Class: NOMS::Command::Application

Inherits:
Base
  • Object
show all
Defined in:
lib/noms/command/application.rb

Instance Attribute Summary collapse

Attributes inherited from Base

#logger

Instance Method Summary collapse

Methods inherited from Base

#default_logger

Constructor Details

#initialize(origin, argv, attrs = {}) ⇒ Application 



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# File 'lib/noms/command/application.rb', line 25

def initialize(origin, argv, attrs={})
    @document = nil
    @origin = NOMS::Command::URInion.parse(origin)
    if @origin.scheme == 'file' and @origin.host.nil?
        @origin.host = 'localhost'
    end
    @argv = argv
    @options = { }
    @type = nil

    @log = attrs[:logger] || default_logger

    @window = NOMS::Command::Window.new($0, @origin, :logger => @log)

    @log.debug "Application #{argv[0]} has origin: #{origin}"
    @useragent = NOMS::Command::UserAgent.new(@origin, :logger => @log,
                                              :specified_identities => (attrs[:specified_identities] || []),
                                              :cache => (attrs.has_key?(:cache) ? attrs[:cache] : true),
                                              :plaintext_identity => (attrs.has_key?(:plaintext_identity) ?
                                                  attrs[:plaintext_identity] : false))
end

Instance Attribute Details

#body ⇒ Object

Should user-agent actually be here?



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# File 'lib/noms/command/application.rb', line 21

def body
  @body
end

#document ⇒ Object

Should user-agent actually be here?



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# File 'lib/noms/command/application.rb', line 21

def document
  @document
end

#options ⇒ Object

Should user-agent actually be here?



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# File 'lib/noms/command/application.rb', line 21

def options
  @options
end

#type ⇒ Object

Should user-agent actually be here?



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# File 'lib/noms/command/application.rb', line 21

def type
  @type
end

#useragent ⇒ Object

Should user-agent actually be here?



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# File 'lib/noms/command/application.rb', line 21

def useragent
  @useragent
end

#window ⇒ Object

Should user-agent actually be here?



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# File 'lib/noms/command/application.rb', line 21

def window
  @window
end

Instance Method Details

#_sanitize(thing) ⇒ Object

Get rid of V8 stuff



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# File 'lib/noms/command/application.rb', line 195

def _sanitize(thing)
    if thing.kind_of? V8::Array or thing.respond_to? :to_ary
        thing.map do |item|
            _sanitize item
        end
    elsif thing.respond_to? :keys
        Hash[
             thing.keys.map do |key|
                 [key, _sanitize(thing[key])]
             end]
    else
        thing
    end
end

#abbrev(s, limit = 10) ⇒ Object 



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# File 'lib/noms/command/application.rb', line 166

def abbrev(s, limit=10)
    if s.length > (limit - 3)
        s[0 .. (limit - 3)] + '...'
    else
        s
    end
end

#display ⇒ Object 



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# File 'lib/noms/command/application.rb', line 174

def display
    case @type
    when 'noms-v2'
        body = _sanitize(@document.body)
        NOMS::Command::Formatter.new(body, :logger => @log).render
    when 'noms-raw'
        @body.to_yaml
    when /^text(\/|$)/
        @body
    else
        if @window.isatty
            # Should this be here?
            @log.warn "Unknown data of type '#{@type}' not sent to terminal"
            []
        else
            @body
        end
    end
end

