A Grape API mounted on Rack.
$ bundle install
$ rackup
Loading NewRelic in developer mode ...
Puma starting in single mode...
* Puma version: 6.4.0 (ruby 2.7.7-p221) ("The Eagle of Durango")
* Min threads: 0
* Max threads: 5
* Environment: development
* PID: 82944
* Listening on http://127.0.0.1:9292
* Listening on http://[::1]:9292
rake routes
Explore the API using Swagger UI. Run the application and navigate to http://locahost:9292/swagger/index.html.
A hello world example that returns a JSON document.
$ curl http://localhost:9292/api/ping
{"ping":"pong"}
A simple POST and PUT example.
curl -XPOST -d '' http://localhost:9292/api/ring
{"rang":7}
curl -XPUT -d '{"count":2}' -H "Content-Type:application/json" http://localhost:9292/api/ring
{"rang":9}
An example that shows a POST of JSON data.
$ curl -XPOST http://localhost:9292/api/spline -d '{"reticulated":"lots"}' -H "Content-Type:application/json"
{"reticulated":"lots"}
An example that pre-processes params sent as JSON data.
$ curl http://localhost:9292/api/reticulated_splines?splines=[{"id":1,"reticulated":true},{"id":2,"reticulated":false}]
[{"id":1,"reticulated":false},{"id":2,"reticulated":true}]
An example of rescue_from that wraps all exceptions in an HTTP error code 500.
$ curl -i http://localhost:9292/api/raise
HTTP/1.1 500 Internal Server Error
Last-Modified: Wed, 15 Jun 2022 01:12:37 GMT
Content-Type: text/html
Content-Length: 234
Vary: Origin
Server: WEBrick/1.4.2 (Ruby/2.6.5/2019-10-01)
Date: Sat, 18 Jun 2022 01:51:25 GMT
Connection: Keep-Alive
<html>
<head>
<title>Unexpected Error</title>
</head>
<body>
<h1>Ouch...</h1>
<a href="http://rack.rubyforge.org/">
<img src="/images/rack-logo.png">
</a>
<p>
Something went terribly wrong.
</p>
</body>
</html>
An example that uses path-based versioning.
$ curl http://localhost:9292/api/vendor
{"path":"acme"}
An example that uses vendor header-based versioning.
$ curl -H "Accept:application/vnd.acme-v1+json" http://localhost:9292/api
{"header":"acme"}
A middleware that wraps all responses and always returns HTTP code 200.
$ curl http://localhost:9292/api/decorated/ping
{"body":{"ping":"pong"},"status":200}
An example that overrides the default Content-Type or returns data in both JSON and XML formats.
$ curl http://localhost:9292/api/plain_text
A red brown fox jumped over the road.
$ curl http://localhost:9292/api/mixed
{"data":"A red brown fox jumped over the road."}
$ curl http://localhost:9292/api/mixed.xml
<?xml version="1.0" encoding="UTF-8"?>
<hash>
<data>A red brown fox jumped over the road.</data>
</hash>
An example that demonstrates a file upload and download.
$ curl -X POST -i -F image_file=@spec/fixtures/grape_logo.png http://localhost:9292/api/avatar
{"filename":"grape_logo.png","size":4272}
$ curl -X POST -i -F file=@spec/fixtures/grape_logo.png http://localhost:9292/api/download.png
HTTP/1.1 201 Created
Content-Type: image/png
Content-Disposition: attachment; filename*=UTF-8''grape_logo.png
Vary: Origin
Content-Length: 4272
Server: WEBrick/1.4.2 (Ruby/2.6.5/2019-10-01)
Date: Sat, 18 Jun 2022 02:12:21 GMT
Connection: Keep-Alive
$ curl -X POST -i -F file=@api/ping.rb http://localhost:9292/api/download.rb
HTTP/1.1 201 Created
Content-Type: application/x-ruby
Content-Disposition: attachment; filename*=UTF-8''ping.rb
Vary: Origin
Content-Length: 115
Server: WEBrick/1.4.2 (Ruby/2.6.5/2019-10-01)
Date: Sat, 18 Jun 2022 02:12:47 GMT
Connection: Keep-Alive
module Acme
class Ping < Grape::API
format :json
get '/ping' do
{ ping: 'pong' }
end
end
end
An example of using grape-entity.
$ curl http://localhost:9292/api/entities/1
{"tool":{"id":"1","length":10,"weight":"20kg"}}
Demonstrates header case-sensitive handling.
$ curl http://localhost:9292/api/headers/Host
{"Host":"localhost:9292"}
An example of streaming data.
curl http://localhost:9292/api/stream --no-buffer
1
2
3
...
The application is setup with NewRelic w/ Developer Mode. Navigate to http://localhost:9292/newrelic after making some API calls.