req_crawl

# ReqCrawl

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Req plugins to support common crawling functions

Right now this only consists of the `ReqCrawl.Robots` plugin to parse `robots.txt` files

## Installation

```elixir
def deps do
  [
    {:req_crawl, "~> 0.1.0"}
  ]
end
```

## Plugins

### ReqCrawl.Robots

A Req plugin to parse robots.txt files

You can attach this plugin to any `%Req.Request` you use for a crawler and it will only run against
URLs with a path of `/robots.txt`.

It outputs a map with the following fields:
  
* `:errors` - A list of any errors encountered during parsing
* `:sitemaps` - A list of the sitemaps
* `:rules` - A map of the rules with User-Agents as the keys and a map with the following values as the fields:
  * `:allow` - A list of allowed paths
  * `:disallow` - A list of the disallowed paths

#### Options

* `:robots_output_target` - Where to store the parsed output. Defaults to
  * `:body` - Overwrites the existing body.
  * `:header` - Stores in the response headers under the `:robots` key