#exitcode ⇒ Object 



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# File 'lib/noms/command/application.rb', line 94

def exitcode
    @document ? @document.exitcode : 0
end

#fetch! ⇒ Object 



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# File 'lib/noms/command/application.rb', line 47

def fetch!
    # Get content and build object, set @type
    case @origin.scheme
    when 'file'
        @type = (MIME::Types.of(@origin.path).first || MIME::Types['text/plain'].first).content_type
        @body = File.open(@origin.path, 'r') { |fh| fh.read }
    when 'data'
        @type = @origin.mime_type
        raise NOMS::Command::Error.new("data URLs must contain application/json") unless @type == 'application/json'
        @body = @origin.data
    when /^http/
        response, landing_url = @useragent.get(@origin)
        new_url = landing_url
        @origin = new_url
        @useragent.origin = new_url
        @window.origin = new_url
        if response.success?
            # Unlike typical ReST data sources, this
            # should very rarely fail unless there is
            # a legitimate communication issue.
            @type = response.content_type || 'text/plain'
            @body = response.body
        else
            raise NOMS::Command::Error.new("Failed to request #{@origin}: #{response.statusText}")
        end
    else
        raise NOMS::Command::Error.new("noms command #{@argv[0].inspect} not found: not a URL or bookmark")
    end

    case @type
    when /^(application|text)\/(x-|)json/
        begin
            @body = JSON.parse(@body)
        rescue JSON::ParserError => e
            raise NOMS::Command::Error.new("JSON error in #{@origin}: #{e.message}")
        end
        if @body.respond_to? :has_key? and @body.has_key? '$doctype'
            @type = @body['$doctype']
            @document = NOMS::Command::Document.new @body
            @document.argv = @argv
            @document.exitcode = 0
        else
            @type = 'noms-raw'
        end
    end
end

#render! ⇒ Object 



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# File 'lib/noms/command/application.rb', line 98

def render!
    if @document and @document.script
        # Crashes when using @window as global object
        @v8 = V8::Context.new
        # Set up same-origin context and stuff--need
        # Ruby objects to do XHR and limit local I/O
        @window.document = @document
        @v8[:window] = @window
        @v8[:document] = @document
        @v8.eval 'var alert = function (s) { window.alert(s); };'
        @v8.eval 'var prompt = function (s, echo) { window.prompt(s, echo); };'
        @v8.eval 'var location = window.location;'
        @v8.eval 'var console = window.console;'
        NOMS::Command::XMLHttpRequest.origin = @origin
        NOMS::Command::XMLHttpRequest.useragent = @useragent
        @v8[:XMLHttpRequest] = NOMS::Command::XMLHttpRequest
        script_index = 0
        @document.script.each do |script|
            if script.respond_to? :has_key? and script.has_key? '$source'
                # Parse relative URL and load
                request_error = nil
                begin
                    response, landing_url = @useragent.get(script['$source'])
                rescue StandardError => e
                    @log.debug "Setting request_error (#{e.class}) to #{e.message})"
                    request_error = e
                end
                # Don't need landing_url
                script_name = File.basename(@useragent.absolute_url(script['$source']).path)
                script_ref = "#{script_index},#{script_name}"
                if request_error.nil? and response.success?
                    case response.content_type
                    when /^(application|text)\/(x-|)javascript/
                        begin
                            @v8.eval response.body
                        rescue StandardError => e
                            @log.warn "Javascript[#{script_ref}] error: #{e.message}"
                            @log.debug { e.backtrace.join("\n") }
                        end
                    else
                        @log.warn "Unsupported script type '#{response.content_type.inspect}' " +
                            "for script from #{script['$source'].inspect}"
                    end
                else
                    if request_error
                        @log.warn "Couldn't load script from #{script['$source'].inspect} " +
                            "(#{request_error.class}): #{request_error.message})"
                        @log.debug { request_error.backtrace.join("\n") }
                    else
                        @log.warn "Couldn't load script from #{script['$source'].inspect}: " +
                            "#{response.statusText}"
                    end
                end
            else
                # It's javascript text
                script_ref = "#{script_index},\"#{abbrev(script)}\""
                begin
                    @v8.eval script
                rescue StandardError => e
                    @log.warn "Javascript[#{script_ref}] error: #{e.message}"
                    @log.debug { e.backtrace.join("\n") }
                end
            end
            script_index += 1
        end
    end
end