Exiv2::HttpIo Class Reference

Provides the http read/write access for the RemoteIo. More...

#include <basicio.hpp>

Inheritance diagram for Exiv2::HttpIo:

Protected Member Functions

 HttpIo (HttpIo &rhs)
 Copy constructor.
 
HttpIooperator= (const HttpIo &rhs)
 Assignment operator.
 
- Protected Member Functions inherited from Exiv2::RemoteIo
 RemoteIo ()
 Default Constructor.
 
- Protected Member Functions inherited from Exiv2::BasicIo
 BasicIo ()
 Default Constructor.
 

Creators

 HttpIo (const std::string &url, size_t blockSize=1024)
 Constructor that accepts the http URL on which IO will be performed. The constructor does not open the file, and therefore never failes. More...
 
virtual ~HttpIo ()
 Default Destructor.
 

Additional Inherited Members

- Public Types inherited from Exiv2::BasicIo
enum  Position { beg, cur, end }
 Seek starting positions.
 
typedef std::auto_ptr< BasicIoAutoPtr
 BasicIo auto_ptr type.
 
- Public Member Functions inherited from Exiv2::RemoteIo
virtual ~RemoteIo ()
 Destructor. Releases all managed memory.
 
virtual int open ()
 Connect to the remote server, get the size of the remote file and allocate the array of blocksMap. More...
 
virtual int close ()
 Reset the IO position to the start. It does not release the data. More...
 
virtual long write (const byte *data, long wcount)
 Not support this method. More...
 
virtual long write (BasicIo &src)
 Write data that is read from another BasicIo instance to the remote file. More...
 
virtual int putb (byte data)
 Not support. More...
 
virtual DataBuf read (long rcount)
 Read data from the memory blocks. Reading starts at the current IO position and the position is advanced by the number of bytes read. If the memory blocks are not populated (False), it will connect to server and populate the data to memory blocks. More...
 
virtual long read (byte *buf, long rcount)
 Read data from the the memory blocks. Reading starts at the current IO position and the position is advanced by the number of bytes read. If the memory blocks are not populated (!= bMemory), it will connect to server and populate the data to memory blocks. More...
 
virtual int getb ()
 Read one byte from the memory blocks. The IO position is advanced by one byte. If the memory block is not populated (!= bMemory), it will connect to server and populate the data to the memory block. More...
 
virtual void transfer (BasicIo &src)
 Remove the contents of the file and then transfer data from the src BasicIo object into the empty file. More...
 
virtual int seek (long offset, Position pos)
 Move the current IO position. More...
 
virtual bytemmap (bool=false)
 Not support. More...
 
virtual int munmap ()
 Not support. More...
 
virtual long tell () const
 Get the current IO position. More...
 
virtual long size () const
 Get the current memory buffer size in bytes. More...
 
virtual bool isopen () const
 Returns true if the memory area is allocated.
 
virtual int error () const
 Always returns 0.
 
virtual bool eof () const
 Returns true if the IO position has reach the end, otherwise false.
 
virtual std::string path () const
 Returns the URL of the file.
 
virtual BasicIo::AutoPtr temporary () const
 Returns a temporary data storage location. Currently returns an empty MemIo object, but callers should not rely on this behavior since it may change. More...
 
virtual void populateFakeData ()
 Mark all the bNone blocks to bKnow. This avoids allocating memory for parts of the file that contain image-date (non-metadata/pixel data) More...
 
- Protected Attributes inherited from Exiv2::RemoteIo
Impl * p_
 

Detailed Description

Provides the http read/write access for the RemoteIo.

Constructor & Destructor Documentation

Exiv2::HttpIo::HttpIo ( const std::string &  url,
size_t  blockSize = 1024 
)

Constructor that accepts the http URL on which IO will be performed. The constructor does not open the file, and therefore never failes.

Parameters
urlThe full path of url
blockSizethe size of the memory block. The file content is divided into the memory blocks. These blocks are populated on demand from the server, so it avoids copying the complete file.

The documentation for this class was generated from the following file: