motion-http

A cross-platform HTTP Client for RubyMotion that's quick and easy to use.

Supported platforms:

• iOS, macOS, tvOS, watchOS
• Android

It makes use of the officially supported networking libraries provided by Apple and Google. The goal of this gem is to provide you with a stable alternative to using these libraries directly, using a syntax that is much easier to use.

Please report any bugs or suggestions for improvement!

Installation

Add this line to your application's Gemfile:

gem 'motion-http'

And then execute:

$ bundle
$ rake gradle:install # Android only

iOS Specific Configuration

If you will be making insecure requests (not using HTTPS), you will need to explicitly allow insecure HTTP requests by adding this line to your app's configuration (in your Rakefile). You might want to do this if you are trying to access localhost in development.

app.development do
  app.info_plist['NSAppTransportSecurity'] = { 'NSAllowsArbitraryLoads' => true }
end

Usage

Using motion-http is quick and easy. You can either make one-off requests or create a reusable API client for further customization.

Basic Usage

The basic syntax for a request looks like this:

HTTP.method(url, options) do |response|
  # this will be called asynchronously
end

Where method can be either get, post, put, patch, delete, head, options, or trace.

For example, to make a simple GET request:

HTTP.get("http://www.example.com") do |response|
  if response.success?
    puts "Success!"
  else
    puts "Oops! Something went wrong."
  end
end

If you need to specify query params:

HTTP.get("http://www.example.com/search", params: { term: "my search term" }) do |response|
  # ...
end

The response object contains the status code, headers, body, and shortcut methods for checking the response status:

HTTP.get("http://example.com") do |response|
  puts response.status_code.to_s
  puts response.headers.inspect
  puts response.body
  response.success?      # 2xx status
  response.redirect?     # 3xx status
  response.client_error? # 4xx status
  response.server_error? # 5xx status
end

If the response body has a JSON content type it will automatically be parsed when requesting the response.object:

HTTP.get("http://api.example.com/people.json") do |response|
  if response.success?
    response.object["people"].each do |person|
      puts "name: #{person["name"]}"
    end
  else
    puts "Error: #{response.object["errors"]}"
  end
end

Use the follow_redirects option to specify whether or not to follow redirects. The default is true:

HTTP.get("http://example.com/redirect", follow_redirects: false) do |response|
  # ...
end

POST Requests

When making a POST request, specifying the request body is easy:

HTTP.post("http://www.example.com/endpoint", body: raw_request_body) do |response|
  # ...
end

Specify the :form option and it will automatically be encoded as application/x-www-form-urlencoded request body:

HTTP.post("http://www.example.com/login", form: { user: 'andrew', password: 'secret'}) do |response|
  if response.success?
    puts "Authenticated!"
  elsif response.client_error?
    puts "Bad username or password"
  else
    puts "Oops! Something went wrong."
  end
end

Tp specify a multipart request, pass an array of parts as the :multipart option:

HTTP.post("http://www.example.com/upload",
  multipart: ['plain text', { filename: 'upload.jpg', data: ns_data_object }) do |response|
  # ...
end

Likewise, to send a JSON encoded request body, use the :json option:

HTTP.post("http://www.example.com/widgets", json: { widget: { name: "Foobar" } }) do |response|
  if response.success?
    puts "Widget created!"
  elsif response.status_code == 422
    puts "Oops, you did something wrong: #{response.object["error_message"]}"
  else
    puts "Oops! Something went wrong."
  end
end

To specify request specific headers, use the :headers option. This overrides any previously set headers. In this example, we override the default JSON content type:

HTTP.post("http://www.example.com/widgets",
    headers: { 'Content-Type' => 'application/vnd.api+json' },
    json: { widget: { name: "Foobar" } }
  ) do |response|
  # ...
end

All other HTTP method requests work the same way:

HTTP.put(url, options) { ... }
HTTP.patch(url, options) { ... }
HTTP.delete(url, options) { ... }
HTTP.head(url, options) { ... }
HTTP.options(url, options) { ... }
HTTP.trace(url, options) { ... }

Advanced Usage

A common use case is to create a reusable HTTP client that uses a common base URL or request headers.

client = HTTP::Client.new("http://api.example.com")
# Set or replace a single header:
client.header "X-API-TOKEN", "abc123xyz"
client.header["X-API-TOKEN"] = "abc123xyz"

# To set or replace multiple headers:
client.headers "X-API-TOKEN" => "abc123xyz",
               "Accept" => "application/json"

# Note that it is valid for some headers to appear multiple times (Accept, Vary, etc).
# To append multiple headers of the same key:
client.add_header "Accept", "application/json"
client.headers.add "Accept", "application/json"

Then you can make your requests relative to the base URL that you specified when creating your client.

client.get("/people") do |response|
  # ...
end

Basic Auth / Token Auth

To make Basic Auth requests, either set the credentials before the request, or set it on your client:

HTTP.basic_auth('username', 'password').get('https://example.com/protected')
# or
client.basic_auth('username', 'password')
client.get('/protected')

The auth method is another shortcut for setting any value of the Authorization header:

HTTP.auth("Token token=#{my_token}")
# or
client.auth("Token token=#{my_token}")
# same as
client.headers['Authorization'] = "Token token=#{my_token}"

Logging

Logging is disabled by default. To enable logging:

HTTP.logger.enable!

To disable it again:

HTTP.logger.disable!

Contributing

1. Fork it
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 new Pull Request

License

Copyright 2018-2019 Andrew Havens

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Parts of the source are under the following license:

Copyright (c) 2015-2016, HipByte (info@hipbyte.com) and contributors. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.