Module: Deltacloud::Helpers::Application

Defined in:
lib/deltacloud/helpers/deltacloud_helper.rb

Defined Under Namespace

Modules: SinatraHelper

Constant Summary collapse

NEW_BLOB_FORM_ID = 
'new_blob_form_d15cfd90'
HTML_ESCAPE = 
{ '&' => '&amp;',  '>' => '&gt;',   '<' => '&lt;', '"' => '&quot;' }

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(klass) ⇒ Object 



343
344
345
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 343

def Application.included(klass)
  klass.extend SinatraHelper
end

Instance Method Details

#action_method(action, collection) ⇒ Object 



63
64
65
66
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 63

def action_method(action, collection)
  http_method = collection.operation(action).http_method
  http_method || Deltacloud::Rabbit::BaseCollection.http_method_for(action)
end

#additional_features_for?(collection_name, apart_from = []) ⇒ Boolean

Returns:

  • (Boolean) 


319
320
321
322
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 319

def additional_features_for?(collection_name, apart_from = [])
  features_arr = (driver.class.features[collection_name.to_sym] || [] )  - apart_from
  not features_arr.empty?
end

#auth_feature_name ⇒ Object 



54
55
56
57
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 54

def auth_feature_name
  return 'key' if driver.class.has_feature?(:instances, :authentication_key)
  return 'password' if driver.class.has_feature?(:instances, :authentication_password)
end

#bt(trace) ⇒ Object 



353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 353

def bt(trace)
  return [] unless trace
  return trace.join("\n") if params['fulltrace']
  app_path = File::expand_path("../../..", __FILE__)
  dots = false
  trace = trace.map { |t| t.match(%r{^#{app_path}(.*)$}) ? "$app#{$1}" : "..." }.select do |t|
    if t == "..."
      keep = ! dots
      dots = true
    else
      keep = true
      dots = false
    end
    keep
  end
  "[\nAbbreviated trace\n   pass fulltrace=1 as query param to see everything\n  $app = #{app_path}\n]\n" + trace.join("\n")
end

#cdata(text = nil, &block) ⇒ Object 



182
183
184
185
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 182

def cdata(text = nil, &block)
  text ||= capture_haml(&block)
  "<![CDATA[#{text.strip}]]>"
end

#collections_to_json(collections) ⇒ Object 



25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 25

def collections_to_json(collections)
  r = {
    :version => settings.version,
    :driver => driver_symbol,
    :provider => Thread.current[:provider] || ENV['API_PROVIDER'],
    :links => collections.map { |c|
      {
        :rel => c.collection_name,
        :href => self.send(:"#{c.collection_name}_url"),
        :features => c.features.select { |f| driver.class.has_feature?(c.collection_name, f.name) }.map { |f|
          f.operations.map { |o|
            { :name => f.name, :rel => o.name, :params => o.params_array, :constraints => constraints_hash_for(c.collection_name, f.name) }
          }
        }
      }
    }
  }
  r[:provider] ||= 'default'
  JSON::dump(:api => r)
end

#constraints_hash_for(collection_name, feature_name) ⇒ Object 



46
47
48
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 46

def constraints_hash_for(collection_name, feature_name)
  driver.class.constraints(:collection => collection_name, :feature => feature_name).inject({}) { |r, v| r[v[0]]=v[1];r }
end

#current_provider ⇒ Object 



21
22
23
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 21

def current_provider
  Thread.current[:provider] || ENV['API_PROVIDER'] || 'default'
end

#driver_provider(d) ⇒ Object

Reverse the entrypoints hash for a driver from drivers.yaml; note that d is a hash, not an actual driver object



222
223
224
225
226
227
228
229
230
231
232
233
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 222

def driver_provider(d)
  result = {}
  if d[:entrypoints]
    d[:entrypoints].each do |kind, details|
      details.each do |prov, url|
        result[prov] ||= {}
        result[prov][kind] = url
      end
    end
  end
  result
end

#filter_all(model) ⇒ Object 



68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 68

def filter_all(model)
  begin
    @benchmark = Benchmark.measure { @elements = driver.send(model.to_sym, credentials, params) }
  rescue => e
    @exception = e
  end
  if @elements
    headers['X-Backend-Runtime'] = @benchmark.real.to_s
    instance_variable_set(:"@#{model}", @elements)
    respond_to do |format|
      format.html { haml :"#{model}/index" }
      format.xml { haml :"#{model}/index" }
      format.json { JSON::dump({ model => @elements.map { |el| el.to_hash(self) }}) }
    end
  else
    report_error(@exception.respond_to?(:code) ? @exception.code : nil)
  end
end

