Class: Resat::Filter

Inherits:
Object
  • Object
show all
Includes:
Kwalify::Util::HashLike
Defined in:
lib/filter.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#failures ⇒ Object

Returns the value of attribute failures.



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# File 'lib/filter.rb', line 12

def failures
  @failures
end

Instance Method Details

#extract ⇒ Object

Extract elements from response



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# File 'lib/filter.rb', line 72

def extract
  @extractors.each do |ex|
    @variables.substitute!(ex.field)
    if @request.has_response_field?(ex.field, @target)
      field = @request.get_response_field(ex.field, @target)
      if ex.pattern
        @variables.substitute!(ex.pattern)
        Regexp.new(ex.pattern).match(field)
        if Regexp.last_match
          @variables[ex.variable] = Regexp.last_match(1)
        else
          Log.warn("Extraction from response #{@target} field '#{ex.field}' ('#{field}') with pattern '#{ex.pattern}' failed.")
        end
      else
        @variables[ex.variable] = field
      end
      @variables.mark_for_save(ex.variable) if ex.save
      @variables.export(ex.variable) if ex.export
    else
      Log.warn("Extraction from response #{@target} field '#{ex.field}' failed: field not found.")
    end
  end if @extractors
end

#prepare(variables) ⇒ Object 



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# File 'lib/filter.rb', line 14

def prepare(variables)
  @is_empty ||= false
  @failures = []
  @variables = variables
  Log.info("Running filter '#{@name}'")
end

#run(request) ⇒ Object

Run filter on given response



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# File 'lib/filter.rb', line 22

def run(request)
  @request = request
  @response = request.response
  validate
  extract
end

#validate ⇒ Object

Validate response



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# File 'lib/filter.rb', line 30

def validate
  unless @response
    @failures << "No response to validate."
    return
  end
  
  # 1. Check emptyness
  if @target == 'header'
    if @is_empty != (@response.size == 0)
      @failures << "Response header #{'not ' if @is_empty}empty."
    end
  else
    if @is_empty != (@response.body.nil? || @response.body.size <= 1)
      @failures << "Response body #{'not ' if @is_empty}empty."
    end
  end
  
  # 2. Check required fields
  @required_fields.each do |field|
    unless @request.has_response_field?(field, target)
      @failures << "Missing #{target} field '#{field}'."
    end
  end if @required_fields
  
  # 3. Evaluate validators
  @validators.each do |v|
    if @request.has_response_field?(v.field, @target)
      field = @request.get_response_field(v.field, @target)
      is_ok = v.is_empty && field.empty?
      is_ok ||= v.pattern && v.pattern.empty? && field.empty?
      if v.pattern && !v.pattern.empty?
        @variables.substitute!(v.pattern)
        is_ok ||= Regexp.new(v.pattern).match(field)
      end
      @failures << "Validator /#{v.pattern} failed on '#{field}' from #{@target} field '#{v.field}'." unless is_ok
    else
      @failures << "Missing #{@target} field '#{v.field}'."
    end
  end if @validators
end