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# Captcha
This is a Elixir lib for generating captcha. No dependencies. It drawing captcha image with C code. No ImageMagick, No RMagick.
C code come from: [https://github.com/huacnlee/rucaptcha](https://github.com/huacnlee/rucaptcha)
<img src="https://cloud.githubusercontent.com/assets/5518/22151425/e02390c8-df58-11e6-974d-5eb9b1a4e577.gif" width="150px" /> <img src="https://cloud.githubusercontent.com/assets/5518/22151427/e4939d92-df58-11e6-9754-4a46a86acea8.gif" width="150px" /> <img src="https://cloud.githubusercontent.com/assets/5518/22151431/e494576e-df58-11e6-9845-a5590904c175.gif" width="150px" /> <img src="https://cloud.githubusercontent.com/assets/5518/22151432/e495066e-df58-11e6-92b8-38b40b73aba0.gif" width="150px" /> <img src="https://cloud.githubusercontent.com/assets/5518/22151428/e49404ee-df58-11e6-8e2d-8b17b33a3710.gif" width="150px" /> <img src="https://cloud.githubusercontent.com/assets/5518/22151430/e4942406-df58-11e6-9ff8-6e2325304b41.gif" width="150px" /> <img src="https://cloud.githubusercontent.com/assets/5518/22151429/e4941ae2-df58-11e6-8107-757296573b2f.gif" width="150px" /> <img src="https://cloud.githubusercontent.com/assets/5518/22151433/e4c7c89c-df58-11e6-9853-1ffbb4986962.gif" width="150px" /> <img src="https://cloud.githubusercontent.com/assets/5518/22151435/e4c97ea8-df58-11e6-8959-b4c78716271d.gif" width="150px" /> <img src="https://cloud.githubusercontent.com/assets/5518/22151436/e4cc09f2-df58-11e6-965c-673333b33c0d.gif" width="150px" /> <img src="https://cloud.githubusercontent.com/assets/5518/22151434/e4c87788-df58-11e6-9490-c255aaafce71.gif" width="150px" /> <img src="https://cloud.githubusercontent.com/assets/5518/22151445/ee35ff66-df58-11e6-8660-a3673ef3f5ee.gif" width="150px" /> <img src="https://cloud.githubusercontent.com/assets/5518/22151446/ee67b074-df58-11e6-9b95-7d53eec21c33.gif" width="150px" />
## Installation
If [available in Hex](https://hex.pm/docs/publish), the package can be installed as:
1. Add `captcha` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[{:captcha, "~> 0.1.0"}]
end
```
2. Ensure `captcha` is started before your application:
```elixir
def application do
[applications: [:captcha]]
end
```
## Usage
```elixir
# allow customize receive timeout, default: 10_000
case Captcha.get() do
{:ok, text, img_binary } ->
# save text in session, then send img to client
{:timeout} ->
# log some error
end
```

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