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cloudspark edited this page Jul 18, 2014 · 113 revisions

Getting Started

Bipio is a lightweight RESTful JSON API ontop of ExpressJS. It's an API orchestration platform, REST/RPC and ephemeral endpoint server. Please see the Installation section of the readme to get a basic server running. If you'd like to take a look at some of the things BipIO can do, browse the cookbook in the sidebar or sign up to bipio explore what's been shared by the community.

Don't worry, you'll soon be on your way to creating useful graphs!

Contents

Useful why?

There are many reasons to use an ephemeral graph system, here's some highlights

  • message delivery implementations are trivial to refactor as vertices can be swapped in-place dynamically. Changes to client code is highly unlikely.

  • vertices in the graphs have no other system concerns but the 'one thing they do well', given knowledge of immediately adjacent edges they have everything they need to scale horizontally and vertically.

  • graph structures are a natural fit for a pipe and filter pattern, as they can visually describe messsage pathways and model potentially complex workflows.

  • once a Bip expires or is otherwised removed, replays are impossible. On expiry, Bips disappear forever, this means temporal endpoints cannot be discovered or interrogated. for example : /bip/http/abc123 may do abc, or 123, or xyz, and it may or may not exist. Similarly nothing about the endpoint needs to have a name with any semantic value. The underlying delivery strategy for a single endpoint may be constantly changing.

So how does it work?

When you define a bip, you are defining the characteristics of a named graph. SMTP and HTTP bip payloads are normalized for each respective protocol, and trigger content is normalized from the channel that is invoked. SMTP/HTTP bips are 'on-demand' and they fire whenever a new message is received. Triggers are fired whenever the periodic scheduler requests it.

When a message is received or generated from a trigger, it enters the target bip's graph via the 'source' vertex/channel. Any exports are then normalized and sent across adjacent edges to the next-nearest vertex via RabbitMQ for consumption as a new import. The source message may be transformed in certain ways depending on your transform rules, and will continue to feed forward from 'source' until all vertices have been visited.

As a message is pushed through a graph, it builds a stack of imports from prior visited channels which can be further transformed and imported. See the bips section for more info.

A note on files

Received or fetched files are not present as explicit imports/exports but rather appear to a hub when made available. Certain channels will operate with the assumption that these files are present (eg: dropbox.save_file)

API

The API is namespaced as RESTful resources, and RPC's with /rest and /rpc respectively. JSONP is supported with a callback=your_function GET parameter.

Endpoints

If you're running a self-installed instance, endpoints will be namespaced into your config file's domain_public setting, for example :

http://localhost:5000 for modifying system REST and RPC resources https://{username}.localhost:5000 for transacting with your own HTTP Bips and Channel Renderers

For https://bip.io hosted users, bipio has 2 endpoints that you'll likely be using.

https://api.bip.io for modifying system REST and RPC resources https://{username}.bip.io for transacting with your own HTTP Bips and Channel Renderers

Authentication

The API uses HTTP Basic Authentication. Username will be your account username, and password is a generated API token.

curl http://admin:[email protected]:5000/rest/bip/637658bb-eb15-4d59-9e0e-abb39021e40e

When you set up BipIO for the first time, take note of the generated token for your primary account. If a token has been misplaced, run tools/token_regen.js {account uuid} to regenerate a token for the target account uuid.

You can expose an account UUID by shelling into mongodb and running the appropriate query against the accounts collection.

Response Codes

HTTP Status Codes

400 Error responses will generally be raised due to validation errors in the request payload. Errors are returned within the context of the resource being requested, with the message body of the form errors.{attribute}.message

REST

REST Resources honor GET/POST/PUT/DELETE/PATCH.

Decorators

Most REST resources also have additional response decorators attached to each model which provides a little extra info. Decorators are prefixed with an underscore and are read-only. eg: _href : "https://docs.bip.io/rest/bip/bc928113-0a98-4975-a821-98373aa72552"

The two most common are

  • _href (URI) Fully Qualified Resource URI
  • _repr (String) Derived representation.

Collections

If id has been omitted, GET will return a list of objects. Lists accept page, page_size, order_by GET parameters. The response models are keyed into data.

GET /rest/domain?page=1&page_size=10&order_by=recent

{
  "page": 1,
  "page_size": 10,
  "num_pages": 1,
  "order_by": "recent",
  "total": 2,
  "data": [
    {
      "id": "664616d3-5caf-ab09-b398-000012b5e920",
      "name": "docuser.bip.io",
      "_repr": "docuser.bip.io",
      "_href": "https://api.bip.io/rest/domain/664616d3-5caf-ab09-b398-000012b5e920"
    },
    {
      "id": "61bea7bc-37dd-3368-9b36-00006fa6319e",
      "name": "mydomain.com",
      "_repr": "mydomain.com",
      "_href": "https://api.bip.io/rest/domain/61bea7bc-37dd-3368-9b36-00006fa6319e"
    }
  ]
}

RPC

RPC's provide certain behaviors and helpers for performing work, negotiating authentication or generating content.

Config

Configuration files can be found under /config/{environment}.json where environment is the shell export NODE_ENV. If NODE_ENV can not be found as an environment variable, development will be used.

The first time you setup bipio via make install, it will ask you some questions which populate into the config json file. The template for this file is config.json-dist

Variables

  • domain_public (string) public facing default domain (fqdn), including port # if applicable
  • website_public (string) proxying website (user space oauth confirm for example)
  • cdn_public (string) default public assets URI
  • proto_public (string) public protocol for resolving HTTP bip endpoints, http or https
  • crons (object) periodic scheduler Cron Expressions
    • stat (string) global stats runner
    • trigger (string) trigger runner
    • expire (string) bip expirer
  • timezone (string) Timezone (eg: GMT, Asia/Tokyo etc)
  • server (object) Server Config
    • port (integer) TCP Listen Port
    • host (string, optional) IP Address. Omit to listen on all interfaces
    • sessionSecret (string) autogenerated session secret
    • forks (integer) #forks. When empty, uses 1 fork/CPU.
    • public_interfaces (array, optional) list of resolvable IP's (V4|V6) for internal domain resolution. omit to autodiscover.
  • mailer (object) Outbound Mailer Config
    • port (string) Relay Port
    • host (string) Relay host or IP
    • auth (object, optional) SMTP Authentication Credentials
      • username Username
      • password Password
  • dbMongo (object) MongoDB Connect
  • data_dir (string) file based data repo, relative to installation path
  • cdn (string) file based cdn data (pointed to via cdn_public), relative to installation path
  • k (object) AES Keychain, for encrypting private user space data by version.
    • # (string) version # = key, eg: "5": "d767500f84eecec0d8944db8bb4a549f"
  • pods (object) Pod Config. Sparse Config populated via tools/pod-install.js see Pods for more info.
  • rabbit (object) RabbitMQ Server + Queue Configs
    • host (string) RabbitMQ Host (FQDN)
    • vhost (string, optional) Virtual Host, including prefix slash, eg: /bipio_production
    • auth (object) RabbitMQ Client Authentication
      • username (string) Username
      • password (string) Password
    • exchanges (object) System Queue definitions

Hosted User Notes

A Note on SMTP Bip Endpoints

Bipio is not an SMTP Relay, Smart Host or 'Email Service' but rather an API provider that supports an SMTP transport. We do not suggest binding your custom domain MX to Bipio unless it is a dedicated subdomain. Set your subdomain CNAME/MX as {username}.bip.io. For more info, see the domains section.

Rate Limiting

Your account and API access will be subject to a rate limiting policy. Should you experience HTTP 502 responses and feel this is in error, please reach us at [email protected]

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