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# openvrml::stream_listener Class Reference

`#include <openvrml/browser.h>`

List of all members.

## Detailed Description

An interface to simplify asynchronously reading a `resource_istream`.

## Public Member Functions

virtual | ~stream_listener ()=0 throw ()
| Destroy.
void | stream_available (const std::string &uri, const std::string &media_type)
| Called once the stream is available for use.
void | data_available (const std::vector< unsigned char > &data)
| Called when data is available.

## Private Member Functions

virtual void | do_stream_available (const std::string &uri, const std::string &media_type)=0
| Called by `stream_available`.
virtual void | do_data_available (const std::vector< unsigned char > &data)=0
| Called by `data_available`.

## Constructor & Destructor Documentation

openvrml::stream_listener::~stream_listener | ( |  | ) | throw ()`[pure virtual]`

Destroy.

## Member Function Documentation

void openvrml::stream_listener::stream_available | ( | const std::string & | uri,
|  | const std::string & | media_type |
| ) |  |  |

Called once the stream is available for use.

This function calls `do_stream_available`.

Parameters:

  `[in]` | uri | the URI associated with the stream.
  `[in]` | media_type | the MIME media type for the stream.

void openvrml::stream_listener::data_available | ( | const std::vector< unsigned char > & | data | ) |

Called when data is available.

This function calls `do_data_available`.

Parameters:

  `[in]` | data | the data.

void openvrml::stream_listener::do_stream_available | ( | const std::string & | uri,
|  | const std::string & | media_type |
| ) |  |  | `[private, pure virtual]`

Called by `stream_available`.

Concrete `stream_listeners` must override this function.

Parameters:

  `[in]` | uri | the URI associated with the stream.
  `[in]` | media_type | the MIME media type for the stream.

void openvrml::stream_listener::do_data_available | ( | const std::vector< unsigned char > & | data | ) | `[private, pure virtual]`

Called by `data_available`.

Parameters:

  `[in]` | data | the data.