/**
* Create the aggregate stream that will be used to upload the POST data
*/
private function createStream(array $fields, array $files)
{
$this->stream = new Stream\AppendStream();
foreach ($fields as $name => $field) {
$this->stream->addStream(Stream\create($this->getFieldString($name, $field)));
}
foreach ($files as $file) {
if (!$file instanceof PostFileInterface) {
throw new \InvalidArgumentException('All POST fields must ' . 'implement PostFieldInterface');
}
$this->stream->addStream(Stream\create($this->getFileHeaders($file)));
$this->stream->addStream($file->getContent());
$this->stream->addStream(Stream\create("\r\n"));
}
// Add the trailing boundary
$this->stream->addStream(Stream\create("--{$this->boundary}--"));
}
