mechanize.cr/README.md
2021-06-02 14:36:52 +09:00

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# mechanize.cr
This project is inspired by Ruby's [mechanize](https://github.com/sparklemotion/mechanize).
The purpose is to cover all the features of original one.
## Installation
1. Add the dependency to your `shard.yml`:
```yaml
dependencies:
mechanize:
github: Kanezoh/mechanize.cr
```
2. Run `shards install`
## Usage
### simple GET request
```crystal
require "mechanize"
agent = Mechanize.new
page = agent.get("http://example.com/")
puts page.code # => 200
puts page.body # => html
puts page.title # => Example Domain
```
### POST request
You can also send post request with data.
```crystal
require "mechanize"
agent = Mechanize.new
query = {"foo" => "foo_value", "bar" => "bar_value"}
page = agent.post("http://example.com/", query: query)
# => request body is foo=foo_value&bar=bar_value
```
### search node
You can use css selector to search html nodes by using `#css` method.
This method is from [myhtml](https://github.com/sparklemotion/mechanize),so if you want to explore more, please refer the repository.
```crystal
puts page.css("h1").first.inner_text
```
### add query params, request_headers
You can add any query parameters and headers to requests.
```crystal
require "mechanize"
agent = Mechanize.new
agent.request_headers = HTTP::Headers{"Foo" => "Bar"}
params = {"hoge" => "hoge"}
page = agent.get("http://example.com/", params: params)
# The actual URL is http://example.com/?hoge=hoge
```
### fill and submit form
You can fill and submit form by using `field_with` and `submit`. It enables you to scrape web pages requiring login.
```crystal
require "mechanize"
agent = Mechanize.new
page = agent.get("#{web page contains login form}")
form = page.forms[0]
form.field_with("email").value = "tester@example.com"
form.field_with("password").value = "xxxxxx"
agent.submit(form)
agent.get("#{web page only logged-users can see}"
```
## Contributing
1. Fork it (<https://github.com/your-github-user/mechanize/fork>)
2. Create your feature branch (`git checkout -b my-new-feature`)
3. Commit your changes (`git commit -am 'Add some feature'`)
4. Push to the branch (`git push origin my-new-feature`)
5. Create a new Pull Request
## Contributors
- [Kanezoh](https://github.com/your-github-user) - creator and maintainer