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PR_TransmitFile
===============
Sends a complete file across a connected socket.
Syntax
------
.. code::
#include <prio.h>
PRInt32 PR_TransmitFile(
PRFileDesc *networkSocket,
PRFileDesc *sourceFile,
const void *headers,
PRInt32 hlen,
PRTransmitFileFlags flags,
PRIntervalTime timeout);
Parameters
~~~~~~~~~~
The function has the following parameters:
``networkSocket``
A pointer to a :ref:`PRFileDesc` object representing the connected
socket to send data over.
``sourceFile``
A pointer to a :ref:`PRFileDesc` object representing the file to send.
``headers``
A pointer to the buffer holding the headers to be sent before sending
data.
``hlen``
Length of the ``headers`` buffer in bytes.
``flags``
One of the following flags:
- :ref:`PR_TRANSMITFILE_KEEP_OPEN` indicates that the socket will be kept
open after the data is sent.
- :ref:`PR_TRANSMITFILE_CLOSE_SOCKET` indicates that the connection should
be closed immediately after successful transfer of the file.
``timeout``
Time limit for completion of the transmit operation.
Returns
~~~~~~~
- A positive number indicates the number of bytes successfully written,
including both the headers and the file.
- The value -1 indicates a failure. If an error occurs while sending
the file, the ``PR_TRANSMITFILE_CLOSE_SOCKET`` flag is ignored. The
reason for the failure can be obtained by calling :ref:`PR_GetError`.
Description
-----------
The :ref:`PR_TransmitFile` function sends a complete file (``sourceFile``)
across a connected socket (``networkSocket``). If ``headers`` is
non-``NULL``, :ref:`PR_TransmitFile` sends the headers across the socket
before sending the file.
The enumeration ``PRTransmitFileFlags``, used in the ``flags``
parameter, is defined as follows:
.. code::
typedef enum PRTransmitFileFlags {
PR_TRANSMITFILE_KEEP_OPEN = 0,
PR_TRANSMITFILE_CLOSE_SOCKET = 1
} PRTransmitFileFlags;