campsi

campsi/api

Manage and expose document-oriented content through a configurable RESTful API.

• Create schemas with campsi/architect.
• Talk to the API with campsi/admin.

Features

API

• Store and manage both collections or individual documents
• Describe complex data structures, using campsi components
• State-based document lifecycle for approval workflows
• POST, PUT and DELETE asynchronous webhooks for distributed architecture
• Truly Stateless
• Patch updates
• Conflicts resolver

Querying

• Embed related documents ?embed=shippingAddresses
• Complex filtering ?data.name=Thomas&data.address.city=London
• Complex sorting ?sort=name,-birthday
• Pagination ?page=4&perPage=20
• Stored searches

Authentication & authorization

• Role-Based Access-Control
• Generate invitation tokens by role
• PassportJS integration
• Custom authentification providers
  • Local Database
  • Facebook
  • Github
  • Google
• Rate limiter

Other

• Swagger / API doc generation
• Generate random mock data

Assets Management

• Stream based upload system
• Filtered and paginated GET route
• Custom storage adapters
  • Local storage with rotating subfolders
  • Amazon S3
  • Azure Blob Storage
  • Google Cloud Platform
• GraphicsMagick Metadata recognition
• Resize and convert media derivatives

Concepts

States & role permissions

States represent the different stages in a document lifecycle, like published, draft and archived. To each state is associated specific role-based permissions, defining allowed HTTP methods :

Method	Possible actions on the state
GET	view and query the documents
POST	create a new document
PUT	edit an existing document or put a document in this state
DELETE	delete the state for the document

A document can be in different states at the same time, for example:

1. the published version, visible on the website and the mobile app by everyone
2. the waiting_for_approval version that has to be validated by an admin
3. the new draft version an editor is already working on.

A document can migrate from a state to another, for example:

• You create a resource ticket for your customers error reporting.
• customer role is allowed to POST /docs/tickets in the default state submitted
• support role is allowed to PUT /docs/tickets in the states replied or read

You can create any number of states:

• published
• draft
• waiting_for_approval
• approved
• rejected
• populationA
• populationB
• submitted
• read
• replied
• …

You can create any number of roles:

• admin
• editor
• manager
• customer
• user
• public
• visitor
• …

Resource

The resource is the document template, it describes the fields and validation rules.

Document

A document is an instance of a resource. It has an id and a value for each defined state, which is encapsulated in a property named data.

Anatomy of a document

let doc = {
	id: new ObjectId("58205e4fa5dc6c3b381a0e9b"),
    states: {
    	published: {
        	createdAt: "2016-11-07 10:58:23.950Z",
            createdBy: "58277c406d6157a751399052",
            data: {
            	title: "Hello World",
                content: "I'm the published version"
            }
        },
    	draft: {
        	createdAt: "2016-11-07 11:22:12.950Z",
            createdBy: "58277c406d6157a751399052",
            data: {
            	title: "Hello World",
                content: "I'm the draft version"
            }
        },
    }
}

Relationships & document embedding

Relationships between resources are resolved:

• automatically, if the relationship has the property embed set to true
• on demand, if a embed={rel} parameter is passed in the query string

Because there are no JOIN in MongoDB, embedding documents requires the execution of supplementary queries. For performance reason, the results are memoized during the request lifetime.

Webhook

You can configure webhooks that are triggered when an request processed by campsi/api match a specific scope (action, state, resource). Once triggered, the webhook send an asynchronous HTTP request to the endpoint uri specified in its configuration.

todo distributed architecture example

Usage

First, start Redis and MongoDB containers by running:

docker compose up -d

To stop the containers, run:

docker compose down

To restart the containers, run:

docker compose restart

Once the containers are running, you can start the server by running:

npm run test

Flags

--schema     "path/to/the/schema.json"  # specifies the json schema to use
--port       3000                       # set the HTTP port to listen to
--data       "/mnt/nfs/data"            # repository for upload

campsi/schema specification

Root

Property	Type	Description
name	String	unique identifier of your api
title	String	title of the API
description	String	markdown description
roles	<Role>	roles hashmap
types	<ResourceType>	resource types hashmap
resources	<Resource>	resources hasmap

Role

Property	Type	Description
label	String	unique identifier of your api
auth	Boolean	title of the API
admin	Boolean	markdown descripition

ResourceType

Property	Type	Description
defaultState	String	name of the state any request will default to
states	<State>	hashmap of the states
permissions	<Role, <State, Method>>	Allowed HTTP methods by role and by state

State

Property	type	Description
name	String	name of the state any request will default to
label	String	hashmap of the states
validate	Boolean	wether the data has to be valid to be saved or not

Resource

Property	type	Description
title	String	readable title
description	String	markdown description
type	String	name of the ResourceType
fields	[Object]	list of the fields composing the model
hooks	[Hook]	list of hooks bound to the resource
rels	<Rel>	hashmap of relationships

Rel

Property	type	Description
path	String	property path
resource	String	name of the resource it points to (self reference is OK)
embed	Boolean	resolve relation automatically
fields	[String]	list of the fields that gets embedded

Hook

Property	type	Description
name	String	hook identifier
uri	String	todo support parameter
method	String	one of POST GET PUT DELETE
payload	Boolean	if true and method is POST or PUT, send the data
on	[String]	list of actions
states	[String]	list of states
retry	Number	number of time the HTTP client tries to reach the endpoint
timeout	Number	number of seconds before the HTTP client hangs up
headers	<String,String>	hashmap of the request headers

Requirements

• NodeJS v16.0.0
• MongoDB v2.6.0
• Optional
  • ImageMagick
  • Graphics Magick