request_properties.h

// Copyright 2013 Google Inc. All Rights Reserved.

#ifndef NET_INSTAWEB_REWRITER_PUBLIC_REQUEST_PROPERTIES_H_
#define NET_INSTAWEB_REWRITER_PUBLIC_REQUEST_PROPERTIES_H_

#include "net/instaweb/rewriter/public/device_properties.h"
#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/base/gtest_prod.h"
#include "pagespeed/kernel/base/scoped_ptr.h"
#include "pagespeed/kernel/base/string_util.h"
#include "pagespeed/kernel/http/user_agent_matcher.h"

namespace net_instaweb {

class DownstreamCachingDirectives;
class AbstractLogRecord;
class RequestHeaders;

class RequestProperties {
 public:
  explicit RequestProperties(UserAgentMatcher* matcher);
  virtual ~RequestProperties();

  void SetUserAgent(StringPiece user_agent_string);
  void ParseRequestHeaders(const RequestHeaders& request_headers);

  bool SupportsImageInlining() const;
  bool SupportsLazyloadImages() const;
  bool SupportsCriticalCss() const;
  bool SupportsCriticalCssBeacon() const;
  bool SupportsCriticalImagesBeacon() const;
  bool SupportsJsDefer(bool enable_mobile) const;
  bool SupportsWebpInPlace() const;
  bool SupportsWebpRewrittenUrls() const;
  bool SupportsWebpLosslessAlpha() const;
  bool SupportsWebpAnimated() const;
  bool IsBot() const;
  UserAgentMatcher::DeviceType GetDeviceType() const;
  bool IsMobile() const;
  bool IsTablet() const;
  bool ForbidWebpInlining() const;
  bool AcceptsGzip() const;
  void LogDeviceInfo(AbstractLogRecord* log_record,
                     bool enable_aggressive_rewriters_for_mobile);
  bool RequestsSaveData() const;
  bool HasViaHeader() const;

 private:
  friend class ImageRewriteTest;
  FRIEND_TEST(RequestPropertiesTest, GetScreenGroupIndex);

  scoped_ptr<DeviceProperties> device_properties_;
  scoped_ptr<DownstreamCachingDirectives> downstream_caching_directives_;

  mutable LazyBool supports_image_inlining_;
  mutable LazyBool supports_js_defer_;
  mutable LazyBool supports_lazyload_images_;
  mutable LazyBool supports_webp_in_place_;
  mutable LazyBool supports_webp_rewritten_urls_;
  mutable LazyBool supports_webp_lossless_alpha_;
  mutable LazyBool supports_webp_animated_;

  
};

}  

#endif