https://github.com/cloud8421/dragonfly-server

Elixir app to serve Dragonfly images
https://github.com/cloud8421/dragonfly-server

Last synced: about 1 month ago
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Elixir app to serve Dragonfly images

• Host: GitHub
• URL: https://github.com/cloud8421/dragonfly-server
• Owner: cloud8421
• Archived: true
• Created: 2014-10-21T13:42:58.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2015-08-07T07:00:54.000Z (over 9 years ago)
• Last Synced: 2024-08-02T02:11:15.905Z (4 months ago)
• Language: Elixir
• Size: 904 KB
• Stars: 41
• Watchers: 3
• Forks: 5
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Dragonfly server

[![Build Status](https://travis-ci.org/cloud8421/dragonfly-server.svg?branch=master)](https://travis-ci.org/cloud8421/dragonfly-server)

This application can be used to serve Dragonfly urls.

# Limitations

- Doesn't support the full Dragonfly feature set (for now).

- Limited to Imagemagick.

# Setup

## Dependencies

#### Erlang

**IMPORTANT**: Due to a known bug in Erlang 17.3, fetching urls with an `https` scheme are not processed correctly and throw an exception.

Please use Erlang >= 17.4, available at .

#### Elixir

To install elixir on a Mac, `brew install elixir` (you may need to `brew update` first).

Alternatively, you can follow [these instructions](http://elixir-lang.org/install.html).

#### Imagemagick

To install Imagemagick with png support, run `brew install jpeg libpng imagemagick`.

#### Goon

Communication with Imagemagick is managed by [Goon](https://github.com/alco/goon), a middleman needed to polyfill the incomplete Port

implementation provided by Erlang (see [here](https://github.com/alco/porcelain/wiki/Implementation#the-middleman) for more information).

Download the binary and add it to a directory available in your `$PATH`.

## App setup

    $ mix deps.get

This will install all needed packages.

Then, copy the example environment file and make the necessary adjustments.

    $ cp .env.example .env

## Run the app in development

    $ iex -S mix

Starts the app and opens a console.

## Run tests

    $ mix test

## General api

Images are served at the entry point defined in `config.exs`, set as default at `/media/:payload/:filename`.

Note that both params in the url scheme are needed by the application.

## Admin api

The app exposes an admin api that can be used to programmatically expire an image and all its associated resources.

Endpoints are:

- GET image (shows steps necessary to generate image)

- DELETE image (expires all caches involved in the generation of the image)

Given an image url in the form of:

    http://example.com/media/12345/untitled.jpg

It can be deleted by sending a `DELETE` request to the following endpoint:

    http://example.com/admin/media/12345/untitled.jpg

From the command line:

    $ curl -XDELETE http://example.com/admin/media/12345/untitled.jpg

The expected response is a `202`, which indicates that the cache expiry has been scheduled and will be performed asyncronously.

The steps necessary to generate the image can also be examined at:

    http://example.com/admin/media/12345/untitled.jpg

From the command line:

    $ curl http://example.com/admin/media/12345

## Deploy on Heroku

The app runs only on Cedar-14 and requires the multi-buildpack as it uses a custom Elixir buildback (it includes Goon).

Buildpacks are defined in `.buildpacks`.

Please follow instructions at .