resource_namer.h

Go to the documentation of this file.

// Copyright 2010 Google Inc.

#ifndef NET_INSTAWEB_REWRITER_PUBLIC_RESOURCE_NAMER_H_
#define NET_INSTAWEB_REWRITER_PUBLIC_RESOURCE_NAMER_H_

#include "base/logging.h"
#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/base/string.h"
#include "pagespeed/kernel/base/string_util.h"

namespace net_instaweb {

class Hasher;

class ResourceNamer {
 public:
  static const int kOverhead;

  ResourceNamer() {}
  ~ResourceNamer() {}


  bool Decode(const StringPiece& encoded_string, int hash_length,
              int signature_length);

  bool DecodeIgnoreHashAndSignature(StringPiece encoded_string);

  GoogleString Encode() const;

  GoogleString EncodeIdName() const;


  int EventualSize(const Hasher& hasher, int signature_length) const;

  StringPiece id() const { return id_; }
  StringPiece options() const { return options_; }
  StringPiece name() const { return name_; }
  StringPiece hash() const { return hash_; }
  StringPiece ext() const { return ext_; }
  StringPiece experiment() const { return experiment_; }
  StringPiece signature() const { return signature_; }

  bool has_experiment() const { return !experiment_.empty(); }
  bool has_options() const { return !options_.empty(); }

  void set_id(const StringPiece& p) { p.CopyToString(&id_); }
  void set_options(const StringPiece& opts) { opts.CopyToString(&options_); }
  void set_name(const StringPiece& n) { n.CopyToString(&name_); }
  void set_hash(const StringPiece& h) { h.CopyToString(&hash_); }
  void set_ext(const StringPiece& e) {
    CHECK(e.empty() || e[0] != '.');
    e.CopyToString(&ext_);
  }
  void set_experiment(const StringPiece& e) { e.CopyToString(&experiment_); }
  void set_signature(const StringPiece& s) { s.CopyToString(&signature_); }

  void ClearHash() { hash_.clear(); }
  void CopyFrom(const ResourceNamer& other);


  GoogleString PrettyName() const {return  InternalEncode(); }

 private:
  GoogleString InternalEncode() const;
  bool LegacyDecode(const StringPiece& encoded_string);

  GoogleString id_;
  GoogleString options_;
  GoogleString name_;
  GoogleString hash_;
  GoogleString ext_;
  GoogleString experiment_;
  GoogleString signature_;

  
};

}  

#endif