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Currency scraper for the Dominican Republic

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## Currency scraper for the Dominican Republic

This is a simple service that provides the current currency exchange rate for 
the Dominican Republic. To do so, we parse the web pages of all the major banks 
of the Dominican Republic, those pages are updated on a daily basis by every 
bank.

The method used by this application to calculate the mean of the data is the 
_Harmonic mean_.

This application is freely available as a service thanks to 
_Marcos Organizador de Negocios S.R.L_ here http://api.marcos.do

or

you may make a pull request as well, if you see something that needs to be fixed 
or better implemented.

## Install

```shell
$ bundle install
```

Please note that, this service not longer needs `imagemagik`, `ogcr` or `ocrad`.

This application uses port 8080 by default, one may change the port passing it as 
the first parameter:

```shell
$ ruby curry.rb 1025
```

## Known bugs

There's a bug in older versions of Ruby that causes this application to hang for 
an indefinite period of time. Please use Ruby 2.2 +

# Available actions

## ``GET /requests``

Returns the total number of requests successefully served up to this moment.

sample response:

1092 requests.

## ``GET /rnc/:rnc``

Returns information about the RNC specified by `:rnc`. [JSON serialized]

sample response:

```json
{
  "rnc": "131098193",
  "name": "MARCOS ORGANIZADOR DE NEGOCIOS SRL",
  "comercial_name": "MARCOS ORGANIZADOR DE NEGOCIOS",
  "category": "",
  "payment_regimen": "NORMAL",
  "status": "ACTIVO"
}
```

## ``GET /ncf/:rnc/:ncf``

Returns true or false, depending if the RNC and the NCF specified by :rnc and 
``:ncf`` respectively belongs to the entity associated to ``:rnc``

sample response:

```json
{
  "valid": true
}
```

## ``GET /rates``

Returns the exchange rate for euros and dollars from all major banks of the 
Dominican Republic. [JSON serialized]

```json
{
  "bpd": {
    "euro": {
      "buying_rate": "48.15",
      "selling_rate": "51.90"
    },
    "dollar": {
      "buying_rate": "45.05",
      "selling_rate": "45.56"
    },
    "source": "https://www.popularenlinea.com/_api/web/lists/getbytitle('Rates')/items"
  },
  "blh": {
    "euro": {
      "buying_rate": "48.00",
      "selling_rate": "51.00"
    },
    "dollar": {
      "buying_rate": "45.20",
      "selling_rate": "45.56"
    },
    "source": "http://www.blh.com.do/Inicio.aspx"
  },
  
  ...
  
  "euro_mean": {
    "buying_rate": "48.12",
    "selling_rate": "51.68"
  },
  "dollar_mean": {
    "buying_rate": "45.16",
    "selling_rate": "45.56"
  }
}
```

## ``GET /central_bank_rates``

Returns the exchange rate for the dollar according to the Central Bank of the 
Dominican Republic. [JSON serialized]

sample response:

```json
{
  "dollar": {
    "buying_rate": "45.76",
    "selling_rate": "45.81"
  }
}
```

## License
MIT License

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