contents.hxx

一个著名的SIP协议栈

#ifndef RESIP_Contents_hxx
#define RESIP_Contents_hxx

#include <iosfwd>
#include <vector>

#include "resip/stack/LazyParser.hxx"
#include "resip/stack/Mime.hxx"
#include "resip/stack/StringCategory.hxx"
#include "resip/stack/Headers.hxx"
#include "resip/stack/HeaderFieldValue.hxx"
#include "rutil/Data.hxx"
#include "resip/stack/ContentsFactory.hxx"

namespace resip
{

class Token;
class Contents;
class HeaderFieldValue;
class ParseBuffer;

// MIME header types
class MIME_Header
{
};

class H_ContentID : public MIME_Header
{
   public:
      typedef Token Type;
};
extern H_ContentID h_ContentID;

class H_ContentDescription : public MIME_Header
{
   public:
      typedef StringCategory Type;
};
extern H_ContentDescription h_ContentDescription;
      
// Common type for all body contents
class Contents : public LazyParser
{
   public:
      // pass Mime instance for parameters

      Contents(HeaderFieldValue* headerFieldValue, const Mime& contentsType);
      Contents(const Mime& contentsType);
      Contents(const Contents& rhs);
      Contents(const Contents& rhs,HeaderFieldValue::CopyPaddingEnum e);
      virtual ~Contents();
      Contents& operator=(const Contents& rhs);

      void preParseHeaders(ParseBuffer& pb);
      std::ostream& encodeHeaders(std::ostream& str) const;

      // access to wrapped contents (signed, encrypted)
      virtual Contents* getContents() {return this;}

      Contents* getContents(const Mime&);

      virtual Data getBodyData() const;

      virtual Contents* clone() const = 0;
      const Mime& getType() const {return mType;}

      static Contents* createContents(const Mime& contentType, 
                                      const Data& contents);

      bool exists(const HeaderBase& headerType) const;
      void remove(const HeaderBase& headerType);

      bool exists(const MIME_Header& headerType) const;
      void remove(const MIME_Header& headerType);

      // !dlb! break into const and non-const -- throw on const if not exists
      // !dlb! requires a nested exception...

      // shared header types
      H_ContentType::Type& header(const H_ContentType& headerType) const;
      H_ContentDisposition::Type& header(const H_ContentDisposition& headerType) const;
      H_ContentTransferEncoding::Type& header(const H_ContentTransferEncoding& headerType) const;
      H_ContentLanguages::Type& header(const H_ContentLanguages& headerType) const;

      // MIME specific header types
      H_ContentID::Type& header(const H_ContentID& headerType) const;
      H_ContentDescription::Type& header(const H_ContentDescription& headerType) const;

      int& version() {return mVersion;}
      int& minorVersion() {return mMinorVersion;}

      void addBuffer(char* buf);

   protected:
      // !bwc! Calls freeMem(), then reverts members to a default state
      // (including setting pointers to 0)
      inline void clear()
      {
         freeMem();
         init();
      }
      
      inline void init()
      {
         mBufferList.clear();
         mDisposition = 0;
         mTransferEncoding = 0;
         mLanguages = 0;
         mId = 0;
         mDescription = 0;
         mLength = 0;
         mVersion = 1;
         mMinorVersion = 0;
      }

      void init(const Contents& orig);

      // !bwc! Just frees up heap-allocated stuff, doesn't set pointers to 0
      // This exists because it is pointless (and inefficient) to revert 
      // members to a default state while deleting (they're just going to go
      // out of scope anyway) The d'tor is the only thing that uses this by
      // itself. Everything else should use clear()
      inline void freeMem()
      {
         delete mDisposition;
         delete mTransferEncoding;
         delete mLanguages;
         delete mId;
         delete mDescription;
         delete mLength;

         for (std::vector<char*>::iterator i = mBufferList.begin();
              i != mBufferList.end(); i++)
         {
            delete [] *i;
         }

      }
      virtual const Data& errorContext() const;

      mutable Mime mType;
      mutable H_ContentDisposition::Type *mDisposition;
      mutable H_ContentTransferEncoding::Type *mTransferEncoding;      
      mutable H_ContentLanguages::Type *mLanguages;
      mutable Token *mId;
      mutable H_ContentDescription::Type *mDescription;
      mutable StringCategory *mLength;

      mutable int mVersion;
      mutable int mMinorVersion;

      std::vector<char*> mBufferList;
};

}

#endif

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