public function streaming_read_callback($curl_handle, $file_handle, $length)
{
// Once we've sent as much as we're supposed to send...
if ($this->read_stream_read >= $this->read_stream_size) {
// Send EOF
return '';
}
// If we're at the beginning of an upload and need to seek...
if ($this->read_stream_read == 0 && isset($this->seek_position) && $this->seek_position !== ftell($this->read_stream)) {
if (fseek($this->read_stream, $this->seek_position) !== 0) {
throw new RequestCore_Exception('The stream does not support seeking and is either not at the requested position or the position is unknown.');
}
}
$read = fread($this->read_stream, min($this->read_stream_size - $this->read_stream_read, $length));
// Remaining upload data or cURL's requested chunk size
$this->read_stream_read += strlen($read);
$out = $read === false ? '' : $read;
// Execute callback function
if ($this->registered_streaming_read_callback) {
call_user_func($this->registered_streaming_read_callback, $curl_handle, $file_handle, $out);
}
return $out;
}