('hn-newest-story-id', res.body[0]);
}

GetById.bru

meta {
  name: GetById
  type: http
  seq: 2
}

get {
  url: https://hacker-news.firebaseio.com/v0/item/{{hn-newest-story-id}}.json?print=pretty
  body: none
  auth: none
}

query {
  print: pretty
}

script:pre-request {
  if (!bru.getVar('hn-newest-story-id'))
      throw "hn-newest-story-id is not defined. Run GetNewestStories request first."
}