Class: Camo::Server

Inherits:
Object
  • Object
show all
Includes:
HeadersUtils, Rack::Utils
Defined in:
lib/camo/server.rb

Constant Summary collapse

ALLOWED_REMOTE_HEADERS = 
HeaderHash[%w[
  Content-Type
  Cache-Control
  eTag
  Expires
  Last-Modified
  Content-Length
  Content-Encoding
].map(&:downcase)]

Constants included from HeadersUtils

HeadersUtils::HOSTNAME, HeadersUtils::REQUEST_SECURITY_HEADERS, HeadersUtils::RESPONSE_SECURITY_HEADERS, HeadersUtils::TIMING_ALLOW_ORIGIN

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from HeadersUtils

#default_request_headers, #default_response_headers, user_agent, #user_agent

Constructor Details

#initialize(key) ⇒ Server

Returns a new instance of Server.

Raises:



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# File 'lib/camo/server.rb', line 21

def initialize(key)
  @key = String(key)
  raise Errors::UndefinedKeyError if @key.empty?
end

Instance Attribute Details

#key ⇒ Object (readonly)

Returns the value of attribute key.



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# File 'lib/camo/server.rb', line 19

def key
  @key
end

#request ⇒ Object (readonly)

Returns the value of attribute request.



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# File 'lib/camo/server.rb', line 19

def request
  @request
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/camo/server.rb', line 26

def call(env)
  build_request(env)

  return [404, default_response_headers, []] unless request.method == "GET"

  unless request.valid_digest?
    logger.error("Invalid digest")
    return [401, default_response_headers, ["Invalid digest"]]
  end

  unless request.valid_request?
    logger.error(request.errors)
    return [422, default_response_headers, request.errors.join(", ")]
  end

  logger.debug "Request", {
    type: request.digest_type,
    url: request.url,
    headers: request.headers,
    destination: request.destination_url,
    digest: request.digest
  }

  status, headers, body = client.get(request.destination_url, request.headers)
  headers = build_response_headers(headers)
  logger.debug "Response", {status: status, headers: headers, body_bytesize: body.bytesize}

  [status, headers, [body]]
rescue Errors::ClientError => e
  logger.error(e.message)
  [422, default_response_headers, e.message]
end