Class: Goodcheck::ImportLoader

Inherits:
Object
  • Object
show all
Defined in:
lib/goodcheck/import_loader.rb

Defined Under Namespace

Classes: UnexpectedSchemaError

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cache_path:, expires_in: 3 * 60, force_download:, config_path:) ⇒ ImportLoader

Returns a new instance of ImportLoader.



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# File 'lib/goodcheck/import_loader.rb', line 16

def initialize(cache_path:, expires_in: 3 * 60, force_download:, config_path:)
  @cache_path = cache_path
  @expires_in = expires_in
  @force_download = force_download
  @config_path = config_path
end

Instance Attribute Details

#cache_path ⇒ Object (readonly)

Returns the value of attribute cache_path.



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# File 'lib/goodcheck/import_loader.rb', line 11

def cache_path
  @cache_path
end

#config_path ⇒ Object (readonly)

Returns the value of attribute config_path.



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# File 'lib/goodcheck/import_loader.rb', line 14

def config_path
  @config_path
end

#expires_in ⇒ Object (readonly)

Returns the value of attribute expires_in.



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# File 'lib/goodcheck/import_loader.rb', line 12

def expires_in
  @expires_in
end

#force_download ⇒ Object (readonly)

Returns the value of attribute force_download.



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# File 'lib/goodcheck/import_loader.rb', line 13

def force_download
  @force_download
end

Instance Method Details

#cache_name(uri) ⇒ Object 



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# File 'lib/goodcheck/import_loader.rb', line 44

def cache_name(uri)
  Digest::SHA2.hexdigest(uri.to_s)
end

#load(name, &block) ⇒ Object 



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# File 'lib/goodcheck/import_loader.rb', line 23

def load(name, &block)
  uri = URI.parse(name)

  case uri.scheme
  when nil, "file"
    load_file uri, &block
  when "http", "https"
    load_http uri, &block
  else
    raise UnexpectedSchemaError.new("Unexpected URI schema: #{uri.class.name}")
  end
end

#load_file(uri) ⇒ Object 



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# File 'lib/goodcheck/import_loader.rb', line 36

def load_file(uri)
  path = (config_path.parent + uri.path)

  begin
    yield path.read
  end
end

#load_http(uri) ⇒ Object 



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# File 'lib/goodcheck/import_loader.rb', line 48

def load_http(uri)
  hash = cache_name(uri)
  path = cache_path + hash

  Goodcheck.logger.info "Calculated cache name: #{hash}"

  download = false

  if force_download
    Goodcheck.logger.debug "Downloading: force flag"
    download = true
  end

  if !download && !path.file?
    Goodcheck.logger.debug "Downloading: no cache found"
    download = true
  end

  if !download && path.mtime + expires_in < Time.now
    Goodcheck.logger.debug "Downloading: cache expired"
    download = true
  end

  if download
    path.rmtree if path.exist?
    Goodcheck.logger.info "Downloading content..."
    content = HTTPClient.new.get_content(uri)
    Goodcheck.logger.debug "Downloaded content: #{content[0, 1024].inspect}#{content.size > 1024 ? "..." : ""}"
    yield content
    write_cache uri, content
  else
    Goodcheck.logger.info "Reading content from cache..."
    yield path.read
  end
end

#write_cache(uri, content) ⇒ Object 



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# File 'lib/goodcheck/import_loader.rb', line 84

def write_cache(uri, content)
  path = cache_path + cache_name(uri)
  path.write(content)
end