#format_hardware_property(prop) ⇒ Object 



284
285
286
287
288
289
290
291
292
293
294
295
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 284

def format_hardware_property(prop)
  return "&empty;" unless prop
  u = hardware_property_unit(prop)
  case prop.kind
  when :range
    "#{prop.first} #{u} - #{prop.last} #{u} (default: #{prop.default} #{u})"
  when :enum
    prop.values.collect{ |v| "#{v} #{u}"}.join(', ') + " (default: #{prop.default} #{u})"
  else
    "#{prop.value} #{u}"
  end
end

#format_instance_profile(ip) ⇒ Object 



297
298
299
300
301
302
303
304
305
306
307
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 297

def format_instance_profile(ip)
  o = ip.overrides.collect do |p, v|
    u = hardware_property_unit(p)
    "#{p} = #{v} #{u}"
  end
  if o.empty?
    nil
  else
    "with #{o.join(", ")}"
  end
end

#h(s) ⇒ Object 



349
350
351
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 349

def h(s)
  s.to_s.gsub(/[&"><]/n) { |special| HTML_ESCAPE[special] }
end

#header(title, opts = {}, &block) ⇒ Object 



235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 235

def header(title, opts={}, &block)
  opts[:theme] ||= 'b'
  opts[:back] ||= 'true'
  capture_haml do
    haml_tag :div, :'data-role' => :header, :'data-theme' => opts[:theme], :'data-add-back-btn' => opts[:back] do
      haml_tag :a, :'data-rel' => :back do
        haml_concat "Back"
      end if opts[:back] == 'true'
      haml_tag :h1 do
        haml_concat title
      end
      block.call if block_given?
    end
  end
end

#image_for_state(state) ⇒ Object 



214
215
216
217
218
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 214

def image_for_state(state)
  capture_haml do
    haml_tag :img, :src => "/images/#{state}" % state.downcase, :title => state
  end
end

#instance_action(name) ⇒ Object 



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
171
172
173
174
175
176
177
178
179
180
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 146

def instance_action(name)
  unless original_instance = driver.instance(credentials, :id => params[:id])
    return report_error(403)
  end

  # If original instance doesn't include called action
  # return with 405 error (Method is not Allowed)
  unless driver.instance_actions_for(original_instance.state).include?(name.to_sym)
    return report_error(405)
  end

  @benchmark = Benchmark.measure do
    @instance = driver.send(:"#{name}_instance", credentials, params[:id])
  end

  headers['X-Backend-Runtime'] = @benchmark.real.to_s

  if name == :destroy
    response = respond_to do |format|
      format.html { redirect(instances_url) }
    end
    halt 204, response
  end

  unless @instance.class == Instance
    redirect instance_url(params[:id])
  else
    response = respond_to do |format|
      format.xml { haml :"instances/show" }
      format.html { haml :"instances/show" }
      format.json { JSON::dump(@instance.to_hash(self)) }
    end
    halt 202, response
  end
end

#instance_action_method(action) ⇒ Object 



59
60
61
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 59

def instance_action_method(action)
  action_method(action, Deltacloud::Rabbit::InstancesCollection)
end

#link_to_action(action, url, method) ⇒ Object 



191
192
193
194
195
196
197
198
199
200
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 191

def link_to_action(action, url, method)
  capture_haml do
    haml_tag :form, :method => :post, :action => url, :class => [:link, method], :'data-ajax' => 'false' do
      haml_tag :input, :type => :hidden, :name => '_method', :value => method
      haml_tag :button, :type => :submit, :'data-ajax' => 'false', :'data-inline' => "true" do
        haml_concat action
      end
    end
  end
end

#link_to_format(format) ⇒ Object 



202
203
204
205
206
207
208
209
210
211
212
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 202

def link_to_format(format)
  return unless request.env['REQUEST_URI']
  uri = request.env['REQUEST_URI']
  return if uri.include?('format=')
  uri += uri.include?('?') ? "&format=#{format}" : "?format=#{format}"
  capture_haml do
    haml_tag :a, :href => uri, :'data-ajax' => 'false', :'data-icon' => 'grid' do
      haml_concat format.to_s.upcase
    end
  end
end

