delete_rollbar_items.rb

require 'uri'
require 'net/http'
require 'openssl'

def get_occurrences_of_an_item read_token, item_id
  url = URI("https://api.rollbar.com/api/1/item/#{item_id}/instances")

  http = Net::HTTP.new(url.host, url.port)
  http.use_ssl = true

  request = Net::HTTP::Get.new(url)
  request["accept"] = 'application/json; charset=utf-8'
  request["X-Rollbar-Access-Token"] = read_token

  response = http.request(request)
  items = JSON.parse(response.read_body)
  items["result"]["instances"] || []
end

def delete_occurrences_of_an_item read_token, write_token, item_id
  instances = get_occurrences_of_an_item(read_token, item_id)

  instances.each do |inst|
    url = URI("https://api.rollbar.com/api/1/instance/#{inst["id"]}")

    http = Net::HTTP.new(url.host, url.port)
    http.use_ssl = true

    request = Net::HTTP::Delete.new(url)
    request["accept"] = 'application/json; charset=utf-8'
    request["X-Rollbar-Access-Token"] = write_token

    response = http.request(request)
  end

  delete_occurrences_of_an_item(read_token, item_id) if instances.length > 0
end

def delete_items read_token, write_token, prefix_error
  url = URI("https://api.rollbar.com/api/1/items?level=error")

  http = Net::HTTP.new(url.host, url.port)
  http.use_ssl = true

  request = Net::HTTP::Get.new(url)
  request["accept"] = 'application/json'
  request["X-Rollbar-Access-Token"] = read_token

  response = http.request(request)
  body = JSON.parse(response.read_body)
  items = body["result"]["items"] || []

  items.each do |item|
    need_delete = item["title"].start_with?(prefix_error)
    puts "---#{item['title']}--#{item['id']}--#{need_delete}"
    next unless need_delete
    puts "--deleting--"
    

    delete_occurrences_of_an_item(read_token, write_token, item["id"])
  end
end

# Usage
# read & write token are get from Rollbar project setting page
# delete_items "1", "1", "NoMethodError: undefined method"