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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef NET_TOOLS_FLIP_SERVER_MEM_CACHE_H_
      6 #define NET_TOOLS_FLIP_SERVER_MEM_CACHE_H_
      7 
      8 #include <map>
      9 #include <string>
     10 
     11 #include "base/compiler_specific.h"
     12 #include "base/memory/scoped_ptr.h"
     13 #include "net/tools/flip_server/balsa_headers.h"
     14 #include "net/tools/flip_server/balsa_visitor_interface.h"
     15 #include "net/tools/flip_server/constants.h"
     16 
     17 namespace net {
     18 
     19 class StoreBodyAndHeadersVisitor: public BalsaVisitorInterface {
     20  public:
     21   void HandleError() { error_ = true; }
     22 
     23   // BalsaVisitorInterface:
     24   virtual void ProcessBodyInput(const char *input, size_t size) OVERRIDE {}
     25   virtual void ProcessBodyData(const char *input, size_t size) OVERRIDE;
     26   virtual void ProcessHeaderInput(const char *input, size_t size) OVERRIDE {}
     27   virtual void ProcessTrailerInput(const char *input, size_t size) OVERRIDE {}
     28   virtual void ProcessHeaders(const BalsaHeaders& headers) OVERRIDE {
     29     // nothing to do here-- we're assuming that the BalsaFrame has
     30     // been handed our headers.
     31   }
     32   virtual void ProcessRequestFirstLine(const char* line_input,
     33                                        size_t line_length,
     34                                        const char* method_input,
     35                                        size_t method_length,
     36                                        const char* request_uri_input,
     37                                        size_t request_uri_length,
     38                                        const char* version_input,
     39                                        size_t version_length) OVERRIDE {}
     40   virtual void ProcessResponseFirstLine(const char *line_input,
     41                                         size_t line_length,
     42                                         const char *version_input,
     43                                         size_t version_length,
     44                                         const char *status_input,
     45                                         size_t status_length,
     46                                         const char *reason_input,
     47                                         size_t reason_length) OVERRIDE {}
     48   virtual void ProcessChunkLength(size_t chunk_length) OVERRIDE {}
     49   virtual void ProcessChunkExtensions(const char *input,
     50                                       size_t size) OVERRIDE {}
     51   virtual void HeaderDone() OVERRIDE {}
     52   virtual void MessageDone() OVERRIDE {}
     53   virtual void HandleHeaderError(BalsaFrame* framer) OVERRIDE;
     54   virtual void HandleHeaderWarning(BalsaFrame* framer) OVERRIDE;
     55   virtual void HandleChunkingError(BalsaFrame* framer) OVERRIDE;
     56   virtual void HandleBodyError(BalsaFrame* framer) OVERRIDE;
     57 
     58   BalsaHeaders headers;
     59   std::string body;
     60   bool error_;
     61 };
     62 
     63 ////////////////////////////////////////////////////////////////////////////////
     64 class FileData {
     65  public:
     66   FileData();
     67   FileData(const BalsaHeaders* headers,
     68            const std::string& filename,
     69            const std::string& body);
     70   ~FileData();
     71 
     72   BalsaHeaders* headers() { return headers_.get(); }
     73   const BalsaHeaders* headers() const { return headers_.get(); }
     74 
     75   const std::string& filename() { return filename_; }
     76   const std::string& body() { return body_; }
     77 
     78  private:
     79   scoped_ptr<BalsaHeaders> headers_;
     80   std::string filename_;
     81   std::string body_;
     82 
     83   DISALLOW_COPY_AND_ASSIGN(FileData);
     84 };
     85 
     86 ////////////////////////////////////////////////////////////////////////////////
     87 
     88 class MemCacheIter {
     89  public:
     90   MemCacheIter() :
     91       file_data(NULL),
     92       priority(0),
     93       transformed_header(false),
     94       body_bytes_consumed(0),
     95       stream_id(0),
     96       max_segment_size(kInitialDataSendersThreshold),
     97       bytes_sent(0) {}
     98   explicit MemCacheIter(FileData* fd) :
     99       file_data(fd),
    100       priority(0),
    101       transformed_header(false),
    102       body_bytes_consumed(0),
    103       stream_id(0),
    104       max_segment_size(kInitialDataSendersThreshold),
    105       bytes_sent(0) {}
    106   FileData* file_data;
    107   int priority;
    108   bool transformed_header;
    109   size_t body_bytes_consumed;
    110   uint32 stream_id;
    111   uint32 max_segment_size;
    112   size_t bytes_sent;
    113 };
    114 
    115 ////////////////////////////////////////////////////////////////////////////////
    116 
    117 class MemoryCache {
    118  public:
    119   typedef std::map<std::string, FileData*> Files;
    120 
    121  public:
    122   MemoryCache();
    123   virtual ~MemoryCache();
    124 
    125   void CloneFrom(const MemoryCache& mc);
    126 
    127   void AddFiles();
    128 
    129   // virtual for unittests
    130   virtual void ReadToString(const char* filename, std::string* output);
    131 
    132   void ReadAndStoreFileContents(const char* filename);
    133 
    134   FileData* GetFileData(const std::string& filename);
    135 
    136   bool AssignFileData(const std::string& filename, MemCacheIter* mci);
    137 
    138  private:
    139   void ClearFiles();
    140 
    141   Files files_;
    142   std::string cwd_;
    143 };
    144 
    145 class NotifierInterface {
    146  public:
    147   virtual ~NotifierInterface() {}
    148   virtual void Notify() = 0;
    149 };
    150 
    151 }  // namespace net
    152 
    153 #endif  // NET_TOOLS_FLIP_SERVER_MEM_CACHE_H_
    154