#log ⇒ Object

Log errors to the same logger as we use for logging requests



105
106
107
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 105

def log
  Deltacloud::Exceptions.logger(Deltacloud.default_frontend.logger)
end

#new_blob_form_url(bucket) ⇒ Object 



280
281
282
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 280

def new_blob_form_url(bucket)
  bucket_url(@bucket.name) + "/" + NEW_BLOB_FORM_ID
end

#order_hardware_profiles(profiles) ⇒ Object 



309
310
311
312
313
314
315
316
317
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 309

def order_hardware_profiles(profiles)
  #have to deal with opaque hardware profiles
  uncomparables = profiles.select{|x| x.cpu.nil? or x.memory.nil? }
  if uncomparables.empty?
    profiles.sort_by{|a| [a.cpu.default, a.memory.default] }
  else
    (profiles - uncomparables).sort_by{|a| [a.cpu.default, a.memory.default] } + uncomparables
  end
end

#render_cdata(text) ⇒ Object 



187
188
189
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 187

def render_cdata(text)
  "<![CDATA[#{text.strip}]]>" unless text.nil?
end

#report_error(code = nil, message = nil) ⇒ Object 



109
110
111
112
113
114
115
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
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 109

def report_error(code=nil, message=nil)

  if !code.nil?
    @error = Deltacloud::Exceptions.exception_from_status(code, message || translate_error_code(code)[:message])
    @code = code
    message = @error.message
  else
    @error = request.env['sinatra.error'] || @exception
    @code = @error.respond_to?(:code) ? @error.code : 500
    message = @error.respond_to?(:message) ? @error.message : translate_error_code(code)[:message]
  end

  response.status = @code

  backtrace = (@error.respond_to?(:backtrace) and !@error.backtrace.nil?) ?
    "\n\n#{@error.backtrace[0..20].join("\n")}\n\n" : ''

  if @code.to_s =~ /5(\d+)/
    log.error(@code.to_s) { "[#{@error.class.to_s}] #{message}#{backtrace}" }
  end

  respond_to do |format|
    format.xml {  haml :"errors/common", :layout => false }
    format.json { JSON::dump({ :code => @code || @error.code, :message => message, :error => @error.class.name }) }
    format.html {
      begin
        haml :"errors/common", :layout => :error
      rescue RuntimeError
        # If the HTML representation of error is missing, then try to report
        # it through XML
        @media_type=:xml
        haml :"errors/common", :layout => false
      end
    }
  end
end

#request_headers ⇒ Object 



50
51
52
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 50

def request_headers
  env.inject({}){|acc, (k,v)| acc[$1.downcase] = v if k =~ /^http_(.*)/i; acc}
end

#show(model) ⇒ Object 



87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 87

def show(model)
  @benchmark = Benchmark.measure do
    @element = driver.send(model, credentials, { :id => params[:id]} )
  end
  headers['X-Backend-Runtime'] = @benchmark.real.to_s
  instance_variable_set("@#{model}", @element)
  if @element
    respond_to do |format|
      format.html { haml :"#{model.to_s.pluralize}/show" }
      format.xml { haml :"#{model.to_s.pluralize}/show" }
      format.json { JSON::dump(model => @element.to_hash(self)) }
    end
  else
    report_error(404)
  end
end

#subheader(title, opts = {}) ⇒ Object 



251
252
253
254
255
256
257
258
259
260
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 251

def subheader(title, opts={})
  opts[:theme] ||= 'a'
  capture_haml do
    haml_tag :div, :'data-role' => :header, :'data-theme' => opts[:theme] do
      haml_tag :p, :class => 'inner-right' do
        haml_concat title
      end
    end
  end
end

#translate_error_code(code) ⇒ Object 



262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
 
# File 'lib/deltacloud/helpers/deltacloud_helper.rb', line 262

def translate_error_code(code)
  case code
  when 400; { :message => "Bad Request" }
  when 401; { :message => "Unauthorized" }
  when 403; { :message => "Forbidden" }
  when 404; { :message => "Not Found" }
  when 405; { :message => "Method Not Allowed" }
  when 406; { :message => "Not Acceptable" }
  when 409; { :message => "Resource Conflict" }
  when 500; { :message => "Internal Server Error" }
  when 502; { :message => "Backend Server Error" }
  when 504; { :message => "Gateway Timeout" }
  when 501; { :message => "Not Supported" }
  end
end