Module: HttpSimulator

Defined in:
lib/http_sim.rb

Constant Summary collapse

@@pid = 
false
@@erb_files = 
{
  index: self.read_file('lib/index.html.erb'),
  request: self.read_file('lib/request.html.erb'),
  response: self.read_file('lib/response.html.erb')
}
@@endpoints = 
[]

Class Method Summary collapse

Class Method Details

.check_if_port_in_use(port) ⇒ Object 



103
104
105
106
107
108
109
110
 
# File 'lib/http_sim.rb', line 103

def self.check_if_port_in_use(port)
  begin
    HTTParty.get("http://localhost:#{port}/")
    raise "Port #{port} already in use"
  rescue Errno::ECONNREFUSED
    # ignored
  end
end

.read_file(path) ⇒ Object 



29
30
31
32
33
34
35
36
37
 
# File 'lib/http_sim.rb', line 29

def self.read_file(path)
  lines = []
  File.open(path, 'r') do |f|
    f.each_line do |line|
      lines.push line
    end
  end
  lines.join
end

.register_endpoint(method, path, default_response) ⇒ Object 



116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
 
# File 'lib/http_sim.rb', line 116

def self.register_endpoint(method, path, default_response)
  raise '/ is a reserved path' if path == '/'

  endpoint = Endpoint.new(method, path, default_response)
  @@endpoints.push endpoint

  case endpoint.method
    when 'GET'
      Sinatra::Base.get endpoint.path do
        endpoint.add_request request.body.read
        endpoint.default_response
      end
    when 'PUT'
      Sinatra::Base.put endpoint.path do
        endpoint.add_request request.body.read
        endpoint.default_response
      end
    when 'PATCH'
      Sinatra::Base.patch endpoint.path do
        endpoint.add_request request.body.read
        endpoint.default_response
      end
    when 'POST'
      Sinatra::Base.post endpoint.path do
        endpoint.add_request request.body.read
        endpoint.default_response
      end
    when 'DELETE'
      Sinatra::Base.delete endpoint.path do
        endpoint.add_request request.body.read
        endpoint.default_response
      end
  end

  Sinatra::Base.get "#{endpoint.path}/response" do
    ERB.new(@@erb_files[:response]).result binding
  end

  Sinatra::Base.put "#{endpoint.path}/response" do
    endpoint.response = request.body.read
  end

  Sinatra::Base.delete "#{endpoint.path}/response" do
    endpoint.response = endpoint.default_response
  end

  Sinatra::Base.get "#{endpoint.path}/requests" do
    @endpoint = endpoint
    ERB.new(@@erb_files[:request]).result binding
  end

  Sinatra::Base.delete "#{endpoint.path}/requests" do
    endpoint.requests = []
  end
end

.reset_endpoints ⇒ Object 



112
113
114
 
# File 'lib/http_sim.rb', line 112

def self.reset_endpoints
  @@endpoints = []
end

.run!(port: 4567) ⇒ Object 



46
47
48
49
50
51
52
53
54
55
56
57
58
 
# File 'lib/http_sim.rb', line 46

def self.run!(port: 4567)
  check_if_port_in_use(port)

  Sinatra::Base.get '/' do
    ERB.new(@@erb_files[:index]).result binding
  end

  Class.new(Sinatra::Base) {
    set :port, port

    include HttpSimulator
  }.run!
end

.run_daemon!(port: 4567, max_wait_seconds: 5) ⇒ Object 



60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
 
# File 'lib/http_sim.rb', line 60

def self.run_daemon!(port: 4567, max_wait_seconds: 5)
  check_if_port_in_use(port)

  Sinatra::Base.get '/' do
    ERB.new(@@erb_files[:index]).result binding
  end

  @@pid = Process.fork do
    Class.new(Sinatra::Base) {
      set :port, port

      include HttpSimulator
    }.run!
  end

  wait_for_start(port, max_wait_seconds)

  at_exit do
    Process.kill 'SIGKILL', @@pid
  end

  @@pid
end

.stop_daemon! ⇒ Object 



84
85
86
 
# File 'lib/http_sim.rb', line 84

def self.stop_daemon!
  Process.kill('SIGKILL', @@pid) if @@pid
end

.wait_for_start(port, max_wait_seconds) ⇒ Object 



88
89
90
91
92
93
94
95
96
97
98
99
100
101
 
# File 'lib/http_sim.rb', line 88

def self.wait_for_start(port, max_wait_seconds)
  wait_count = 0
  while wait_count < max_wait_seconds * 4
    begin
      HTTParty.get("http://localhost:#{port}/")
      return
    rescue Errno::ECONNREFUSED
      wait_count += 1
      sleep 0.25
    end
  end

  raise "Simulators failed to start - timed out after #{max_wait_seconds} seconds!"
end